Life & fun · alternatives · 2026

24 alternatives to Micro subject line statistical significance calculator

A/B tests. Made with Aaron Swartz. Hidden cats.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Micro subject line statistical significance calculator launched in 2015; newer entries below may have overtaken it.

1. 1
   A/B Test significance calculator▲131

   Optimize tests with visual & interactive insights

   2024 · tggl.io · its alternatives →

2. 2AB
   ABBA - Beautiful, open-source A/B test calculator▲51

   2012 · thumbtack.com · its alternatives →

3. 3
   A/B Test Calculator▲5

   Are your A/B results significant?

   2015 · vwo.com · its alternatives →

4. 4AC
   ABTestCalculator.com, an open source A/B test significance calculator▲7

   Determine whether or not your A/B tests are statistically significant with our free visual A/B test calculator.

   2015 · abtestcalculator.com · its alternatives →

5. 5
   Dual Kind▲74

   Simple A/B testing

   2020 · dualkind.com · its alternatives →

6. 6
   A/B Test Checker▲76

   Check if your A/B test is relevant

   2022 · its alternatives →

7. 7
   Apptimize▲74

   The easiest way to make impactful mobile A/B tests

   2014 · airship.com · its alternatives →

8. 8
   Tiny A/B Test▲163

   Lightweight a/b testing for saas founders

   Oct 2025 · tinyabtest.com · its alternatives →

9. 9
   FaceOff▲137

   A/B test your profile pic

   2015 · its alternatives →

10. 10
    Planet Money - 669: A or B▲94

    Planet Money A/B tests an ep about A/B testing

    2015 · its alternatives →

11. 11
    ABBY.io▲94

    The easiest way to evaluate A/B tests, all in a single place

    2015 · abby.io · its alternatives →

12. 12
    Calca▲87

    Symbolic calculator

    2014 · calca.io · its alternatives →

13. 13
    R Package for Bayesian AB Testing▲38

    🐢 bayesAB: Fast Bayesian Methods for A/B Testing. Contribute to FrankPortman/bayesAB development by creating an account on GitHub.

    2017 · github.com · its alternatives →

14. 14
    abtest.design▲75

    Curated collection of A/B test results

    2024 · abtest.design · its alternatives →

15. 15
    Calcbot▲111

    The intelligent calculator and unit converter by Tapbots

    2014 · tapbots.com · its alternatives →

16. 16
    TestSubject▲133

    Test how your email subject line displays on mobile devices.

    2016 · zurb.com · its alternatives →

17. 17
    Prayas Analytics▲139

    A/B testing for retail stores, w/ existing security cameras

    2015 · prayasanalytics.com · its alternatives →

18. 18
    Marketing School - Building a Strong A/B Testing Plan That Gets Results▲60

    What is A/B Testing and why do we do it?

    2016 · traffic.libsyn.com · its alternatives →

19. 19
    Increab▲102

    Run A/B Tests in the easiest way to increase your sales.

    2022 · its alternatives →

20. 20
    3 Minute Optimizer▲81

    Easy A/B testing for non-techie SMEs

    2015 · its alternatives →

21. 21
    Splitter A/B Testing▲77

    Split and track in real time, by AppDrag

    2018 · splitter.appdrag.com · its alternatives →

22. 22
    cromonitor▲100

    Monitor Your Competitor's A/B & MV Tests

    2014 · app.alliplatform.com · its alternatives →

23. 23TW
    The Whicher: A/B test the Real World▲20

    2012 · thewhicher.com · its alternatives →

24. 24
    Abacusmetrics▲60

    Free SAAS Metrics for Stripe

    2014 · abacusmetrics.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 →