Is ISC compatible with MIT?
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: ISC
General guidance, not legal advice.
Obligations when redistributing as open source
- ISC: retain the copyright notice and license text.
- MIT: retain the copyright notice and license text.
Other distribution models
The verdict is the same under every distribution model; the obligations differ.
Check this pair in the tool to switch models.