wolfSSH

wolfssl.com · checked 7 Oct 2026

#13 · SSH Server Software

Visit wolfssl.com ↗ Alternatives wolfSSH vs CoreSSH Server

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on SSH Server Software6.1#13 of 34

wolfSSH is a lightweight SSHv2 client and server library written in ANSI C for embedded, RTOS, and resource-constrained environments.

Pricing

Open source GPLv3GPLv3 terms applyFree
Basic support1 year · 3 support incidents · Email only · 3 business day response$2,600/yr
Standard support1 year · 10 support incidents · Email only · 1 business day response$8,500/yr
Premium support1 year · Unlimited incidents · Email or phone · 4 business hour response · Dedicated support engineer$28,500/yr
24x7 & Long Term Support1 year · Long term support · Target hardware added to nightly CI tests$50,000/yr
Commercial licenseCommercial licensing available; contact wolfSSL for inquiriesOn request

As wolfssl.com lists them, checked 7 Oct 2026.

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Facts

Website: wolfssl.com
Price: Free tier · from $2,600/yr
Free trial: Not stated
Authentication: Client authentication options include RSA and ECC public keys, passwords, and keyboard-interactive authentication.
Company: wolfSSL says it is based in Bozeman, Montana, Seattle, Washington, and Portland, Oregon, and dates its founding to 2004.
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.
File transfer: It supports SCP and SFTP file transfer.
Headquarters: Edmonds, Washington, USA
Interoperability: The product page says wolfSSH has been interoperability tested against OpenSSH, Tera Term, PuTTY, Dropbear, FileZilla, and Bitvise.
Licensing: wolfSSH is dual licensed under GPLv3 and commercial licensing; businesses redistributing it in proprietary products are directed to commercial licensing inquiries.
Remote access: Features include basic shell support, remote command execution, and port forwarding.
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.
Support: wolfSSL offers public support forums and a ticket system, and says submitting [email protected] creates a ticket.
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.

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