Optimizely announced today that they raised $57 million in Series B funding led by Andreessen Horowitz with participation from Benchmark Capital and Bain Capital Ventures. Optimizely has experienced triple digit year-over-year growth in annual revenue since launching in 2010, and they are now the #1 most adopted website optimization platform with over 7,000 customers.

Congrats, Optimizely! 

Read more on the Optimizely blog