Best OpenSpace Alternatives in 2026
Updated
20 tools from astronomy apps ranked against OpenSpace on the same published basis.
- 1OpenSpace vs Celestia
- 2OpenSpace vs NASA Eyes
- 3OpenSpace vs Solar System Scope
- 4OpenSpace vs Cosmic Watch
- 5OpenSpace vs Star Walk 2
- 6OpenSpace vs Star Chart
- 7OpenSpace vs Star Chart
- 8OpenSpace vs Night Sky
- 9OpenSpace vs Seestar App
- 10OpenSpace vs SkySafari
- 11OpenSpace vs Stellarium
- 12OpenSpace vs DWARFLAB App
- 13OpenSpace vs Gaia Sky
- 14OpenSpace vs KStars
- 15OpenSpace vs Luminos Pro
- 16OpenSpace vs Singularity
- 17OpenSpace vs SkyPortal
- 18OpenSpace vs Spot the Station
- 19OpenSpace vs Starmap
- 20OpenSpace vs WorldWide Telescope
OpenSpace alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Celestia | 7.7 | Free plan | Free | Android, iOS, Linux, Mac, Web, Windows |
| 2 | NASA Eyes | 7.7 | Free plan | Free | Android, iOS, Linux, Mac, Web, Windows |
| 3 | Solar System Scope | 7.7 | Free plan | Free | Android, iOS, Mac, Web, Windows |
| 4 | Cosmic Watch | 7.5 | Free plan | $0.42/mo | Android, iOS, Mac |
| 5 | Star Walk 2 | 7.5 | Free plan | $0.50/mo | Android, iOS |
| 6 | Star Chart | 7.4 | Free plan | Free | Android, iOS, Mac, Windows |
| 7 | Star Chart | 7.4 | Free plan | Free | Android, iOS, Mac, Windows |
| 8 | Night Sky | 7.3 | Free plan | Free | Android, iOS, Mac |
| 9 | Seestar App | 7.2 | No | — | Android, iOS, Mac, Windows |
| 10 | SkySafari | 7.2 | No | — | Android, iOS, Mac, Web |
| 11 | Stellarium | 7.2 | Free plan | Free | Linux, Mac, Web, Windows |
| 12 | DWARFLAB App | 7.1 | Free plan | Free | Android, iOS |
| 13 | Gaia Sky | 7.1 | Free plan | Free | Linux, Mac, Windows |
| 14 | KStars | 7.1 | Free plan | Free | Linux, Mac, Windows |
| 15 | Luminos Pro | 7.1 | No | $3/mo | iOS, Mac |
| 16 | Singularity | 7.1 | Free plan | Free | Android, iOS |
| 17 | SkyPortal | 6.9 | Free plan | Free | Android, iOS |
| 18 | Spot the Station | 6.9 | Free plan | Free | Android, iOS |
| 19 | Starmap | 6.9 | Free plan | Free | iOS, Mac |
| 20 | WorldWide Telescope | 6.9 | Free plan | Free | API, Web, Windows |
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Questions about OpenSpace alternatives
What is the best alternative to OpenSpace?
Celestia, number 1 in astronomy apps with a score of 7.7 out of 10. The others here: NASA Eyes, Solar System Scope, Cosmic Watch and 16 more.
What is the best free alternative to OpenSpace?
Celestia is the best-ranked alternative with a free plan. 17 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.