SSL Usage Distribution in the Top 1 Million Sites

Distribution for websites using SSL providers

Technology	Websites	%
SSL by Default	678,711	67.87
LetsEncrypt	382,104	38.21
Common Name Invalid	179,344	17.93
Cloudflare SSL	141,382	14.14
Comodo PositiveSSL	116,967	11.7
DigiCert SSL	108,742	10.87
Comodo SSL	102,777	10.28
Sectigo SSL	78,858	7.89
GoDaddy SSL	74,478	7.45
CPanel SSL	62,871	6.29
Amazon SSL	34,122	3.41
GlobalSign	29,281	2.93
RapidSSL	27,934	2.79
GeoTrust SSL	22,434	2.24
Starfield Technologies	20,819	2.08
Comodo PositiveSSL Wildcard	18,342	1.83
Invalid Certificate Dates	12,787	1.28
Thawte SSL	12,599	1.26
EssentialSSL	12,560	1.26