Yes — but the combined work must be released under the more restrictive license.
ISC License code can be combined with GNU Affero GPL v3.0 code without conflict. The combined work, when distributed, must be licensed under GNU Affero GPL v3.0. The original ISC License files keep their notice, but the project as a whole is governed by the stronger copyleft.
| License | Family | Patent grant |
|---|---|---|
| ISC License (ISC) | permissive | No (implicit at most) |
| GNU Affero GPL v3.0 (AGPL-3.0) | network-copyleft | Yes |
ISC License: Functionally equivalent to MIT; Internet Systems Consortium's house license.
GNU Affero GPL v3.0: GPLv3 plus § 13: providing software over a network triggers the source-disclosure obligation.
If you found this page because you're trying to figure out whether shipping a particular dependency is safe, the answer above is a starting point — not a substitute for reading the actual licenses or talking to a lawyer when stakes are high.
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