Sunshine
Games
Remote game stream host for Moonlight with support up to 120 frames per second and 4K resolution.
Actively maintained
Real momentum
GPL-3.0
Every open-source games project we track, scored on maintenance, momentum and licence — so you can tell the live competitors from the abandoned repositories.
Games has 40 open-source implementations in this dataset, of which 20 show real momentum and 4 are dormant or abandoned. The leader is Sunshine with 40k stars against a category median of 910 — roughly 44x the typical project. Saturation score 67/100: Crowded. Free, maintained alternatives already dominate this category.
Assume every prospect can find a free version in five minutes. Your wedge has to be something open source structurally cannot deliver: compliance, support SLAs, managed hosting at scale, or a workflow the maintainers refuse to build.
The practical test in this category: Sunshine is the reference implementation at 40k stars, and 20 of 40 projects are still shipping. A buyer evaluating you will find at least one maintained free option, so your pricing and positioning have to answer "why not self-host Sunshine?" in the first minute.
Games
Remote game stream host for Moonlight with support up to 120 frames per second and 4K resolution.
Games
Factorio-like tower defense game. Build production chains to gather more resources, and build complex facilities.
Games
Ad-less chess server powering lichess.org, with official iOS and Android client apps.
Games
Voxel game engine (formerly Minetest). Play one of our many games, mod a game to your liking, make your own game, or play on a multiplayer server.
Games
ROM manager for organizing, enriching, and playing retro games, with support for 400+ platforms.
Games
Management panel for game servers, with an intuitive UI for end users.
Games
Minimalist text adventure game for your browser.
Games
Transport tycoon simulation game.
Games
The Battle for Wesnoth is an Open Source, turn-based tactical strategy game with a high fantasy theme, featuring both singleplayer and online/hotseat multiplayer combat.
Games
CLI tool for deployment and management of dedicated game servers on Linux: more than 120 games are supported.
Games
Multiplayer RPG. Open-source game inspired by Cube World, Legend of Zelda, Dwarf Fortress and Minecraft.
Games
Web application for easy management of game servers, offering a user-friendly interface for deploying, configuring, and managing servers, server monitoring tools, and extensive customization options (
Games
Private cloud game library distribution server + frontend/launcher.
Games
Add network play functionality to Rockstar North's Grand Theft Auto game series, in which this functionality is not originally found.
Games
Game server management panel designed for both small networks and game server providers.
Games
Competitive top-down shooter blending Counter-Strike with Hotline Miami. Runs on Linux, Windows, MacOS and the Web.
Games
Video game library manager with automatic scanning, web access, downloads, and plugin support.
Games
Quiz game platform, designed for smaller self-hosted events (alternative to Kahoot!).
Games
Game ROM manager with a built-in web-based emulator using multiple sources to identify and provide metadata.
Games
LAN Party game caching made easy.
Games
Nintendo Switch library manager, with automated management tasks (file identification and organization, missing updates/DLC), serving your library to multiple supported clients on your Switch, with sh
Games
Open Source on Springrts engine. Zero-K is a traditional real time strategy game with a focus on player creativity through terrain manipulation, physics, and a large roster of unique units - all while
Games
Cooperative platformer version of DDRace, a Teeworlds modification featuring unique cooperative gameplay.
Games
Game distribution platform, designed for distributing and sharing DRM-free games efficiently (alternative to Steam, GameVault).
Games
Geography multiplayer game.
Games
A web-based pictionary game.
Games
Modern game server management panel. Deploy, monitor, and manage Minecraft, Hytale, and other game servers with industry-leading performance.
Games
Arena first-person shooter similar to Unreal Tournament.
Games
An open-source 2D battle royale game inspired by surviv.io.
Games
Cross-platform Minecraft server manager.
Games
Admin, ban, and communication management system for games running on the Source engine.
Games
Organize, download, and play DRM-free games from your own server, complete with metadata enrichment and user-friendly interface.
Games
Easy-Wi is a Web-interface that allows you to manage server daemons like gameservers. In addition it provides you with a CMS which includes a fully automated game- and voiceserver lending service.
Games
Minecraft launcher and manager that allows users to start and administer Minecraft servers from a user-friendly interface.
Games
Server for openspades, the first-person shooter in a destructible voxel world.
Games
Game Administration Panel for managing game servers on Linux and Windows.
Games
Sync games and save files across multiple devices.
Games
Clone of 2048 game in 3D.
Games
Cross-platform real-time strategy game of ancient warfare.
Games
Create a virtual game room around a connected buzzer (documentation in French).
100 maintained · leader Mastodon
58 maintained · leader Dify.ai
40 maintained · leader revealjs
36 maintained · leader Jellyfin
28 maintained · leader copyparty
29 maintained · leader Strapi
Existence is not competition. A project competes with you only if it is maintained, findable, deployable by your buyer and licensed for their use. Most projects fail at least one of those tests. Run all four before you shelve an idea — or before you assume you have a clear run.
Stars are a lifetime counter with no decay, so a project abandoned in 2022 still looks like a leader in 2026. In this dataset 149 projects are dormant, abandoned or archived, and several of them sit in the top decile by stars. Sort by momentum and commit activity instead — popularity tells you the project was once interesting, maintenance tells you whether it will still be there when your customer needs a bug fixed.
When a prospect says 'we could just self-host the free one', they are usually comparing your price against zero. The real comparison is your price against hosting, upgrades, backups, security patching, integration work and the engineer hours behind all of it. Quantifying that number is the single most effective response to a free-alternative objection — and it is more persuasive coming with a spreadsheet than with a feature list.
Founders treat licensing as a legal footnote and then discover it dictates strategy. Permissive licences allow closed commercial forks, which is why so many managed services exist around MIT and Apache projects — and also why your differentiation cannot be the code itself. Copyleft licences, especially AGPL, remove the closed-wrapper option entirely, which reduces competition but restricts you too. Source-available licences exist precisely to stop the wrapper business.
Search this database by category and by the commercial product you would replace. It covers 1665 projects across 130 categories, each mapped to the paid tool it substitutes. If your category shows a "Crowded" verdict, a maintained free version almost certainly exists and your positioning has to account for it.
No. It means free is your price anchor. Plenty of large companies were built next to a good open-source project — the ones that failed were the ones selling the same job at a price the free tool made indefensible. Find the part of the job the project deliberately does not do, and sell that.
Each category gets a 0–100 score built from three inputs: how many implementations exist, what share of them are still actively maintained, and how far ahead the leading project is compared with the category median. 62+ is Crowded, 38–61 Contested, under 38 Open. 11 categories are Crowded and 88 are Open.
A project has momentum when it committed code in most of the last twelve months, shipped a release recently and is not archived. 736 of 1665 projects qualify. This is the single most useful filter here — it strips out the popular-but-dead repositories that make a category look more competitive than it is.
It depends entirely on the licence. MIT, Apache and BSD let you build and sell closed products on top. GPL and AGPL require derivative work to stay open, and AGPL extends that to network use, which blocks most SaaS wrappers. BSL, SSPL and Commons Clause are source-available, not open source, and usually restrict competing commercial use outright.
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