Cortana was a virtual assistant developed by Microsoft, first introduced in 2014 as part of the Windows Phone 8.1 operating system. Named after the artificial intelligence character from the Halo video game franchise, Cortana was designed to compete with other digital assistants such as Apple's Siri and Google's Google Assistant. It offered voice-activated commands, natural language processing, and proactive assistance, including reminders, calendar management, and web search integration. Over time, Cortana was integrated into various Microsoft products, including Windows 10, Windows 11, Microsoft Edge, and the Microsoft 365 suite, but it struggled to gain significant market share compared to its rivals. Microsoft officially discontinued the standalone Cortana mobile app in 2020 and ended support for the assistant in Windows in 2023, shifting focus to AI-powered productivity tools within Microsoft 365.
Development and release
Cortana's development began under the codename "Gadget" within Microsoft's Bing team, led by David Luan and other engineers. The assistant was unveiled at the Build developer conference in April 2014 and launched with Windows Phone 8.1 in the same year. Cortana was initially available only in the United States, with international rollouts following in subsequent months. The assistant's name and voice were inspired by the fictional AI character from the Halo series, with voice actress Jen Taylor providing the character's voice in both the games and the assistant. Cortana's early features included the ability to set reminders, track flights, and answer trivia questions using Bing's search engine.
Integration and expansion
With the release of Windows 10 in July 2015, Cortana was integrated into the desktop operating system, allowing users to search files, launch applications, and control system settings via voice or text input. Microsoft also released Cortana apps for iOS and Android in 2015 and 2016, respectively, enabling cross-platform synchronization of reminders and notifications. In 2017, Cortana was integrated into Microsoft's Azure cloud platform and the Microsoft 365 suite, where it could assist with email management, meeting scheduling, and calendar organization. Despite these efforts, Cortana's market share remained low, partly due to privacy concerns and the dominance of competing assistants.
Discontinuation and legacy
In January 2020, Microsoft announced the end of the Cortana mobile app in most markets, and in 2021, the assistant was removed from the Windows 11 initial release, though a standalone app remained available. Microsoft officially discontinued Cortana in Windows in late 2023, redirecting users to the new AI-powered Bing Chat and other generative AI tools. Cortana's underlying technology, including its speech recognition and natural language understanding, influenced later Microsoft products such as Azure AI services and the Copilot assistant. The assistant is often cited as an example of a well-engineered product that failed to achieve widespread adoption due to platform fragmentation and market competition.
See also
- Virtual assistant
- Microsoft
- Windows
- Bing
- Artificial intelligence