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Is GNU Affero GPL v3.0 compatible with GNU Lesser GPL v3.0?

No

GNU Affero GPL v3.0 is strong copyleft; combining it into a GNU Lesser GPL v3.0 project would force the combined work to be GNU Affero GPL v3.0 (not GNU Lesser GPL v3.0). If your project must remain GNU Lesser GPL v3.0, avoid GNU Affero GPL v3.0 code.

About these licenses

LicenseFamilyPatent grant
GNU Affero GPL v3.0 (AGPL-3.0) network-copyleft Yes
GNU Lesser GPL v3.0 (LGPL-3.0) weak-copyleft Yes

GNU Affero GPL v3.0: GPLv3 plus § 13: providing software over a network triggers the source-disclosure obligation.

GNU Lesser GPL v3.0: Same library-linking permission as LGPL-2.1, with GPLv3's patent provisions inherited.

What to do next

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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