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Affine vs Outline

Learn how Affine and Outline differ in their key features, development activity, technology stack and community adoption, so you can decide which of these collaborative notes & wikis is best for you.

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Favicon of Affine

Affine

An open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.
  • Stars


    69,721
  • Forks


    4,971
  • Last commit


    21 hours ago
  • Repository age


    4 years
  • Self-hosted


    Yes
View Repository
Screenshot of Affine
Favicon of Outline

Outline

Team knowledge base with real-time collaboration, AI-powered search, Slack integration, and self-hosting support for internal docs and wikis.
  • Stars


    39,049
  • Forks


    3,365
  • Last commit


    11 hours ago
  • Repository age


    10 years
  • Self-hosted


    Yes
View Repository
Screenshot of Outline

Detailed Comparison

Both Affine and Outline have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, activity, technology, maturity and features when making your decision.

Affine wins
Community & Popularity

Affine leads in popularity with 69,721 stars vs 39,049 stars for Outline. The 79% higher star count indicates stronger community adoption. In terms of developer contributions, Affine has 4,971 forks, indicating strong developer engagement.

Comparable
Development Activity

Both projects show recent activity, with Affine last updated 21 hours ago and Outline 11 hours ago.

Comparable
Technology Stack

Both tools share common technology foundations, being built with JavaScript, Typescript, JSX. However, they differ in their additional technology choices: Affine uses CSS, Bash, Rust, C, Objective-C, Java, Ruby, Swift, Kotlin.

Outline wins
Project Maturity

Outline has been in development longer, starting 10 years ago, compared to Affine which began 4 years ago. This 6.3-year head start suggests Outline may have more mature features and established processes.

Comparable
Use Cases & Features

Both tools serve similar use cases in Collaborative Notes & Wikis. However, they also have distinct specializations: Affine also focuses on Collaborative Workspaces, Whiteboarding while Outline extends into Wiki Software, Internal Knowledge Bases.

Comparable
Hosting & Deployment

Both Affine and Outline offer self-hosting capabilities, giving you full control over your data and infrastructure.