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Sarah from Austinjust started a free trial
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Wait — grab 50 free credits
Don't leave empty-handed. Drop your email and we'll unlock 50 verified contact lookups, free.
Inbound Labs was the first platform where we didn't have to second-guess the data. Every email, every phone number — it just works. It's now the backbone of our entire outbound operation.
👤
Josh Whitfield
Founder at CMM Agency · 4.9★ G2 review
Rated #1 for Data Accuracy
★★★★★4.8/ 5 · 1,200+ reviews on G2
Reviews verified by G2 · Updated weekly
🏆
G2 Leader
Winter 2025
⚡
Easiest to Use
2025
📈
High Performer
Mid-Market
🎯
Best Results
SMB 2025
Trusted by teams at
SALESFORCEHUBSPOTSNYKSTRIPE
Trusted by 15,000+ companies worldwide
🏢Accenture
⚡Salesforce
🟠HubSpot
🔒Snyk
💳Stripe
🚀Outreach
🎯Salesloft
📊Gartner
🌐Cloudflare
🤖DataRobot
💼Deloitte
📦Twilio
🏢Accenture
⚡Salesforce
🟠HubSpot
🔒Snyk
💳Stripe
🚀Outreach
🎯Salesloft
📊Gartner
🌐Cloudflare
🤖DataRobot
💼Deloitte
📦Twilio
Integrations
Plug into your entire stack in minutes
Connect Inbound Labs to every tool your team already uses. Push verified data directly into your CRM, sequencer, or custom workflow — no manual exports.
We tested four enrichment tools side by side. Inbound Labs was the only one where the data didn't need cleaning after. Everything came back accurate and ready to use.
👤
Felix Fernandez
CEO · Firefly Growth Accelerator
"
The job change filter helps us reach qualified leads the moment they switch roles — before anyone else does. This alone is worth the entire subscription.
👤
Sönke Venjacob
Founder · Platinum Agency
"
We've used a lot of email finders. Inbound Labs is the only one where the emails are actually verified. Our bounce rate dropped by over 70% in the first month.
👤
Pete Lipton
Snr. Director of Sales · Snyk
"
Syncing lead lists to our CRM used to take hours. With Inbound Labs it's instant, and the data is clean on arrival. Our reps actually use it now.
👤
Brigitta Ruha
Founder · Growth Today
"
Finding verified mobile numbers felt like a cheat code. We're booking 40% more calls with hard-to-reach executives. Nothing else comes close.
👤
Henry Clayton
Principal SDR · Allego
"
The verified mobile filter is a game changer. Our team prioritizes high-quality leads and cuts through the noise on every campaign we run.
👤
Tai Shiver
Manager of BD · Loopio
"
We tested four enrichment tools side by side. Inbound Labs was the only one where the data didn't need cleaning after. Everything came back accurate and ready to use.
👤
Felix Fernandez
CEO · Firefly Growth Accelerator
"
The job change filter helps us reach qualified leads the moment they switch roles — before anyone else does. This alone is worth the entire subscription.
👤
Sönke Venjacob
Founder · Platinum Agency
"
We've used a lot of email finders. Inbound Labs is the only one where the emails are actually verified. Our bounce rate dropped by over 70% in the first month.
👤
Pete Lipton
Snr. Director of Sales · Snyk
"
Syncing lead lists to our CRM used to take hours. With Inbound Labs it's instant, and the data is clean on arrival. Our reps actually use it now.
👤
Brigitta Ruha
Founder · Growth Today
"
Finding verified mobile numbers felt like a cheat code. We're booking 40% more calls with hard-to-reach executives. Nothing else comes close.
👤
Henry Clayton
Principal SDR · Allego
"
The verified mobile filter is a game changer. Our team prioritizes high-quality leads and cuts through the noise on every campaign we run.
"Our 50 AEs run on Inbound Labs. Results tripled. The team at IL treats us like partners." — Director of Sales, Snyk
💡 What counts as a credit?
1 credit = 1 verified email address or 1 verified mobile number. You only pay when we successfully return a verified result. If we can't find a valid email or mobile, no credit is deducted.
500 contacts = 500 credits max
Email only = 1 credit per email
Email + Mobile = 2 credits per person
💰 ROI Calculator
See how Inbound Labs pays for itself. Adjust the sliders to match your team.
60
Hours saved per month vs manual research
$3,200
Saved vs ZoomInfo equivalent plan
+42
Extra meetings from verified data
Full feature comparison
Feature
Starter
Growth
Enterprise
Credits & Data
Monthly credits
500
2,500
Unlimited
Verified email lookup
✓
✓
✓
Verified mobile numbers
✓
✓
✓
Domain search
–
✓
✓
Bulk CSV enrichment
–
✓
✓
Prospecting & Filters
B2B database access
✓
✓
✓
Intent data filters
–
✓
✓
Job change alerts
–
✓
✓
Headcount growth signals
–
✓
✓
Integrations & API
Chrome extension
✓
✓
✓
CRM push (HubSpot, SF)
–
✓
✓
Zapier / Make
–
✓
✓
API access
–
10k calls/mo
Unlimited
Support & Security
User seats
1
5
Unlimited
Support
Email
Priority
Dedicated CSM
GDPR / DPA
✓
✓
✓
SSO / SAML
–
–
✓
Frequently asked questions
Unused credits do not roll over. Each billing cycle starts fresh. We recommend choosing a plan that matches your monthly volume to avoid waste.
Yes. No contracts, no lock-ins. Cancel from your dashboard at any time and you'll retain access until the end of your current billing period.
Yes. We maintain a full opt-out database, provide Data Processing Agreements on all plans, and store all data in EU-region servers by default. Enterprise plans include dedicated GDPR support.
Our data is aggregated from public business records, professional network profiles, company websites, and opted-in business directories. All data goes through a multi-step verification pipeline before it reaches you.
Email records are refreshed weekly. Mobile numbers are validated monthly. Job titles and company data are updated bi-weekly. We update over 12M records every week across our database.
We offer a 7-day money-back guarantee on your first paid month if you're not satisfied. After that, we don't offer refunds for partially used periods but you can cancel to stop future charges.
Credits are shared across the entire team. Each seat gives a user full access to the platform. Growth plans include 5 seats; Enterprise includes unlimited seats with admin controls and SSO.
Absolutely. You can start a free trial with 50 credits right now — no credit card needed. Or book a 20-minute demo with our team and we'll walk you through the platform with your ICP in mind.
Start free today.
50 verified lookups. No credit card. Upgrade when you're ready.
Your reps deserve verified emails, direct mobiles, and in-market signals — not 3 hours a day cleaning lists. Inbound Labs gives them everything they need to close.
Standardize data inputs across every team, protect domain health, and give every rep a predictable, clean source of verified leads at a clear cost per contact.
"Pete got 50 AEs prospecting 4–6 hours per week. Response rates tripled from 0.9% because the data actually worked. We finally had emails that landed."
Snyk's sales org had 50 account executives who were expected to self-source pipeline alongside closing inbound leads. The problem was the data. Reps were spending significant time sourcing contacts from multiple providers, manually verifying emails, and still seeing bounce rates above 20% once they launched campaigns.
Pete Lipton, Senior Director of Sales, calculated that the average AE was spending 8–10 hours per week on prospecting admin — cleaning lists, validating emails, fixing CRM entries. At 50 reps, that was 400–500 hours of selling time lost every single week.
The Solution
Pete standardized the entire sales org on Inbound Labs. Every AE got access to the same verified contact database with direct mobile numbers. The Chrome extension let reps enrich contacts directly from LinkedIn without switching tools. CRM push integration meant zero manual data entry — contacts flowed straight into Salesforce with enriched fields populated.
The team standardized on 4–6 hours of prospecting per week per AE — focused entirely on outreach, not data administration. Inbound Labs handled verification, enrichment, and CRM sync automatically.
The Results
Before: 0.9%
3.6%
↑ Email reply rate
Before: 8-10hrs/week
4-6hrs
↓ Time on prospecting
Before: 22% bounce
<2%
↓ Email bounce rate
"The ROI was immediate. In the first month, pipeline from AE self-sourcing increased by 40%. By month three, it had more than doubled. Inbound Labs paid for itself in week two."
Meritt's sales team was spending enormous time on prospecting but the data quality was inconsistent across different providers. Bounce rates were high, which was hurting email deliverability. The RevOps team calculated they were generating $100K in weekly pipeline but knew the ceiling was much higher.
The Solution
Meritt standardized all outbound data on Inbound Labs. The weekly-refreshed database meant contacts were always current. Intent signals allowed the team to prioritize accounts that were actively in-market.
"We now reach buyers before they even talk to a competitor. Inbound Labs is the only data provider we use for clients and our own growth."
— Felix Frank, Founder at StackOptimise
StackOptimise is a boutique outbound agency that helps B2B SaaS companies build repeatable pipeline. They've scaled to $1M ARR with Inbound Labs as their core data infrastructure.
As an outbound agency, StackOptimise's entire business depends on deliverability and reply rates. When they used multiple data providers, inconsistent quality across client campaigns made results unpredictable and hard to scale.
The Solution
Felix and Penn Frank standardized 100% of client prospecting on Inbound Labs. Every client campaign uses the same data source — same verification standards, same freshness cadence, same reliability.
"Connect rate jumped from 5% to 22%. We stopped fighting gatekeepers and started reaching decision-makers directly. It felt like a cheat code."
— Seth DeHart, Founder Led Sales
Seth DeHart runs Founder Led Sales, a community and coaching program teaching founders to build $1M+ ARR through personal outbound. He needed direct contact data that actually worked.
Seth was doing founder-led sales outreach and hitting roadblocks. Company main lines route to reception. Published mobile numbers are often assistants. Even LinkedIn DMs go unread by busy executives. The answer was verified direct mobile numbers for C-suite and VP-level prospects.
The Solution
Seth used Inbound Labs' mobile number finder to enrich his prospect lists with verified direct mobiles. Combined with buying intent signals, he could call the right people at the right moment — when they were actively researching solutions.
"New SDRs had 15–20 real conversations in their first week. Before, it was 3–4. When reps succeed early, they stay. Our retention improved alongside pipeline."
— Sales Director, GreyScout
GreyScout is a fast-growing SaaS company that was struggling with SDR ramp time and early attrition. The root cause turned out to be bad data leading to early discouragement.
GreyScout was hiring SDRs and losing them within 3–4 months. Exit interviews kept surfacing the same theme: reps felt like they were calling into a void. Lists had bad numbers, emails bounced, no one answered. Early discouragement was the primary driver of attrition.
The Solution
GreyScout standardized new SDR onboarding on Inbound Labs. Every new hire started with a curated, verified list of ICP contacts with direct mobile numbers. Instead of spending week one learning how to build lists, they spent it making calls and having real conversations.
We tell you exactly where our data comes from, how we verify it, and how often we refresh it. Because you deserve to know.
280M
Total contacts
98%
Email accuracy
Weekly
Data refresh
Data Sources
Where our data comes from.
We aggregate from 5 independent source categories and cross-validate every data point for maximum accuracy.
🌐
Public Business Records
Official company registries, incorporation databases, and public filings across 150+ countries. Provides verified company data and executive information.
🏢
Company Websites
Direct extraction from contact pages, about pages, and structured data on millions of company websites. Updated continuously.
💼
Professional Directories
Opted-in professional network data from business directories, industry associations, and conference attendee lists.
🤝
User-Verified Contributions
Opt-in data shared by users who choose to contribute their professional information in exchange for expanded platform access.
🔗
Third-Party Partnerships
Licensed data from vetted B2B data partners who meet our quality and compliance standards. Every partner is GDPR audited annually.
🔄
Continuous Re-verification
All data points are re-verified on a rolling schedule. Emails weekly, mobiles monthly, firmographic data bi-weekly. Stale data is flagged or removed.
Verification Process
How we verify every email.
Every email goes through 6 verification steps before it's marked as verified. Only emails that pass every step are delivered to you.
1
Syntax Check
Valid email format?
→
2
Domain Check
Domain exists & active?
→
3
MX Records
Can receive email?
→
4
SMTP Ping
Mailbox accepts mail?
→
5
Catch-all
Not a catch-all?
→
6
Confidence Score
90%+ confidence?
✅
Result: 98% deliverability rate
Only emails passing all 6 steps are marked "Verified" and included in your export. Failed emails are not charged to your account.
Data Freshness
How often we refresh each data type.
📧 Email Addresses
Weekly refresh
📱 Mobile Numbers
Monthly refresh
💼 Job Titles
Bi-weekly refresh
🏢 Company Data
Bi-weekly refresh
🔥 Intent Signals
Real-time
📊 12 million records are updated every week across our entire database.
Compliance
GDPR, CCPA & beyond.
🇪🇺
GDPR Compliant
We operate under Article 6(1)(f) legitimate interest for B2B professional data. Full opt-out database maintained. Data Processing Agreements available on all plans.
🇺🇸
CCPA Compliant
California Consumer Privacy Act compliance built in. Data subject access requests handled within 30 days. Do-not-sell registry maintained.
🔒
Data Security
All data encrypted at rest (AES-256) and in transit (TLS 1.3). EU-region servers by default. Annual penetration testing. SOC2 Type II in progress.
👤
Data Subject Rights
We honor all data subject requests — access, deletion, correction, and portability. Submit requests at our opt-out portal. Processed within 30 days.
📋
Sub-processors
Full list of sub-processors available in our Trust Center. All sub-processors are vetted for GDPR compliance and subject to data processing agreements.
📄
Data Processing Agreement
DPAs available to all paid customers. Enterprise customers get dedicated legal review support and custom DPA negotiation if needed.
🇪🇺 GDPR Certified
🇺🇸 CCPA Compliant
🔒 256-bit Encryption
📄 DPA Available
Data you can trust. Results you can prove.
See our 98% accuracy rate for yourself — 50 free lookups, no credit card.
✓ Our Take: Inbound Labs wins on accuracy and price
Inbound Labs vs ZoomInfo: The Honest Comparison (2025)
We're biased, obviously. But we built this comparison with real numbers because we think the data speaks for itself.
TL;DR SummaryWhere we winWhere they winPricingSwitching
TL;DR
6-point comparison at a glance
Category
Inbound Labs
ZoomInfo
Starting price
$49/month
~$15,000/year
Email accuracy
98% verified
~82% typical
Mobile numbers
60M verified mobiles
Available (extra cost)
Contract required
No — month to month
Annual minimum
GDPR compliance
Full — DPA on all plans
Available (enterprise)
G2 rating
4.8 ★
4.4 ★
Where We Win
Where Inbound Labs clearly beats ZoomInfo
💰
Price: 95% cheaper
ZoomInfo Enterprise starts at $15,000/year for a single user seat. Inbound Labs Growth plan is $149/month for 5 seats. For most teams, that's 95%+ savings.
🎯
Email Accuracy: 98% vs ~82%
In our 10,000-contact benchmark test comparing both platforms, Inbound Labs delivered 98% deliverability vs 82% for ZoomInfo contacts. That's 160% fewer bounces.
📋
No Annual Contract Lock-in
ZoomInfo requires annual contracts with significant early termination fees. Inbound Labs is month-to-month. Cancel anytime. No contracts, no lawyers, no headaches.
Being Honest
Where ZoomInfo is ahead
We believe in honest comparisons. ZoomInfo has a larger total database — around 300M+ profiles vs our 280M. For companies needing niche enterprise or government contacts, ZoomInfo may have slightly more coverage in those specific segments.
They also have a more mature enterprise feature set including intent data from their media network (TechTarget), which is more sophisticated than ours for certain enterprise buying scenarios.
However: larger database + more features doesn't mean better results. Our customers consistently see better deliverability and reply rates because we prioritize accuracy over volume.
Switching
How to switch from ZoomInfo
1
Export your ZoomInfo lists
Download all your current contact lists as CSV from ZoomInfo.
2
Sign up for Inbound Labs free
Create your account — takes 2 minutes, no credit card.
3
Re-verify your existing lists
Upload your CSV and re-verify all emails for free.
4
Cancel ZoomInfo at renewal
Give 30 days notice before your ZoomInfo renewal date.
🎁
Switching from ZoomInfo?
Get 500 bonus credits when you switch. Just mention "switching from ZoomInfo" when you sign up.
Inbound Labs vs Apollo: The Honest Comparison (2025)
Both tools are in a similar price range, but they're built for different things. Here's exactly how they compare.
SummaryWhere we winWhere Apollo winsSwitching
Category
Inbound Labs
Apollo.io
Email accuracy
98% verified
~79% typical
Mobile numbers
60M verified
40M (lower match rate)
Data freshness
Weekly refresh
Monthly refresh
Bounce rate
<2%
8–15% typical
Sequencing built-in
No (integrate instead)
Yes
G2 rating
4.8 ★
4.8 ★
Where We Win
Why Inbound Labs beats Apollo for data quality
🎯
98% vs ~79% Email Accuracy
Apollo's open-source data model means anyone can contribute — which creates quality inconsistency. Our 6-step verification pipeline delivers measurably better results.
🔄
Weekly vs Monthly Refresh
People change jobs every 2–3 years on average. Weekly refresh means your lists stay accurate. Monthly refresh means every list has 3–4 weeks of stale data baked in.
📱
Better Mobile Coverage
60M verified mobiles vs Apollo's 40M — and ours have higher match rates to contact profiles. More verified numbers for your ICP.
Being Honest
Where Apollo is ahead
Apollo has a built-in sequencing engine. If you want to prospect and send campaigns from one tool, Apollo is genuinely convenient. Inbound Labs is data-first — we don't do sequencing, we integrate with the tools you already use (Outreach, Salesloft, etc.).
Apollo also has a free tier with basic features. Our free tier is usage-based (50 credits) rather than a permanent free plan.
🔄
Switching from Apollo?
Get 500 bonus credits when you switch. Your data migrates in minutes via CSV.
Enter a name and company. We'll find and verify their work email using our 6-step verification pipeline.
🔍Email Finder — Live Demo✓ Free to try
s.chen@acme.com
✓ Verified97% confidenceDirect · Not catch-all
Demo only shows sample output · Create a free account to find real emails
Bulk Finder
Upload a CSV. Get emails for all of them.
Upload any CSV with names and company domains. We'll find and verify emails for every row. Perfect for enriching CRM exports, LinkedIn lists, or event attendee data.
Add Inbound Labs to Chrome in one click from the Chrome Web Store. No configuration needed — just sign in with your account.
02
Browse Normally
Visit any LinkedIn profile, company website, or contact page. The extension icon lights up when it detects a professional profile or contact page.
03
Click to Find & Save
Click the Inbound Labs button to instantly find their verified email and direct mobile. Save to your list or push straight to your CRM.
Works On
Prospect everywhere your buyers are.
💼
LinkedIn
Enrich any profile or search result instantly
🌐
Company Websites
Find contacts from any About or Team page
📰
News & Press
Find quoted executives on any news article
📋
Any Web Page
Works wherever there's a name and company
Reviews
What users say about the extension
"
I use this extension on every LinkedIn profile I visit. It just works. Never a wasted click. My prospecting speed tripled in a week.
👤
James T.
SDR · Series B SaaS
"
I found 40 contacts at a target account in 20 minutes. Previously that would have taken me half a day manually. This extension is part of my daily workflow now.
👤
Ana K.
Account Executive · Fintech
"
The one-click CRM push is the killer feature. I prospect on LinkedIn, one click, and the contact is in HubSpot with email and mobile pre-filled. Zero manual entry.
Sign up for the referral program and get a unique tracking link and discount code instantly.
📣
Share It Anywhere
Share your link on LinkedIn, in newsletters, Slack communities, YouTube — anywhere your audience hangs out.
💰
Earn Every Month
Earn 20% of every monthly payment your referrals make — for life. The more they grow, the more you earn.
Potential Earnings
Calculate your commissions.
$149
Monthly commission
$1,788
Annual earnings
$5,364
3-year total (if they stay)
Referral FAQ
Commissions are paid monthly via Stripe, 30 days after your referral's payment clears. Minimum payout is $0 — we pay you no matter the amount.
Forever — as long as the customer you referred keeps paying. If they upgrade their plan, your commission increases. If they cancel, your commission stops.
No cap. Some of our top affiliates earn $3,000–$8,000/month from referrals. The more customers you refer, the more you earn.
Yes — your referral code gives new users 10% off their first 3 months. It's a win-win: they get a discount, you earn a commission.
Start earning today
Turn your network into income.
20% recurring commission. Monthly payouts. No limit.
Everything you need to evaluate Inbound Labs from a security, privacy, and compliance perspective. No gatekeeping.
🇪🇺
GDPR Compliance
Full GDPR compliance under Article 6(1)(f) legitimate interest for B2B data. Data Processing Agreements available to all paid customers. EU-region data storage by default.
Download DPA Template →
🇺🇸
CCPA Compliance
California Consumer Privacy Act compliant. Data subject requests honored within 30 days. Do-not-sell and do-not-share registries maintained and updated daily.
View CCPA Policy →
🔒
Data Security
All data encrypted at rest (AES-256) and in transit (TLS 1.3). Penetration testing conducted annually by a third-party security firm. SOC2 Type II audit in progress.
Security Overview →
📄
Sub-Processors
Full list of sub-processors disclosed. All sub-processors are contractually bound to equivalent data protection standards. Updated when changes are made with 30 days notice.
View Sub-processors →
👤
Data Subject Rights
We honor access, deletion, correction, and portability requests. Submit via our opt-out portal. Processed within 30 days. Enterprise customers get a dedicated privacy contact.
Opt-Out Portal →
🤝
Enterprise DPA
Enterprise customers can negotiate custom Data Processing Agreements. We support standard clauses, SCCs, and custom addenda. Legal review support included.
Contact Legal Team →
Security Checklist
What's in place to protect your data.
✓AES-256 encryption at rest
✓TLS 1.3 encryption in transit
✓EU-region servers (AWS Frankfurt)
✓Annual penetration testing
✓SOC2 Type II (in progress)
✓Role-based access control
✓Two-factor authentication
✓99.9% uptime SLA (Enterprise)
✓Audit logs on all data access
✓Vulnerability disclosure program
✓Automatic data deletion on cancel
✓DPA available on all paid plans
Enterprise Trust
Need custom compliance review?
Enterprise customers get dedicated support for security questionnaires, custom DPA negotiation, vendor risk assessments, and compliance documentation requests.
✓ Our Take: Inbound Labs wins on price — similar quality
Inbound Labs vs Cognism: The Honest Comparison (2025)
Cognism is strong on GDPR and phone data. Here's exactly where we're better, and where they are.
SummaryWhere we winWhere they winSwitch
Category
Inbound Labs
Cognism
Starting price
$49/month
~$15,000/year (custom)
Email accuracy
98% verified
~89% (Diamond Data)
GDPR compliance
Full — all plans
Strong — their USP
Phone verified data
60M mobile
Strong Diamond Verified
Contract required
No
Annual minimum
Self-serve signup
Yes — instant
Demo required
Where We Win
💰
Price: 95% cheaper
Cognism requires enterprise pricing — typically $15k+ per year. Inbound Labs starts at $49/month with no annual contract.
⚡
Instant Self-Serve Access
Cognism requires a demo call before you can access the product. With Inbound Labs, sign up in 2 minutes and start finding contacts immediately.
📊
Better US Coverage
Cognism is strongest in EMEA. For US-focused outbound, Inbound Labs has stronger coverage, particularly for SMB and mid-market contacts.
Cognism's Diamond Verified phone data is genuinely excellent — they manually verify phone numbers before listing them. Their GDPR compliance story is also strong and well-documented for enterprise buyers in Europe.
If you're a large enterprise selling primarily in EMEA and need the absolute highest-quality phone verification, Cognism is worth evaluating. For most teams — especially those outside enterprise or focused on the US — Inbound Labs delivers equivalent or better results at a fraction of the cost.
🔄
Switching from Cognism?
500 bonus credits when you switch. Mention "Cognism" on signup.
✓ Our Take: Inbound Labs wins on B2B contacts, mobiles, and scale
Inbound Labs vs Hunter.io: The Honest Comparison (2025)
Hunter.io is great for email finding. But it's not a B2B database. Here's the real difference.
Category
Inbound Labs
Hunter.io
Total contacts
280M B2B contacts
Domain-based only
Mobile numbers
60M verified
Not available
ICP prospecting
50+ filters
Domain search only
Email finding
Full finder + bulk
Strong — their core
Pricing
From $49/month
From $34/month
Intent data
Yes (Growth+)
No
The Real Difference
🔍
Hunter finds emails. Inbound Labs finds leads.
Hunter is an email finder — you need to already know who to contact. Inbound Labs helps you discover and prioritise the right people to contact in the first place.
📱
Mobile Numbers
Hunter has no mobile numbers. Inbound Labs provides 60M verified direct mobiles — critical for phone-first outbound strategies.
🎯
ICP Building
Hunter can't build prospecting lists. Inbound Labs has 50+ filters to find exactly who you need — by title, industry, tech stack, intent, and more.
Hunter.io is excellent at what it does — finding email addresses for a known person. If your workflow is "I know exactly who I want to contact, I just need their email," Hunter does that well and cheaply.
But if you need to build prospecting lists, filter by ICP criteria, find mobile numbers, or understand buying intent — Hunter simply doesn't do those things. You'd need to combine it with 2–3 other tools to replicate what Inbound Labs does in one place.
🔄
Switching from Hunter?
500 bonus credits when you switch. One tool instead of three.
Tactics, templates, and data-backed guides from the Inbound Labs team — used by 15,000+ sales professionals.
📧
⭐ Featured
Cold Email Masterclass: 47 Subject Lines That Generated 100,000+ Replies
We analysed 2.4 million cold emails sent through Inbound Labs in 2024. Here are the subject lines, openers, and CTAs that generated the highest reply rates — segmented by industry.
How to Build a Prospect List That Actually Converts (2025 Guide)
The 5 filters every rep should use before adding a contact. Plus the one signal that predicts buying intent better than anything else.
🕐 8 min readDec 2024
✉️
Cold Email
The Cold Email Formula That Gets 34% Reply Rates (With Templates)
Our most shared post. The exact framework we've seen generate the highest reply rates — with real examples you can steal today.
🕐 12 min readDec 2024
📊
Data & Tools
Why Your Domain Is Getting Blacklisted (And How Bad Data Causes It)
High bounce rates don't just hurt open rates — they get your domain blacklisted. Here's the exact threshold, what causes it, and how to fix it.
🕐 6 min readNov 2024
💼
LinkedIn
LinkedIn Prospecting in 2025: The Sequences That Work Now
LinkedIn's algorithm punishes generic connection requests. Here's exactly what to say — and what to avoid — to get 40%+ acceptance rates.
🕐 9 min readNov 2024
🔥
Prospecting
Intent Data Explained: How to Find Buyers Who Are Ready to Buy
What buying intent signals actually mean, which ones correlate with deals closed, and how to use them to prioritise your outreach.
🕐 10 min readOct 2024
📝
Templates
30 Cold Email Templates by Industry (SaaS, Agency, FinTech, & More)
Plug-and-play templates for 12 industries. Every template is tested with real send data — we show you the open and reply rate for each.
🕐 15 min readOct 2024
🤖
Data & Tools
The B2B Data Stack for 2025: Every Tool Your Team Actually Needs
Honest breakdown of every major category — contact data, intent, enrichment, sequencing — and which tools win in each.
🕐 11 min readSep 2024
🚫
Cold Email
Why Your Cold Emails Go to Spam (And the 7 Fixes That Work)
Technical deliverability issues that most reps don't know about. The checklist we recommend to every new Inbound Labs customer.
🕐 7 min readSep 2024
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LinkedIn
How to Use Sales Navigator + Inbound Labs to Build Your Perfect List
The exact workflow: Sales Nav search → LinkedIn profile enrichment → verified email/mobile → CRM push. Step by step.
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Home›API Documentation
REST API
API Reference
Full programmatic access to Inbound Labs data. Available on Growth and Enterprise plans.
✓ REST API · JSON responses
Version: v1
Base URL: api.inboundlabs.io/v1
Authentication
API Keys
Endpoints
Find Email
Verify Email
Domain Search
Enrich Contact
Search Database
Resources
Rate Limits
Error Codes
SDKs & Libraries
Webhooks
Authentication
All API requests require an API key passed in the Authorization header.
# Example request with API key
curl -X GET "https://api.inboundlabs.io/v1/find" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json"
⚠️ Keep your API key secret. Never expose it in client-side code or public repositories.
GET/v1/findFind email by name + domain
Returns a verified email address for a given name and company domain. Costs 1 credit per successful lookup.
Parameters
name
string
Required. Full name of the person (e.g. "Sarah Chen")
Applications reviewed within 24 hours · No minimum following required
Home›Changelog
What's New
Changelog
New features, improvements, and fixes. Updated every time we ship.
Feb 2025
New
Intent Data Signals now available on Growth plan
Filter your prospect searches by buying intent signals — identify accounts actively researching solutions in your category. Previously Enterprise-only, now available on all Growth subscriptions.
Feb 2025
Improved
HubSpot integration now supports custom properties
Map any Inbound Labs contact field to a custom HubSpot property. Supports multi-select, date, and number field types. Set up once, applied to all future exports.
Jan 2025
New
Bulk Email Verification — upload up to 50,000 rows
Upload a CSV with any email column and verify every address in bulk. Results returned within 60 seconds for up to 1,000 emails, up to 4 hours for 50,000. Only charged for verified addresses found.
Jan 2025
Improved
Chrome Extension v2.4 — 40% faster, works on more sites
Significant performance improvement to the extension. Contact detection now works on 300+ additional site templates. LinkedIn enrichment is now 40% faster on average.
Dec 2024
New
Salesforce integration — bidirectional sync
Inbound Labs now supports two-way sync with Salesforce. Contacts enriched in SF are reflected in your Inbound Labs lists, and new prospects found in Inbound Labs sync automatically to your chosen SF object.
Dec 2024
Fixed
CSV exports now correctly handle Unicode characters in names
Fixed an issue where contact names containing accented characters (é, ü, ñ, etc.) would render incorrectly in Excel on Windows. UTF-8 BOM now included in all CSV exports.
Nov 2024
New
Team Seats — share credits across your organisation
Invite unlimited team members on Growth and Enterprise plans. Admins can set per-seat credit limits, view usage by team member, and transfer credits between seats.
Nov 2024
Improved
Email verification accuracy improved from 96% to 98%
Added two additional verification steps to our pipeline — greylisting detection and role-account filtering. Bounce rates for customers using verified emails dropped to under 2%.
Home›Comparisons›vs RocketReach
✓ Our Take: Inbound Labs wins on accuracy and pricing
Inbound Labs vs RocketReach: The Honest Comparison (2025)
RocketReach is popular for personal contact finding. Here's the full breakdown on B2B data, pricing, and verification.
SummaryWhere we winWhere they winSwitch
Category
Inbound Labs
RocketReach
Database size
280M B2B contacts
700M+ (includes personal)
B2B email accuracy
98%
~75–80%
Starting price
$49/month
$99/month (25 lookups)
Mobile numbers
60M verified
Limited
ICP filters
50+ filters
Basic (title, company)
Intent data
Yes — Growth+
No
GDPR
Full
Partial
CRM integrations
Native HubSpot + SF
Limited
Where We Win
🎯
Higher B2B Accuracy
RocketReach's large database includes a lot of personal emails and outdated data. For B2B outbound, 98% verified vs ~75–80% means the difference between landing in the inbox and getting bounced.
💰
Better Value at Every Tier
RocketReach starts at $99/month for just 25 lookups. Inbound Labs gives you more lookups, better accuracy, and native integrations at $49/month.
🔍
ICP Prospecting
RocketReach is primarily a contact finder — you need to know who you're looking for. Inbound Labs helps you discover and filter new prospects using 50+ ICP criteria.
RocketReach's biggest strength is its total database size — 700M+ records including personal emails. If you frequently need to find personal contact information or data on individuals outside the B2B context, it has a larger raw pool. It also has a reasonable Chrome extension for individual lookups.
For B2B sales prospecting specifically — building ICP lists, verified outbound at scale, intent data, and CRM integration — Inbound Labs is the better choice on accuracy, price, and workflow.
🔄
Switching from RocketReach?
500 bonus credits when you switch. Mention "RocketReach" on signup.
✓ Our Take: Inbound Labs wins on database scale and non-EU coverage
Inbound Labs vs Kaspr: The Honest Comparison (2025)
Kaspr is a solid LinkedIn-focused contact tool popular in Europe. Here's how it compares to Inbound Labs for full B2B prospecting.
Category
Inbound Labs
Kaspr
B2B contacts
280M global
~120M (EMEA-strong)
Email accuracy
98%
~88%
Free tier
50 trial credits
Generous free plan
LinkedIn integration
Chrome extension
Deep LinkedIn focus
US coverage
Excellent
Limited
ICP filters / database
50+ filters
LinkedIn-based only
Starting paid price
$49/month
$49/month
GDPR
Full
Strong (EU-focused)
Where We Win
🌍
Global Coverage
Kaspr is primarily optimised for European contacts. For global outbound — particularly US, APAC, and LATAM — Inbound Labs has significantly better coverage.
🔍
ICP Building Beyond LinkedIn
Kaspr is LinkedIn-dependent. Inbound Labs has a full searchable database with 50+ filters — no LinkedIn account needed to build a targeted prospect list.
📊
Intent Data & Enrichment
Kaspr focuses on contact finding. Inbound Labs adds buying intent signals, technology stack data, and company funding information to help you prioritise who to contact.
Kaspr's free tier is genuinely generous — a great way to test the tool without committing. Their LinkedIn Chrome extension is polished and specifically designed for the LinkedIn workflow. If your prospecting is 90% LinkedIn-based and focused on European contacts, Kaspr is worth evaluating.
For teams who need to build ICP lists from scratch, prospect across global markets, or integrate data into a full stack with intent signals and CRM sync — Inbound Labs offers a materially broader solution.
🔄
Switching from Kaspr?
500 bonus credits when you switch. Mention "Kaspr" on signup.
✓ Our Take: Inbound Labs wins on prospecting; Clearbit wins on enrichment depth
Inbound Labs vs Clearbit: The Honest Comparison (2025)
Clearbit (now HubSpot Enrichment) is a powerful enrichment tool. Here's how it compares to Inbound Labs as a prospecting and data platform.
Category
Inbound Labs
Clearbit
Primary use case
Prospecting + enrichment
Enrichment + forms
Standalone prospecting
Full database + ICP filters
Not a prospecting tool
Email finding
Name + domain → email
Limited
Real-time enrichment
Yes — Growth+
Yes — core feature
Form enrichment / reveal
Not available
Excellent — their USP
Company data depth
Good
Deep — 100+ attributes
Pricing
$49/month
$999+/month typically
Self-serve
Yes — instant
Demo required
The Honest Breakdown
🎯
Different Tools, Different Jobs
Clearbit is a data enrichment platform — it adds attributes to contacts you already have. Inbound Labs helps you find the contacts in the first place. They're often used together.
💰
20× Price Difference
Clearbit typically costs $1,000–$5,000/month. Inbound Labs starts at $49. For most SMB and mid-market teams, Inbound Labs provides 80% of the value at 5% of the price.
🔗
Now Part of HubSpot
Clearbit was acquired by HubSpot in 2023 and is being integrated into their platform. If you're not a HubSpot customer, its future as a standalone tool is uncertain.
Clearbit's real-time form enrichment and website visitor reveal are genuinely powerful features Inbound Labs doesn't have. If your goal is to enrich inbound form submissions or identify anonymous website visitors with company data, Clearbit (now HubSpot Enrichment) is the better tool for those specific jobs.
For outbound prospecting — building ICP lists, finding verified emails, getting mobile numbers, and pushing contacts to your sequences — Inbound Labs is purpose-built for that workflow at a fraction of the cost.
🔄
Looking for a Clearbit alternative?
500 bonus credits to get started. Mention "Clearbit" on signup.