The best replacement for pixar is dreamworks.

The best alternatives to pixar are rated as following:
★★★★★  dreamworks
★★★★★  disney
★★★  disney movies
★★  dreamworks movies
★★  dreamworks animation
★  ghibli
★  studio ghibli
★  dreamworks better
★  blue sky
★  miyazaki
  disney animation
  dream work
  pixar

Your alternative for pixar is not listed? Suggest!
Speaking about pixar, one probably shouldn't forget about disney.

Other search terms related to pixar and their ratings are:
★★★★★ disney
steve jobs
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Google Trends

Scale is based on the average worldwide traffic of pixar in all years. Click on graph for more.
pixar
dreamworks
disney