The Apache Module report is a breakdown of the popular add-on modules to the Apache web servers. All percentages shown are based on web servers running Apache in this month's survey.

Click any module to see detailed graphs and histories.

Module	December 2021 Count	December 2021 %	November 2021 Count	November 2021 %	Growth %
OpenSSL	1,300,061	6.40	1,265,522	6.21	3.11
PHP	975,019	4.80	990,927	4.86	-1.24
mod_ssl	215,365	1.06	227,656	1.12	-5.05
mod_gzip	163,362	0.80	157,795	0.77	3.91
mod_bwlimited	133,106	0.66	139,755	0.69	-4.41
perl	99,441	0.49	103,315	0.51	-3.40
Perl	84,167	0.41	87,914	0.43	-3.91
DAV	79,074	0.39	84,131	0.41	-5.67
Python	68,590	0.34	73,613	0.36	-6.48
mod_python	41,132	0.20	42,296	0.21	-2.39
mod_jk	38,550	0.19	38,571	0.19	0.31
FrontPage	25,444	0.13	25,831	0.13	-1.14
mod_fastcgi	21,904	0.11	24,805	0.12	-11.37
SVN	18,597	0.09	19,238	0.09	-2.98
mod_auth_passthrough	10,252	0.05	13,446	0.07	-23.47
mod_throttle	6,001	0.03	6,059	0.03	-0.59
Ben-SSL	5,742	0.03	5,768	0.03	-0.08
mod_auth_pam	2,894	0.01	2,943	0.01	-1.30
rus	2,708	0.01	2,774	0.01	-2.02
JRun	2,233	0.01	2,264	0.01	-1.01
mod_log_bytes	2,145	0.01	2,158	0.01	-0.24
mod_layout	1,244	0.01	1,230	0.01	1.51
mod_ruby	1,111	0.01	1,129	0.01	-1.23
Sun-ONE-ASP	860	0.00	865	0.00	-0.21
mod_mono	836	0.00	835	0.00	0.49
Resin	803	0.00	819	0.00	-1.59
AuthMySQL	704	0.00	713	0.00	-0.90
mod_watch	552	0.00	555	0.00	-0.17
mod_tsunami	300	0.00	302	0.00	-0.30
Embperl	248	0.00	237	0.00	5.03
mod_jk2	246	0.00	250	0.00	-1.24
mod_macro	243	0.00	245	0.00	-0.45
mod_auth_pam_external	220	0.00	215	0.00	2.70
mod_ldap_userdir	220	0.00	229	0.00	-3.58
ApacheJServ	206	0.00	210	0.00	-1.54
mod_chroot	202	0.00	212	0.00	-4.37
iae_chroot	202	0.00	212	0.00	-4.37
gd	129	0.00	128	0.00	1.15
mod_accel	129	0.00	129	0.00	0.37
mod_become	97	0.00	98	0.00	-0.66
PHP-CGI	89	0.00	95	0.00	-5.97
mod_plsql	78	0.00	99	0.00	-20.92
mod_auth_sspi	62	0.00	73	0.00	-14.76
mod_filter	59	0.00	60	0.00	-1.30
mod_choke	55	0.00	55	0.00	0.37
mod_ucam_webauth	45	0.00	46	0.00	-1.81
Tomcat	44	0.00	44	0.00	0.37
mod_interchange	18	0.00	18	0.00	0.37
mod_webapp	17	0.00	18	0.00	-5.21
mod_accounting	13	0.00	13	0.00	0.37
Raven	8	0.00	8	0.00	0.37
SSLeay	7	0.00	7	0.00	0.37
CSacek	6	0.00	6	0.00	0.37
mod_czech	6	0.00	6	0.00	0.37
mod_oas	5	0.00	5	0.00	0.37
ihtml	3	0.00	3	0.00	0.37
Midgard	2	0.00	2	0.00	0.37
AuthPostgreSQL	1	0.00	1	0.00	0.37
AxKit	1	0.00	1	0.00	0.37
mod_mp3	1	0.00	1	0.00	0.37
mod_backhand	1	0.00	1	0.00	0.37

Note: Readers are cautioned that the Growth percentages are based on a module's market share penetration rather than the absolute number of modules we detected. Thus, it is possible for the number of modules to increase, while the growth is actually a negative value.

Looking for a specific module? Check the module registry at http://modules.apache.org

Note: OpenSSL, BSafe, and SSLeay aren't true modules in their own right; rather they are required for a number of SSL enabling modules, and will often have their signature string imbedded into the server string, thus allowing us to determine which of them is being used. Rather than separate this out into a separate report, we've included them here.