Open source focus

Open Source Alternatives to Forstarters

14 open source Developer Tools options similar to Forstarters, 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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Gitpod63
Developer ToolsTübingen, Germany$28.0M
Cloud Development Environments for efficient and secure team software development.
Open source · Self-hostable
Liblab55
Developer ToolsAustin, United States$42.0M
SDK-as-a-service platform for API providers, offering code generation and SDK management to enhance developer experience.
Open source · Self-hostable
Bubble Lab45
Artificial Intelligence
Open-source, Typescript-native agentic workflow builder for natural language to code generation.
Open source · Self-hostable
Assistant-ui43
AI Chat InterfaceSan Francisco, United States$500K
Open-source React library for building production-grade AI chat interfaces.
Open source · Self-hostable
Webpack29
Developer Tools
Open-source module bundler for JavaScript applications, transforming front-end assets into static files.
Open source · Self-hostable
Cap19
Developer ToolsSan Francisco, United States
Open-source screen recording, editing, and hosting tool with ownership of your data.
Open source · Self-hostable
esbuild14
Developer Tools
Extremely fast JavaScript bundler and minifier for the web, written in Go.
Open source · Self-hostable
I3
i313
Software Development
A highly configurable and efficient tiling window manager for X11.
Open source · Self-hostable
Maige10
Open Source
Open-source infrastructure for automating natural language workflows directly on your codebase.
Open source · Self-hostable
Snipit Good8
Developer Tools
Free and open-source Windows capture tool for instant snips, MP4 recordings, and private share links.
Open source
.NET8
Software DevelopmentRedmond, USA
A free, cross-platform, open-source developer platform for building many types of applications.
Open source · Self-hostable
Orcaforge7
3D Printing
An open-source fork of OrcaSlicer with a built-in plugin marketplace for 3D printing.
Open source · Self-hostable
Fractask7
Open Source
Open-source task tree for humans and AI, built around the Fractask method.
Open source · Self-hostable
Boringstack
Developer Tools
Pre-configured GitHub templates for building modern web applications with UI, API, and infrastructure.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
GitpodCloud Development Environments for efficient and secure team software development.	Developer Tools	Open source · Self-hostable	Tübingen, Germany	$28.0M	63
LiblabSDK-as-a-service platform for API providers, offering code generation and SDK management to enhance developer experience.	Developer Tools	Open source · Self-hostable	Austin, United States	$42.0M	55
Bubble LabOpen-source, Typescript-native agentic workflow builder for natural language to code generation.	Artificial Intelligence	Open source · Self-hostable	—	—	45
Assistant-uiOpen-source React library for building production-grade AI chat interfaces.	AI Chat Interface	Open source · Self-hostable	San Francisco, United States	$500K	43
WebpackOpen-source module bundler for JavaScript applications, transforming front-end assets into static files.	Developer Tools	Open source · Self-hostable	—	—	29
CapOpen-source screen recording, editing, and hosting tool with ownership of your data.	Developer Tools	Open source · Self-hostable	San Francisco, United States	—	19
esbuildExtremely fast JavaScript bundler and minifier for the web, written in Go.	Developer Tools	Open source · Self-hostable	—	—	14
I3i3A highly configurable and efficient tiling window manager for X11.	Software Development	Open source · Self-hostable	—	—	13
MaigeOpen-source infrastructure for automating natural language workflows directly on your codebase.	Open Source	Open source · Self-hostable	—	—	10
Snipit GoodFree and open-source Windows capture tool for instant snips, MP4 recordings, and private share links.	Developer Tools	Open source	—	—	8
.NETA free, cross-platform, open-source developer platform for building many types of applications.	Software Development	Open source · Self-hostable	Redmond, USA	—	8
OrcaforgeAn open-source fork of OrcaSlicer with a built-in plugin marketplace for 3D printing.	3D Printing	Open source · Self-hostable	—	—	7
FractaskOpen-source task tree for humans and AI, built around the Fractask method.	Open Source	Open source · Self-hostable	—	—	7
BoringstackPre-configured GitHub templates for building modern web applications with UI, API, and infrastructure.	Developer Tools	Open source · Self-hostable	—	—	—