A Python and C framework for simulating spacecraft dynamics, guidance, navigation and control in astrodynamics missions.
418+3 this week146CISCWell maintainedUpdated 10 hours ago
1 alternative
Best open-source alternatives to STK (2026)
Looking for a free, open-source alternative to STK? These 1 projects can replace it. Each one passed our quality screening and is explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| AVSLab/basilisk | ★ 418 | ISC | 10 hours ago |
FAQ
- Is there a free, open-source alternative to STK?
- Yes. The most popular open-source alternatives to STK on Repolode are basilisk.
- Which STK alternative should I choose?
- basilisk has the most GitHub stars and is released under ISC. Compare the license and last commit of each option in the table above before choosing.
How this list is made: AI reads each project's documentation to match it with products it can replace, every project passes our quality screening, and the list is ranked by GitHub stars. Stars updated Nov 7, 2026. How Repolode works