Pixar Animation popped onto the scene in 1986, practically pioneering the way in focusing on computer generated animation as a whole storytelling tool. After almost ten years of creating experimental shorts, the company released the first ever fully computer animated feature-length film, Toy Story, and Pixar become an instant household name.
The Pixar name has also been synonymous with "great film" for a long time. Not everything they've put out has been perfect, but the hits certainly outweigh the misses. Pixar seems a to be able to bring new perspectives to their audiences, all while advancing the technology used in the process which keeps them leaders in the animation genre.