Top 22 C Blockchain Projects

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1. Ravencoin

   1 76 1,117 3.3 C

   Ravencoin Core integration/staging tree

   

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. mako

   2 14 596 5.1 C

   Bitcoin node written in C (by chjj)

   

4. blockchain-crypto-mpc

   3 1 482 0.0 C

   Protecting cryptographic signing keys and seed secrets with Multi-Party Computation.

   

5. Zenroom

   4 15 247 9.6 C

   Secure execution VM executing human-like language (no-code) to operate on data and advanced cryptographic operations.

   

   Project mention: Zenroom – No-code cryptographic virtual machine | news.ycombinator.com | 2025-12-02

6. aergolite

   5 1 117 0.0 C

   AergoLite: Trustless SQLite Replication

   

7. monotone

   6 2 112 7.4 C

   Embeddable Cloud-Native Key-Value Storage For Sequential Data.

   

   Project mention: Show HN: Monotone v1.2.0 is out (cloud native key-value storage for seq data) | news.ycombinator.com | 2025-06-18

8. denarius

   7 3 109 0.0 C

   Denarius [$D] is a PoW/PoS Hybrid Cryptocurrency with Tribus a new PoW Hashing Algo built specifically for D, one of a kind hybrid masternodes called Fortuna Stakes, atomic swaps, staking, mining, IPFS, optional Native Tor and I2P, and much more!

   

9. eth.zig

   8 1 77 8.6 C

   Zig Ethereum client library. Faster than alloy.rs on 20/26 benchmarks.

   

   Project mention: Show HN: Eth.zig – Pure Zig Ethereum library, 19/26 benchmark wins vs. alloy.rs | news.ycombinator.com | 2026-02-26

10. libethc

    9 5 72 7.1 C

    Open-source Ethereum library for C/C++

    

11. yespower

    10 2 35 4.1 C

    Proof-of-work scheme building upon yescrypt and scrypt

    

12. postgres_web3

    11 3 33 6.8 C

    PostgreSQL extension implementing optimized data types for web3 applications

    

13. xmr

    12 1 31 1.8 C

    Monero node.

    

14. protoblock

    13 1 15 10.0 C

    Protoblock blockchain protocol core

    

15. purplecoin

    14 4 14 4.1 C

    Purplecoin/XPU Core integration/staging tree

    

16. NewFinance

    15 1 12 4.5 C

    Multi Party Secured Mobile Bitcoin Wallet

    

17. chiagen

    16 4 10 3.6 C

    standalone chia generator

    

18. php-secp256k1

    17 1 3 5.3 C

    Bitcoin/Ethereum elliptic curve cryptography for PHP (3000× faster, with sign/verify/recover)

    

    Project mention: Unleashing Native‑Speed Crypto in PHP: Introducing php‑secp256k1 & php‑keccak256 | dev.to | 2025-10-19

    # Dependencies sudo apt-get update sudo apt-get install -y libsecp256k1-dev libssl-dev php-dev build-essential # php-secp256k1 git clone https://github.com/BuildCoreWorks/php-secp256k1.git cd php-secp256k1 && phpize && ./configure && make && sudo make install echo "extension=secp256k1.so" | sudo tee /etc/php/8.1/mods-available/secp256k1.ini sudo phpenmod secp256k1 # php-keccak256 git clone https://github.com/BuildCoreWorks/php-keccak256.git cd php-keccak256 && phpize && ./configure && make && sudo make install echo "extension=keccak.so" | sudo tee /etc/php/8.1/mods-available/keccak.ini sudo phpenmod keccak

19. php-keccak256

    18 2 2 6.1 C

    High-performance Keccak-256 hashing for PHP (14-16× faster than pure PHP). C extension for Ethereum address derivation, transaction hashing, and blockchain applications. Production-ready, MIT licensed.

    

    Project mention: Unleashing Native‑Speed Crypto in PHP: Introducing php‑secp256k1 & php‑keccak256 | dev.to | 2025-10-19

    # Dependencies sudo apt-get update sudo apt-get install -y libsecp256k1-dev libssl-dev php-dev build-essential # php-secp256k1 git clone https://github.com/BuildCoreWorks/php-secp256k1.git cd php-secp256k1 && phpize && ./configure && make && sudo make install echo "extension=secp256k1.so" | sudo tee /etc/php/8.1/mods-available/secp256k1.ini sudo phpenmod secp256k1 # php-keccak256 git clone https://github.com/BuildCoreWorks/php-keccak256.git cd php-keccak256 && phpize && ./configure && make && sudo make install echo "extension=keccak.so" | sudo tee /etc/php/8.1/mods-available/keccak.ini sudo phpenmod keccak

20. zclassic

    19 1 2 2.2 C

    ZClassic full node in one ~15 MB pure-C23 binary — Equihash 200,9 PoW, Sapling shielded transactions, embedded Tor onion service, block explorer, wallet, and an MCP server for AI-native operation

    

    Project mention: Show HN: Fable, Make Me a Crypto Blockchain Full Node Tor Onion Service P2P" | news.ycombinator.com | 2026-06-09

21. VDF4J

    20 0 1 5.3 C

    An implementation of Verifiable Delay Functions in Java

    

22. OWO

    21 1 1 7.2 C

    OneWorld wallet repository (by decenomy)

    

23. xfsgo

    22 1 0 0.0 C

    A distributed network complying with XFS protocol

    

C Blockchain related posts

• Zenroom – No-code cryptographic virtual machine

  1 project | news.ycombinator.com | 2 Dec 2025

• Unleashing Native‑Speed Crypto in PHP: Introducing php‑secp256k1 & php‑keccak256

  2 projects | dev.to | 19 Oct 2025

• Show HN: Monotone v1.2.0 is out (cloud native key-value storage for seq data)

  1 project | news.ycombinator.com | 18 Jun 2025

• RETHV - Building Reth for the RISC-V platform

  4 projects | dev.to | 28 Jun 2024

• Cloud-native key-value storage for sequential data

  1 project | news.ycombinator.com | 29 Apr 2024

• Embeddable key-value storage for events and time-series data (v1.0 released)

  1 project | news.ycombinator.com | 18 Apr 2024

• How do I know if I'm actually mining Monero correctly and everything is alright?

  3 projects | /r/MoneroMining | 29 May 2023
• A note from our sponsor - SaaSHub
  www.saashub.com | 14 Jun 2026

  SaaSHub helps you find the best software and product alternatives Learn more →

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