Communication·Standings

Email Validation Software

Email validation tools check email addresses before messages are sent; the choice turns on where you run the tool and how its price fits your workflow.

Use the signal score out of 10 as a quick comparison. Listing marks show whether a tool has an API, open-source code, or a free tier, so check those marks against your needs.

  • 13 platforms
  • 6 with a public API on this page
  • 11 with a free tier
  • Checked 19 Oct 2026
  1. 1
    H
    Hunterhunter.io

    Contact-data service with free web, API, and browser-extension access.

    7.2 APIOpenFree Free tier · from $34/mo
  2. 2
    CE
    Clearout Email Verificationclearout.io

    Checks email addresses in lists, signup forms, or an API, with more than 20 tests and grouped results.

    6.0 APIOpenFree Free tier
  3. 3
    P
    Proofyproofy.io

    Proofy checks email addresses before sending and classifies invalid, risky, disposable, catch-all, and role-based addresses.

    6.0 APIOpenFree Free tier · $5 one-time
  4. 4
    Q
    QuickEmailVerificationquickemailverification.com

    Checks email lists through imports or file uploads and returns signup checks as JSON.

    6.0 APIOpenFree Free tier
  5. 5
    AM
    APILayer Marketplacemarketplace.apilayer.com

    API marketplace with a free plan, 40+ APIs, one key, one dashboard, and web access.

    5.9 APIOpenFree Free tier · from $19.99/mo
  6. 6
    D
    DeBouncedebounce.com

    Checks email lists for formatting issues, temporary addresses, spam traps, and other risks.

    5.9 APIOpenFree Free tier
  7. 7
    E
    Emailableemailable.com

    Email verifier for bulk lists and forms, with reports, inbox placement, and DMARC, SPF, and DKIM checks.

    5.9 APIOpenFree Free tier · from $32.30/mo
  8. 8
    M
    MailboxValidatormailboxvalidator.com

    Email validator with web and API access, bulk text or CSV uploads, and JSON or XML results.

    5.9 APIOpenFree Free tier
  9. 9
    X
    XVerifyxverify.com

    Contact verifier for email, phone, and postal data, with mailbox checks and 200+ blacklist monitoring.

    5.8 APIOpenFree Free tier · $5 one-time
  10. 10
    C
    CaptainVerifycaptainverify.com

    Email and mobile-number verifier with API and web access, a trial, and 100 free email credits.

    5.5 APIOpenFree From $36/mo
  11. 11
    EH
    Email Hippoemailhippo.com

    Cleans uploaded CSV email lists of up to 500,000 records and flags several address risks.

    5.5 APIOpenFree From $9.88/mo
  12. 12
    K
    KickboxKickbox

    Email verification service with a free plan.

    4.9 APIOpenFree Free tier
  13. 13
    N
    NeverBounceNeverBounce

    Email verification service with a free plan, $8 pay-as-you-go option, and $49 monthly plan.

    4.9 APIOpenFree Free tier · from $49/mo

Places #1, #2, #3, #4, #5 on this board are open to sponsors. Take #1 · Other ways to advertise

How to choose

Which platform does it need to run on?

Choose a tool that matches your workflow: API, web interface, or browser extension. An API connects validation to another app, while a web tool runs in a browser.

Does it offer a free plan or trial?

Start with a free plan when you want ongoing access without an initial payment. A free trial can help you review a paid service before subscribing; check the listing for the exact offer.

How should I compare prices?

Compare the stated starting price and billing style. Examples include CaptainVerify from $7, Proofy from $5, QuickEmailVerification from $4, and Email Hippo from $9.88 per month.

Do I need open-source code?

Check the open-source mark when you need to inspect or change the code. The board also shows API and free-tier marks, which can matter when connecting a validator to an existing process.

Questions

Which email validation tools have a free plan?

Examples with a stated free plan include APILayer Marketplace, Clearout Email Verification, DeBounce, Emailable, Kickbox, MailboxValidator, NeverBounce, Proofy, and QuickEmailVerification.

Can I use an email validation API?

Check the API mark and platform details for the tool you are considering. An API is a way for another app or service to send validation requests.

Which email validation tools have a free trial?

The board marks free-trial availability separately from a free plan. MailboxValidator lists a 30-day trial; check other entries for their stated trial terms.

What does email validation software cost?

Prices vary by provider and plan. Listed starting points include $4 for QuickEmailVerification, $5 for Proofy, $7 for CaptainVerify, and $9.88 per month for Email Hippo.

Do these tools have open-source code?

Use the open-source mark on an entry to check this. Open-source code means the program's source is available to inspect or change under its licence.

Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure