
Celestia
Sky Guide
Sky Map
KStars
Solar System Scope
Space Engine
Star Walk
Stellarium is a free open source planetarium for your computer.

ChainMemory
Mem0
Memori
Pieces for Developers
cognee
TheSecondBrain.dev
Claiv Memory
Persistent memory for Claude Code, Codex & coding agents

Which is more popular?
Based on our record, Stellarium seems to be more popular. It has been mentioned 252 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | stellarium.org | agent-memory.dev |
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What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Stellarium - App REVIEW - Games in Education (Astronomy)
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Stellarium and Agentmemory. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I wanted to say "show me Mars" to a planetarium and have it fly there. So I built Nebula: an AI assistant plugin for Stellarium, the open-source planetarium. - Source: dev.to / 5 days ago
This is very cool, and looks like it targets you wanting to look stuff up and I will probably use it at some point. But I feel that anyone looking at this and thinking "oh that's cool" should also try installing Stellarium... - Source: Hacker News / over 2 years ago
The project website is at http://stellarium.org/. There is no need to have images inside a project repository. Every maintainer already knows what it looks like. What next? Marketing materials? - Source: Hacker News / almost 3 years ago
Tracking Agentmemory since Jun 2026.
When comparing Stellarium and Agentmemory, you can also consider the following products.


Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client
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A window to the stars has never been more beautiful and easy to use.
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Sky Map (formerly the Google Sky Map) turns your Android-powered mobile phone into a window on the...
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Persistent memory from agent trace, not just conversation
Compare Memori to Stellarium or Agentmemory: