Is Apache-2.0 compatible with BSL-1.0?
Yes.
Combine freely; retain all notices. Result can be relicensed (kept proprietary) downstream. Result license is the more restrictive of the inputs. You must satisfy every input license's notice and source-offer terms. Verify pairwise compatibility first.
Resulting work's license: Apache-2.0
General guidance, not legal advice.
Obligations when redistributing as open source
- Apache-2.0: retain the copyright notice and license text.
- Apache-2.0: state significant changes made to the code.
- Apache-2.0: include the NOTICE file with attribution notices.
- BSL-1.0: retain the copyright notice and license text in source distributions (not required for binary-only).
Other distribution models
The verdict is the same under every distribution model; the obligations differ. Check this pair in the tool to switch models.