A blog is an informational website consisting of discrete, often informal diary-style text entries (posts). Posts are typically displayed in reverse chronological order so that the most recent post appears first, at the top of the web page. In the 2000s, blogs were often the work of a single individual, occasionally of a small group, and often covered a single subject or topic. In the 2010s, "multi-author blogs" (MABs) emerged, featuring the writing of multiple authors and sometimes professionally edited. MABs from newspapers, other media outlets, universities, think tanks, advocacy groups, and similar institutions account for an increasing quantity of blog traffic. The rise of Twitter and other "microblogging" systems helps integrate MABs and single-author blogs into the news media. Blog can also be used as a verb, meaning to maintain or add content to a blog.
An anonymous P2P communication system is a peer-to-peer distributed application in which the nodes, which are used to share resources, or participants are anonymous or pseudonymous. Anonymity of participants is usually achieved by special routing overlay networks that hide the physical location of each node from other participants.
BitlBee is a cross-platform IRC instant messaging gateway, licensed under the terms of the GNU General Public License.
Jaiku was a social networking, micro-blogging and lifestreaming service comparable to Twitter, founded a month before the latter. Jaiku was founded in February 2006 by Jyri Engeström and Petteri Koponen from Finland and launched in July of that year. It was purchased by Google on October 9, 2007.
Microblogging is a form of blogging using short posts without titles known as microposts. Microblogs "allow users to exchange small elements of content such as short sentences, individual images, or video links", which may be the major reason for their popularity. Some popular social networks such as X (Twitter), Threads, Tumblr, Mastodon and Instagram can be viewed as collections of microblogs.
identi.ca was a free and open-source social networking and blogging service based on the pump.io software, using the Activity Streams protocol. Identi.ca stopped accepting new registrations in 2013, but continues to operate alongside several other pump.io-based hosts provided by E14N which continue to accept new registrations.
GNU social is a free and open source microblogging server written in PHP that implemented the OStatus and ActivityPub standard for interoperability between installations. While offering functionality similar to Twitter, GNU social seeks to provide the potential for open and distributed communications between microblogging communities. Enterprises and individuals can install and control their own services and data.
Ping.fm was an advertising-supported social networking and micro-blogging web service that enabled users to post to multiple social networks simultaneously.
TwitPic was a website and app that allowed users to post pictures to the Twitter microblogging service, which at the time of TwitPic's creation could not be posted to Twitter directly. TwitPic was often used by citizen journalists to upload and distribute pictures in near real-time as an event was taking place.
Qaiku was a micro-blogging and lifestreaming service comparable to Twitter and Jaiku. It allowed users to post short text or picture messages that other users can then post comments on. In comparison to Twitter and Jaiku, Qaiku had a multilingual focus, with all messages marked and searchable based on their language. It was shut down on October 15, 2012.
The tables below compare general and technical information for some notable active microblogging services, and also social network services that have status updates.
Reblogging is the mechanism in blogging which allows users to repost the content of another user's post with an indication that the source of the post is another user.
OStatus is an open standard for decentralized social networking, allowing users on one service to send and receive status updates with users from another. The standard describes how a suite of various standards, including Atom, Activity Streams, WebSub, Salmon, and WebFinger, can be used together, which enables different microblogging server implementations to communicate status updates between their users back-and-forth, in near real-time.
Evan S. Prodromou is a software developer and open source advocate. He is a co-editor of ActivityPub, the W3C standard for decentralized social networking used by platforms such as Mastodon.
pump.io is a general-purpose activity stream engine that can be used as a federated social networking protocol which "does most of what people want from a social network". Started by Evan Prodromou, it is a follow-up to GNU Social, and is designed to be more lightweight and usable for general data instead of just microblogging. The largest StatusNet instance at the time, Identi.ca, which was the largest StatusNet service and was run by Prodromou, switched to pump.io in June 2013.
Mastodon is free and open-source software for running self-hosted social networking services. It has microblogging features similar to Twitter, which are offered by a large number of independently run nodes, known as instances or servers, each with its own code of conduct, terms of service, privacy policy, privacy options, and content moderation policies.
The fediverse is a collection of social networking services that can communicate with each other using a common protocol. Users of different websites can send and receive status updates, multimedia files and other data across the network. The term fediverse is a portmanteau of "federation" and "universe".
Micro.blog is a microblogging and social networking service created by Manton Reece. It is the first large multi-user social media service to support the Webmention and Micropub standards published by the World Wide Web Consortium, and is part of the Fediverse, supporting ActivityPub.
ActivityPub is a protocol and open standard for decentralized social networking. It provides a client-to-server API for creating and modifying content, as well as a federated server-to-server (S2S) protocol for delivering notifications and content to other servers. ActivityPub has become the main standard used in the fediverse, a popular network used for social networking that consists of software such as Mastodon, Pixelfed and PeerTube.
Pleroma is a free and open-source microblogging social networking service. Unlike popular microblogging services such as Twitter or Weibo, Pleroma can be self-hosted and operated by anyone with a server and a web domain, a combination commonly referred to as an instance. Instance administrators can manage their own code of conduct, terms of service, and content moderation policies, allowing users to have more control over the content they view as well as their experience.
