AirSim
Open-source drone and vehicle simulator built on Unreal Engine for AI and robotics research.
How the 7.6 was reached
- Quality of output7/10
18,521 stars and 4,929 forks show strong adoption in research; 781 open issues and an unclear licence (NOASSERTION) are drawbacks. github.com
- Ease of use6/10
Binaries or source builds on Windows, Linux and macOS require Unreal Engine setup; no docs page was found at the checked address. microsoft.github.io
- Pricing value10/10
Completely free and open source, with no paid tier or license fees. microsoft.github.io
- API and integration quality8/10
RPC APIs usable from multiple languages for images, state and vehicle control; PX4 and ArduPilot integration. github.com
- Solves the problem it claims to solve7/10
Drone and car simulation for AI research is delivered and widely adopted (18.5k stars); the repository's activity gives independent support. github.com
7.6/10 is the mean of the 5 criteria that apply. Scored on the five-criteria rubric v1, 29 September 2026. How scoring works
Pricing
- Full source code
- Unreal Engine integration
- Python and C++ APIs
- All sensors and vehicle types
Key Features
- Photorealistic simulation via Unreal Engine 4 for training computer vision models
- Drone and ground vehicle simulation with realistic physics
- Python and C++ APIs for programmatic vehicle control
- Multiple sensor types: cameras, LIDAR, depth, infrared, event cameras
- PX4, ArduPilot, and MavLink flight controller support with ROS integration
Pros & Cons
Pros
- Free and open source under MIT license with no usage restrictions
- High-fidelity rendering makes it genuinely useful for perception model training
- Broad sensor suite covers most autonomous systems research needs
- Multi-vehicle simulation and domain randomization supported out of the box
Cons
- Microsoft archived the original repo in 2022; active development moved to a commercial successor called Project AirSim
- Requires a powerful GPU and a full Unreal Engine installation — setup takes hours
- Windows-first; Linux and macOS builds require extra effort and have known issues
- No hosted or cloud option — everything runs on local hardware
AirSim is a free, open source drone and car simulator for AI research, with RPC APIs and PX4 and ArduPilot support. Strong adoption backs it, but Unreal Engine setup is a hurdle, the licence is unclear, and open issues pile up.
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