TinySSH

At a glance

• Editor score
  8.0 / 10
• Pricing
  Open source
• Best for
  Minimal, security-focused SSH servers
• Paid from
  Free
• Deployment
  Self-hosted
• Founded
  2014
• Facts checked
  21 Sep 2026

• Where it wins

  • Public-key authentication with Ed25519 host-key support
  • Modern cryptography including Curve25519 and ChaCha20-Poly1305
  • Fixed-size buffers and static memory allocation for small deployments

• Where it doesn't

  • Implements only a subset of SSHv2
  • Does not support password or host-based authentication
  • Unix and Debian focus limits platform breadth

Our verdict on TinySSH

TinySSH is an open-source, self-hosted SSH server for Unix systems and Debian environments. It implements a subset of SSHv2 and is aimed at small, auditable deployments that prioritize a narrow security-focused design over broad administration features. Access control centers on public-key authentication, authorized_keys, and a server key directory, making it a fit for operators who can manage key-based access and do not need password authentication.

Its technical profile emphasizes constrained resource use and modern cryptography. TinySSH uses fixed-size SSH packet buffers and static memory allocation, while avoiding a dependency on OpenSSL. Published capabilities include Ed25519 host keys, Curve25519 key exchange, ChaCha20-Poly1305 encryption, and post-quantum hybrid key exchange algorithms. These features give the server a focused cryptographic and memory-management profile, although the project is described as a beta release. Organizations seeking a mature, feature-rich administrative layer may prefer a broader SSH server instead.

Deployment is self-hosted and can connect through inetd, tcpserver, BusyBox tcpsvd, or systemd sockets. That integration model suits Unix environments where socket activation or a lightweight service wrapper is already part of the system design. TinySSH is open source, so its pricing model is straightforward: there is no paid tier structure to compare. Choose it for minimal installations that value small scope, key-based access, and auditable resource behavior. Choose an alternative when you require password or host-based authentication, a full SSHv2 feature set, or wider platform coverage.

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TinySSH pricing

TinySSH fact sheet

TinySSH integrations

TinySSH lists 4 integrations on its own site.

• inetd
• tcpserver
• BusyBox tcpsvd
• systemd sockets

Alternatives to TinySSH

• OpenSSHA broad, open-source SSH toolkit for remote login, file transfer, forwarding, and key management.9.4
• DDropbearA free, compact SSH server for lean self-hosted Unix and Cygwin deployments.9.2
• CoreSSH ServerA self-hosted SSH/SFTP server with strong administration and access controls.9.0

See all TinySSH alternatives →

Featured on iTechGuides

TinySSH is listed in our SSH Server Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update