GrapheneOS
LineageOS
Android
e.foundation /e/
postmarketOS
Ubuntu Touch
DivestOS
Privacy-focused operating system for smartphones based on Android and microG

CodeMap4AI
Sourcegraph
Codebase Understanding for AI Coding Agents

Which is more popular?
Based on our record, CalyxOS seems to be more popular. It has been mentioned 191 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
COS
CalyxOS
|
|
|
|---|---|---|
| Website | calyxos.org | constellationdev.io |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of CalyxOS yet.
AI coding agents waste most of their context window grepping files and guessing at code structure. Constellation gives them a persistent, team-wide knowledge graph of your codebase (symbol search, dependency graphs, impact analysis) delivered via MCP so every token goes toward reasoning, not...
What each product offers, as listed by its team.

Possible disadvantages
No features have been listed yet.
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.
CalyxOS Review: The Private & Secure Android ROM For Everyone!
More videos
No ConstellationDev videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using CalyxOS and ConstellationDev. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

It ships with Signal for encrypted messaging; Tor browser to access the web without any tracking; a free and trusted VPN from the Calyx Institute; the open-source Aurora Store, a Play Store alternative, and more....
We have no reviews of ConstellationDev yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

I use pixel 3 with https://calyxos.org/ as a home phone to play music, record videos, pictures etc. Calyxos is still providing extended support for 4a, but microG doesn't work as well compared to sandboxed google play services on... - Source: Hacker News / almost 2 years ago
For example https://androidauthority.com/grapheneos-3287030/ > "Even if you stomach the Pixel-only requirement" I have not and will not stomach that at all, nope! https://grapheneos.org/faq#supported-devices Nope! I wasn't paying... - Source: Hacker News / over 2 years ago
I'm sure you did your research. I'm writing for other readers who are interested. There are a few alternatives, more can be found but this is a selection of the most prominent offerings. /e/OS: https://e.foundation/e-os/ GrapheneOS:... - Source: Hacker News / almost 3 years ago
Tracking ConstellationDev since Apr 2026.
When comparing CalyxOS and ConstellationDev, you can also consider the following products.

GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
Compare GrapheneOS to CalyxOS or ConstellationDev:

AI tools guess less when they see the full picture. CodeMap4AI builds a structured map of your codebase. Try it free.
Compare CodeMap4AI to CalyxOS or ConstellationDev:

Operating system for smartphones and tablet computers, based on the Android
Compare LineageOS to CalyxOS or ConstellationDev:

The context layer for your entire codebase
Compare Sourcegraph to CalyxOS or ConstellationDev:

Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
Compare Android to CalyxOS or ConstellationDev:

/e/ is a fork of LineageOS that aims to be completely free of everything Google.
Compare e.foundation /e/ to CalyxOS or ConstellationDev: