Women have been heavily instrumental in redefining the way we interact online. Here’s a look at the most influential of these.

(L to R: Leah Culver, Pownce; Rashmi Sinha, Slideshare; Dina Kaplin, blip.tv; Marissa Mayer, Google; Cyan Banister, Zivity; Lisa Stone, Jory Des Jardins, and Elisa Camahort Page, BlogHer; Caterina Fake, Flickr; Gina Bianchini, Ning; Kaliya Hamlin, OpenID; Mena Trott, Six Apart; and Arianna Huffington, The Huffington Post.)