
PettingZoo
by Farama-Foundation (organization)
A standard API for multi-agent reinforcement learning environments, with popular reference environments and related utilities (description from the project’s GitHub page)
Repository facts
- Stars
- 3,535
- Forks
- 547
- Open issues and pull requests
- 62
- Primary language
- Python
- License
- MIT License (MIT)
- Owner
- Farama-Foundation · Organization
- Created
- Jan 20, 2020
- Last push
- Oct 9, 2026
Topics
Add this badge to your README
Shows this repository’s rank in AI on GitHub and links back to this page. Ranks are by stars and change when the list is refreshed. The badge is not an endorsement or a rating. About the badges
Markdown (for a README)
[](https://unitedstatesofamericasuperintelligence.com/github/farama-foundation--pettingzoo/)
HTML
<a href="https://unitedstatesofamericasuperintelligence.com/github/farama-foundation--pettingzoo/"><img src="https://unitedstatesofamericasuperintelligence.com/badges/github/farama-foundation--pettingzoo.svg" alt="Ranked #2,216 in AI on GitHub" height="20"></a>
Related projects
Projects that share this one’s GitHub topics.
Rank 6,827: OpenRL-Lab/openrl
Unified Reinforcement Learning Framework
844 starsPythonApache-2.0Last push Sep 6, 2024
Rank 2,152: opendilab/DI-engine
OpenDILab Decision AI Engine. The Most Comprehensive Reinforcement Learning Framework B.P.
3,649 starsPythonApache-2.0Last push Dec 7, 2025
Rank 6,743: bold-lab-ai/JaxMARL
Multi-Agent Reinforcement Learning with JAX
859 starsPythonApache-2.0Last push Sep 10, 2026
Rank 2,180: pytorch/rl
A modular, primitive-first, python-first PyTorch library for Reinforcement Learning.
3,604 starsPythonMITLast push Oct 18, 2026
Rank 3,435: learnsyslab/gym-pybullet-drones
PyBullet Gymnasium environments for single and multi-agent reinforcement learning of quadcopter control
2,171 starsPythonMITLast push Oct 17, 2026
Rank 3,722: Farama-Foundation/Gymnasium-Robotics
A collection of robotics simulation environments for reinforcement learning
1,959 starsPythonMITLast push Oct 14, 2026