Email validation · Cheapest email verification API
Pricing comparison
The cheapest email verification API at 50,000 validations a month.
Every row is the provider's own published list price for 50,000 verifications a month. Credit packs are marked, because a one-time pack is not the same product as a monthly plan. Last reviewed: 2026-09-03.
50,000 validations
$49.99/mo
$0.001 per extra validation. 100 validations a month free, no credit card.
No credit card required.
What is the cheapest email verification API?
Cheapest first. Credit packs are marked, because a pack is not a monthly plan and the per-validation number is the only fair comparison.
| Provider | Price | Per validation | Billing |
|---|---|---|---|
| Trueguard | $49.99 / month | $0.001 | Monthly plan |
| DeBounce | $69.00 / month | $0.00138 | Monthly plan |
| MillionVerifier | $89 | $0.00178 | Credit pack, no monthly plan |
| NeverBounce | $99 / month | $0.00198 | Monthly plan |
| Bouncer | $200 / month | $0.004 | Monthly plan |
| Emailable | $208.25 / month | $0.00417 | Monthly plan |
| Kickbox | $275 | $0.0055 | Credit pack, no monthly plan |
| Clearout | $292 / month | $0.00584 | Monthly plan |
| ZeroBounce | $379 / month | $0.00758 | Monthly plan |
Prices are the published list rate for 50,000 verifications a month, checked against each provider's own pricing page.
Why the cheapest sticker price is not always the cheapest bill.
Credit multipliers
Some providers charge more credits per email at higher quality levels: one credit at standard, two or four at the top tier. The advertised price assumes the cheapest tier, so the bill scales with the setting you actually need.
Packs are not plans
A credit pack is a one-time purchase. It looks cheaper than a monthly plan on the sticker, but it does not refill, so continuous checking at signup means buying again every month at the same price.
Expiring daily credits
Some free and subscription tiers reset at midnight, so unused credits vanish rather than accumulating. That matters when your volume is lumpy: a spike day is throttled while the quiet days are wasted.
Overage pricing
Check what a validation costs once you pass the quota. If overage is priced above the in-plan rate, a busy month turns into an unpredictable invoice.
$0.001
Per validation on the Standard plan, and the same rate for overage.
Sub-1s
Median response time, so it fits inside a signup form submit.
100
Free validations a month on the production endpoint, no credit card.
Which one should you pick?
Choose Trueguard
You need recurring volume every month at a predictable price.
You want the per-validation rate to stay flat instead of being multiplied by a quality tier.
You call the API from your own backend at signup or before a send.
You would rather start on a free tier than talk to sales.
Look elsewhere if
You have one very large list to clean once: at high prepaid volume, a credit pack may cost less in total.
You need a drag-and-drop bulk upload UI rather than an API.
You require an official SDK for your language.
Spam-trap detection is a hard requirement.
The three Trueguard plans.
No credit multipliers, and overage at the same rate as the plan.
Standard
Popular$49.99 / month
50,000 validations / month
Overage: $0.001 per validation
Get your API keyFrequently asked questions
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What is the cheapest email verification API?
At 50,000 validations a month, Trueguard at $49.99 works out at $0.001 per validation, the lowest published rate in the table above. Below that volume the free tier covers 100 a month at no cost.
Why is per-validation the number to compare?
Because providers package volume differently. Monthly plans, credit packs and quality multipliers all change the sticker price without changing what you get back, so price divided by validations is the only comparable figure.
Does cheap mean less accurate?
The checks are the same shape everywhere: syntax, MX, SMTP, catch-all, disposable, role. Trueguard's false positive rate is under 1% with a sub-second median response, and the free tier runs the production endpoint so you can measure it yourself.
What happens if I go over the quota?
Overage is billed at $0.001 per validation through Stripe, the same as the in-plan rate. There is no penalty tier and no multiplier.
Is there a cheaper option for one-off list cleaning?
At high prepaid volume, possibly. MillionVerifier sells 1,000,000 verifications for $449, roughly $0.000449 each, and DeBounce's page shows 500,000 credits at $450.00, or $0.0009 each. Both are below Trueguard's standard $0.001. Trueguard is built for recurring checks.
Do you need a credit card to start?
No. 100 validations a month, no card, no trial expiry, on the production endpoint with the same response shape as the paid plan.
Start at $0, move to $49.99 when you outgrow it.
100 validations a month, free, no card. Run your own list through it and compare the answers before you pay anyone.
Get your free API keyNo credit card required.
