You can watch IO talks from Android, Chrome, Flutter where the presenter eventually throws some jabs at other competing stacks as if they aren't from the same employer.

Where I work, departments bill each other. Sometimes, two departments develop competing tools that are third department could make use of. Instead the third department use an off the shelf tool because the "license" for the internal tools is too expensive.

At these scales, companies are almost like states. A group of entities with shared services but otherwise working independently.