Software · Internet & communication

Interstellar

Interstellar is a messaging program, available on Windows, Linux and Android.

Completely free
Windows, Linux and Android
Open source

Ad-supported exit link (Clictune): an intermediate page may show for a few seconds before the official website. Direct link to the website, no intermediate page

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: AGPL-3.0 — Open source (copyleft)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Official plan pages (pricing, licence, terms), Flathub
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows, Linux and AndroidEstablished by Android: Unspecified source · Linux: Flathub, Unspecified source · Windows: Unspecified source
Publisher: jwr1
Latest version: 0.11.4 (3 June 2026)
Latest activity: 10 June 2026
Source code: github.com/interstellar-app/interstellar

At a glance

Interstellar is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (AGPL-3.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
Commercial use allowed

About

Interstellar is a fediverse client, allowing you to access your Mbin/Lemmy/PieFed accounts and interact with your favorite communities.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 10 November 2026
Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 9 November 2026
Facts collected from Unspecified source (platforms) — 9 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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