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

Mem0
Memori
Agentmemory
Supermemory
Tempreon
cognee
TheSecondBrain.dev
Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client

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 | chainmemory.ai |
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In their own words, as submitted to SaaSHub.


No description of Stellarium yet.
ChainMemory gives your AI agents persistent memory that belongs to YOU — not to a single vendor. Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored...
What each product offers, as listed by its team.


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 ChainMemory. 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 ChainMemory since Jul 2026.
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Persistent memory for Claude Code, Codex & coding agents
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