Top Open Source Alternatives to Popular SaaS Apps

Discover open-source apps categorized by the SaaS tools they replace. Find high-quality, free alternatives to your favorite software.

Firebase

Comprehensive platform for building, deploying, and managing mobile and web applications with various integrated tools.

8 Open Source Alternatives to Firebase

Microsoft OneNote

A digital note-taking app that allows users to create, organize, and share notes across devices, enhancing productivity and collaboration.

8 Open Source Alternatives to Microsoft OneNote

Obsidian

A powerful knowledge management and note-taking application that uses Markdown files to help users organize and connect their thoughts.

7 Open Source Alternatives to Obsidian

Unreal Engine

A powerful game engine known for its high-fidelity graphics and versatility in creating interactive experiences across various industries.

7 Open Source Alternatives to Unreal Engine

AWS Amplify

AWS Amplify is a development platform that enables developers to build fullstack web and mobile applications quickly by leveraging various AWS services.

6 Open Source Alternatives to AWS Amplify

Bubble

Bubble is a no-code development platform that allows users to create web applications through a visual interface without writing traditional code.

6 Open Source Alternatives to Bubble

ChatGPT

ChatGPT is an AI-powered conversational agent developed by OpenAI, designed to engage users in natural language conversations.

6 Open Source Alternatives to ChatGPT

Claude AI

Claude is an AI assistant developed by Anthropic, designed to engage in natural language conversations and perform a wide range of tasks.

6 Open Source Alternatives to Claude AI

Google Gemini

Google's advanced multimodal AI model designed for a wide range of applications, enhancing capabilities across various platforms.

6 Open Source Alternatives to Google Gemini

Heroku

Heroku is a platform as a service (PaaS) that enables developers to build, run, and operate applications entirely in the cloud.

6 Open Source Alternatives to Heroku

Microsoft PowerApps

A low-code application development platform that enables users to build custom business apps without extensive coding knowledge.

6 Open Source Alternatives to Microsoft PowerApps

Reddit

Reddit is a popular social news aggregation and discussion platform where users can share content, engage in discussions.

6 Open Source Alternatives to Reddit