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DeBounce vs MillionVerifier, and the better choice

How DeBounce and MillionVerifier compare on what you get per credit, and why RocketVerifier beats both on cost per usable result, catch-all verdicts, speed and AI tooling.

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DeBounce, MillionVerifier and RocketVerifier

Each vendor's terms from its own published pages, with RocketVerifier alongside.

DeBounce, MillionVerifier and RocketVerifier compared
Compare DeBounce MillionVerifier RocketVerifier
Unknown results Unknown results are free and duplicates are not billed. Its terms call free unknowns a discretionary goodwill programme: for bulk files, credits may be deducted and returned as promotional credits. Never charged, and duplicates in a list are free too
Bounce refunds A deliverability-rate guarantee, compensated in verification credits when the rate falls short. A money-back guarantee you claim if more than 4% of OK addresses hard-bounce, for file uploads mailed within 7 days. Automatic: every hard bounce on a deliverable result is refunded within 30 days when you connect SendGrid, Mailgun, Amazon SES or Postmark
Catch-all addresses Catch-all validation is a separate step billed at 10 credits per validation, against 1 credit for standard validation. Catch-all verification is included; unresolved addresses are labelled risky. Every one scored 0 to 100 with a send_safe, send_with_caution or avoid verdict, in the standard 1 credit
MCP server for AI agents No MCP server is listed on DeBounce's site. No MCP server is listed on MillionVerifier's site. Hosted MCP server for Claude, ChatGPT, Cursor and any MCP client, plus a local npm package
OAuth for third-party apps No OAuth app platform for third-party developers is published on DeBounce's site. No OAuth app platform for third-party developers is published on MillionVerifier's site. RocketVerifier Connect: apps connect in one click and verify on the user's own credits
Free credits 100 free credits, no card required. 100 free credits on signup. 100 free credits instantly, no card required
Credit expiry Pay-as-you-go credits never expire; monthly-plan rollover is not stated. Credits never expire. Pay-as-you-go credits never expire, and plan credits roll over
Developer API Single and bulk APIs, one bulk job at a time per account; no official SDKs. Single and bulk APIs with test keys and code samples; no official SDK or webhooks documented. REST and bulk APIs, signed webhooks, Node.js and Python SDKs, a CLI and free sandbox keys
Form protection A JavaScript widget, limited to 20 validations per visitor per day. No form widget; real-time form checks are built on the API. RocketShield, included on every plan
SPF, DKIM and DMARC No SPF, DKIM or DMARC monitoring is listed. No SPF, DKIM or DMARC tools are listed. Free lookups plus deliverability monitors with alerts, included

In short

DeBounce vs MillionVerifier at a glance

What each one is, and how RocketVerifier compares head to head.

DeBounce

DeBounce is an email validation tool for list cleaning, real-time signup screening and a separately billed catch-all validation step.

RocketVerifier vs DeBounce

MillionVerifier

MillionVerifier is a bulk email verification service with a real-time API, sold on pay-as-you-go credits.

RocketVerifier vs MillionVerifier

The better choice

Why RocketVerifier beats DeBounce and MillionVerifier

99.5% accuracy, the fastest real-time API, a reason behind every result and every feature on every plan.

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  • Pay only for usable results

    Unknown results and duplicate addresses are never charged. Connect your sending platform and every hard bounce on an address we marked deliverable is refunded automatically.

  • A verdict on every catch-all

    Accept-all addresses get send_safe, send_with_caution or avoid, included in the standard 1 credit.

  • The fastest real-time API

    Typically under 400ms, 1 to 3 seconds with a live SMTP check, and up to 100,000 emails per hour in bulk.

  • Built for AI agents

    A hosted MCP server for Claude, ChatGPT and Cursor, plus RocketVerifier Connect OAuth for third-party apps.

  • Credits never expire

    Pay-as-you-go credits stay until you use them. Monthly and yearly plans roll unused credits over.

  • Integrations included

    HubSpot, Salesforce, Mailchimp, Instantly, Smartlead, Zapier, Make, n8n and more on every plan.

FAQ

DeBounce vs MillionVerifier FAQ

What is the difference between DeBounce and MillionVerifier?

DeBounce is an email validation tool for list cleaning, real-time signup screening and a separately billed catch-all validation step. MillionVerifier is a bulk email verification service with a real-time API, sold on pay-as-you-go credits.

Do DeBounce and MillionVerifier charge for unknown results?

DeBounce: Unknown results are free and duplicates are not billed. MillionVerifier: Its terms call free unknowns a discretionary goodwill programme: for bulk files, credits may be deducted and returned as promotional credits. RocketVerifier never charges for unknown results or duplicates.

How do DeBounce and MillionVerifier handle catch-all addresses?

DeBounce: Catch-all validation is a separate step billed at 10 credits per validation, against 1 credit for standard validation. MillionVerifier: Catch-all verification is included; unresolved addresses are labelled risky. RocketVerifier scores every catch-all address and returns send_safe, send_with_caution or avoid in the standard 1 credit.

What is the best alternative to DeBounce and MillionVerifier?

RocketVerifier. It verifies with 99.5% accuracy, answers in real time in typically under 400ms, never charges for unknowns, refunds bounces automatically when you connect your sending platform, and includes RocketShield, an MCP server and every integration on every plan. Sign up and get 100 free verification credits instantly. No credit card required.

Vendor facts from each vendor's own published pages, checked November 1, 2026. Sources: DeBounce, MillionVerifier.

Try the better choice on your own list

Verify a real sample and see the difference. Unknowns are free, bounces are refunded and credits never expire.

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100 free credits · No card required · Credits never expire