Dev tools · alternatives · 2026

24 alternatives to mosparo

the modern spam protection

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. mosparo launched in 2023; newer entries below may have overtaken it.

1. 1
   mosparo

   The modern spam protection

   2023 · its alternatives →

2. 2
   Google Invisible reCAPTCHA▲427

   Protects your website from spam and abuse

   2017 · its alternatives →

3. 3
   hi.new▲570

   Prevent spam, stay reachable

   2024 · its alternatives →

4. 4MM
   Mox - Modern full-featured low-maintenance self-hosted mail server▲471

   2023 · github.com · its alternatives →

5. 5
   You've Got Spam▲309

   A new tool that lets you spam back the spammer

   2020 · its alternatives →

6. 6
   Firefox Relay▲252

   Hide your real email address to help protect your identity.

   2021 · its alternatives →

7. 7
   Form Defender▲8

   Defend your forms from spam

   Dec 2025 · formdefender.me · its alternatives →

8. 8
   AnonAddy▲132

   Open-source anonymous email forwarding. Stop spam.

   2019 · its alternatives →

9. 9
   Cleanfox▲151

   Clean up your inbox, save the earth.

   2017 · its alternatives →

10. 10
    Gapflow.io▲141

    Spam filter, autoreply & forwarding for Webflow native Forms

    2025 · gapflow.io · its alternatives →

11. 11
    Stripo.email▲231

    Free email template builder for designers and developers

    2018 · its alternatives →

12. 12
    FormSanitizer▲160

    Stop spammy form submissions with custom filters.

    2025 · formsanitizer.com · its alternatives →

13. 13
    Shieldy▲126

    A zero-config Telegram bot that fights spam in chats

    2018 · its alternatives →

14. 14
    Antideo▲110

    API for IP and Email Intelligence & Phone Number Validation

    2019 · its alternatives →

15. 15
    Spam Checker by Mailmeteor▲88

    Detect and remove spam words in your emails

    2022 · its alternatives →

16. 16
    Bouncer Shield▲85

    Real-time form protection against bad emails

    2024 · usebouncer.com · its alternatives →

17. 17
    ZENCAPTCHA▲115

    Privacy-first bot & spam defense, GDPR compliant CAPTCHA

    2023 · its alternatives →

18. 18
    OOPSpam Anti-Spam API 2.0▲58

    A powerful spam filter for any content exchange.

    2019 · its alternatives →

19. 19
    Stripo▲86

    All-in-one email design platform

    2021 · its alternatives →

20. 20
    SMS Junk Filter for iOS▲102

    Block unwanted SMS spam text messages

    2017 · its alternatives →

21. 21
    Guard.dm▲98

    Make the spammers pay, literally

    2023 · its alternatives →

22. 22
    RoboKiller▲85

    The app that stops spam calls forever

    2019 · its alternatives →

23. 23
    Phishero▲72

    Test your organisation's resiliency towards phishing attacks

    2018 · its alternatives →

24. 24
    kalleo▲7

    mobile app that protects you from robocallers and spammers.

    2018 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →