Software companies of the United Kingdom

Sinclair Research Ltd is a British consumer electronics company founded by Clive Sinclair in Cambridge in the 1970s. In 1980, the company entered the home computer market with the ZX80 at £99.95, at that time the cheapest personal computer for sale in the United Kingdom. A year later, the ZX81 became available through retailers, introducing home computing to a generation, with more that 1.5 million sold. In 1982 the ZX Spectrum was released, becoming the UK's best selling computer, and competing aggressively against Commodore and Amstrad.

Sefaira is a software company that specializes in green building design software. In 2011, Sefaira won the Green Building Innovation of the Year award at London’s Ecobuild. The company was founded in 2009.

VideoScribe is a drag-and-drop whiteboard animation software. It is known primarily for its hand-drawn animation style and has remained popular with its subscribers for enabling the creation of animated video content with few skills or prior knowledge required.

Romonet is a UK-based, privately held company, headquartered in London, UK, that provides cloud-based solutions and services to data centers and associated technology. Romonet solves energy, water, capacity and financial challenges in data centers. They claim Romonet makes the first software that accurately predicts total cost of ownership (TCO) and properly model energy flow. They began by creating a term called 'data center predictive modeling' (DCPM) that "rather than collecting real-time data, they predict data center configuration and architecture." Romonet Inc was launched in 2011 with the goal of bringing the product to the US market.

The Electronic Font Foundry (EFF) was a business engaged in the design and sale of computer fonts. It was established in 1984 by Polish physicist Dr Edward Detyna, in the United Kingdom. They tailored and produced fonts in PostScript, TrueType and formats. It produced fonts in more than 60 languages.

Beamly was a social platform based in London, UK and New York City, United States. The company was founded in April 2011 as tBone TV, later renamed to Zeebox, by Ernesto Schmitt and Anthony Rose. It was started as a social discovery and engagement platform with 2nd-screen TV, creating the concept of social television.

OpenBet is a provider of sportsbook technology, content and services, which is owned by Endeavor Group Holdings, Inc as of 2021.

Durell Software is a software developer based in Taunton, Somerset in the United Kingdom. The company is a provider of back office administration and accounting software to independent financial advisers, mortgage brokers, and general insurance brokers. Durell was formerly a successful video games developer.

ComplyAdvantage, founded in 2014, is a RegTech company that provides software to help detect and manage risks associated with AML and Fraud. The company uses artificial intelligence, machine learning and natural language processing to help regulated organisations manage risk obligations and counteract financial crime.

CloudBolt is a hybrid cloud management platform developed by CloudBolt Software for deploying and managing virtual machines (VMs), applications, and other IT resources, both in public clouds (e.g., AWS, MS Azure, GCP) and in private data centers (e.g., VMware, OpenStack).