Best pay-as-you-go email verifiers
Pay-as-you-go suits lists you clean a few times a year. Eight verifiers that sell credits without a subscription, ranked on entry pack, expiry and billing.
How this was compared
Disclosure: ZapBounce is our product. Figures were read from each vendor's own pages in September 2026, and the criteria below were applied to every entry, ours included.
The short version
- Pay-as-you-go without a subscription: credit packs you can buy once, read on each vendor's own pricing page in September 2026.
- The smallest pack and its price, since a minimum purchase decides what a small clean really costs.
- Credit expiry, because a pack that expires turns a quarterly clean into a yearly fee.
- What spends a credit: unknown results and duplicate rows.
- Disclosure: ZapBounce is our product, and the same criteria were applied to it.
At a glance
| 10,000 addresses | Credit expiry | Bills unknowns | |
|---|---|---|---|
| ZapBounce | $25 | Credits never expire | No |
| MillionVerifier | Not shown in the tiers we could read | Credits never expire, stated twice on their page | No |
| Bouncer | $60 | Credits never expire | No |
| EmailListVerify | $27 | Credits never expire | Not stated |
| Proofy | $18 | Credits never expire, and survive cancellation | No |
| Reoon | $11.90 | Instant credits never expire | Not stated |
| Emailable | $0.0076 an address at the 5,000 entry, 15% off on a subscription | Credits never expire | No |
| Kickbox | $70 | Credits expire one year from purchase | No |
Vendor figures read from their own pricing pages in September 2026. Confirm before purchase, because prices move.
The ranking
Best first, with the situation each one fits.
ZapBounce
Disclosure: ZapBounce is our product. Packs run from 1,000 checks for $5 through 10,000 for $25, 100,000 for $139 and 1,000,000 for $949, all published on one page. Credits never expire, and 100 free checks renew every month with no card.
- Best for:
- Anyone who cleans a list before a launch, a season or a campaign and wants no plan to cancel afterwards. Every pack is on pricing, and the cost calculator prices your list size.
MillionVerifier
MillionVerifier sells pay-as-you-go only, with credits that never expire and 100 free credits with no card.
- Best for:
- Very large lists, with 50,000 checks at $89 and 1,000,000 at $449 (read 24 September 2026).
- Less suited to:
- Seeing small-pack prices at a glance, since its smaller tiers sit behind a See all packages control on its homepage.
Bouncer
Bouncer publishes a flat pay-as-you-go ladder, never charges for duplicates or unknowns, and keeps credits for good.
- Best for:
- Lists with risky domains to flag with its toxicity check.
- Less suited to:
- Large lists on a tight budget, where its 100,000 tier costs $400.
EmailListVerify
EmailListVerify sells packs from 1,000 checks at $5 to 100,000 at $186, with credits that never expire.
- Best for:
- Small and mid-sized lists bought in simple packs.
- Less suited to:
- Budgeting on unknown rows, since its pricing page does not state whether unknowns are billed.
Proofy
Proofy sells cheap pay-as-you-go packs whose credits survive cancellation, and never charges for unknowns or duplicates.
- Best for:
- Buyers who might close the account and come back later.
- Less suited to:
- Free testing, since new users get a $5 trial instead of free credits.
Reoon
Reoon's instant credits never expire, with 10,000 checks at $11.90 and a daily free allowance of 20.
- Best for:
- Senders who want a 0 to 100 score on each address.
- Less suited to:
- Budgeting on unknown rows, since its pricing page does not state whether unknowns are billed.
Emailable
Emailable sells pay-as-you-go credits that never expire and refunds duplicates and unknowns.
- Best for:
- Lists over 5,000 addresses.
- Less suited to:
- Small cleans, since purchases start at the 5,000-credit minimum for $38.
Kickbox
Kickbox sells pay-as-you-go packs from 500 checks for $5, and charges only for definitive results.
- Best for:
- Teams who want the Sendex quality score on each address.
- Less suited to:
- Occasional cleans, since credits expire one year from purchase (read 24 September 2026).
Why ZapBounce ranks first
How to choose
- Minimum purchase: Emailable starts at 5,000 credits. ZapBounce and EmailListVerify start at 1,000 checks for $5, and Kickbox sells 500 for $5.
- Expiry: Kickbox credits expire one year from purchase (read 24 September 2026). ZapBounce, MillionVerifier, Bouncer and the rest of this list keep credits for good.
- Unknown rows: ZapBounce, Bouncer, Proofy, Emailable and Kickbox don't bill them. Reoon's and EmailListVerify's pricing pages don't state their rule.
- Free checks between packs: MillionVerifier gives 100 free credits once, and Reoon 20 a day. ZapBounce renews 100 free checks every month with no card, and bulk verification takes files of any size from the same balance.
Questions people ask
What is the best pay-as-you-go email verification service with no subscription?
On these criteria ZapBounce ranks first: packs from $5 for 1,000 with no minimum, credits that never expire, and unknowns and duplicates never billed. MillionVerifier, Bouncer and Emailable also sell credits that never expire.
Is pay-as-you-go cheaper than a subscription for email verification?
For lists cleaned a few times a year, usually yes, because you pay only when you clean. For steady volume, the monthly plan costs 15% less than the same credits bought one pack at a time.
Do pay-as-you-go verification credits expire?
It depends on the vendor. ZapBounce, MillionVerifier, Bouncer, Emailable and EmailListVerify credits never expire, while Kickbox credits expire one year from purchase, read on their own sites in September 2026.
How much does it cost to verify 10,000 emails on pay-as-you-go?
ZapBounce charges $25 for 10,000 checks. Among vendors read in September 2026, Bouncer charges $60, EmailListVerify $27 and Kickbox $70 for the same volume.
Run the same sample through two of them
100 free checks a month, no card. Compare how many addresses each one declined to judge, which matters more than either accuracy claim.