identi.ca is a free and open-source social networking and blogging service based on the pump.io software, using the Activity Streams protocol.

[1] Identi.ca is similar to social networking sites like Facebook and Google+, allowing unlimited length status updates, rich text, and images.

The service received more than 8,000 registrations and 19,000 updates within the first 24 hours of publicly launching on July 2, 2008,[2] and reached its 1,000,000th notice on November 4, 2008.

In addition, Identi.ca/StatusNet allowed free export and exchange of personal and "friend" data based on the FOAF standard; therefore, notices could be fed into a Twitter account or other service, and also ported in to a private system similar to Yammer.

[7][8] Registration on Identi.ca was closed in December 2012 in preparation for the switch to pump.io software (the popularity of Identi.ca and "official" Status.net hosting were considered a hindrance to the creation of a federated social network).