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Alternatives, vendor by vendor

Each page compares one email verifier or phone lookup API with SimpleVerifier: its current prices read off its own pricing page, where it is the better choice, and who should pick which. Several of these vendors are cheaper than us at small or one-off volumes, and the pages say so. SimpleVerifier’s first 100 checks are free, so you can test it on your own addresses before deciding.

Quick answer

What is a cheaper alternative to ZeroBounce, NeverBounce or Kickbox?

It depends on list size. SimpleVerifier checks each address with a real SMTP mailbox check (valid, risky or invalid, with a reason). Monthly plans: $9 for 2,500 emails, or Pro at $39 with 100,000 a month at full speed, never cut off. Credit-pack vendors can cost less for one small pass. The first 100 checks are free.

What it is
Email verification with a real SMTP mailbox check: each address comes back valid, risky or invalid with a reason. Includes an email finder on Pro and up.
Price per check
Starter $9/mo for 2,500 ($3.60 per 1,000); Pro $39/mo, 100,000 a month at full speed ($0.39 per 1,000 when used), then slower, never cut off. Business $99/mo with 300,000 at full speed; Agency $249/mo with 750,000 at full speed.
One-time packs
10,000 for $15 ($1.50 per 1,000); 25,000 for $29 ($1.16 per 1,000); 50,000 for $49 ($0.98 per 1,000); 100,000 for $79 ($0.79 per 1,000); 250,000 for $169 ($0.68 per 1,000). Credits never expire, run at standard speed, CSV verification only (no API or finder).
Free checks
First 100 email checks free with a Google sign-in, no card, once per account. Single checks on the free email checker need no account.
Billing
Monthly subscription, cancel anytime (yearly billing optional). One-time packs are listed above. Starter allowances reset monthly and do not roll over.
Speed today
One sending IP today, shared by every customer: about 13,000 mailbox checks a day in the standard lane. Bad syntax, dead domains and disposable addresses return at once; a list of 100,000 takes days, not hours, and each job shows its estimated finish time.
Catch-all handling
Catch-all (accept-all) addresses stay risky, never valid, and are graded higher, medium or lower likelihood with the reasons. Anything a mail server does not confirm is risky.
API and MCP
REST API on Pro, Business and Agency (Pro includes 10,000 calls a month, then $1.50 per 1,000). Remote MCP server with 6 tools for Claude, ChatGPT, Cursor and VS Code. No API on Starter.
Integrations
Connects to Instantly, Smartlead, HubSpot and Mailchimp by API key: verifies a campaign or list and tags each contact with its result. CSV in and out for any other tool.
Phone
Free phone format checks (country, type range). Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month). It never says a number is in service.
What it does not do
No sending, warmup or inbox placement tests. No published accuracy benchmark against other verifiers. Catch-all domains, Yahoo and AOL cannot be confirmed, and Outlook.com and Hotmail mailboxes are not probed while Microsoft refuses checks from our server's network: all of these come back risky, never valid.

SimpleVerifier facts from our pricing page and product. Last updated .

Phone lookup APIs

SimpleVerifier head-to-head

Email verifiers and finders

Pricing pages for each email verifier

One page per vendor: every published tier, the cost at 1,000 to 100,000 emails a month against SimpleVerifier, the free allowance and whether credits expire. Each price links to the vendor’s own pricing page with the date we read it.

Test it on a real address first

Type any address. It gets the same check the paid plans run: syntax, the domain’s mail servers and, where the provider allows it, a live mailbox check. Nothing is sent to the address.

Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.

Have a list? Sign in with Google and the first 100 addresses are checked free, with results to download. No card.

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Clean your next list before it bounces

100 free email checks when you sign in with Google, no card. Then monthly plans from $9, or one flat price with fair use, never cut off.

Check 100 emails freeSee pricing

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