Open source focus

Open Source Alternatives to Telegram

7 open source Communication options similar to Telegram, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Signal9
MessagingWashington, United States
End-to-end encrypted messaging and voice calling app focused on privacy and security.
Open source
Mastodon51
Social MediaJena, Germany$63.0M
A decentralized, open-source social media platform and alternative to larger apps like X and Threads.
Open source · Self-hostable
Open Source Endowment45
Open SourceSan Francisco, United States$750K
A nonprofit endowment aiming to permanently solve the funding problem for open-source software maintainers.
Open source · Self-hostable
FxTwitter31
Open Source
Open-source tool to fix and enhance Twitter/X embeds on Discord, Telegram, and other platforms.
Open source · Self-hostable
Lemmy23
Social Media
A decentralized, open-source social link aggregator and discussion platform for communities.
Open source · Self-hostable
Linux Foundation15
Open SourceSan Francisco, USA
A non-profit technology consortium supporting the development of Linux and other open-source software projects.
Open source · Self-hostable
Cloud Native Computing Foundation15
Cloud ComputingIrvine, United States
The Cloud Native Computing Foundation (CNCF) is an open-source software foundation that aims to make cloud-native computing universal and sustainable.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
SignalEnd-to-end encrypted messaging and voice calling app focused on privacy and security.	Messaging	Open source	Washington, United States	—	9
MastodonA decentralized, open-source social media platform and alternative to larger apps like X and Threads.	Social Media	Open source · Self-hostable	Jena, Germany	$63.0M	51
Open Source EndowmentA nonprofit endowment aiming to permanently solve the funding problem for open-source software maintainers.	Open Source	Open source · Self-hostable	San Francisco, United States	$750K	45
FxTwitterOpen-source tool to fix and enhance Twitter/X embeds on Discord, Telegram, and other platforms.	Open Source	Open source · Self-hostable	—	—	31
LemmyA decentralized, open-source social link aggregator and discussion platform for communities.	Social Media	Open source · Self-hostable	—	—	23
Linux FoundationA non-profit technology consortium supporting the development of Linux and other open-source software projects.	Open Source	Open source · Self-hostable	San Francisco, USA	—	15
Cloud Native Computing FoundationThe Cloud Native Computing Foundation (CNCF) is an open-source software foundation that aims to make cloud-native computing universal and sustainable.	Cloud Computing	Open source · Self-hostable	Irvine, United States	—	15