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Mosh vs SSH3: catalog facts
Mosh	SSH3
Free Free software.	Free Free and open source under the Apache 2.0 licence.
macOS, Linux, Command line	Windows, Linux, Command line
Sessions survive IP changes and sleep Local echo reduces perceived lag	Runs remote shell sessions over HTTP/3 and QUIC Backed by a published paper and an IETF Internet-Draft
Server component must be installed on the remote host Needs UDP ports open through firewalls	Experimental research project, not a standard SSH replacement Last code change in September 2024
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: Apache-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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