From Wikipedia, the free encyclopedia
Original author(s)Evan Prodromou et al.
Stable release
5.1.4[1][2] / 18 September 2020; 2 years ago (2020-09-18)
Written inJavaScript, Node.js
Operating systemCross-platform
TypeWeb application framework
LicenseApache License, Version 2.0[3]

Pump.io (pronounced "pump eye-oh") is a general-purpose activity streams engine that can be used as a federated social networking protocol which "does most of what people really want from a social network".[4][1] Started by Evan Prodromou, it is a follow-up to StatusNet;[5] Identi.ca, which was the largest StatusNet service, switched to pump.io in June 2013.[6]


Designed to be much more lightweight and efficient than its StatusNet predecessor,[5] Pump.io is written in Node.js and uses Activity Streams as the format for commands and to transfer data via a simple REST inbox API.[6]

Pump.io requires:

Pump.io can run easily on low-resource hardware (such as a Raspberry Pi or BeagleBone Black). It can be used via the Web UI, or other clients via the API.


As a distributed social network, Pump.io is not tied to a single site. Users across servers can subscribe to each other, and if one or more individual nodes go offline the rest of the network remains intact.

Limitations and issues[edit]

Features that were present in StatusNet are still (as of October 2017) not implemented in Pump.io, such as Groups,[7] hashtags,[8] and page listing popular posts.[9]


The W3C Federated Social Web Working Group, launched in July 2014,[10] has produced the ActivityPub standard, based on the protocols used in pump.io as a likely successor to OStatus.[11] It was officially published as a Recommendation on 23 January 2018.[12]

See also[edit]


  1. ^ a b "pump.io". pump.io.
  2. ^ "Releases · pump-io/pump.io". Github. Retrieved 2020-12-11.
  3. ^ "website". Retrieved 2014-03-22. Licensed under the Apache License, Version 2.0 (the "License")...
  4. ^ Prodromou, Evan. "E14N Post". Archived from the original on 22 March 2014. Retrieved 21 March 2014.
  5. ^ a b Behrenshausen, Bryan. "pump.io: the decentralized social network that's really fun". opensource.com. Retrieved 21 March 2014.
  6. ^ a b c Nathan Willis (March 27, 2013). "StatusNet, Identi.ca, and transitioning to pump.io". LWN.net. Retrieved 2014-03-20.
  7. ^ "Groups". Retrieved 2014-03-20.
  8. ^ "Automatically link hash tags". Retrieved 2014-03-20.
  9. ^ "Popular". Retrieved 2014-03-20.
  10. ^ Shankland, Stephen. "Social networking built into the Web? W3C gives it a go". CNET.
  11. ^ "Sandstorm And The Social Web". zenhack.net.
  12. ^ "ActivityPub". www.w3.org.

External links[edit]