Stability AI

Stability AI is a London-based artificial intelligence company founded in 2019 by Emad Mostaque and Cyrus Hodes, best known for Stable Diffusion—the leading open-source text-to-image model. Headquartered at 88 Notting Hill Gate, London, the company employs 182-184 people across 6 continents (North America, Europe, Asia).

Stability AI raised $231 million total funding, including $101 million at a $1 billion valuation (October 2022) led by Coatue and Lightspeed Venture Partners, plus $80 million in June 2024 under new CEO Prem Akkaraju (former Weta Digital CEO). The company rose to prominence in August 2022 with the release of Stable Diffusion's source code and model weights as open-source, democratizing access to high-quality AI image generation.

Current products include Stable Diffusion 3.5, the latest iteration offering improved quality, speed, and customization. The open-source model approach enables unlimited customization, local deployment (running free on your hardware), and hundreds of community-trained variants spanning artistic styles, photorealism, anime, and specialized use cases.

Stability AI's impact extends beyond image generation into video, audio, and language models.