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frp vs sish: catalog facts
frp	sish
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Linux, Self-hosted, Command line
Connects a client behind NAT with a reachable server.	Works with the standard SSH client, no extra software HTTP, WebSocket and TCP tunnels plus SNI routing
Requires configuring a server and protecting exposed services.	Needs a public server and domain to self-host Configuring DNS and certificates takes some effort
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: Apache-2.0	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.