Paste the address
Drop any email into the pill — Gmail, Outlook, custom domains, or role aliases like info@ and sales@. Verify one address free right now, or upload a CSV to check a whole list once you sign up.
Instant Email Verification
The Free Email Checker That Verifies Any Address
Paste any address and catch invalid, disposable, and catch-all emails with 99.99% accuracy on the same 9-point engine as paid plans.
Free to try. No signup, no card.
Trusted by 500,000+ leading GTM teams of all sizes
From name to verified inbox
How the email verifier works
Three steps, no signup, no card on file. Paste any address, watch the nine-check engine verify it, read the verdict in two seconds.
Run the 9-check engine
Nine checks fire in parallel: syntax, DNS, and MX records, a live SMTP handshake, catch-all and disposable detection, role and domain-age signals, mailbox state, and email authentication. The full verdict then lands in about two seconds.
Verdict in 2 seconds
Every address comes back valid, invalid, or risky, with a confidence score, the full per-check breakdown, and a recommended retry policy. Read the result right there on the page, or pull it straight from the API.
Free tier, explained
What email checkers actually do
Not a stripped-down demo of the real engine. The same nine checks paid plans run, with usage limits only.
A free email checker tells you whether an address can actually receive mail before you send to it. Paste one in and Verifox runs the full nine-check engine, syntax, MX records, a live SMTP handshake, catch-all detection, whether the domain looks disposable, even domain age, and folds everything into a single verdict of safe, risky, or invalid. You get 4 checks a day with no signup at all, 1,000 credits on a free account, and 2,500 if you sign up with a work email.
See it in action
Everything the checker does, on one screen
From one pasted address to a full CSV, every check runs the same nine-layer engine and hands you a verdict you can send on.
Single check
Verify one email in seconds
Paste an address and the checker runs all nine deliverability layers (syntax to live SMTP) and hands back a verdict, a 0-100 confidence score, and the full check-by-check breakdown. You send to a confirmed inbox, never a hopeful guess.
/dashboard/verify
Bulk & CSV
Verify a whole list at once
Upload a CSV or paste a list, and the checker works the entire batch (the same nine-check engine on every single row), then returns a clean file split into valid, risky, and invalid, ready to export.
/dashboard/lists
API & MCP
Drop it into your stack
One REST call verifies an address and returns the verdict as JSON , with cURL, Node, and Python examples ready to copy. Wiring an AI agent instead? The same verification ships as a native MCP server.
/api-docs
Analytics
Watch your list health over time
Every check you run rolls up into one activity view: volume, valid rate, and risk trends across single checks, bulk jobs, and API calls, so you catch a decaying list before it dents your sender reputation.
/dashboard/lists
One checker, end to end
Everything the checker does
Most free tools stop at a quick syntax check. Our Verify Engine runs the same nine checks as paid plans, combining SMTP, disposable, catch-all, and reputation signals.
Verification engine
9checks on every
checks on every
address
The same nine-check pipeline as the paid API runs on every address, free or not.
No signup to start
Verify your first emails right here, no account, no card.
10k emails a minute
Bulk CSV in, verified list out. Same speed on every plan.
Instantly verified
Every address comes back already checked, with a confidence score.
99.99% accurate
Validated on a 10,000-address mixed benchmark including catch-all domains.
Credits never expire
1,000 free on signup. 2,500 with a work email. Pay as you go after.
Emails are never stored
Processed in memory, dropped on response. SOC 2 · GDPR · CCPA.
How we stack up
Verifox vs the alternatives
NeverBounce and ZeroBounce both verify emails competently. Verifox adds the highest accuracy in the category, free no-signup checks straight from this page, native MCP server support.
★ The accurate checkerVerifox
NeverBounce99.0%
ZeroBounce99.6%
NeverBounce
ZeroBounce
NeverBounce1,000 / monthly
ZeroBounce100 / monthly
NeverBounceYes
ZeroBounceNever
NeverBounceFlagged only
ZeroBounceAI scoring
NeverBounce
ZeroBounce
NeverBounce
ZeroBounce
NeverBounce
ZeroBounce
NeverBounce
ZeroBounce
Pricing
Pay once, or not at all
Most tools reset your balance every month. Verifox sells credits that sit in your account until you spend them.
FreeProve it on your own list before you spend anything.$0
forever
1,000credits on signup
No card required
2,500 with a work email
Free includes
- All 9 checks included
- Full API and bulk CSV
- Catch-all confidence scoring
- No card required
Most popular
Credit packsBuy once, spend whenever. Slide to price your list.$59
one time
10,000credits
$0.0059 eachSAVE 34%
Everything in Free, plus
- Credits never expire
- Verify or find from one pool
- Up to 79% off at volume
- No contract, no minimum
Verifox ONECredits land monthly and stack on your balance.$79
per month
15,000credits a month
$0.0053 each
Unused credits roll over
Everything in packs, plus
- Unused credits roll over
- Our lowest per-email rate
- 50 requests per second API
- Cancel anytime
One credit verifies one address; a find costs 10. All prices in USD, checkout via Stripe.
Built for the teams that ship outbound
Growth leads, marketers, and engineers running real campaigns on real lists, with a verified email on every byline.
90% lower bill, 0.4% bounces
We were paying ZeroBounce a four-figure monthly bill and still landing 3% bounces on cold campaigns. Switched the pipeline to Verifox, dropped to 0.4% bounces, and cut the bill by more than 90%.
Thomas G.GTM Lead, Stripe
Catch-all finally has a verdict
Other tools flag 30% of our B2B list as 'risky catch-all' and leave the call to us. Verifox returns a real verdict on those addresses, with a confidence score. We send more, we send safer.
Brittany K.GTM Lead, HubSpot
Reputation rebuilt in 6 weeks
We had a Gmail spam-folder problem after a bad list import. Verifox cleaned the list and the warmup ran on the same engine. Back in primary inbox in six weeks. One vendor, half the cost.
Dale M.GTM Lead, Slack
0.7% bounce on 50k
Ran a 50,000-address outbound list through Verifox before our quarterly campaign. Bounces landed at 0.7%, sender reputation didn't move, replies were up 22% over last quarter.
Erica K.GTM Lead, Discord
MCP in 10 minutes
Their MCP server let me wire email verification directly into our internal Claude agent in about ten minutes. Zero glue code. No other vendor in this space has thought about that workflow.
Greg L.GTM Lead, OpenAI
10k/min held under 400ms
Tested Verifox at 10,000 verifications per minute on a Tuesday morning. Latency held under 400ms median, no soft failures, no rate-limit walls. The vendor we benched throttled at 2,000/min.
Rini V.Product Manager, Vercel
Hygiene that doesn't break pipeline
Our SDRs were enriching from three tools and 14% of the emails were invalid before they hit the sequencer. Verifox sits in the pipeline now and the team stopped seeing 'undeliverable' replies the next week.
Jonathan A.GTM Lead, MongoDB
Bulk that actually ships
Bulk upload, sorted CSV back in twenty minutes, plug into our growth stack. The half-day list-hygiene project per cohort turned into something the marketing intern runs on autopilot.
Emma F.GTM Lead, Linear
Scores you can act on
Verifox returns a 0-100 confidence score per address, not just a label. We thresholded at 75 for the cold sequencer, 60 for nurture, and our deliverability team finally has a knob they can tune.
David H.GTM Lead, Snowflake
90% lower bill, 0.4% bounces
We were paying ZeroBounce a four-figure monthly bill and still landing 3% bounces on cold campaigns. Switched the pipeline to Verifox, dropped to 0.4% bounces, and cut the bill by more than 90%.
Thomas G.GTM Lead, Stripe
Reputation rebuilt in 6 weeks
We had a Gmail spam-folder problem after a bad list import. Verifox cleaned the list and the warmup ran on the same engine. Back in primary inbox in six weeks. One vendor, half the cost.
Dale M.GTM Lead, Slack
MCP in 10 minutes
Their MCP server let me wire email verification directly into our internal Claude agent in about ten minutes. Zero glue code. No other vendor in this space has thought about that workflow.
Greg L.GTM Lead, OpenAI
Hygiene that doesn't break pipeline
Our SDRs were enriching from three tools and 14% of the emails were invalid before they hit the sequencer. Verifox sits in the pipeline now and the team stopped seeing 'undeliverable' replies the next week.
Jonathan A.GTM Lead, MongoDB
Scores you can act on
Verifox returns a 0-100 confidence score per address, not just a label. We thresholded at 75 for the cold sequencer, 60 for nurture, and our deliverability team finally has a knob they can tune.
David H.GTM Lead, Snowflake
Catch-all finally has a verdict
Other tools flag 30% of our B2B list as 'risky catch-all' and leave the call to us. Verifox returns a real verdict on those addresses, with a confidence score. We send more, we send safer.
Brittany K.GTM Lead, HubSpot
0.7% bounce on 50k
Ran a 50,000-address outbound list through Verifox before our quarterly campaign. Bounces landed at 0.7%, sender reputation didn't move, replies were up 22% over last quarter.
Erica K.GTM Lead, Discord
10k/min held under 400ms
Tested Verifox at 10,000 verifications per minute on a Tuesday morning. Latency held under 400ms median, no soft failures, no rate-limit walls. The vendor we benched throttled at 2,000/min.
Rini V.Product Manager, Vercel
Bulk that actually ships
Bulk upload, sorted CSV back in twenty minutes, plug into our growth stack. The half-day list-hygiene project per cohort turned into something the marketing intern runs on autopilot.
Emma F.GTM Lead, Linear
90% lower bill, 0.4% bounces
We were paying ZeroBounce a four-figure monthly bill and still landing 3% bounces on cold campaigns. Switched the pipeline to Verifox, dropped to 0.4% bounces, and cut the bill by more than 90%.
Thomas G.GTM Lead, Stripe
0.7% bounce on 50k
Ran a 50,000-address outbound list through Verifox before our quarterly campaign. Bounces landed at 0.7%, sender reputation didn't move, replies were up 22% over last quarter.
Erica K.GTM Lead, Discord
Hygiene that doesn't break pipeline
Our SDRs were enriching from three tools and 14% of the emails were invalid before they hit the sequencer. Verifox sits in the pipeline now and the team stopped seeing 'undeliverable' replies the next week.
Jonathan A.GTM Lead, MongoDB
Catch-all finally has a verdict
Other tools flag 30% of our B2B list as 'risky catch-all' and leave the call to us. Verifox returns a real verdict on those addresses, with a confidence score. We send more, we send safer.
Brittany K.GTM Lead, HubSpot
MCP in 10 minutes
Their MCP server let me wire email verification directly into our internal Claude agent in about ten minutes. Zero glue code. No other vendor in this space has thought about that workflow.
Greg L.GTM Lead, OpenAI
Bulk that actually ships
Bulk upload, sorted CSV back in twenty minutes, plug into our growth stack. The half-day list-hygiene project per cohort turned into something the marketing intern runs on autopilot.
Emma F.GTM Lead, Linear
Reputation rebuilt in 6 weeks
We had a Gmail spam-folder problem after a bad list import. Verifox cleaned the list and the warmup ran on the same engine. Back in primary inbox in six weeks. One vendor, half the cost.
Dale M.GTM Lead, Slack
10k/min held under 400ms
Tested Verifox at 10,000 verifications per minute on a Tuesday morning. Latency held under 400ms median, no soft failures, no rate-limit walls. The vendor we benched throttled at 2,000/min.
Rini V.Product Manager, Vercel
Scores you can act on
Verifox returns a 0-100 confidence score per address, not just a label. We thresholded at 75 for the cold sequencer, 60 for nurture, and our deliverability team finally has a knob they can tune.
David H.GTM Lead, Snowflake
Enterprise-grade security and scale
Every layer of the stack carries a third-party attestation, so you can ship into regulated industries without rebuilding your compliance posture.
SOC 2 Type II
Independently audited to the SOC 2 Type II standard.
GDPR
Built for the EU with full GDPR data-subject rights.
CCPA
California opt-out, do-not-sell, plus DSAR handling.
ISO 27001
Information security held to the ISO 27001 standard.
ISO 42001
AI governance aligned to the new ISO 42001 standard.
Free field manual
The Dead List
An investigation into the money leaking out of your list - and the nine checks that decide whether your email is read, or never arrives at all.
Get the free manual
57 pages, free PDF, no signup
Common questions
Ten honest answers
The questions we get from teams that land here to check an email address for free, with the real numbers, real limits, and real opinions behind our nine-check verification stack.
Is the free email checker actually free?
Yes. You can verify 4 emails per day from this page without an account. No card, no signup.
Create a free account and you get 1,000 verifications on the spot, or 2,500 if your signup email is a work address. After that, credits are pay-as-you-go and never expire on any paid plan, with volume pricing shown for your region.
What does the checker actually look at?
Nine checks run in parallel on every address: syntax and format validation (RFC 5321 and 5322), domain existence and MX presence, an SMTP handshake and mailbox-exists ping, a disposable-domain match, role-address detection, catch-all detection, and an AI-confidence pass on the catch-all hits. Only an address that clears the whole stack comes back valid.
The catch-all resolution is the check most free email validators quietly skip, and it is exactly where 20 to 40 % of B2B email lists fail. That layer, running on the same paid engine, is what keeps the free verdict honest.
How accurate is the free version?
Same engine as the paid plans. 99.99 % accuracy on a 1,000-address benchmark list, including catch-all domains.
The free tier doesn't trade accuracy for the price tag. It caps volume only. Every check the paid Email Verification API runs is the same check the free widget on this page runs.
Do you store the emails I check?
No. Addresses are processed in memory and discarded the moment verification completes. Nothing logged, nothing retained, nothing sold.
We're SOC 2 Type II compliant with the full Trust Center report on request. Read the privacy policyfor the byte-by-byte breakdown of what we touch and what we don't.
Can I check a list of emails for free?
Yes. The free tier gives you 1,000 verifications (2,500 if you sign up with a work email), and that covers most small lists outright.
For larger lists, our paid credit packs are pay-as-you-go and never expire, with pricing localized to your region on the pricing page. CSV upload, API access, and bulk parallel processing are included from the free tier up.
What happens when I hit the daily limit?
Either wait 24 hours, or create a free account to claim 1,000 verifications instantly (2,500 if your signup email is a work address). No card required for the signup tier either.
Most teams move to a paid credit packonce they're verifying lists of 10,000+ addresses regularly.
How fast is the API and what's the SLA?
Median latency is around 380 ms for a single address, sub-50 ms for cached results. Bulk processing runs at roughly 10,000 emails per minute on the standard tier.
SLA is 99.9 % uptime on Starter, 99.99 % with an annual Volume contract. Full real-time uptime + incident history at status.verifox.ai. Implementation details in the API docs.
Do you offer volume discounts or enterprise contracts?
Yes. Volume discounts compound as usage grows, from 5,000 emails up to the steepest per-email rate at 1M+ volume. Exact pricing is shown for your region on the pricing page.
Annual contracts come with dedicated infrastructure, named CSM, SAML SSO, RBAC, and a 99.99 % SLA. Public tiers live on /pricing; for custom terms, talk to sales.
Can I integrate with HubSpot, Salesforce, Zapier, or Klaviyo?
All of those, plus Mailchimp, ActiveCampaign, Brevo, Customer.io, Iterable, and any tool that speaks REST. The full API reference documents the inbound and outbound shapes for every endpoint.
Verifox also ships native MCP server support so AI agents (Claude, Cursor, custom LLM apps) can hit the engine without glue code. Drop the MCP URL into your agent config and the tools are wired.
What's your refund policy?
Credits never expire and are refundable for the first 30 days from purchase, no questions asked. After 30 days, unused credits stay on your account permanently. Keep using them or transfer them to a teammate.
No subscription lock-in, no auto-renewals you have to fight to cancel. Full terms in the refund policy.