Dev tools · alternatives · 2026

24 alternatives to isEven API – tell if a number is even SaaS

isEven API tells you if a number is even

isEven API is a web service that determines whether a number is even or odd. Launched in 2020, it provides developers with a simple API endpoint for this mathematical check. The service is designed for software… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. isEven API – tell if a number is even SaaS launched in 2020; newer entries below may have overtaken it.

1. 1
   Numverify▲81

   Global phone number validation and lookup API

   2019 · numverify.com · its alternatives →

2. 2
   AnonymSMS▲275

   Temporary phone number for online verification

   2022 · anonymsms.com · its alternatives →

3. 3
   API Tracker▲290

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

   2022 · apitracker.io · its alternatives →

4. 4
   Advanced Mathematics Library for Node.js and JavaScript▲123

   Advanced Mathematics Library for Node.js and JavaScript - numbers/numbers.js

   2012 · github.com · its alternatives →

5. 5IM
   I made a simple persistent counting API▲54

   2013 · arbitrarycounter.com · its alternatives →

6. 6
   CountABC▲97

   Free counting API

   2023 · countabc.xyz · its alternatives →

7. 7
   ApiChecker▲104

   Reliable uptime and performance monitoring for your services

   2019 · its alternatives →

8. 8
   Count.io▲73

   A simple counting and A/B testing API.

   2017 · count.io · its alternatives →

9. 9
   Checker▲124

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

   2025 · its alternatives →

10. 10AB
    A bunch of simple SaaS calculators▲31

    2020 · saasformulas.com · its alternatives →

11. 11
    ZeroThreat▲98

    World's most intelligent web app & API security scan tool

    2024 · zerothreat.ai · its alternatives →

12. 12
    Apitally▲86

    G’day Hacker News, I’m Simon Gurcke, the sole founder of Apitally (https://apitally.io). I’m building a simple API monitoring and analytics tool for Python / Node.js apps. It helps users understand API usage and performance, spot issues early and troubleshoot effectively when something goes wrong. Features include: - Dashboards: Provide insights into API traffic, errors, performance and consumers. - Request logging: Opt-in and highly configurable in terms of what data is logged. Users can drill down from aggregated metrics to individual requests (proven to be super helpful…

    2023 · apitally.io · its alternatives →

13. 13
    The 2FA app that notifies you when you get `012345`▲35

    An indie project for early 2010s internet addicts

    2024 · jacobbartlett.substack.com · its alternatives →

14. 14AJ
    A Javascript library to overcomplicate Five▲69

    2014 · jackdcrawford.github.io · its alternatives →

15. 15CI
    Count.io – A simple counting and A/B testing API▲11

    2017 · count.io · its alternatives →

16. 16
    isitphish▲65

    The real-time phishing detection API

    2021 · its alternatives →

17. 17
    Callcounter▲62

    Analytics for APIs - discover trends, bottlenecks, errors

    2021 · its alternatives →

18. 18AR
    Anomalous – Real-time monitoring for servers, applications, and logs▲50

    2013 · getanomalous.com · its alternatives →

19. 19WA
    Web analytics with API only approach▲33

    2012 · infunl.com · its alternatives →

20. 20
    IP-Api.io – Geolocation by IP▲36

    Fast JSON API for IPv4/IPv6 geolocation, ASN/ISP data, and VPN/proxy detection. Start in minutes.

    2019 · ip-api.io · its alternatives →

21. 21
    Numverify API▲9

    Numverify api | phone number validation & phone lookup api

    2024 · numverify.com · its alternatives →

22. 22
    Telstra Event Detection API▲5

    Event Detection allows you to receive mobile network events

    2018 · dev.telstra.com · its alternatives →

23. 23
    AREXTest▲10

    API Test Tool with test case automation

    2024 · arextest.com · its alternatives →

24. 24
    IBAN API-Validate IBAN and get Bank Data▲8

    Freemium IBAN API-The Accurate IBAN Validation and Bank data

    2021 · ibanapi.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 →