Cenkalti Rain by cenkalti
BitTorrent client and library in Go
About Cenkalti Rain
From the project's README at github.com/cenkalti/rain. Lightly cleaned for readability; for the full source see the upstream repo.
High-performance BitTorrent client and library in Go. Running in production at [put.io][putio-link] since 2019, processing thousands of torrents daily with minimal system resources.
[][docs-link] [](https://github.com/cenkalti/rain/releases) [](https://coveralls.io/github/cenkalti/rain) [](https://goreportcard.com/report/github.com/cenkalti/rain)
Protocol Support BEP-003: Core protocol BEP-006: Fast extension BEP-009: Magnet links BEP-012: Multiple trackers BEP-015: UDP trackers BEP-005: DHT BEP-011: PEX BEP-019: WebSeed Message stream encryption Client Features Fast resuming with BoltDB persistence IP blocklist support JSON-RPC 2.0 server & client Interactive console UI Tools for creati
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 1.1k | github.com/cenkalti/rain |
| GitHub forks | 84 | github.com/cenkalti/rain |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 12.0 years | since May 2014 |
| Last commit | 23 days ago | Apr 13, 2026 |
| Releases shipped | 160 | last: 3 months ago |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
What people say on Hacker News
Ready to self-host Cenkalti Rain?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
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