Scala vs Swift
Swift shows up at 5 of the 255 companies we track, Scala at 4. None have both.
Counts come from DNS, response headers, page source and public job posts; a tool named in a single job post is not counted. They show adoption among companies developers look up, not market share. There is no signed verdict for this pair yet.
Scala
4
companies (2% of those tracked)
Only Scala
4 companies
Usually paired with
Stripe (4), React (3), Kubernetes (3)