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Top 14 C++ Bittorrent Projects
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aria2
aria2 is a lightweight multi-protocol & multi-source, cross platform download utility operated in command-line. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.
Project mention: Faster and More Reliable Hugging Face Downloads Using aria2 and GNU Parallel | dev.to | 2025-03-22aria2: A lightweight multi-protocol & multi-source command-line download utility.
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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Project mention: Netflix will show generative AI ads midway through streams in 2026 | news.ycombinator.com | 2025-05-15
qbittorrent (qT) is a great client with equally great search capabilities. you'll want to install jackett along with it so you can search through a large swath of torrent sites from the qT search.
https://www.qbittorrent.org/
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Project mention: Building a BitTorrent client from the ground up in Go | news.ycombinator.com | 2025-02-24
It's not impossible, it's just hard to be better than libtorrent, otherwise a new client only makes sense as an exercise.
Arvid Norberg is hardly a "beginner developer", yet look how hard it is to make a performant implementation of uTP: https://github.com/arvidn/libtorrent/issues/3542
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Project mention: Why is there no P2P streaming protocol like BitTorrent? | news.ycombinator.com | 2025-04-14
Bittorrent already works fine for streaming:
https://github.com/johang/vlc-bittorrent/
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ Bittorrent discussion
C++ Bittorrent related posts
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Windows Memory Mapped File IO
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RCE Vulnerability in QBittorrent
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QBittorrent: Open-Source, Lightweight, and Feature-Rich BitTorrent Client
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QBittorrent: Lightweight, Open Source BitTorrent Client with No Ads
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New release for rTorrent after 5 years
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RTorrent Release Version 0.10.0
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Running Man E683 <Suk Jin's Early 60th Birthday Trip> | 231210
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A note from our sponsor - InfluxDB
www.influxdata.com | 16 Jul 2025
Index
What are some of the best open-source Bittorrent projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | aria2 | 38,158 |
| 2 | qBittorrent | 32,023 |
| 3 | qBittorrent-Enhanced-Edition | 23,006 |
| 4 | libtorrent | 5,603 |
| 5 | rtorrent | 4,476 |
| 6 | btfs | 3,923 |
| 7 | picotorrent | 2,700 |
| 8 | libutp | 1,132 |
| 9 | vlc-bittorrent | 443 |
| 10 | porla | 245 |
| 11 | libtorrent4j | 238 |
| 12 | openwebtorrent-tracker | 76 |
| 13 | Envy | 52 |
| 14 | server | 51 |
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