KaijuVerifier pricing and alternatives: cached email verification API, POST /api/v1/verify-batch

KaijuVerifier's site llms.txt Best cached email verification API in 2026

50% complete: 3 of the 6 key fields we checkSee the 6 fields

$0.00per 1,000 emails

Plan: Free one of KaijuVerifier's 12 plans

Call: POST /api/v1/verify-batch one of KaijuVerifier's 3 calls

About this item

Stored. KaijuVerifier may skip the mail server and answer from data it keeps. KaijuVerifier doesn't say how old the data is.
3 of the 6 key fields we check. Address, Deliverability, Confidence.
Nothing to pay. You get 100 credits a month, enough for 100 results.
One call. You send emails to POST /api/v1/verify-batch. You can also send use_smtp. The call returns whether each address you send takes mail.
Anyone can get it. Keep data: no limit. Use data: with conditions.

KaijuVerifier: cached email verification API alternatives

We list other providers' plans closest to this plan in price per 1,000 emails. Each plan in the table gives stored data, not live data, like this plan.

	This planKaijuVerifier, free, Free, POST /api/v1/verify-batch	graph8, free	Strale, free, trial credits, POST /v1/do, Bulk Email Validation	APIVerve, free	Botoi, free, Free, POST /v1/disposable-email/check
$ per 1,000	$0.00	$0.00	$0.00	$0.00	$0.00
Completeness	50%	33%	50%	50%	50%
Billing	free	free	free	free	free
Pay	$0	$0	$0	$0	$0
Enough for	100 results a month	not published	not published	10 calls a month	1,000 calls a day
Freshness	stored (DNS valid, MX count, MX providers, MX grade: live)	stored	stored	stored (MX valid, MX record, null MX, can receive mail, has SPF, has DMARC: live)	stored
Who can get it	anyone	verified companies with a work email (personal addresses such as Gmail are not accepted), for internal business purposes	anyone who signs up, one trial credit per email address	anyone 13 or over (under 18 only with the permission of a parent or legal guardian)	anyone 18 or older

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

Address
Deliverability
Confidence
Name, not in the answer
Place, not in the answer
Company, not in the answer

Price
$ per 1,000	$0.00
Billing	free

Aggregators
Aggregators	none

Charges
Per	result
Also pays for	from the same budget: Verify a single email (authenticated) · Submit an async bulk job · Verify a single email with the SMTP probe (authenticated) · Verify a batch synchronously with the SMTP probe · Submit an async bulk job with the SMTP probe

Not found
$ per 1,000	$0.00

Catch-all
$ per 1,000	$0.00

Bounce
Bounce refund	the verification credits in full, when the campaign's hard-bounce rate exceeds 2% on addresses verified as Valid

In their words
Their pitch	Block fake signups, burner accounts, and hard bounces at the edge in 3 lines of code.

Data
Freshness	stored (DNS valid, MX count, MX providers, MX grade: live)
Keep data	no limit
Use data	You agree NOT to use the Service for: Sending SPAM or unsolicited bulk emails, Verifying email lists obtained illegally or without consent, Any activity that violates GDPR, CAN-SPAM, or other data protection laws, Attempting to reverse engineer, hack, or abuse the Service, Reselling or redistributing verification results without authorization

Plan
Pay	$0
You get	100 credits a month
Enough for	100 results a month

Rate limit
Batch	10,000

Speed
Answer	in the call

The call
You send	emails. Optional: use_smtp
Method	POST
Path	/api/v1/verify-batch

About the plan
Plan	Free
Who can get it	anyone

The 28 fields the plan's answer can hold

success, batch ID, batch status, emails checked, valid emails, invalid emails, accuracy, email, normalized email, safe to send, status, reason, confidence, score, grade, did you mean, syntax valid, DNS valid, catch-all, disposable, role address, free provider, MX count, MX providers, MX grade, quota limit, quota used this month, quota remaining