Buyer guide · SimpleVerifier Team
What it costs to verify 500,000 emails a month
Verifying 500,000 email addresses every month on SimpleVerifier costs $249 a month on Agency. Agency runs the first 750,000 checks a month at full speed, then slower, never cut off, so 500,000 a month is inside its full-speed volume. Credit-based vendors price a monthly 500k volume as a tier or as a pack bought again each month; their published figures are in the table below, including any that cost less.
A monthly volume is a different purchase from a one-off clean. A credit pack is often cheapest for one pass; for 500,000 every month, compare what twelve passes cost. For a single list of this size, see the one-off cost pages.
500,000 verifications every month, by vendor
| Vendor | 500,000 a month |
|---|---|
| SimpleVerifier Agency | $249 |
| VeriMails | $150 |
| BillionVerify | $160 |
| Emails Checker | $165 |
| Listclean | $175 |
| MyEmailVerifier | $219 |
| Proofy | $237.15 |
| Bulk Email Checker | $279.95 |
| MillionVerifier | $299 |
| Bouncify | $299 |
| Verimail | $299 |
| Bounceless | $349 |
| Truelist | $350 |
| MailboxValidator | $399.95 |
| DeBounce | $450 |
| NeverBounce | $499 |
| Reoon | $522 |
| Captain Verify | $531 |
| Email List Validation | $599 |
| SafetyMails | $685 |
| EmailVerify.io | $699 |
| Mailfloss | $729 |
| Clearalist | $750 |
| BounceBan | $850 |
| Clearout | $900 |
| QuickEmailVerification | $900 |
| EmailListVerify | $930 |
| Verifalia | $990 |
| Bouncer | $1,000 |
| Xverify | $1,000 |
| Emailable | $1,147.50 |
| Email Hippo | $1,247.90 |
| Email Verifier API | $1,499.95 |
| MailerCheck | $1,500 |
| Voila Norbert | $1,500 |
| ZeroBounce | $1,699 |
| Kickbox | $1,800 |
| Scrubby | $4,000 |
Lowest published route for 500,000 checks every month, read from each vendor's pricing page; pay-as-you-go vendors are priced as buying the covering pack each month. Ours is Agency: the first 750,000 checks a month at full speed, then slower, never cut off. "Not published" means the vendor's page did not price this volume. Vendor prices read 12 Oct 2026 to 5 Nov 2026. Each vendor links to its comparison page, which records the date its prices were read. Check their site for current pricing before you buy.
SimpleVerifier facts: prices, packs and limits
- 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.
- 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 .
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.
By continuing you agree to our Terms and Privacy Policy.
How long it takes
Mailbox checks are paced, because mail servers slow down or block verifiers that probe too fast, and the daily check capacity is shared between customers. Addresses that need no mailbox check, such as broken syntax, dead domains and disposable addresses, come back at once. The rest run in a queue, and the job card shows an estimated finish time. At the average shared pace, 500,000 rows take about 11-12 days in total; spread across a month as lists arrive, that is rarely a wait. When the queue is busy, a list past its plan's full-speed volume still gets at least 2,000 rows a day.
A CSV holds up to 100,000 rows, and the API (300,000 calls a month included on Agency) checks sign-ups one at a time.
Common questions
- How much does it cost to verify 500,000 emails a month?
- $249 a month on SimpleVerifier Agency: the first 750,000 checks a month at full speed, then slower, never cut off. Other vendors' published monthly prices for 500,000 are in the table on this page.
- Which plan do I need for 500,000 emails a month?
- Agency, whose full-speed volume is 750,000 a month.
- Is there a contract?
- No. Plans are monthly or yearly and cancel from your account. The first 100 checks are free with a Google sign-in, no card.
Verify 500k a month on Agency
Agency is $249 a month and never cuts you off: the first 750,000 emails a month run at full speed, then big lists run slower. CSV uploads, the API (300,000 calls a month, then $1.00 per 1,000), the Google Sheets add-on and the email finder are included, and you can cancel any time. For smaller volumes, Starter is $9 a month for 2,500 emails a month.
The first 100 email checks are free with a Google sign-in, no card, on the same engine the paid plans use.