Stack Overflow

professional and enthusiast programmers
User
8.781.231
Votes
119.061.124
Comments
79.478.122
Questions
15.790.551
Answers
24.475.571
Solved Questions
8.417.752
Unsolved Questions
4.562.182
Server Fault
system and network administrators
User
363.747
Votes
1.781.248
Comments
1.071.377
Questions
260.009
Answers
430.853
Solved Questions
128.550
Unsolved Questions
57.023
Super User
computer enthusiasts and power users
User
635.640
Votes
2.963.444
Comments
1.747.544
Questions
376.258
Answers
557.638
Solved Questions
159.253
Unsolved Questions
121.488

Meta Stack Exchange

meta-discussion of the Stack Exchange family of Q&A websites
User
202.943
Votes
2.355.186
Comments
846.229
Questions
86.210
Answers
127.163
Solved Questions
41.262
Unsolved Questions
10.895
Web Applications
power users of web applications
User
116.521
Votes
255.975
Comments
81.387
Questions
24.210
Answers
34.855
Solved Questions
9.336
Unsolved Questions
4.014

Arqade

passionate videogamers on all platforms
User
121.702
Votes
1.194.328
Comments
404.021
Questions
82.504
Answers
137.647
Solved Questions
51.570
Unsolved Questions
5.862
Webmasters
pro webmasters
User
66.617
Votes
187.592
Comments
120.135
Questions
29.581
Answers
46.653
Solved Questions
13.078
Unsolved Questions
1.738

Seasoned Advice

professional and amateur chefs
User
43.406
Votes
301.437
Comments
114.819
Questions
19.147
Answers
47.042
Solved Questions
9.839
Unsolved Questions
570

Game Development

professional and independent game developers
User
88.430
Votes
397.322
Comments
236.499
Questions
42.422
Answers
65.814
Solved Questions
22.892
Unsolved Questions
5.874
Photography
professional, enthusiast and amateur photographers
User
48.525
Votes
321.972
Comments
145.372
Questions
21.073
Answers
51.848
Solved Questions
11.089
Unsolved Questions
630

Cross Validated

people interested in statistics, machine learning, data analysis, data mining, and data visualization
User
163.245
Votes
780.805
Comments
566.165
Questions
124.880
Answers
119.109
Solved Questions
39.031
Unsolved Questions
49.143

Mathematics

people studying math at any level and professionals in related fields
User
440.255
Votes
5.857.438
Comments
4.948.855
Questions
947.784
Answers
1.331.893
Solved Questions
500.015
Unsolved Questions
212.909
Home Improvement
contractors and serious DIYers
User
56.020
Votes
244.615
Comments
193.363
Questions
37.582
Answers
63.830
Solved Questions
13.774
Unsolved Questions
5.541

Geographic Information Systems

cartographers, geographers and GIS professionals
User
88.192
Votes
574.908
Comments
384.381
Questions
97.402
Answers
114.496
Solved Questions
38.290
Unsolved Questions
19.307

TeX - LaTeX

users of TeX, LaTeX, ConTeXt, and related typesetting systems
User
130.767
Votes
1.910.053
Comments
923.982
Questions
156.325
Answers
204.255
Solved Questions
95.258
Unsolved Questions
11.153

Ask Ubuntu

Ubuntu users and developers
User
571.909
Votes
2.412.801
Comments
1.424.523
Questions
292.092
Answers
377.065
Solved Questions
99.370
Unsolved Questions
96.403

Personal Finance & Money

people who want to be financially literate
User
48.490
Votes
341.517
Comments
139.920
Questions
21.895
Answers
42.077
Solved Questions
10.274
Unsolved Questions
1.466
English Language & Usage
linguists, etymologists, and serious English language enthusiasts
User
209.713
Votes
1.472.815
Comments
895.455
Questions
96.311
Answers
224.232
Solved Questions
47.687
Unsolved Questions
6.537

Stack Apps

apps, scripts, and development with the Stack Exchange API
User
34.869
Votes
25.356
Comments
12.312
Questions
2.376
Answers
2.376
Solved Questions
884
Unsolved Questions
894
User Experience
user experience researchers and experts
User
87.142
Votes
441.725
Comments
162.793
Questions
25.903
Answers
69.166
Solved Questions
13.022
Unsolved Questions
822
Unix & Linux
users of Linux, FreeBSD and other Un*x-like operating systems
User
255.335
Votes
1.406.050
Comments
682.933
Questions
140.280
Answers
210.419
Solved Questions
67.930
Unsolved Questions
33.023
WordPress Development
WordPress developers and administrators
User
107.827
Votes
351.248
Comments
390.983
Questions
87.060
Answers
110.071
Solved Questions
41.898
Unsolved Questions
24.626

Theoretical Computer Science

theoretical computer scientists and researchers in related fields
User
33.078
Votes
210.090
Comments
75.764
Questions
9.459
Answers
13.750
Solved Questions
4.393
Unsolved Questions
2.332
Ask Different
power users of Apple hardware and software
User
202.517
Votes
704.816
Comments
354.973
Questions
90.099
Answers
135.888
Solved Questions
34.668
Unsolved Questions
23.724

Role-playing Games

gamemasters and players of tabletop, paper-and-pencil role-playing games
User
31.138
Votes
821.343
Comments
167.828
Questions
27.475
Answers
66.025
Solved Questions
18.822
Unsolved Questions
87
Bicycles
people who build and repair bicycles, people who train cycling, or commute on bicycles
User
26.139
Votes
176.721
Comments
97.758
Questions
11.461
Answers
28.280
Solved Questions
5.999
Unsolved Questions
330

Software Engineering

professionals, academics, and students working within the systems development life cycle
User
252.274
Votes
2.024.636
Comments
716.641
Questions
49.314
Answers
147.884
Solved Questions
28.871
Unsolved Questions
2.791
Electrical Engineering
electronics and electrical engineering professionals, students, and enthusiasts
User
132.804
Votes
837.640
Comments
818.521
Questions
100.580
Answers
177.011
Solved Questions
50.871
Unsolved Questions
10.858
Android Enthusiasts
enthusiasts and power users of the Android operating system
User
165.692
Votes
297.180
Comments
211.720
Questions
47.762
Answers
58.191
Solved Questions
13.764
Unsolved Questions
20.067

Physics

active researchers, academics and students of physics
User
134.917
Votes
1.058.719
Comments
757.207
Questions
118.532
Answers
172.466
Solved Questions
50.391
Unsolved Questions
24.619

Information Security

information security professionals
User
138.247
Votes
795.659
Comments
301.207
Questions
46.448
Answers
85.749
Solved Questions
22.156
Unsolved Questions
3.769
Graphic Design
Graphic Design professionals, students, and enthusiasts
User
82.763
Votes
250.205
Comments
127.008
Questions
24.595
Answers
44.687
Solved Questions
11.165
Unsolved Questions
2.074
Database Administrators
database professionals who wish to improve their database skills and learn from others in the community
User
122.810
Votes
464.126
Comments
289.830
Questions
65.426
Answers
87.941
Solved Questions
31.453
Unsolved Questions
12.487
Science Fiction & Fantasy
science fiction and fantasy enthusiasts
User
73.239
Votes
1.510.471
Comments
424.931
Questions
47.917
Answers
92.049
Solved Questions
28.173
Unsolved Questions
3.379

Code Review

peer programmer code reviews
User
144.872
Votes
609.499
Comments
292.986
Questions
52.963
Answers
84.408
Solved Questions
30.660
Unsolved Questions
5.293

Programming Puzzles & Code Golf

programming puzzle enthusiasts and code golfers
User
61.674
Votes
752.444
Comments
294.653
Questions
9.615
Answers
120.712
Solved Questions
5.035
Unsolved Questions
86

Quantitative Finance

finance professionals and academics
User
21.822
Votes
79.484
Comments
45.292
Questions
10.827
Answers
14.230
Solved Questions
4.175
Unsolved Questions
2.604
Skeptics
scientific skepticism
User
30.760
Votes
346.100
Comments
126.874
Questions
8.515
Answers
10.660
Solved Questions
4.201
Unsolved Questions
1.111
Drupal Answers
Drupal developers and administrators
User
52.280
Votes
402.136
Comments
265.985
Questions
76.578
Answers
98.873
Solved Questions
34.869
Unsolved Questions
23.166

Motor Vehicle Maintenance & Repair

mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
User
26.243
Votes
143.958
Comments
78.326
Questions
16.025
Answers
25.400
Solved Questions
6.122
Unsolved Questions
2.345
SharePoint
SharePoint enthusiasts
User
49.545
Votes
249.607
Comments
224.413
Questions
80.355
Answers
103.196
Solved Questions
31.699
Unsolved Questions
26.759
Music: Practice & Theory
musicians, students, and enthusiasts
User
33.350
Votes
205.199
Comments
89.269
Questions
13.219
Answers
35.164
Solved Questions
6.824
Unsolved Questions
331
Mi Yodeya
those who base their lives on Jewish law and tradition and anyone interested in learning more
User
9.762
Votes
294.674
Comments
214.600
Questions
25.301
Answers
40.301
Solved Questions
8.695
Unsolved Questions
3.787

Japanese Language

students, teachers, and linguists wanting to discuss the finer points of the Japanese language
User
17.571
Votes
189.354
Comments
71.972
Questions
15.765
Answers
24.883
Solved Questions
11.185
Unsolved Questions
160

Philosophy

those interested in the study of the fundamental nature of knowledge, reality, and existence
User
24.797
Votes
119.740
Comments
107.320
Questions
10.268
Answers
24.558
Solved Questions
3.911
Unsolved Questions
936

Travel

road warriors and seasoned travelers
User
54.061
Votes
586.677
Comments
217.919
Questions
29.567
Answers
48.794
Solved Questions
12.822
Unsolved Questions
416
Cryptography
software developers, mathematicians and others interested in cryptography
User
43.681
Votes
156.310
Comments
95.933
Questions
16.102
Answers
20.794
Solved Questions
8.134
Unsolved Questions
2.090

Signal Processing

practitioners of the art and science of signal, image and video processing
User
0
Votes
0
Comments
0
Questions
0
Answers
0
Solved Questions
0
Unsolved Questions
0
Christianity
committed Christians, experts in Christianity and those interested in learning more
User
20.883
Votes
220.405
Comments
123.797
Questions
10.097
Answers
23.575
Solved Questions
5.190
Unsolved Questions
263

Bitcoin

Bitcoin crypto-currency enthusiasts
User
58.036
Votes
143.383
Comments
67.831
Questions
20.537
Answers
27.571
Solved Questions
8.022
Unsolved Questions
3.822

Movies & TV

movie and tv enthusiasts
User
43.379
Votes
417.085
Comments
111.494
Questions
15.512
Answers
25.831
Solved Questions
9.483
Unsolved Questions
1.289

Biology

biology researchers, academics, and students
User
30.078
Votes
189.755
Comments
103.385
Questions
19.641
Answers
22.703
Solved Questions
8.815
Unsolved Questions
3.818

Mathematica

users of Wolfram Mathematica
User
38.914
Votes
656.195
Comments
373.756
Questions
51.876
Answers
75.844
Solved Questions
27.884
Unsolved Questions
6.033

Academia

academics and those enrolled in higher education
User
70.394
Votes
796.487
Comments
231.638
Questions
23.488
Answers
54.532
Solved Questions
10.347
Unsolved Questions
815

Computer Science

students, researchers and practitioners of computer science
User
70.603
Votes
215.470
Comments
148.716
Questions
25.248
Answers
30.200
Solved Questions
11.635
Unsolved Questions
4.764

The Workplace

members of the workforce navigating the professional setting
User
61.258
Votes
918.724
Comments
241.173
Questions
18.626
Answers
59.215
Solved Questions
9.189
Unsolved Questions
16
Chemistry
scientists, academics, teachers and students
User
41.391
Votes
274.991
Comments
134.826
Questions
26.374
Answers
30.843
Solved Questions
10.777
Unsolved Questions
4.768

Raspberry Pi

users and developers of hardware and software for Raspberry Pi
User
69.260
Votes
130.919
Comments
109.248
Questions
22.706
Answers
29.841
Solved Questions
8.110
Unsolved Questions
6.579

Salesforce

Salesforce administrators, implementation experts, developers and anybody in-between
User
38.997
Votes
335.209
Comments
283.213
Questions
76.012
Answers
89.726
Solved Questions
33.650
Unsolved Questions
21.542
ExpressionEngine® Answers
administrators, end users, developers and designers for ExpressionEngine® CMS
User
5.573
Votes
38.451
Comments
33.338
Questions
12.084
Answers
15.448
Solved Questions
5.767
Unsolved Questions
2.584

Anime & Manga

anime and manga fans
User
21.472
Votes
135.740
Comments
47.452
Questions
9.204
Answers
13.661
Solved Questions
5.033
Unsolved Questions
1.126

Magento

users of the Magento e-Commerce platform
User
47.913
Votes
269.765
Comments
270.786
Questions
74.066
Answers
87.064
Solved Questions
27.977
Unsolved Questions
26.238
English Language Learners
speakers of other languages learning English
User
56.946
Votes
381.503
Comments
264.811
Questions
50.166
Answers
81.949
Solved Questions
25.402
Unsolved Questions
4.238

Network Engineering

network engineers
User
35.060
Votes
70.042
Comments
72.113
Questions
10.600
Answers
16.379
Solved Questions
5.837
Unsolved Questions
1.047

Blender

people who use Blender to create 3D graphics, animations, or games
User
41.124
Votes
213.733
Comments
155.701
Questions
39.684
Answers
38.978
Solved Questions
16.218
Unsolved Questions
11.215
MathOverflow
professional mathematicians
User
80.025
Votes
1.591.684
Comments
616.586
Questions
92.057
Answers
132.105
Solved Questions
42.793
Unsolved Questions
23.042
Stack Overflow em Português
programadores profissionais e entusiastas
User
85.057
Votes
560.344
Comments
507.518
Questions
102.540
Answers
123.834
Solved Questions
52.884
Unsolved Questions
26.626

Aviation

aircraft pilots, mechanics, and enthusiasts
User
23.614
Votes
298.758
Comments
98.066
Questions
12.031
Answers
23.159
Solved Questions
6.922
Unsolved Questions
457
Software Recommendations
people seeking specific software recommendations
User
30.896
Votes
79.516
Comments
49.828
Questions
14.892
Answers
14.741
Solved Questions
3.235
Unsolved Questions
6.863

Arduino

developers of open-source hardware and software that is compatible with Arduino
User
34.641
Votes
65.737
Comments
89.324
Questions
14.673
Answers
20.600
Solved Questions
6.132
Unsolved Questions
2.750

Data Science

Data science professionals, Machine Learning specialists, and those interested in learning more about the field
User
40.415
Votes
54.492
Comments
28.838
Questions
9.645
Answers
11.273
Solved Questions
3.274
Unsolved Questions
3.054

Puzzling

those who create, solve, and study puzzles
User
36.532
Votes
401.812
Comments
158.609
Questions
12.483
Answers
34.304
Solved Questions
10.401
Unsolved Questions
82

Worldbuilding

writers/artists using science, geography and culture to construct imaginary worlds and settings
User
41.404
Votes
638.758
Comments
292.326
Questions
16.179
Answers
77.876
Solved Questions
8.814
Unsolved Questions
8

Emacs

those using, extending or developing Emacs
User
13.731
Votes
91.685
Comments
51.690
Questions
13.559
Answers
15.751
Solved Questions
7.129
Unsolved Questions
3.169

Stack Overflow на русском

программистов
User
117.552
Votes
783.508
Comments
1.037.398
Questions
209.666
Answers
247.283
Solved Questions
102.835
Unsolved Questions
52.947
Law
legal professionals, students, and others with experience or interest in law
User
13.152
Votes
57.224
Comments
41.601
Questions
9.164
Answers
11.384
Solved Questions
3.444
Unsolved Questions
1.574

Stack Overflow en español

programadores y profesionales de la informática
User
75.834
Votes
179.389
Comments
265.199
Questions
54.987
Answers
65.894
Solved Questions
24.411
Unsolved Questions
19.021
Ethereum
users of Ethereum, the decentralized application platform and smart contract enabled blockchain
User
34.842
Votes
92.986
Comments
49.032
Questions
18.260
Answers
19.607
Solved Questions
7.053
Unsolved Questions
5.612