Hunter.io pioneered domain-based email finding and still leads that category in 2026. This review tests real accuracy numbers, domain search quality, the built-in verifier, and whether the Campaigns feature competes with dedicated sending tools.
Hunter.io is an email finding tool built around one core feature: given a company domain, find the email addresses of people who work there. It uses a combination of web crawling, public data, and pattern inference (the email format at most companies follows a consistent pattern like [email protected]).
Enter any company domain and Hunter returns all email addresses it has found for that organisation, with sources, confidence scores, and job titles where available.
Enter a person name and company domain. Hunter infers or confirms the email address using the domain pattern and public sources.
Run any email address through Hunter verification to get a deliverability verdict. Marks addresses as valid, invalid, or accept-all (catch-all).
Upload a CSV of domains (for domain search) or name+domain pairs (for email finder). Process thousands of records without using the UI.
Send cold email sequences directly from Hunter. Basic sequence builder with scheduling, personalisation variables, and open/click tracking.
Full REST API for all features. Available on all paid plans. Used to embed Hunter lookups in CRMs, enrichment pipelines, and Zapier workflows.
Based on BounceZero verification of 15,000 Hunter-sourced addresses (Jan-Jun 2026). Accuracy varies by industry and domain type.
Hunter marks catch-all domains as accept-all (orange) and cannot determine individual mailbox validity. These domains represent 18-22% of B2B targets. BounceZero probe-tests individual mailboxes on catch-all domains using secondary verification methods.
M365 tenant configurations frequently block SMTP verification probes. Hunter marks these as unverified even when the mailbox is valid. BounceZero uses JMAP and tenant fingerprinting to verify M365 addresses that SMTP cannot reach.
Hunter crawls the public web - articles, LinkedIn profiles, company pages. Addresses in public sources may be months or years old. Hunter has no data freshness signal; BounceZero runs live MX checks and flags domains with high bounce history.
Hunter is optimised for company domains. It has limited coverage for consultants, freelancers, and individuals on personal domains. For personal-domain targeting, Apollo or LinkedIn enrichment tools have better coverage.
| Plan | Price/month | Credits/month | ≈ Verifications | Key features |
|---|---|---|---|---|
| Free | $0 | 50 | 100 | Domain search, Email Finder, basic Campaigns |
| Starter | $49 | 2,000 | 4,000 | Bulk tasks, API access, CSV export |
| Growth | $149 | 10,000 | 20,000 | Team accounts, priority support |
| Scale | $299 | 25,000 | 50,000 | Dedicated account manager, SLA |
Annual billing saves approximately 30%. Unused credits roll over within the same plan tier. Hunter now uses a unified credit model - searches consume 1 credit, verifications 0.5 credit. USD prices as reported; Hunter displays regional pricing (verified Aug 2026, UK: £41 / £125 / £251).
| Feature | Hunter.io | Apollo.io | Lusha |
|---|---|---|---|
| Email accuracy (verified) | 85-91% | 73-78% | 75-80% |
| Domain search (all emails at a company) | Best-in-class | Good | Limited |
| Contact database (by role/industry) | Limited | 200M+ contacts | 20M+ contacts |
| Mobile phone numbers | No | Yes (limited) | Yes (strong) |
| Built-in verifier | Yes | Yes | Yes |
| Catch-all detection | Basic | Basic | Basic |
| Cold email campaigns | Yes (basic) | Yes (advanced) | No |
| Free plan | 50 credits | Limited contacts | 5 credits |
| API access | All paid plans | All paid plans | Paid plans |
| Starting price | $49/mo | $49/mo | $29/user/mo |
| Best for | Account-based targeting (1 company at a time) | Volume prospecting (many companies) | Phone-first outreach |
You have a target account list and need to find contacts at specific companies. Hunter domain search is the fastest way to map decision-makers at a known set of companies.
Hunter displays the email pattern (e.g. {first}.{last}@company.com) for each domain, so you can construct addresses for contacts not yet in the database.
Hunter free plan (50 credits/month) is sufficient for finding contact emails for reporting, partnership outreach, or single-company research.
Hunter search limits cap volume. Apollo gives 10x more contacts per dollar. For 500+ new prospects per day, Hunter becomes a bottleneck.
Hunter is email-only. No phone numbers. Lusha or ZoomInfo for phone-first teams.
Hunter has no buyer intent signals, technographic data, or company news triggers. Apollo and ZoomInfo are stronger for signal-based outreach.
Even Hunter verified addresses include catch-alls and M365 unknowns. Run your export through BounceZero to catch what Hunter misses. 100 free credits, 8 minutes per 1,000 contacts.
Ayoub built BounceZero's 5-stage validation pipeline, its dedicated BGP-announced IP infrastructure, and the Patroni HA PostgreSQL cluster behind every verification. Previously built high-volume email delivery infrastructure. Trained at 1337 Benguerir (École 42 network, 2019). Open-source: bgp_analyzer.
Apollo, ZoomInfo, Lusha and Cognism all have accuracy gaps - verify exports before sending
Snov.io alternatives in 2026: Hunter.io, Apollo, FindyMail, Kaspr, Cognism, Lusha, and Clay
Apollo, ZoomInfo, Clay, Hunter, Lusha, Cognism - ranked for cold email prospecting
Email finder + drip campaigns + warmup in one tool
Phone accuracy vs Apollo - who wins for cold email
Waterfall enrichment, AI first lines, and is $167-446+/mo worth it
Domain search vs ICP prospecting - when to use each and how to stack them
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