igraph

The premium Open Source alternative to Pajek

🎯 Best for:Large-scale network modeling and statistical analysis
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GPL-2.0License

What is igraph?

Replaces proprietary network analysis software with a high-performance library for complex graph theory. It handles millions of vertices and edges using an efficient C core with high-level language bindings.

Tech Stack
CMathematics & Statistics

Why igraph?

  • Extremely fast graph processing
  • Cross-platform compatibility
  • Rich set of visualization options

Limitations

  • Steep learning curve for C API
  • Visualization requires external libraries for best results
  • Memory intensive for massive datasets
3/5/2026
Last Update
438
Forks
266
Issues
GPL-2.0
License
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Competitor Cost
-$1,440
/ year (est. based on Pajek)
Self-Hosted
$0
/ year
Team Size10 Users
150+
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