Best email verifier for Cognism: 7 options compared

Which email verifier should I use for Cognism?

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 October 31, 2026.

Which one should you pick?

• Pick Cognism's data validation if you only send to contacts you revealed in Cognism recently.

  Skip Cognism's data validation if the list is older or mixed with other sources, or you want each address checked at the mailbox before a send.

• Pick DeBounce if you want a low price on a one-off clean of a small or medium list, with pay-as-you-go credits that never expire.

• Pick EmailListVerify if you verify a steady 5,000 to 10,000 addresses a month ($16 a month for 5,000), or want pay-as-you-go credits that never expire.

• Pick SimpleVerifier if you verify or re-check lists every month and want one flat monthly price instead of credits, with catch-all addresses kept risky rather than marked valid.

  Skip SimpleVerifier if you want the lowest price for one small list, where another vendor's pack can cost less (cost by list size); you need your data processed only inside the EU (our service providers process data in several countries, including the US); or your list is mostly Outlook.com, Hotmail or Live addresses, which Microsoft currently won't let us confirm, so they come back risky (why).

• Pick MillionVerifier if you clean a very large list once in a while: 1,000,000 credits are $449 one-time, never expire, and there is no subscription to cancel.

• Pick NeverBounce if you want verification synced inside many marketing tools: its pricing page lists 80+ integrations.

• Pick Emailable if you want 250 free credits to test with and credits that never expire.

How we compared

On 3 November 2026 we read Cognism's own help pages for any built-in email verification and list them under its row. We did not re-check the other verifiers' sites for a Cognism integration this time, so their column says "not checked"; any of them can take a CSV export, and their prices are the ones read on 27 October 2026. To keep the table short it shows the lowest-priced ones and leaves out Clearout, Bouncer, Kickbox, ZeroBounce and Hunter, which are in the main roundup. We did not run an accuracy benchmark, so nothing here ranks accuracy: test a shortlist on a sample of your own list, including addresses you know are dead.

Each tool in a few lines

1. 1. Cognism's data validation

   Best for: Teams whose leads all come from Cognism

   • Its FAQ describes its own data validation, including a research team that manually verifies the most requested contacts
   • Watch out: The FAQ does not describe a check you can run on a list of your own

   Checked November 3, 2026: Cognism FAQ

2. 2. DeBounce

   Best for: Small and medium lists cleaned once or monthly

   • Pay-as-you-go credits never expire
   • 100,000 credits are $135 one-time
   • Watch out: Every pass over the same list is billed again

   Checked October 27, 2026: DeBounce pricing · DeBounce integrations

3. 3. EmailListVerify

   Best for: Steady lists of 5,000-10,000 a month

   • A 5,000-a-month plan is $16
   • Pay-as-you-go credits never expire
   • Watch out: The page shows euros in some regions while its structured data lists US dollars

   Checked October 27, 2026: EmailListVerify pricing · EmailListVerify integrations

4. 4. SimpleVerifier(our tool)

   Best for: Lists checked every month, re-checks, and campaign tools it connects to

   • Connects to Instantly, Smartlead, HubSpot and Mailchimp by API key and tags each contact valid, risky or invalid
   • Catch-all addresses stay risky, never valid
   • Watch out: One-time packs run at standard speed and cover CSV verification only (no API or finder)
   • Watch out: Starter's allowance resets monthly and does not roll over, and has no API; 10,000 a month needs Pro

   Checked October 27, 2026: SimpleVerifier pricing · SimpleVerifier integrations

5. 5. MillionVerifier

   Best for: Very large one-off cleans

   • 1,000,000 credits are $449 and never expire
   • No subscription to cancel
   • Watch out: No monthly plan, so a monthly re-check is a new purchase each time

   Checked October 27, 2026: MillionVerifier pricing (all packages) · MillionVerifier help: integrations

6. 6. NeverBounce

   Best for: Teams that want verification synced into many marketing tools

   • Its pricing page says it works with Zapier, n8n, HubSpot, Mailchimp and 80+ integrations
   • Watch out: Pay-as-you-go credits expire 12 months after purchase

   Checked October 27, 2026: NeverBounce pricing

7. 7. Emailable

   Best for: Buyers who want credits that never expire

   • 250 free credits on signup
   • The subscription saves 15% and can be cancelled
   • Watch out: Per-credit pricing: 100,000 a month is $357 on the subscription

   Checked October 27, 2026: Emailable pricing · Emailable integrations

Common questions

Are Cognism emails verified?

Cognism's FAQ describes proprietary data validation, including a research team that manually verifies customers' most requested contacts. It does not describe a check you can run on a list of your own, so a downloaded file is as fresh as the day it was revealed.

How do I verify Cognism contacts with SimpleVerifier?

There is no Cognism connector, so it is a CSV round trip. Export: open Lists, open the list, select the revealed contacts and click Download CSV. Run the file through the free Cognism export to email list tool in your browser, then upload the clean list to SimpleVerifier; the email column is found automatically. You get three files, valid, risky and invalid, each with every original column, so import the valid file back into Cognism. The export steps follow Cognism's help article.

Can I verify new contacts automatically instead of exporting?

Yes, with the SimpleVerifier API, which comes with Pro and higher plans. Call it from Zapier, Make or n8n when a contact is created, and branch on the status field: valid, risky or invalid. There is no packaged SimpleVerifier app in those directories yet; the guides use their HTTP or webhook steps.

Is the cheapest verifier the most accurate?

We did not run an accuracy benchmark, so nothing here ranks accuracy: test a shortlist on a sample of your own list, including addresses you know are dead.