SimpleVerifier Team · Reviewed
Do email verifiers charge for risky, catch-all or unknown results?
It depends on the vendor, and it changes the real price. Some refund unknown results, some bill every address checked. On SimpleVerifier Pro ($39 a month) there is no per-address fee, and duplicates, malformed addresses and addresses it could not check are never counted against Starter's allowance.
Why it matters
On a B2B list a large share of rows can sit at catch-all domains, where no verifier can confirm a mailbox. If the vendor charges a credit for each of those, or charges more than one, the headline price per 1,000 understates the bill.
Three questions to ask a vendor
Check the live billing page or ask support before you buy.
- Is a catch-all or unknown result charged, refunded or charged extra?
- Are duplicates in my file charged?
- If a re-check runs later, is it a new charge?
How SimpleVerifier bills
Pro is flat: the first 100,000 a month run at full speed, then slower, never cut off. Starter ($9 a month) counts each address it checks against a monthly allowance of 2,500. Duplicates, malformed addresses and addresses it could not check are not counted, and every finished list shows what it used. A catch-all result comes back risky, never valid, and is not billed extra.
What SimpleVerifier costs and what it cannot confirm
- 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
- Unlimited email verification on Pro means the first 100,000 checks a month at full speed, then slower, never cut off. It is not instant: checks are paced and capacity is shared by all customers, so small lists finish sooner, a very large list queues and can take days rather than hours, and every job shows its estimated finish time. Bad syntax, dead domains and disposable addresses return at once.
- 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 7 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.
- Privacy and GDPR
- Data processing agreement countersigned on request (/dpa). Results files deleted 7 days after a list is submitted; confirmed results cached by address for 14 days. Lists are not used for marketing, sold or shared. Verification runs on a US server. No GDPR certification is claimed.
- 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 .
Related questions
- Does SimpleVerifier charge extra for catch-all checks?
- No. A catch-all address is one check with a risky result; it is not billed a second time.
- Where can I see what a list used?
- Each finished list shows how many emails it used of your monthly allowance, and how many duplicates, malformed addresses and uncheckable addresses were free.
Sources
- SimpleVerifier pricing
- Email verification pricing index, 1 and 2 October 2026 (SimpleVerifier study, CSV included)
Figures marked as ours come from SimpleVerifier’s own dated tests on made-up addresses, published with their data on the research page. No customer data is used, and we publish no accuracy percentage because we have no independent measurement to back one.
Do it now
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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