Dev tools · alternatives · 2026

24 alternatives to WhoisJSON

WhoisJSON — WHOIS, DNS & SSL in one API key. Free plan.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Domain WHOIS API▲3

   Free domain lookup — RDAP, no API key needed

   Aug 2026 · rapidapi.com · its alternatives →

2. 2
   Whois³▲80

   Know about everyone in web3

   2022 · its alternatives →

3. 3
   WHOIS by Weekend Labs▲67

   Unlock the secrets of any domain with just one WHOIS search

   2023 · 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. 5ZS
   ZipWhois: Simple JSON Whois API and Domain API▲6

   2014 · zipwhois.com · its alternatives →

6. 6
   DomainDetails.com - Free & Private WHOIS▲26

   Free & Private domain research - right in your browser

   Dec 2025 · domaindetails.com · its alternatives →

7. 7
   JSON Api▲175

   Hosted API's to develop your app for free 🙌

   2020 · jsonapi.co · its alternatives →

8. 8
   NS6.com▲71

   Register domains across 800+ extensions with free WHOIS privacy, free DNS and free SSL on every domain. Search, transfer in, and manage everything in one place.

   2022 · ns6.com · its alternatives →

9. 9
   A simple API to store and retrieve JSON objects▲18

   2015 · openbucket.io · its alternatives →

10. 10
    WHS.IS▲37

    Whois lookup and API

    2024 · whs.is · its alternatives →

11. 11
    WHOIS Checker - Chrome Extension▲10

    Check WHOIS details of any website with a single click.

    2024 · hostingchecker.net · its alternatives →

12. 12
    Whois▲6

    Whois : domain and IP address Lookup. All TLDs

    2019 · its alternatives →

13. 13
    WebCargo - JSON WHOIS API▲5

    Mundane API's with seamless integration

    2017 · its alternatives →

14. 14
    URL Meta▲108

    API to get URL meta info, screenshots and domain DNS records

    2023 · urlmeta.org · its alternatives →

15. 15
    Website Setup Tools▲6

    Free Domain Name Generator, WHOIS Information, IP Lookup

    2021 · websitesetuptools.com · its alternatives →

16. 16
    WHOIS_OS▲6

    Domain, nameserver lookup & IP tools

    2023 · whoisos.com · its alternatives →

17. 17
    takenorfree.com▲6

    Domain availability checks for humans and AI agents.

    Jun 2026 · takenorfree.com · its alternatives →

18. 18
    DNS Digger▲13

    Blazing fast DNS lookup, WHOIS & record check in one tool

    2025 · dnsdigger.xyz · its alternatives →

19. 19
    digga – DNS, RDAP/WHOIS, subdomains and more in one lookup▲6

    Free domain lookup for DNS records, RDAP, WHOIS, subdomains, IPs, and email security. Research any domain in one fast report.

    Jul 2026 · digga.dev · its alternatives →

20. 20
    A site to look up DNS records▲82

    DNS record lookups just as you like 'em

    2017 · dnsrecords.io · its alternatives →

21. 21JE
    JSONP - enable cross-domain requests to any JSON API (w/ AJAX)▲51

    2012 · jsonp.jit.su · its alternatives →

22. 22
    Domainduck▲5

    A domain API for pricing, WHOIS, availability and more.

    Jan 2026 · domainduck.io · its alternatives →

23. 23
    Whois Data Solution▲33

    Generate over 50,000 prospects every day

    2020 · its alternatives →

24. 24
    Free Domain Tool▲14

    Domain availability checker

    2025 · domainaide.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 →