OS Tools

    Verify Your Emails

    Built for outbound operators sending real volume. Catch-all detection, role-account flags, and a risky-email rescue pass on anything our primary engine can't decide. Pay for confident results only — undecideds are refunded automatically.

    Campaign analytics showing strong reply rates and opportunities from verified emails

    1 credit per email · Bulk CSV up to 10,000 rows · Refund on any unverifiable result

    What outbound teams actually buy

    5,000 emails

    $15

    test a niche

    25,000 emails

    $50

    one solid campaign

    100,000 emails

    $140

    a quarter of outbound

    See all 8 packs →

    Why Choose Us Over the Competition?

    Better accuracy. Lower price.

    OS ToolsOS ToolsBest Value
    MillionVerifierMillionVerifier
    EmailListVerifyEmailListVerify
    MailgunMailgun
    Price / 100 emails$0.30$0.50$0.50$1.20
    Accuracy99.99%96%93%87%
    No monthly fee
    Verify Risky Emails?
    Free trial

    * Pricing based on entry-level plans. Accuracy based on independent testing.

    3B+

    Emails Checked

    46%

    Were Bad

    99.9%

    Deliverability Ensured

    Support

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