Life & fun · alternatives · 2026

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

1. 1
   Re/code Decode - Y Combinator's Sam Altman▲92

   and the internet of things and Google

   2015 · serve.castfire.com · its alternatives →

2. 2
   Flippy Bit And The Attack Of The Hexadecimals▲78

   Bitwise operations and conversions to hexadecimals

   2016 · flippybitandtheattackofthehexadecimalsfrombase16.com · its alternatives →

3. 3
   filippo.io/mlkem768 – Post-Quantum Cryptography for the Go Ecosystem▲315

   filippo.io/mlkem768 is a pure-Go implementation of the post-quantum key exchange mechanism ML-KEM-768 optimized for correctness and readability.

   2024 · words.filippo.io · its alternatives →

4. 4
   The Mathematics of Secrets▲3

   Cryptography from Caesar Ciphers to Digital Encryption

   2017 · amazon.com · its alternatives →

5. 5
   Hacked - The Problem with Passwords▲65

   Human stories to explain complex security problems

   2015 · soundcloud.com · its alternatives →

6. 6
   Phishing for Phools▲63

   The economics of manipulation and deception

   2015 · amazon.com · its alternatives →

7. 7HI
   "Have I Been Pwned” with homomorphic encryption▲5

   2023 · passwords.blyss.dev · its alternatives →

8. 8AP
   A plain-text eisenhower matrix with end-to-end encrypted sync▲6

   2020 · slymax.com · its alternatives →

9. 9
   DPG – A deterministic password generator▲7

   2017 · github.com · its alternatives →

10. 10AE
    Algebraic — Effortless macOS file encryption, integrated with Finder.▲7

    2022 · algebraic.cc · its alternatives →

11. 11NG
    NSA-grade encryption and anonymization for health and financial data▲9

    2018 · nukleosome.com · its alternatives →

12. 12
    An interactive tutorial on symmetric encryption▲5

    symmetric encryption, speck, block modes, brute-force, nonce reuse

    2022 · easylang.online · its alternatives →

13. 13FG
    Freenet Ghost Keys: Anonymous, Verifiable Identities▲6

    2024 · freenet.org · its alternatives →

14. 14CA
    Cheshire: a CryptoKitties developer sandbox▲7

    2018 · medium.com · its alternatives →

15. 15BI
    Bloop: Information-theoretically secure, expiring messages▲9

    2014 · bloop.mit.edu · its alternatives →

16. 16
    Crypto data from multiple exchanges to multiple storage systems-Updated▲8

    2021 · github.com · its alternatives →

17. 17OS
    Open-source, MIT JavaScript crypto library behind Skiff Mail▲8

    2023 · npmjs.com · its alternatives →

18. 18
    Nullsec – server-blind encrypted paste▲6

    Sep 2026 · nullsec.pntr.dev · its alternatives →

19. 19
    A Golang library to build Turing machine▲6

    2019 · made2591.github.io · its alternatives →

20. 20
    Irrational▲7

    Infinite Non-repeating sequence generator

    2020 · theabbie.github.io · its alternatives →

21. 21TH
    TypeScript Hack – Type System Text Adventure▲7

    2020 · ricklove.me · its alternatives →

22. 22FA
    Ferret – A Hard Real-Time Clojure for Lisp Machines▲7

    2016 · nakkaya.com · its alternatives →

23. 23DM
    Deobfuscate.Me – a JavaScript deobfuscation Game▲7

    2014 · deobfuscate.me · its alternatives →

24. 24ST
    Secure Typeform and Jotform Replacement – at lower cost▲5

    2020 · globalpatron.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 →