Best email verifier for agencies: 11 tools compared
Quick answer: Agencies verify many client lists, so price at volume and team access matter most. By published price for 1,000,000 verifications a month (checked 27 October 2026): SimpleVerifier Business $99 (5 seats; Agency $249 adds 15 seats and client workspaces), MillionVerifier $449 one-time, DeBounce $690 a month. Several vendors price this volume on request. No accuracy test was run.
By SimpleVerifier Team · Last updated · Prices and limits checked on each vendor’s own site
Which email verifier is best for agencies?
SimpleVerifier Business is $99 a month for 1,000,000 emails at full speed with 5 seats; Agency is $249 for 3,000,000 with 15 seats and client workspaces. Past that volume, lists run slower instead of being cut off. Every address gets a real SMTP mailbox check. 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 1,000,000 addresses in a month: a monthly plan that covers it, otherwise a 1,000,000-credit pack. Vendors that quote this volume on request rank last.
| # | Tool | 1,000,000 a month | Team and client features (its pricing page) | Free limit | Bulk limit | Price | Signup needed | Best for |
|---|---|---|---|---|---|---|---|---|
| 1 | SimpleVerifier | $99 | Business: 5 seats. Agency: 15 seats plus client workspaces | 100 free email checks, one time, with Google sign-in and no card | Past the monthly volume, lists keep running in a slower lane, never cut off | $99/mo Business (1,000,000 at full speed, 5 seats); $249/mo Agency (3,000,000, 15 seats) | Yes (Google sign-in) | Agencies running client lists every month |
| 2 | MillionVerifier | $449 | Not stated on its pricing page | 100 free credits | Limited by credits bought | $449 for 1,000,000 credits (one-time) | Yes (free account) | Very large one-off cleans |
| 3 | DeBounce | $690 | Not stated on its pricing page | 100 free credits | Limited by credits bought | $690/mo for 1,000,000 (monthly); $750 one-time | Yes (free account) | Small and medium lists cleaned once or monthly |
| 4 | Emailable | $1,785 | Not stated on its pricing page | 250 free credits | Limited by credits bought | $1,785/mo for 1,000,000 (subscription); $2,100 one-time | Yes (free account) | Buyers who want credits that never expire |
| 5 | Bouncer | $2,000 | Not stated on its pricing page | 100 free credits | Limited by credits bought | $2,000 for 1,000,000 (one-time) | Yes (free account) | Teams that also want inbox placement and blocklist tests |
| 6 | Kickbox | $2,999 | Agencies solution page listed in its menu | 100 free credits | Limited by credits bought | $2,999 for 1,000,000 (one-time) | Yes (free account) | Senders who also want deliverability consulting |
| 7 | NeverBounce | Not published | Enterprise: unlimited usage across teams (custom price) | Free credits to test a first list (amount not stated) | Up to 10,000 a month on Growth; more priced on request | Enterprise: custom (its page says typically 250,000+ a month); $8 per 1,000 pay as you go | Yes (free account) | Teams that want verification synced into many marketing tools |
| 8 | ZeroBounce | Not published | Agency partner program listed on its site | 100 free validations a month | Limited by credits bought | Over 1,000,000 credits: contact sales; ONE from $99/mo | Yes (free account) | Teams that want a deliverability suite in one plan |
| 9 | EmailListVerify | Not published | Not stated on its pricing page | 100 free credits on signup | Limited by credits bought | Over 1,000,000 a month: volume pricing on request; 250,000 is $346/mo | Yes (free account) | Steady lists of 5,000-10,000 a month |
| 10 | Clearout | Not published | Extra team seats $25 each | 100 free credits (no expiry) | Limited by credits bought | Enterprise (10M+ volume): contact sales | Yes (free account) | Annual buyers who also want an email finder and prospecting |
| 11 | Hunter | Not published | Not stated on its pricing page | 50 credits a month (100 verifications) | Limited by monthly credits | Enterprise: custom; Scale $299/mo covers 50,000 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 pricing page for its price at 1,000,000 verifications and for seats or client separation it lists there. A blank means the pricing page does not say, not that the feature is missing. 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: Agencies running client lists every month
- Agency plan files each list under a client, with history and exports filtered by client
- Business and Agency include a priority lane and API calls (100,000 and 300,000 a month)
- 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. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
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
- Which email verifier is best for an agency with many clients?
- One where the price at your total monthly volume is predictable and teammates can share the account. SimpleVerifier Agency ($249 a month) has 15 seats and client workspaces; Business ($99) has 5 seats. Credit vendors such as MillionVerifier cost less per pass for a one-off million but are billed again on every re-check.
- Do email verifiers offer white label for agencies?
- SimpleVerifier does not. We did not find white label on the pricing pages in this table; ask each vendor directly if you need it.
- How should an agency handle risky addresses for a client?
- Report them separately from valid ones and send them, if at all, in a small test batch. See the agency list verification workflow.
- 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.
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.