Alternatives

Products that do what OllaVPN does

Post-Quantum Cryptography

1. 1KA
   Kryptonite – a new home for your SSH private key▲338

   2017 · krypt.co

2. 2
   SatoshiVPN▲212

   Run your own private & anonymous VPN server.

   2020

3. 3MA
   Monocypher: a small, easy to use crypto library▲90

   2017 · loup-vaillant.fr

4. 4VB
   Very basic blockchain-free cryptocurrency PoC in Python▲171

   2017 · github.com

5. 5CP
   CryptoProof – post proofs to the Ethereum blockchain for free▲55

   2018 · cryptoproof.org

6. 6PV
   PJON v11.1 an independent, decentralized, open-source protocol▲56

   2018 · github.com

7. 7EI
   EmailPK – Instant encrypted email▲53

   2014 · diafygi.github.io

8. 8GC
   GetHTTPSforFree.com, a no-install browers-based Let's Encrypt client▲18

   2015 · gethttpsforfree.com

9. 9PC
   PQC.club – Post-Quantum Cryptography Tools and Alternatives▲6

   2024 · pqc.club

10. 10OS
    Open-Source Anonymous Encrypted TLS+OTR Messaging Written in Go▲25

    2015 · hacktunnel.com

11. 11PA
    ProKZee – An Open-Source Network Security Tool Written in Go▲7

    Hi HN! After several months of work, I'm excited to share ProKZee, a free and open-source network security tool built with Go and React using Wails framework. ProKZee allows developers, security researchers, and penetration testers to intercept, inspect, and modify HTTP/S traffic — similar to tools like Burp Suite, OWASP ZAP, and Caido — but with a fast native UI, modern UX, and some unique features. https://github.com/al-sultani/prokzee

    2025 · github.com

12. 12GE
    GoUmbral – ECC arithmetic layer, and soon-to-be proxy re-encryption lib▲19

    2018 · github.com

13. 13PO
    PrivaNote – offline first, end-to-end encrypted notes▲10

    2021 · privanote.xyz

14. 14OT
    Ockam – Tools for end-to-end encryption, in Rust▲10

    2021 · github.com

15. 15P1
    Plakar 1.0.4 – Open-Source Backup That's Fast, Encrypted, and Browsable▲8

    It’s still young, but they are shipping fast, and it's open source. Anyone else playing with it?

    Sep 2025 · plakar.io

16. 16SE
    Secure end-to-end client sessions and API calls using crypto key pairs▲9

    Hello. I made this project as an experiment in using key cryptography for user identity in a client server model, and for some future peer to peer projects that I am working on. I am looking for feedback, please let me know what you think. Also, Merry Christmas to HN! :-)

    2022 · github.com

17. 17EE
    Encrypted emails based on Signal protocol with post-quantum algorithms▲10

    Hi HN, we have recently completed a research project on how to encrypt emails with post-quantum secure algorithms as well as Forward Secrecy. We'd love to hear your feedback and discuss technical issues. The paper can be found here: https://eprint.iacr.org/2021/875

    2021

18. 18IB
    I Built a Groth16 ZK-Proof Verifier from Scratch Using Rust▲6

    I've always been fascinated by cryptographic principles, so I decided to dive deep into zero-knowledge proofs and implement a Groth16 proof verifier entirely in Rust. This project validates cryptographic proofs and demonstrates how succinct, verifiable computations can be achieved. Using Rust's powerful libraries like arkworks, I implemented pairing checks, public input commitments, and proof validation logic while ensuring the code remains modular and efficient. I handled the complexities of affine group operations, scalar multiplications, and optimized public input verification to make…

    2024 · github.com

19. 19OS
    Open-source code for a private, infinitely scalable, PQ-secure L1 layer▲7

    Feb 2026 · github.com

20. 20OS
    Open-Source Quantum Solver for Maximum Independent Set Problems▲6

    We’ve just released an open-source library for solving the Maximum Independent Set (MIS) problem with neutral atom quantum computing, running on both quantum processing units (QPUs) and classical hardware, thanks to emulators. This project is the result of collaboration between Pasqal, academic researchers, and industry partners, aiming to make it practical to experiment with quantum approaches to hard combinatorial optimization tasks. The MIS problem appears in real-world scenarios like scheduling, resource allocation, and network optimization, areas where classical solvers often struggle…

    2025

21. 21FQ
    Free Quantum-Resistant Timestamping API (Dual-Signature and Bitcoin)▲5

    SasaSavic.ca recently launched a public cryptographic timestamping service designed to remain verifiable even in a post-quantum world. The platform uses SasaSavic Quantum Shield™, a dual-signature protocol combining classical and post-quantum security. Each submitted SHA-256 hash is: • Dual-signed with ECDSA P-256 and ML-DSA-65 (per NIST FIPS 204) • Anchored to the Bitcoin blockchain via OpenTimestamps • Recorded in a public, verifiable daily ledger API (beta, no auth required): https://sasasavic.ca/beta-api/ Example curl request: curl -X POST…

    Nov 2025

22. 22RC
    Roq – C++ HFT on Crypto Exchanges with μs Latency▲11

    2019 · roq-trading.com

23. 23ZS
    Zero-setup e2e encrypted message queue for free in 1 line of Python▲8

    Put this together because I was tired of setting up anything when testing / prototyping projects that need a simple queue. Feedback / PRs / issues welcome. Feel free to use in production if you dare (or run your own server).

    2023 · github.com

24. 24RS
    Run `SSH bitbop.io`, get a personal GPU dev machine▲7

    Hi HN! I've been hacking on this side project for the last month or two with the goal of making it dead simple to use cloud GPUs. I ran into this problem personally during the phd, and built my own tooling around it. I always thought it'd be fun to try to turn that tooling into a more general product... and bitbop.io is the result! All you have to do is run `ssh bitbop.io`, and you get your own personal dev GPU workstation in the cloud. Looking forward to hearing your thoughts!

    2024 · twitter.com

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