Capacities vs Foam
Side-by-side comparison of features, pricing, ratings, and alternatives.
Capacities is a personal knowledge management app built around structured, typed objects (notes, people, projects, books, etc.) rather than a flat pile of documents. Users start from daily notes and create custom object types as needed, and the app automatically surfaces connections between related content instead of requiring manual backlinking for everything.
Foam is a free, open-source note-taking application that uses a graph database to store notes as a network of interconnected ideas. It's designed to help users create a knowledge graph, where each note is a node that can be linked to other notes, creating a web of relationships between ideas.
- Free plan has no artificial note limits and includes full export
- Object-based structure suits research and reference-heavy workflows better than plain files
- Automatic connection discovery reduces manual linking overhead
- EU hosting and GDPR compliance appeal to privacy-conscious users
- Highly customizable and extensible
- Strong focus on knowledge management
- Simple, distraction-free interface
- Free and open-source
- Exact Pro and Believer plan pricing is not published on the pricing page
- The object-based model has a learning curve compared to simple flat note apps
- Smaller company (self-funded, no VC) means a smaller ecosystem of integrations than larger note apps
- Steep learning curve
- Limited mobile support
- Not suitable for large-scale collaboration
More alternatives & similar tools
Alternatives to Capacities
View all →
Alternatives to Foam
View all →
The Verdict
AI-generated from listing dataCapacities offers a hosted, GDPR‑compliant, object‑oriented note system with a free tier and optional AI, while Foam is a free, open‑source, highly customizable desktop app with a steeper learning curve and limited mobile/collaboration features.
Key differences
- •Capacities stores data in the EU cloud with built‑in encryption and GDPR compliance; Foam is a local desktop app with no explicit privacy guarantees.
- •Capacities provides an AI assistant and query features in its paid Pro plan; Foam relies solely on community plugins and has no native AI.
- •Capacities’ object‑based model surfaces automatic connections; Foam uses a markdown‑based graph that requires manual linking.
- •Capacities offers a free plan with unlimited notes and full export; Foam is free but requires self‑hosting and manual backup.
- •Capacities has a smaller integration ecosystem; Foam benefits from a large open‑source plugin community and GitHub integration.
Pricing & value
Capacities has a freemium model with unlimited notes and export; Foam is free but requires self‑hosting and no paid upgrades.
Ease of use / learning curve
Foam’s steep learning curve is noted, while Capacities also has a learning curve but is less emphasized.
Features & depth
Capacities adds AI assistant, query filtering, and automatic connection discovery not present in Foam.
Integrations & ecosystem
Foam has many plugins, GitHub integration, and an open‑source community; Capacities has a smaller ecosystem.
Collaboration
Capacities offers cloud SaaS hosting suitable for shared access; Foam is described as not suitable for large‑scale collaboration.
Security & privacy
Capacities hosts data in the EU with encryption and GDPR compliance; Foam provides no specified privacy guarantees.
Support
Foam lists email and GitHub issue support; Capacities provides no support details in the facts.
Choose Capacities if…
Privacy‑focused researchers or writers who need cloud sync, AI assistance, and GDPR‑compliant storage.
Choose Foam if…
Tech‑savvy users who prefer open‑source, highly customizable desktop notes and are comfortable managing their own backups.
Common questions
Is there a cost to start using either tool?
Capacities offers a free plan with unlimited notes; Foam is completely free and open‑source.
Can I use the app on mobile devices?
Capacities is a cloud SaaS (mobile support not specified); Foam has limited mobile support.
How easy is it to migrate my notes out of the app?
Capacities provides full data export even on the free plan; Foam requires manual handling of markdown files.