Best email verification APIs

The best email verification API, ranked by price per check.

These catalog providers check one address per call and return a verdict such as valid, invalid or catch-all. Ranked by live price per check, with the cost of 1,000 checks next to it.

Give this to your agent

set up looot for Best email verification API - https://looot.ai/best/email-verification-api/skill.md

Dropleads
Kitt AI
MillionVerifier
Icypeas
BounceBan
LeadMagic
Limadata
Scrubby
Tomba
ZeroBounce
Hunter
Findymail
Anysite

The short answer

The best email verification API depends on how it handles catch-all domains and what it returns besides a verdict. For a long list, the cheapest price per check wins, and this page ranks the looot catalog verifiers by that live price. Verifiers disagree on the same address, so read the verdict, not only the price.

Updated 13 October 2026

Cheapest today

Dropleads

$0.00145

Per check for check if an email address can receive mail, read live from the catalog.

$1.45 per 1,000 checks

The ranking

13 providers, one job

Check if an email address can receive mail. Bars show price per check, to scale.

Sort by

01
Dropleads
Returns a status with the domain's mail server and mail provider. On our test it marked a real role address and a made-up mailbox both invalid, and it returns no score.
- 14 endpoints
- Email finder
- Phone finder
$0.00145 / check$1.45 per 1,000 checks
02
Kitt AI
Returns a verdict with a risk level and needs the realtime flag set. On our test it called an address valid but risky that most verifiers marked invalid.
- 4 endpoints
- Email finder
$0.0015 / check$1.50 per 1,000 checks
03
MillionVerifier
A verifier and nothing else: one address in, one result out, and on our test it was among the fastest. There is no finder or enrichment from the same provider.
- 2 endpoints
$0.00178 / check$1.78 per 1,000 checks
04
Icypeas
Runs as an async job and returns a verdict when it finishes. On both test addresses it answered not found and still billed the check.
- 15 endpoints
- Email finder
- Domain search
$0.0019 / check$1.90 per 1,000 checks
05
BounceBan
Returns a verdict such as undeliverable, with a call that waits for the result and batch endpoints for long lists. A slow mail server makes the waiting call slow too.
- 10 endpoints
- Batch verify
- Batch results
$0.0040 / check$4.00 per 1,000 checks
06
LeadMagic
Returns a verdict for one address. It agreed with the majority on our test, but each call took over ten seconds.
- 8 endpoints
- Email finder
- Phone finder
$0.00495 / check$4.95 per 1,000 checks
07
Limadata
Returns a verdict with a score and a catch-all flag. It treated our test domain as catch-all and called both addresses valid, the made-up one included.
- 15 endpoints
- Email finder
- Web search
$0.0060 / check$6.00 per 1,000 checks
08
Scrubby
Returns a verdict with a reason such as a hard bounce, and has a separate deep check for addresses the quick check cannot settle.
- 5 endpoints
- Deep verify
- Batch verify
$0.0078 / check$7.80 per 1,000 checks
09
Tomba
Returns a verdict with an accept-all flag for catch-all domains. One of our two test calls timed out with no charge.
- 20 endpoints
- Email finder
- Phone verify
$0.0089 / check$8.90 per 1,000 checks
10
ZeroBounce
Returns a status with a sub-status that says why, such as mailbox not found. Scoring and activity data are separate endpoints.
- 4 endpoints
- Scoring
- Activity
$0.0100 / check$10.00 per 1,000 checks
11
Hunter
Returns a result with a score and an accept-all status for catch-all domains. It rated both test addresses accept-all and risky, so it did not separate them.
- 8 endpoints
- Email finder
- Domain search
$0.01225 / check$12.25 per 1,000 checks
12
Findymail
Returns a plain verified true or false. That is easy to act on, but it says nothing about why an address failed.
- 10 endpoints
- Email finder
- Phone finder
$0.0198 / check$19.80 per 1,000 checks
13
Anysite
Returns a verdict for one address from a provider whose catalog is mostly scraping endpoints. It has the fewest measured verification runs of the list.
- 119 endpoints
- Email finder
- LinkedIn profile
$0.14388 / check$143.88 per 1,000 checks

Choosing one

Pick by what you need

If you needThe domain's mail server and provider with the verdictPick Dropleads
If you needA verifier and nothing else, fastPick MillionVerifier
If you needBatch endpoints for a long listPick BounceBan
If you needA reason with every invalid resultPick ZeroBounce
If you needA second check for addresses the quick check cannot settlePick Scrubby
If you needA plain true or false to act onPick Findymail

How we rank

What the ranking is built on

Every provider here has an email verification endpoint in the looot catalog, billed per call, one address per call.
We rank by the price per check of that endpoint, read live from the catalog. A cheaper check ranks higher.
We also ran each verifier on 2026-10-28 on the same two addresses at one domain. The verdicts above say what we saw. Two addresses are a sample, not a measured accuracy, so they do not move the rank.
The catalog publishes measured run counts in its search results, but this page does not rank by them. Where a provider has few runs, one bad answer moves the figure a lot.
Extra capabilities do not make a provider rank higher. Providers outside the looot catalog are not ranked.

Cheapest email verification API per 1,000 checks

On 2026-10-28 the cheapest email verification API in the looot catalog is Dropleads at $1.45 per 1,000 checks ($0.00145 per check), then Kitt AI at $1.50 and MillionVerifier at $1.78. The dearest, Anysite, costs $143.88 per 1,000 checks.

Read on 2026-10-28 from the live looot catalog. Prices change when a provider changes its price.
Provider	Per check	Per 1,000 checks
Dropleads	$0.00145	$1.45
Kitt AI	$0.0015	$1.50
MillionVerifier	$0.00178	$1.78
Icypeas	$0.0019	$1.90
BounceBan	$0.0040	$4.00
LeadMagic	$0.00495	$4.95
Limadata	$0.0060	$6.00
Scrubby	$0.0078	$7.80
Tomba	$0.0089	$8.90
ZeroBounce	$0.0100	$10.00
Hunter	$0.01225	$12.25
Findymail	$0.0198	$19.80
Anysite	$0.14388	$143.88

The ranking shows each verifier's live price per check and per 1,000 checks. One check is one address, so 1,000 checks clean a list of 1,000 addresses.

The cheapest check is not the cheapest list if it leaves many addresses as unknown or catch-all. Those need a second verifier, billed on its own.

Email verification API for agents, step by step

Email verifier API results on catch-all domains

A catch-all domain accepts mail for any address, so a mail server check cannot tell a real mailbox from a made-up one. On our test domain, Limadata, Hunter and Tomba flagged catch-all, while most others called both addresses invalid.

Treat catch-all and risky as their own bucket. Send to them slowly, or check them with a second verifier before a campaign.

The prompt

Let your agent pick the cheapest.

Paste the prompt. The agent finds the email verification endpoints, checks each price and runs the cheapest one that fits.

One run is one check.
Runs on demand, whenever you ask.
Checking on a timer needs scheduled runs, not available yet.

Prompt: Best email verification API

Use looot to verify these 20 email addresses: call the cheapest email verification endpoint for each, list the address and the verdict, put catch-all and unknown results in their own group, then tell me the total cost. 1. Set up https://looot.ai/skill.md. 2. Search the catalog for each step and check its price before you call. 3. Run the cheapest endpoint that fits. 4. Show the results as a table and the total cost.

Give this to your agent

Setup command

set up looot for Best email verification API - https://looot.ai/best/email-verification-api/skill.md

FAQ

Questions people ask

It depends on how it handles catch-all domains and what it returns besides a verdict. This page ranks the looot catalog verifiers by live price per check. Pick the cheapest for long lists, and add a second verifier for the catch-all and unknown results.

The first row of the ranking above, read live from the catalog. Prices can change, so the page reads them on each refresh and shows no number when the catalog is unreachable.

This page ranks priced endpoints. Every verifier here bills per check, and a check that answers not found can still be billed, as Icypeas did on our test.

NeverBounce is not in the looot catalog, so this page does not rank it. The verifiers above check one address per call, and your agent calls any of them with one key, billed per check.

A verdict for one address, such as valid, invalid, catch-all, risky or unknown. Many add a score, a reason or the domain's mail server. The words differ by provider, so map them to your own buckets.

People use the words for the same job. Some vendors call a syntax and domain check validation and a mailbox check verification. Every endpoint on this page checks the mailbox.

They probe the mail server differently and read catch-all domains differently. On our test, one domain got invalid from most verifiers and valid or accept-all from three. Treat a disagreement as risky.

Send one call per address, or use a batch endpoint such as BounceBan's or Scrubby's. Paste the prompt on this page with your list and your agent runs the checks and groups the results.

Run the same list again and compare the verdicts. Doing it on a timer needs scheduled runs, not available yet, so run it by hand before each campaign.

Paste the prompt on this page into your agent. It sets up looot, finds the email verification endpoints, checks the price and runs the cheapest one that fits.

No one publishes an accuracy figure we can check for every verifier. Our own test used two addresses, which shows how each one answers but is too small to rank on.

No. looot bills per call, and nothing runs while your agent is idle.

Keep going

Use case
Email verification API
Send an email address. Read deliverability status and catch-all flag back. Your agent picks the provider, and you pay per call.
Use case
Email finder API
Send a full name and a company domain. Read work email and verification status back. Your agent picks the provider, and you pay per call.
Use case
Domain email search API
Send a company domain. Read email address and full name back. Your agent picks the provider, and you pay per call.
Recipe
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Finds the CEO of each fintech, looks up a work email and drops any address that fails verification.
Recipe
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