What tech stacks are most popular among high-growth SaaS?

Next.js, TypeScript, Tailwind CSS, PostgreSQL (via Supabase), and Python remain the top-ranked foundation for 2026 indie startups, optimizing for rapid development, type safety, and global edge deployment.

How do developers claim and edit existing product listings?

If your product is already cataloged, click 'Claim This Product' on its details panel. Verifying any mailbox on your product's domain unlocks full editing rights, analytics, and instant updates.

Does SaaSearch provide an API or llms.txt feed for AI agents?

Yes! SaaSearch provides standardized llms.txt, llms-full.txt, and structured JSON-LD feeds at /llms.txt for AI agents, Perplexity, and ChatGPT search citations.

What is the difference between Freemium and Open Source listings?

Freemium products provide a hosted free tier with optional paid upgrades, while Open Source tools typically provide full source code repositories and self-hosting options.

SaaSearch - The Search Engine for SaaS and AI products

46 products for Open source developer tools (0.05 seconds)

Pen

https://pen.dev›design & creative›Pen

Pen: An agentic canvas for building bold software. - result 1

Sep 17, 2026 - Pen is an innovative agentic canvas designed for rapidly building and prototyping software. It allows users to import components from any app,... Read more

5.0(1)1upvote

AI Design UI/UX Design Prototyping

1pen

Cortex

https://cortexdocs.dev›developer tools›Cortex

Cortex: The open-source API knowledge layer for developers and AI agents. - result 2

Sep 14, 2026 - Cortex is an open-source platform designed to unify and streamline API delivery by transforming various API specifications (OpenAPI, GraphQL,... Read more

5.0(1)1upvote

API Management SDK Generation Developer Documentation

1cortexdocs

OpenSAS

https://kirha.com›developer tools›OpenSAS

OpenSAS: An open-source, SAS 9.4-compatible interpreter built by AI agents. - result 3

Sep 9, 2026 - OpenSAS is an innovative open-source interpreter for the SAS 9.4 programming language, engineered entirely by AI coding agents. It provides... Read more

5.0(1)1upvote

SAS Interpreter Open Source AI Development

1kirha

Open Caffeine

https://github.com›developer tools›Open Caffeine

Open Caffeine: Keep your Mac awake - result 4

Jun 1, 2026 - Open Caffeine is a native macOS menu bar app for keeping your Mac awake for a chosen duration. Pick presets, set a custom timer, toggle screen... Read more

5.0(17)164upvotes

Open Source

17github

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Revinho
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Stivio
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Cinderella

https://cinderella.fyi›developer tools›Cinderella

Cinderella: Instant, transparent valuations for public GitHub projects. - result 5

Sep 2, 2026 - Cinderella offers free, instant, and transparent valuations for public GitHub repositories. It helps open-source creators and developers... Read more

5.0(1)1upvote

GitHub Open Source Project Valuation

1cinderella

SuperBased

https://superbased.app›developer tools›SuperBased

SuperBased: The local-first control plane for your AI coding agents. - result 6

Sep 18, 2026 - SuperBased is a local-first, open-source control plane designed for managing AI coding agents directly on your machine. It provides a unified... Read more

5.0(1)1upvote

AI Agent Management Developer Tools Cost Optimization

1superbased

Umami

https://umamiengine.com›analytics & data›Umami

Umami: Open-source web analytics for understanding traffic and building integrations. - result 7

Sep 18, 2026 - Umami is an open-source web analytics platform designed to help users understand their website traffic and build robust data integrations. It... Read more

5.0(1)1upvote

Web Analytics Open Source Website Traffic

1umamiengine

Pen: An agentic canvas for building bold software.

5.0(1)

Pen is an innovative agentic canvas designed for rapidly building and prototyping software. It allows users to import components from any app, integrate with leading AI models like Claude and OpenAI, and leverage AI agents for direct design and illustration. With buttery-smooth WebGL performance, advanced features like shaders, UI libraries, and HTML/CSS/Tailwind export, Pen empowers developers and designers to create complex applications, mockups, and UI elements. It offers collaborative sharing, a built-in browser for importing content, and CLI connectivity for headless design, making it a comprehensive tool for modern software creation.

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