Open source focus

Open Source Alternatives to Rec Room

10 open source Virtual Reality options similar to Rec Room, 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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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
Lemmy23
Social Media
A decentralized, open-source social link aggregator and discussion platform for communities.
Open source · Self-hostable
Heroic Labs47
GamingLisbon, Portugal
Social infrastructure for games, makers of Nakama game server.
Open source · Self-hostable
GDevelop7
Computer GamesLondon, GB
No-code game development platform empowering creators to build games without prior technical skills.
Open source
Comfy Org53
AI Image Generation$30.0M
Comfy is an AI creation engine for visual professionals, offering granular control over AI models, parameters, and outputs through a node-based workflow on an infinite canvas.
Open source
FxTwitter31
Open Source
Open-source tool to fix and enhance Twitter/X embeds on Discord, Telegram, and other platforms.
Open source · Self-hostable
Manyverse21
Decentralized Social Network
Manyverse is a social network client that uses a peer-to-peer protocol, allowing users to create and share content offline and without central servers.
Open source · Self-hostable
Flukegames7
Indie Game Development
Indie game studio developing and publishing games, with a focus on rhythm-action platformers and open-source tools.
Open source
Sales & Dungeons
Gaming
Turn every thermal printer into a TTRPG companion machine!
Open source · Self-hostable
Thunderbird
Email Client
Free and open-source email client for managing email, calendars, and contacts.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
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
LemmyA decentralized, open-source social link aggregator and discussion platform for communities.	Social Media	Open source · Self-hostable	—	—	23
Heroic LabsSocial infrastructure for games, makers of Nakama game server.	Gaming	Open source · Self-hostable	Lisbon, Portugal	—	47
GDevelopNo-code game development platform empowering creators to build games without prior technical skills.	Computer Games	Open source	London, GB	—	7
Comfy OrgComfy is an AI creation engine for visual professionals, offering granular control over AI models, parameters, and outputs through a node-based workflow on an infinite canvas.	AI Image Generation	Open source	—	$30.0M	53
FxTwitterOpen-source tool to fix and enhance Twitter/X embeds on Discord, Telegram, and other platforms.	Open Source	Open source · Self-hostable	—	—	31
ManyverseManyverse is a social network client that uses a peer-to-peer protocol, allowing users to create and share content offline and without central servers.	Decentralized Social Network	Open source · Self-hostable	—	—	21
FlukegamesIndie game studio developing and publishing games, with a focus on rhythm-action platformers and open-source tools.	Indie Game Development	Open source	—	—	7
Sales & DungeonsTurn every thermal printer into a TTRPG companion machine!	Gaming	Open source · Self-hostable	—	—	—
ThunderbirdFree and open-source email client for managing email, calendars, and contacts.	Email Client	Open source · Self-hostable	—	—	—