Syq
copy files between machines fast (better than rsync)
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I got frustrated with the slowness of rsync and made an alternative that works faster by using multiple parallel connections, direct encrypted TCP when available, and other optimizations. I also added cool features like the ability to maintain a persistent ssh connection to the server for fast one-offs, the ability to download to your laptop while working in an ssh shell on a server, and the ability to do direct remote-remote transfers without forwarding your ssh agent (by using restricted ssh keys on the receiver that will only execute a specific request signed with the key on your laptop). It is also designed to be more robustly/flexibly scriptable than alternatives.
HN · launched Sep 10, 2026 · 41 upvotes (top 17%) · 0 views
Niche: file conversion and transfer utilities · 152 launches, 7 in the last 7 days ▼ -30% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 152 launches in file conversion and transfer utilities →
Could you build this?
No Writing a high-performance network file synchronization tool that outperforms rsync requires advanced systems programming, custom network protocols, and low-level concurrency.
What it would actually take: A production implementation requires Rust or Go with low-level socket multiplexing, zero-copy I/O (splice/sendfile), and custom delta-transfer algorithms (rolling hashes like Rabin-Karp or xxHash). The core challenge is designing a parallelized encrypted transport protocol that maximizes link saturation, handles NAT traversal or reverse SSH tunnels smoothly, and reliably resumes interrupted block transfers across heterogeneous file systems. This demands deep systems-level knowledge of networking, operating system I/O primitives, and filesystem metadata.
Discussion
20 comments analyzed.
Competitors mentioned: rclone, rsync, btrfs send, MPTCP
Concerns raised: Benchmarks use synthetic data, not production workloads, Single TCP connection throughput limitations not adequately explained, 10x speed claims seem unrealistic on gigabit links, Lacks clear technical explanation of optimizations upfront, Positioning as 'better than rsync' may be overstated
Feature requests: Automatic adaptive optimization without special flags or config, Handle mixed workloads (tiny files, huge files, encrypted data), Multiple TCP connections/multiplexing for higher bandwidth
Competitors
Other products that read as similar to this one : 213 launches clear the similarity bar, closest 8 shown.
Attention rank: #32 of 214 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 315 days after the earliest competitor.
- SSH Quick Commands · ph · 2026-09-25 · 1 upvotes · similarity 0.46
- Byteport - Transfer Large Files 2-10x Faster than TCP · yc · 2026-03-02 · 17 upvotes · similarity 0.46
- WarpSend · ph · 2026-09-23 · 1 upvotes · similarity 0.45
- SSH Command · ph · 2026-10-20 · 1 upvotes · similarity 0.44
- BranchShell · ph · 2026-10-31 · 1 upvotes · similarity 0.44
- byosynch · ph · 2026-09-13 · 1 upvotes · similarity 0.43
- Ripton Cloud · ph · 2026-10-29 · 2 upvotes · similarity 0.43
- Easy SSH · ph · 2026-10-16 · 1 upvotes · similarity 0.43
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