Immich vs PhotoPrism

Immich — strengths

• Best-in-class mobile apps with automatic background backup
• Fast, modern UI very close to Google Photos in feel
• CLIP-based semantic search ("red car at sunset") works out of the box
• Active release cadence with frequent feature drops and bug fixes
• Multi-user with shared albums, partner sharing, and per-user libraries

Immich — weaknesses

• Still pre-1.0; schema/API can change between releases
• GPU recommended for smooth ML on larger libraries
• Resource usage spikes during initial indexing can slow other containers on the same host

PhotoPrism — strengths

• Mature, stable project with years of production use
• Stronger metadata and EXIF tooling — easier to script bulk edits
• Good read-only "originals" model for archivists who want the index separate from the files
• Classification labels are transparent — you can inspect why an image was tagged a certain way
• Lighter idle footprint, friendlier to homelabs that pack many services on one box

PhotoPrism — weaknesses

• No native mobile apps; PWA-only limits auto-backup
• UI feels dated compared to Immich
• Some advanced features behind a membership tier even when self-hosted

When Immich fits

• Family of four, ~40k photos, three iPhones and an Android: Immich is the right pick because each phone gets the official app, background upload runs without intervention, and the partner-sharing feature lets two parents see each other's photos in a shared timeline. PhotoPrism's PWA cannot guarantee background upload on iOS, which makes it unreliable as a Google Photos replacement here.
• Photographer who wants a slick web UI to browse a working library and quickly find shots by content: Immich's CLIP search returns useful matches for natural-language queries, which beats scrolling by date when you don't remember when something was taken.

When PhotoPrism fits

• Long-time photographer with a 200k-image archive on a NAS, treated as immutable: PhotoPrism in read-only mode points at the originals directory and builds an index next to it without touching the files. If you ever delete the PhotoPrism container, the archive is untouched.
• Researcher or journalist who relies on accurate metadata: PhotoPrism's EXIF and IPTC handling is more thorough, and its bulk-edit tooling is better suited to fixing wrong dates or geotags across hundreds of files at once.

Immich gotchas

• Initial ML indexing is RAM- and CPU-heavy; allocate at least 4 GB and expect the first scan to take hours on a 50k-photo library
• Pre-1.0: minor releases occasionally include schema migrations that require a clean upgrade path — read release notes before bumping versions
• ARM (Raspberry Pi 4/5) works but ML features are noticeably slower; offload ML to an x86 box or an external GPU machine for large libraries
• Background upload on iOS is constrained by Apple's background-task budget; expect occasional manual nudges if you take hundreds of photos in a day

PhotoPrism gotchas

• PWA-only mobile means no reliable background upload on iOS — not a Google Photos replacement for camera-roll backup
• TensorFlow models add ~500 MB of disk and require x86 or ARM64 with sufficient RAM; older ARMv7 boards are out
• UI feels dated next to Immich, which can be a friction point for non-technical household members
• Membership-tier features (advanced search filters, places map) require a paid subscription even in self-host — read the licence carefully

Choose Immich when

Pick Immich if you are replacing Google Photos or iCloud Photos for your household and need reliable mobile auto-backup. It is also the better choice if you want CLIP-style semantic search and a UI your family will actually use.

Choose PhotoPrism when

Pick PhotoPrism if you have an existing archive you want to keep read-only, you care more about metadata accuracy than mobile UX, and you are running on lighter hardware where a smaller idle footprint matters.

Migration

Both tools support pointing at the same originals directory in read-only mode. The simplest migration path is to keep originals in a canonical folder, run both temporarily, and cut over once the new tool has finished indexing. Watched/favourite state does not transfer directly — there is a community immich-photoprism-migration script for face-tag and album mapping, but expect to verify a sample manually. Plan for at least a weekend of overlap so you can compare search results between the two before retiring the old container.

Frequently asked questions

Can I run Immich and PhotoPrism on the same server?

Yes. Run both as separate containers, point them at the same originals directory in read-only mode, and use different ports. They build independent indexes without conflicting. Watch disk I/O during initial scans.

How hard is migration between them?

Originals migrate trivially because both can point at the same folder. Albums, face names, and favourites do not transfer cleanly — expect to rebuild those manually or use community scripts. Run both side-by-side for a week before cutting over.

Which one handles RAW files better?

PhotoPrism has historically had stronger RAW + sidecar handling and better EXIF-driven workflows. Immich added RAW preview support in 2024 and is closing the gap, but for a serious RAW workflow PhotoPrism still has the edge.

Do I need a GPU?

Not strictly. Both run CPU-only. A GPU makes initial indexing and face recognition significantly faster on large libraries (50k+ photos). Immich's NVIDIA / RKNN / OpenVINO backends are well-documented; PhotoPrism's TensorFlow benefits from a GPU but it is not as configurable.

Which has better mobile backup?

Immich, by a wide margin. It ships official iOS and Android apps with background upload, which PhotoPrism does not. If mobile backup is the primary use case, Immich is the only practical pick.

Is Immich production-ready?

It is widely used in production but still pre-1.0. Back up your database and originals before upgrading between minor versions, and read the release notes for breaking changes.

Can I self-host behind HTTPS?

Yes, both work fine behind a reverse proxy (Caddy, Traefik, Nginx Proxy Manager) with Let's Encrypt certificates. Immich's mobile app needs a valid HTTPS endpoint or a self-signed cert manually trusted on the device.