Here's how the free tiers looked on 24 September 2026, each read on the vendor's own pricing page. Bouncer, Kickbox and MillionVerifier give 100 credits once, and Emailable gives 250 once. ZeroBounce and emailverify.io renew 100 a month, and Hunter renews 50 credits a month. Verifalia gives 25 a day, and those daily credits expire at the end of each day.
A one-time grant of 250 is gone the first afternoon you test a vendor. A monthly 100 keeps working for you: new signups, a trade-show list, or a batch of replies each month, checked without buying anything. Used every month, that's 1,200 free checks a year.
Paid credits are the ones that should last. Of 17 vendors whose terms could be read on 24 September 2026, 14 never expire them. Kickbox credits expire one year from purchase, and Hunter credits can be used for 12 months. The full list is on do verification credits expire.
Subscription credits follow their own rule. ZapBounce monthly plans cost 15% less than the same credits pay-as-you-go, and unused plan credits roll over while the plan is active. ZeroBounce also rolls subscription credits over while the subscription is active.
Match the free tier to how you'll use it. For a one-off list, the size of the signup grant matters most. For steady signups, a monthly allowance matters more. Past a few hundred addresses you're buying credits anyway, so check that they never expire and that unknown results aren't billed. The free tiers sit side by side on free email verifiers.
Related questions
Which email verifier gives free credits every month?
ZeroBounce, emailverify.io and Hunter renewed a free allowance each month when read on 24 September 2026. ZapBounce gives 100 free checks a month with no card. Most other vendors give a one-time grant, usually 100 credits.
Do free verification credits expire?
Daily allowances do at some vendors: Verifalia's 25 free credits a day expire at the end of each day. Paid credits are a separate pool, and at ZapBounce they never expire.
Do unused subscription credits roll over?
At ZapBounce, yes: unused plan credits roll over while the plan is active, and a monthly plan costs 15% less than pay-as-you-go. Other vendors set their own rules, so read the subscription terms before you commit.
How many free credits do email verifiers give?
The median is 100. Across 16 vendors read on 24 September 2026, most gave 100, Emailable gave 250, Scrubby gave 200 and Verifalia gave 25 a day.