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Capsule – E2E encrypted file sharing

Capsule – E2E encrypted file sharing

by seanathan·Jul 7, 2026·2 points·0 comments
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AI Analysis

●MidShip ItCozy

Wormhole.app alternative in Rust, but encrypted file sharing is already solved.

Strengths
  • •Full-stack Rust implementation with web, CLI, and Android clients from one developer.
  • •E2E encryption handled entirely in the browser before upload.
  • •Self-hostable with AGPL license for teams needing data control.
Weaknesses
  • •100 MB file limit is restrictive compared to competitors offering more.
  • •No clear differentiation from Wormhole, Firefox Send, or Magic Wormhole.
Category
Open Source
Target Audience

Developers and privacy-conscious users needing quick file transfers

Similar To

Wormhole.app · Firefox Send · Magic Wormhole

Post Description

Capsule started as a basic HTTP server to teach myself Rust.

Then I kept going, and it turned into the first full-stack thing I've fully shipped: a Rust/Axum server, a Rust CLI, an Android app (my first, same story as the Rust one), and a fully featured web UI. It quickly grew as I realized I could solve my file transfer problem by turning a basic webserver into an actual daily use tool.

Entire project is open source, code can be found at: https://github.com/withcapsule/

Would love to hear anyone's thoughts on this.

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