Dev tools · alternatives · 2026

24 alternatives to API Spot

Domain API, Email Validation API and more

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. API Spot launched in 2020; newer entries below may have overtaken it.

1. 1
   Email Verify API▲92

   Simple email validation API for a $39 lifetime license

   2021 · cloudlyn.com · its alternatives →

2. 2
   Abstract APIs▲341

   Simple, powerful APIs for everyday dev tasks

   2020 · abstractapi.com · its alternatives →

3. 3
   Proofy▲181

   Quickly validate and verify your email lists.

   2016 · proofy.io · its alternatives →

4. 4
   API Portfolio — 5 Free APIs▲8

   5 free dev APIs: WHOIS, Company, Email, Geo, Sanctions

   Jul 2026 · on13uka.github.io · its alternatives →

5. 5
   Email Validator!▲193

   Free JSON API that gives you a simple way to validate emails

   2015 · garridodiaz.com · its alternatives →

6. 6
   API Tracker▲297

   IMDB for APIs, the world's biggest API search engine

   2022 · apitracker.io · its alternatives →

7. 7
   WHS.IS▲37

   Whois lookup and API

   2024 · whs.is · its alternatives →

8. 8
   Whois³▲80

   Know about everyone in web3

   2022 · its alternatives →

9. 9
   Domain WHOIS API▲3

   Free domain lookup — RDAP, no API key needed

   Aug 2026 · rapidapi.com · its alternatives →

10. 10
    Checker▲124

    Detect fake signups in under 200ms with an easy-to-use API

    2025 · its alternatives →

11. 11
    Domain Checker API▲3

    Check all domains informations with one API.

    2020 · its alternatives →

12. 12
    Legitmailbox▲75

    Email Verification API with monthly reports

    2021 · its alternatives →

13. 13
    WHOIS Checker - Chrome Extension▲10

    Check WHOIS details of any website with a single click.

    2024 · hostingchecker.net · its alternatives →

14. 14
    Spam Check▲93

    A free JSON API to check your email messages' spam scores

    2015 · spamcheck.postmarkapp.com · its alternatives →

15. 15
    ApiHome▲73

    Home of API testing

    2022 · apihome.io · its alternatives →

16. 16
    API Pick▲71

    Data APIs for AI agents & developers — free to start

    Feb 2026 · apipick.com · its alternatives →

17. 17
    takenorfree.com▲6

    Domain availability checks for humans and AI agents.

    Jun 2026 · takenorfree.com · its alternatives →

18. 18
    APIddress — email validation API▲17

    The email validation API that shows its work

    Jun 2026 · apiddress.com · its alternatives →

19. 19
    Email Finder API▲4

    Find verified business emails from a name and company domain

    Jun 2026 · rapidapi.com · its alternatives →

20. 20
    DomainDetails.com - Free & Private WHOIS▲26

    Free & Private domain research - right in your browser

    Dec 2025 · domaindetails.com · its alternatives →

21. 21
    Free Domain Tool▲14

    Domain availability checker

    2025 · domainaide.com · its alternatives →

22. 22
    Email Finder API ▲9

    Find Anyone's Work Email Instantly – Conquer Lead Generation

    2025 · rapidapi.com · its alternatives →

23. 23
    Website Setup Tools▲6

    Free Domain Name Generator, WHOIS Information, IP Lookup

    2021 · websitesetuptools.com · its alternatives →

24. 24
    EmailListVerify▲35

    Find and validate email address for half the price

    2024 · emaillistverify.com · 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 →