headlong

The premium Open Source alternative to Web3j

🎯 Best for:High-throughput Java applications interacting with Ethereum-compatible networks.
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Apache-2.0License

What is headlong?

Replaces standard, slower Java-based Ethereum ABI and RLP implementations. Delivers high-performance serialization for enterprise-grade blockchain applications and JVM-based nodes.

Tech Stack
JavaWeb3 & Blockchain

Why headlong?

  • Superior execution speed
  • Strict ABI v2 compliance
  • Minimal dependencies

Limitations

  • Java specific
  • Steep learning curve
  • Niche documentation
2/15/2026
Last Update
21
Forks
0
Issues
Apache-2.0
License
Financial Leak Detected

Stop the "SaaS Tax"

Your team could be burning cash. Switching to headlong instantly boosts your runway.

Competitor Cost
-$1,440
/ year (est. based on Web3j)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%

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