UserCheck pricing and alternatives: cached email verification API

UserCheck'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 emailsThe cheapest of the 344 priced plans is StableEnrich, pay as you go, at $0.005 per 1,000.

Plan: Free one of UserCheck's 6 plans

Call: GET /email/{email} UserCheck's only call

GET /email/{email}Free$0.00 per 1,000

API: Cached email verification API UserCheck's only API

Cached email verification API

About this item

Stored. UserCheck may skip the mail server and answer from data it keeps. UserCheck doesn't say how old the data is.
3 of the 6 key fields we check. Address, Deliverability, Company.
Nothing to pay. You get 1,000 credits a month, enough for 1,000 calls. Unused credits expire at the start of each billing cycle, unused credits do not roll over.
One call. You send email to GET /email/{email}. You can also send include_mx.
Who can get it: anyone aged 16 or over, or the age of consent in their jurisdiction. Keep data: no limit. Use data: with conditions.

UserCheck: 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 planUserCheck, free	EmailDetective, free, Free, POST /emails	Emailit, free	APIVerve, free	Botoi, free, Free, POST /v1/disposable-email/check	Sweep Emails, free
$ per 1,000	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Completeness	50%	83%	67%	50%	50%	33%
Billing	free	free	free	free	free	free
Pay	$0	$0	$0	$0	$0	$0
Enough for	1,000 calls a month	1,000 results a month	600 calls a month	10 calls a month	1,000 calls a day	not published
Freshness	stored	stored	stored (has MX records: live)	stored (MX valid, MX record, null MX, can receive mail, has SPF, has DMARC: live)	stored	stored
Who can get it	anyone aged 16 or over, or the age of consent in their jurisdiction	anyone	entrepreneurs acting in the course of their business	anyone 13 or over (under 18 only with the permission of a parent or legal guardian)	anyone 18 or older	anyone

Every cached email verification API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-23.

Product details

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

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

Price
$ per 1,000	$0.00
Billing	free

Aggregators
Aggregators	none

Charges
Per	call
Also pays for	from the same budget: Domain lookup · Gates decision

Not found
$ per 1,000	$0.00

Catch-all
$ per 1,000	$0.00

In their words
Their pitch	Check new signups, existing users, and imported lists with one API call that returns every signal you need, including disposable email detection that catches domains public blocklists miss.

Data
Freshness	stored
Keep data	no limit
Use data	You may not use our Services: For unlawful purposes, To support spam or fraud, To damage or impair our services, In violation of any applicable laws. You may not resell, sublicense, share, or redistribute UserCheck data or API results to third parties without our written agreement. This includes incorporating our data into products or services used by others.

Plan
Pay	$0
You get	1,000 credits a month
Enough for	1,000 calls a month
Expires	at the start of each billing cycle, unused credits do not roll over

Rate limit
Per second	1
Batch	1

Speed
Answer	in the call

The call
You send	email. Optional: include_mx
Method	GET
Path	/email/{email}

About the plan
Plan	Free
Who can get it	anyone aged 16 or over, or the age of consent in their jurisdiction

The 18 fields the plan's answer can hold

status code, email address, normalized email address, domain, domain age in days, has MX records, MX records, MX providers, SPF posture, DMARC policy, disposable, public domain, relay domain, free subdomain, alias, role account, spam, did you mean