Animation studios cover everything from 2D motion graphics through to character animation and 3D product walkthroughs. The skill set rarely overlaps with live-action videography, which is why this category sits as a separate listing.
If you are commissioning an explainer, send the script first if you have one. If you do not have a script yet, the studio will usually want to start with a discovery call before quoting. Animation work usually involves longer pre-production than live action and shorter pickups once the style is locked.