id	Specification	AbsoluteTelnet	Apache SSHD	AsyncSSH	Bitvise SSH	ConnectBot	cryptlib	CycloneSSH	Dropbear	Erlang ssh library	FlowSsh	Georgia SoftWorks SSH	Go Cryptography	HPN-SSH	iTerminal	JSch	JuiceSSH	libassh	libssh	libssh2	lsh	Maverick Synergy	MindTerm	Mobile SSH	Mocca Telnet (iOS)	moussh	Net::SSH::Perl	Net::SSH	OpenSSH	OQS-OpenSSH	Paramiko	phpseclib	PKIX-SSH	Poderosa	Prompt 2	PuTTY	Reflection (Android)	Reflection (iOS)	RLogin	Russh	salt	SecureCRT	Serverauditor (Android)	Serverauditor (Chrome)	Serverauditor (iOS)	SilverSHielD	SmartFTP	SSH.NET	SSH2	SSHJ	SwiftNIO SSH	Tectia SSH	Thrussh	TinySSH	TinyTERM (Android)	TinyTERM (iOS)	Tera Term	Twisted Conch	vSSH (Android)	vSSH (iOS)	WebSSH	wolfSSH	Xshell 5		# of impls
none	RFC 4253	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	?	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes		61
zlib	RFC 4253	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes	No	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	Yes	Yes	Yes	Yes	No	Yes	No	?	No	No	Yes	Yes	No	Yes	Yes	No	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes		40
zlib@openssh.com	draft-miller-secsh-compression-delayed-00	Yes	Yes	Yes	No	Yes	No	No	Yes	Yes	No	No	No	Yes	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	No	No	Yes	Yes	Yes	Yes	No	Yes	No	?	Yes	Yes	Yes	Yes	No	No	Yes	No	No	No	Yes	No	No	No	Yes	No	No		34