BillionVerify pricing and alternatives: email verification API, POST /verify/file

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

33% complete: 2 of the 6 key fields we checkSee the 6 fields

$1.00per 1,000 emailsHalf of the 1,712 plans we rank by price cost $2.632 per 1,000 or less. This plan costs less than 77% of the 1,712 plans.The cheapest plan we rank by price is treg, top-up from $10, at $0.00 per 1,000.

Plan: Starter one of BillionVerify's 18 plans

Call: POST /verify/file one of BillionVerify's 3 calls

API: Email verification API BillionVerify's only API

Email verification API

About this item

Live. The call checks the email when you make it.
2 of the 6 key fields we check. Address, Deliverability.
A pack you buy once. You pay $20 for 20,000 credits, enough for 20,000 results. Credits never expire.
One call. You send file to POST /verify/file. You can also send check_smtp, email_column and preserve_original. The call returns a job. You fetch the answer once the job is done. Or the provider sends the answer to your webhook.
Who can get it: with conditions. Keep data: no limit. Use data: with conditions.

BillionVerify: 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 live data.

	This planBillionVerify, $20 pack, Starter, POST /verify/file	Verimail, $100 pack	OneShot, pay as you go	DeBounce, top-up from $200, 200K credits, GET /v1/, Single email validation	NeuralVerge, $50 monthly
$ per 1,000	$1.00	$1.00	$1.00	$1.00	$1.00
Completeness	33%	50%	33%	50%	50%
Billing	pay first	pay first	pay as you go	pay first	monthly
Pay	$20	$100	per call	$200	$50
Enough for	20,000 results	100,000 calls	as many as you pay for	200,000 calls	50,000 calls a month
Freshness	live	live	live	live	live
Who can get it	anyone at least 18 years old and legally able to enter into a contract, for their internal business purposes only	businesses and professionals, not directed at anyone under 18	anyone, consumer or business, not in a country under a U.S. government embargo or on a U.S. restricted-party list, paying each call from a wallet on Base in USDC or ETH	anyone over 18	business and professional use, 18 or over

Every 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 2026-10-20.

Product details

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

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

Price
$ per 1,000	$1.00
Billing	pay first

Aggregators
Aggregators	none

Charges
Repeat free	24 hours
Per	result
Also pays for	from the same budget: Single Email Verification · Batch Email Verification · Email Finder · Bulk Email Finder · Company Search

Not found
$ per 1,000	$0.00

Catch-all
$ per 1,000	$1.00

In their words
Their pitch	POST /verify/file — submit CSV or Excel files to the API for background processing. Results are delivered via webhook callback when the API job completes.

Data
Freshness	live
Keep data	no limit
Use data	You may not use the Service to: Violate anti-spam, privacy, consumer protection, or data protection laws. Submit data you do not have the lawful right to process. Abuse promotional offers, bypass rate limits, probe our systems, or attempt unauthorized access. Reverse engineer, copy, resell, sublicense, or build a competing service using the Service except as expressly permitted by us in writing. [...] Subject to these Terms, we grant you a limited, revocable, non-exclusive, non-transferable right to use the Service for your internal business purposes.

Plan
Pay	$20
You get	20,000 credits
Enough for	20,000 results
Expires	never

Rate limit
Per second	5

Speed
Answer	by polling or webhook

The call
You send	file. Optional: check_smtp, email_column, preserve_original
Method	POST
Path	/verify/file

About the plan
Plan	Starter
Who can get it	anyone at least 18 years old and legally able to enter into a contract, for their internal business purposes only

The 27 fields the plan's answer can hold

task ID, file name, status, unique emails, total rows, progress, email progress, chunk progress, progress source, total emails, processed emails, valid emails, invalid emails, unknown emails, role emails, catch-all emails, risky emails, disposable emails, credits used, download URL, direct download URL, direct download expires at, started at, completed at, total chunks, completed chunks, failed chunks