wolfSSH
wolfssl.com
Spec sheet
- Purpose
- wolfSSH is a lightweight SSHv2 client and server library written in ANSI C for embedded, RTOS, and resource-constrained environments.Read 7 Oct 2026 · wolfssl.com
- Platforms
- Listed operating environments include Windows, Linux, Mac OS X, Solaris, FreeBSD, embedded Linux, Zephyr, FreeRTOS, ThreadX, and VxWorks.Read 7 Oct 2026 · wolfssl.com
- Support
- wolfSSL offers public support forums and a ticket system, and says submitting [email protected] creates a ticket.Read 7 Oct 2026 · wolfssl.com
- Headquarters
- Edmonds, Washington, USARead 28 Sep 2026 · wolfssl.com
- Company
- wolfSSL says it is based in Bozeman, Montana, Seattle, Washington, and Portland, Oregon, and dates its founding to 2004.Read 7 Oct 2026 · wolfssl.com
- Authentication
- Client authentication options include RSA and ECC public keys, passwords, and keyboard-interactive authentication.Read 7 Oct 2026 · wolfssl.com
- Cryptography
- wolfSSH is powered by wolfCrypt and lists support for hybrid post-quantum use with ML-KEM, Curve25519, Ed25519, Curve448, Ed448, RSA, DH, and ECC.Read 7 Oct 2026 · wolfssl.com
- File transfer
- It supports SCP and SFTP file transfer.Read 7 Oct 2026 · wolfssl.com
- Interoperability
- The product page says wolfSSH has been interoperability tested against OpenSSH, Tera Term, PuTTY, Dropbear, FileZilla, and Bitvise.Read 7 Oct 2026 · wolfssl.com
- Licensing
- wolfSSH is dual licensed under GPLv3 and commercial licensing; businesses redistributing it in proprietary products are directed to commercial licensing inquiries.Read 7 Oct 2026 · wolfssl.com
- Remote access
- Features include basic shell support, remote command execution, and port forwarding.Read 7 Oct 2026 · wolfssl.com
- Small footprint
- The product page lists a minimum footprint of 33 kB and runtime memory usage between 1.4 and 2 kB, excluding a configurable receive buffer.Read 7 Oct 2026 · wolfssl.com
- Support limits
- The Basic, Standard, and Premium packages list 3, 10, and unlimited support incidents respectively, while the 24x7 & Long Term Support package lists long-term support.Read 7 Oct 2026 · wolfssl.com
Plans and prices
Open source GPLv3 Free GPLv3 terms apply Read 7 Oct 2026 · wolfssl.com
Basic support $2,600 a year 1 year 3 support incidents · Email only · 3 business day response Read 7 Oct 2026 · wolfssl.com
Standard support $8,500 a year 1 year 10 support incidents · Email only · 1 business day response Read 7 Oct 2026 · wolfssl.com
Premium support $28,500 a year 1 year Unlimited incidents · Email or phone · 4 business hour response · Dedicated support engineer Read 7 Oct 2026 · wolfssl.com
24x7 & Long Term Support $50,000 a year 1 year Long term support · Target hardware added to nightly CI tests Read 7 Oct 2026 · wolfssl.com
Commercial license Priced on request Commercial licensing available; contact wolfSSL for inquiries Read 7 Oct 2026 · wolfssl.com
Where Specifiction places it
- SSH Server Software#18 of 347.8
Alternatives to wolfSSHAll alternatives →
Bastillion From $12.42/mo · Free plan 8.9 Visit 
Cloudflare Access From $7/mo · Free plan 8.9 Visit 
Tailscale From $1/mo · Free plan 8.8 Visit 
Bitvise SSH Server From $1.66/mo · Free plan 8.6 Visit 
BeyondTrust Privileged Remote Access 8.5 Visit 
CoreSSH Server From $8.25/mo · Free plan 8.4 Visit