Category - Comment Systems

Question2Answer (Q2A) is a popular open source Q&A platform for PHP/MySQL.

We have discovered 637 live websites that are using Question2Answer.

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Technology usage statistics

Websites using Question2Answer 637 websites
Most popular in the country United States of America
Market position in Comment Systems #5
Market share in Comment Systems 0.62%
Most popular version 1

Technology adoption

Recent changes in Question2Answer usage. (See Question2Answer Usage Changes report)
Websites that added Question2Answer +15
Websites that dropped Question2Answer -34
Websites that changed version of Question2Answer 2

Distribution by websites popularity

Question2Answer detection in the top websites by popularity
Top 10k sites 0 websites
Top 100k sites 5 websites
Top 1m sites 20 websites

Websites utilizing Question2Answer

Top websites that use Question2Answer

Domain Country Rank Contacts Netherlands 16,422 United States of America 28,180 Germany 62,494 France 67,102 United States of America 72,029 United States of America 266,346
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Flat price per the report, subscription is not required.

Market Share

Question2Answer market share within the Comment Systems category

Geographical Distribution

Technology usage distribution by websites across the globe.


  • 1 (14 subversions, 159 domains)
  • 11 (1 subversions, 1 domains)

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