PhotoPrism vs Immich: Which Self-Hosted Photo Manager Should You Run?

PhotoPrism vs Immich: Which Self-Hosted Photo Manager Should You Run?

If you’re looking to break free from Google Photos, you’ve likely narrowed it down to two names: PhotoPrism and Immich. These are the dominant self-hosted photo management apps in the homelab space, but they take fundamentally different approaches. Immich aims to be a near-drop-in replacement for Google Photos with robust mobile backup and AI tagging. PhotoPrism focuses on indexing and organizing an existing photo library, with a lighter server footprint. This guide compares them head-to-head on mobile backup, AI features, resource usage, and setup complexity — so you can pick the right one for your NAS or homelab server.

Mobile Backup: Immich vs PhotoPrism — The Decisive Feature

For most homelab users, the primary reason to self-host photos is to automatically back up their phone. This is where the two apps diverge most sharply.

Immich offers official iOS and Android apps that support background upload, selective album sync, and automatic backup of new photos and videos. The apps are mature, regularly updated, and feel nearly identical to the Google Photos mobile experience. You can set it to upload only on Wi-Fi, only while charging, or both. This is the closest you’ll get to a “set it and forget it” mobile backup solution in the open-source world.

PhotoPrism does not have a native mobile app. It relies on a Progressive Web App (PWA) — essentially a bookmark to the web interface that can be added to your home screen. While the PWA works well for browsing and viewing photos, it cannot perform background uploads on iOS or Android. To back up photos to PhotoPrism, you must either use a third-party sync tool (like Syncthing or FolderSync) or manually upload via the web interface.

AI Features: Which Has Better Face Recognition and Object Detection?

Both apps offer machine learning-powered features, but their maturity and approach differ.

Immich’s Stronger Built-in AI

Immich ships with a dedicated machine learning service (usually a separate Docker container) that handles face detection, object classification, and scene tagging out of the box. Its face recognition is particularly strong — it groups faces accurately, lets you name them, and searches by person reliably. Object detection can identify common items (cars, animals, food) and scenes (beach, city, landscape). These features work with minimal configuration; you just enable them in settings and let the ML container index your library.

PhotoPrism’s Newer Local-LLM Approach

PhotoPrism has traditionally lagged behind in AI features. Its face recognition is basic and often requires manual grouping. However, a newer feature allows you to connect PhotoPrism to a local LLM (like Ollama) for automatic captioning and description generation. This can produce rich, natural-language descriptions of your photos — something Immich doesn’t natively do. For example, a photo of a dog on a beach might get tagged as “A golden retriever playing on a sandy beach with waves in the background.” This is powerful for search, but it requires running an additional LLM container, which is resource-intensive and still experimental.

Resource Usage: PhotoPrism vs Immich — Which Is Lighter on Your NAS?

If your homelab hardware is modest — say an Intel N100 or an older mini PC — resource usage matters. Here’s how they compare.

PhotoPrism is noticeably lighter. Its core stack is just the app and a MariaDB or SQLite database. It generates thumbnails on the fly and caches them, but the overall resource footprint is smaller. This makes it a good fit for low-power hardware like a Intel N100 vs N305 for a NAS: Is the Upgrade Worth It? — you can run it comfortably alongside other services.

Immich is heavier because it runs multiple microservices: a main server, a background worker for transcoding, a machine learning container, a Redis cache, and a PostgreSQL database. Each container consumes some overhead. On a system with 8GB of RAM, you’ll have little room for other workloads. If you’re building a dedicated photo server, this is fine. But if you’re running a multi-purpose NAS, the resource drain is noticeable.

Use Case Fit: Immich for Daily Mobile Backup vs PhotoPrism for Static Archives

The right choice depends entirely on how you intend to use the app.

Choose Immich if you want to replace Google Photos

• You take photos daily on your phone and want automatic, reliable backup.
• You want face recognition and object search that works well without tweaking.
• You’re okay dedicating ~6-8GB of RAM and multiple containers to the service.
• Your homelab has at least 16GB of RAM or you’re running it on a dedicated machine.

Choose PhotoPrism if you want to index an existing photo archive

• You have a large collection of photos (10,000+) already stored on your NAS from cameras, old phones, or external drives.
• You want a clean, fast web interface to browse, search, and share those photos.
• Mobile backup is handled separately (via Syncthing, Nextcloud, or manual uploads).
• You’re running on lower-power hardware and want to minimize resource usage.

Setup Complexity: Which Is Easier for Beginners?

Both apps can be deployed via Docker, but their setup complexity differs.

PhotoPrism is simpler. A basic docker-compose.yml with two services (app and database) gets you running in minutes. Configuration is done via environment variables, and the web UI is straightforward. There’s no need to manage multiple microservices or understand Redis/PostgreSQL internals. If you’re new to self-hosting, PhotoPrism is the easier entry point.

Immich requires more upfront work. You need to set up PostgreSQL, Redis, and the ML container — the official docker-compose.yml has 7+ services. The documentation is good, but troubleshooting issues (like database migrations or ML container failures) can be daunting for beginners. Immich also updates frequently, which means you’ll need to stay on top of version upgrades to avoid compatibility issues.

Bottom Line: Which Self-Hosted Photo App Should You Choose?

Pick Immich if your priority is automatic mobile backup with strong AI features, and you have a server with at least 16GB of RAM. It’s the closest you’ll get to a Google Photos replacement that you fully control.

Pick PhotoPrism if you have an existing photo library to organize, want a lighter resource footprint, and can handle mobile backup through other tools. It’s the better choice for low-power NAS builds and static archives.

If you’re still unsure, start with PhotoPrism — it’s simpler to set up and less resource-intensive. You can always migrate to Immich later if you find the mobile backup gap unacceptable. Either way, ensure you have enough storage planned. Use our How Much Storage Do You Need for a NAS? A Practical Sizing Guide to estimate your photo library’s growth.