Best email verifier for Clay: 11 options compared
Quick answer: SimpleVerifier has no native Clay provider; you add an HTTP API column with your key (API comes with Pro, $29.99 a month, and up) or upload a CSV export from $19 a month for 10,000. Of the 9 other verifiers whose sites we could read, MillionVerifier, ZeroBounce and Hunter list an integration with Clay on their own site. NeverBounce's site blocked our automated check that day, so its column is unconfirmed. Clay calls outside tools per row, so per-call price and speed matter more than a file upload. Prices and integrations checked 27 October 2026.
By SimpleVerifier Team · Last updated · Prices and limits checked on each vendor’s own site
Which email verifier works with Clay?
SimpleVerifier has no native Clay provider. Add an HTTP API column that calls its verify endpoint with your key, and each row gets a real SMTP mailbox check returning valid, risky or invalid. API access starts on Pro at $29.99 a month. A CSV export works on every plan. 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); Growth $19/mo for 10,000 ($1.90 per 1,000); Pro $29.99/mo, 100,000 a month at full speed ($0.30 per 1,000 when used), then slower, never cut off. Business $99/mo, Agency $249/mo. |
| 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). No one-time credit packs. Starter and Growth allowances reset monthly and do not roll over. |
| 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 or Growth. |
| 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 are a $20/mo add-on (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. Outlook.com, Hotmail and iCloud mailboxes are not probed and come back risky. |
SimpleVerifier facts from our pricing page and product. Last updated .
How do these tools compare?
Ranked by the lowest published price to verify 10,000 addresses a month (a monthly plan where one exists, otherwise a 10,000-credit pack). The Clay column shows whether the vendor's own site lists an integration.
| # | Tool | 10,000 a month | Clay connection | Free limit | Bulk limit | Price | Signup needed | Best for |
|---|---|---|---|---|---|---|---|---|
| 1 | SimpleVerifier | $19 | No native provider: an HTTP API column with your key (Pro and up), or a CSV export | 100 free email checks, one time, with Google sign-in and no card | CSV up to 100,000 rows; Pro runs 100,000 a month at full speed, then slower, never cut off | $19/mo for 10,000 (Growth); $9/mo for 2,500 (Starter); $29.99/mo Pro | Yes (Google sign-in) | Lists checked every month, re-checks, and campaign tools it connects to |
| 2 | DeBounce | $23 | No Clay integration found on its site; export a CSV | 100 free credits | Limited by credits bought | $23/mo for 10,000 (monthly); $25 one-time | Yes (free account) | Small and medium lists cleaned once or monthly |
| 3 | EmailListVerify | $25 | No Clay integration found on its site; export a CSV | 100 free credits on signup | Limited by credits bought | $25/mo for 10,000; $27 one-time | Yes (free account) | Steady lists of 5,000-10,000 a month |
| 4 | MillionVerifier | $39 | Yes: Clay guide in its help pages | 100 free credits | Limited by credits bought | $39 for 10,000 credits (one-time) | Yes (free account) | Very large one-off cleans |
| 5 | NeverBounce | $49 | Not confirmed: its site blocked our automated check | Free credits to test a first list (amount not stated) | Up to 10,000 a month on Growth; more priced on request | $49/mo for up to 10,000 (Growth); $8 per 1,000 pay as you go | Yes (free account) | Teams that want verification synced into many marketing tools |
| 6 | Emailable | $51 | No Clay integration found on its site; export a CSV | 250 free credits | Limited by credits bought | $51/mo for 10,000 (subscription); $60 one-time | Yes (free account) | Buyers who want credits that never expire |
| 7 | Clearout | $58 | No Clay integration found on its site; export a CSV | 100 free credits (no expiry) | Limited by credits bought | $58/mo for 10,000 billed monthly; $32/mo billed yearly | Yes (free account) | Annual buyers who also want an email finder and prospecting |
| 8 | Bouncer | $60 | No Clay integration found on its site; export a CSV | 100 free credits | Limited by credits bought | $60 for 10,000 (one-time); its subscription price did not load for us | Yes (free account) | Teams that also want inbox placement and blocklist tests |
| 9 | Kickbox | $70 | No Clay integration found on its site; export a CSV | 100 free credits | Limited by credits bought | $70 for 10,000 (one-time) | Yes (free account) | Senders who also want deliverability consulting |
| 10 | ZeroBounce | $99 | Yes: Clay integration page | 100 free validations a month | Limited by credits bought | $99/mo for 10,000 (ZeroBounce ONE); pay as you go from $39 for 2,000 | Yes (free account) | Teams that want a deliverability suite in one plan |
| 11 | Hunter | $149 | Hunter in Clay (its integrations page) | 50 credits a month (100 verifications) | Limited by monthly credits | $149/mo (Growth: 10,000 credits = 20,000 verifications) | Yes (free account) | Outreach teams that find, verify and send in one tool |
How we compared
On 27 October 2026 we read each vendor's integrations page or help center for Clay (prices were read the same day), and list those pages under each tool. "None found" means we did not find one that day, not that it is impossible: most tools also have an API or Zapier. NeverBounce returned a bot check instead of its page, so that row says "not confirmed". 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. 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: No one-time pack: every plan is a monthly subscription you cancel
- Watch out: Starter and Growth allowances reset monthly and do not roll over; no API on those two
Checked October 27, 2026: SimpleVerifier pricing · SimpleVerifier integrations
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. 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. 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 · MillionVerifier help: verify in Clay
5. 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
6. 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
7. Clearout
Best for: Annual buyers who also want an email finder and prospecting
- Unused plan credits roll over, by its pricing page
- Verification, finder and prospecting share one balance
- Watch out: The monthly-billed price for 10,000 is well above the yearly rate
Checked October 27, 2026: Clearout pricing · Clearout integrations
8. Bouncer
Best for: Teams that also want inbox placement and blocklist tests
- Credits never expire
- Deliverability Kit (inbox placement, blocklist tests) from $25 a month
- Watch out: The Deliverability Kit is a separate plan from verification
Checked October 27, 2026: Bouncer pricing · Bouncer integrations
9. Kickbox
Best for: Senders who also want deliverability consulting
- Unknown results are refunded as credits, by its pricing page
- Watch out: No subscription; every list is a per-email purchase
Checked October 27, 2026: Kickbox pricing · Kickbox integrations
10. ZeroBounce
Best for: Teams that want a deliverability suite in one plan
- The free allowance refills every month
- ONE bundles warmup, inbox tests and blacklist monitoring
- Watch out: Pay as you go starts at $39 for 2,000 credits
Checked October 27, 2026: ZeroBounce pricing · ZeroBounce integrations
11. Hunter
Best for: Outreach teams that find, verify and send in one tool
- Email finder, campaigns and verification in one product
- Watch out: The $49 Starter plan covers 4,000 verifications, so 10,000 a month needs Growth
Checked October 27, 2026: Hunter pricing · Hunter integrations
Common questions
- How do I verify emails in Clay with SimpleVerifier?
- Add an HTTP API column, set it to GET https://simpleverifier.com/api/v1/verify with your email column as the email parameter, and send your key as a Bearer Authorization header. Run a few rows first, then filter on the status field. The Clay setup guide has every step. API access comes with Pro and higher plans.
- How do I verify Clay contacts with SimpleVerifier?
- There is no Clay connector, so it is a CSV round trip. Export: In Clay, open the table you want to export. Filter the view down to the rows you want and make sure the email column is visible. Click Actions > Export > Download CSV. Once processing finishes, the file downloads. Earlier exports are listed under Available Exports. Upload that file to SimpleVerifier as it is; 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 Clay. The export steps follow Clay's help article; the full Clay export guide has the details.
- Which email verifiers work with Clay?
- On 27 October 2026: ZeroBounce had a Clay integration page, MillionVerifier's help pages had a Clay guide, and Hunter listed Clay on its integrations page. NeverBounce's site blocked our check. SimpleVerifier works through Clay's HTTP API column, not a native provider.
- 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.
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.
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