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DropbearSSH3
Free

Free and open source under an MIT-style license.

 Free

Free and open source under the Apache 2.0 licence.

macOS, Linux, Command line Windows, Linux, Command line
  • Very small memory and disk footprint
  • Compatible with OpenSSH authorized_keys
  • Runs remote shell sessions over HTTP/3 and QUIC
  • Backed by a published paper and an IETF Internet-Draft
  • Distributed mainly as source code to compile yourself
  • Fewer features than OpenSSH
  • Experimental research project, not a standard SSH replacement
  • Last code change in September 2024
Downloadable app Downloadable app
Open source Open source
License: MIT License: Apache-2.0
No account needed No account needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked October 2, 2026

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