Alternatives

	How it works	Uploads photos?
lrimmich	CLI tool. Reads the .lrcat database directly, matches files already mounted in Immich, writes metadata only.	No
immich-go	CLI tool. Bulk uploads from local folders, Google Photos takeouts, iCloud exports. Handles duplicates and stacking.	Yes
lrc-immich-plugin	LR Classic plugin. Export and publish service that uploads rendered photos via the Immich API. Can also import from Immich.	Yes
mi.Immich.Publisher	LR Classic plugin. Publishes collections as albums, deduplicates across collections.	Yes

The main difference: lrimmich never uploads photos. Your files need to already be in Immich via an external library mount. The other tools handle the upload step too, but don’t read Lightroom’s catalog database directly for metadata sync.