wolfSSH
wolfSSH: An open-source, self-hosted SSH library for embedded products and portable systems. Ranked #14 of 34 in SSH Server Software by our editors (7.8/10); pricing: Free plan; best for embedded SSH implementations.
At a glance
- Editor score7.8 / 10
- PricingFree plan
- Best forEmbedded SSH implementations
- Free planYes
- Paid from$2,600/yr
- DeploymentSelf-hosted
- Facts checked21 Sep 2026
Where it wins
- SSHv2 client and server support with SCP and SFTP version 3
- C API, hardware cryptography acceleration, and post-quantum hybrid exchange
- Supports RTOS, embedded Linux, desktop platforms, and BSD systems
Where it doesn't
- Commercial support starts at $2,600 annually
- Basic and Standard Support plans are email-only
- 24x7 & Long Term Support costs $50,000 annually
Our verdict on wolfSSH
wolfSSH is an ANSI C implementation of an SSHv2 client and server library from wolfSSL Inc. It is designed for embedded, RTOS, resource-constrained, and standard operating environments. Teams can integrate it into self-hosted products and applications that need secure shell access, SCP or SFTP transfers, remote command execution, port forwarding, and several authentication methods. Its supported environments include Linux, Windows, macOS, BSD, embedded Linux, and a broad range of embedded platforms and RTOS options.
Its strongest fit is embedded integration. The C language API supports product-level incorporation, while hardware cryptography acceleration and post-quantum hybrid key exchange address specialized implementation needs. Authentication options include passwords, keyboard-interactive methods, public keys, and X.509 certificates, with CA-root certificate validation available. wolfSSH also connects with wolfCrypt, wolfSSL, wolfTPM, and wolfBoot, giving teams using that ecosystem a clearer path to related cryptographic, TLS, TPM, and boot components.
wolfSSH is freely downloadable under GPLv3, while its published paid tiers are annual support and maintenance packages. Basic Support costs $2,600 per year and includes email-only support, three support incidents, and a three-business-day response time. Standard Support costs $8,500 per year with 10 incidents and a one-business-day response time. Premium Support costs $28,500 per year and adds phone support, unlimited incidents, a four-business-hour response time, and a dedicated support engineer. The $50,000-per-year 24x7 & Long Term Support plan adds 24x7 support, long-term support, and target hardware in nightly CI tests. Choose wolfSSH when embedded portability, a C API, and SSH feature coverage matter; consider another option if low-cost commercial support or a simpler deployment model is the priority.
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wolfSSH pricing
All 4 wolfSSH plans and prices →
wolfSSH fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $2,600/yr |
| Deployment | Self-hosted |
| Supported platforms | Win32/64, Linux, macOS, Solaris, ThreadX, VxWorks, FreeBSD, NetBSD, OpenBSD, embedded Linux, Yocto, OpenEmbedded, Cesium, Micrium µC/OS, FreeRTOS, SafeRTOS, Freescale MQX, Nucleus, Green Hills INTEGRITY, Zephyr |
| MFA support | Not verified |
| SSH certificate auth | Yes |
| Concurrent sessions | Not verified |
| Audit logging | Not verified |
| Access controls | users, passwords, public keys, keyboard-interactive authentication, CA-root certificate validation |
| Deployment | Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Email, Tickets, Community, Phone, Docs · 24/7 |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: wolfCrypt, wolfSSL, wolfTPM, wolfBoot |
| Pricing | Free plan (source) |
| Website | wolfssl.com |
| Facts checked | 21 Sep 2026 |
wolfSSH integrations
wolfSSH lists 4 integrations on its own site.
- wolfCrypt
- wolfSSL
- wolfTPM
- wolfBoot
Alternatives to wolfSSH
- OpenSSHA broad, open-source SSH toolkit for remote login, file transfer, forwarding, and key management.9.4
- DropbearA 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 wolfSSH alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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