Midjourney is an innovative text-to-image artificial intelligence (AI) service developed by a San Francisco-based independent research lab, Midjourney, Inc. The technology allows users to generate images based on textual prompts, producing a wide range of artworks that span from realistic to abstract styles. Launched into open beta in July 2022, the tool was designed by a team led by David Holz, co-founder of Leap Motion, and includes industry veterans such as Jim Keller, Nat Friedman, and Philip Rosedale.

Functioning through Discord, a popular chat platform, Midjourney is recognized for its user-friendly interface. To use the service, users simply input an "/imagine" command followed by a description of the desired image, and the AI generates a set of four images in response. Users can then select their preferred image to upscale. The AI is known for generating high-quality, well-structured, and detailed images, with resolutions up to 1,792 x 1,024 pixels. Despite concerns about copyright infringement from artists whose work was used in the training set, Midjourney's service is seen as a beneficial tool for rapid prototyping of artistic concepts and is rapidly being adopted by industries such as advertising.

Midjourney, like Stable Diffusion and DALL-E, is a generative model designed to create images from textual prompts. However, each of these models has unique characteristics that differentiate them from one another.