Immich vs PhotoPrism

Both Immich and PhotoPrism promise the same escape: your entire photo library on hardware you own, free from Google Photos and its quota emails. But they solve two different halves of the problem. Immich is built to be the phone-first backup destination you never think about, while PhotoPrism is built to make sense of a pile of photos you already have. The real question is not which is newer or which is written in which language — it is whether you are backing up a phone every day or curating a collection that mostly already exists.

Two different starting points

Immich starts at your phone. Its whole design assumes a mobile app running in the background, quietly uploading every new photo and video the moment you take it, then showing them back in a timeline that looks and feels like the app you are leaving behind. PhotoPrism starts at your storage. Point it at a folder of originals — a decade of camera dumps, a NAS share, an old Lightroom export — and it indexes, tags, and organizes what is already there. Neither is bad at the other's job, but each is unmistakably shaped by where it begins.

That difference shows up everywhere once you notice it. Immich's killer feature is automatic background backup from iOS and Android, with multi-user support so a whole household's phones land in one server. PhotoPrism's killer feature is that it treats your files as the source of truth and never demands you upload through an app at all.

Feature and experience comparison

• Mobile backup — Immich wins decisively. A polished, dedicated app with reliable background upload is the entire reason the project exists. PhotoPrism's mobile story is limited by comparison — it leans on a progressive web app rather than a first-class native uploader.
• Search and ML — a genuine strength on both. Immich offers smart search, face recognition, and object/scene detection; PhotoPrism has mature AI-powered tagging and labels that have been refined over years.
• Library organization — PhotoPrism's long suit. Albums, folders, private vaults, and quality filtering make it a strong tool for wrangling an existing, messy archive.
• Timeline and sharing — Immich's Google Photos-style timeline, shared albums, and partner sharing feel closest to the SaaS experience most people are replacing.
• Editing — neither is a full editor; both focus on organizing and viewing, not retouching.

Resources and performance

This is where the trade-off gets concrete. Immich is a TypeScript and Node.js application backed by PostgreSQL, and it leans on machine-learning models for faces and smart search. Those models are the reason its realistic floor is 4 GB of RAM — the storage itself is cheap, but the ML container is hungry, especially while it churns through the initial import of a large library. PhotoPrism is a compiled Go binary on MariaDB, and it does the same class of AI tagging in a lighter footprint, with a comfortable 2 GB minimum. On a small VPS that gap matters: PhotoPrism will happily coexist with other services on a modest box, while Immich wants that headroom mostly to itself.

Difficulty tracks the same story. Immich is rated 3 / 5 to self-host — several containers (server, machine-learning, Redis, Postgres) that move fast and change often. PhotoPrism sits at 2 / 5: fewer moving parts and a slower, steadier release rhythm. Both ship official Docker images, so neither is hard in absolute terms.

Measured idle at first boot backs up the direction, if not the exact scale, of those documented floors: a fresh, empty Immich instance settles at ~1.9 GB before you've imported a single photo, and PhotoPrism at ~102 MB — both well under their "realistic floor" numbers above, which assume an actual library and warmed ML models, but PhotoPrism's lighter-weight story holds at every measurement point.

Migrating from Google Photos

Both projects have a real, documented path off Google Photos via Google Takeout — the export tool Google provides for your own library. Immich's officially recommended route is immich-go, a community-maintained CLI tool linked from Immich's own docs; it reads the JSON sidecar files Takeout exports alongside your photos (capture date, GPS location, album membership) and imports them with that metadata attached, rather than falling back to file timestamps. PhotoPrism reads those same Google Takeout JSON sidecars natively when you point it at an extracted export folder — with a couple of documented rough edges: Takeout doesn't generate a sidecar for photos Google's editor modified, and the JSON only carries a raw UNIX timestamp with no timezone, so some dates need a manual check after import. Either path beats losing your photo metadata; budget an evening for a large library either way.

Momentum and maturity

The two projects have different temperaments. Immich develops at a blistering pace — new features land constantly, and the flip side is that you should read release notes and back up before major version bumps, exactly as the project itself advises. PhotoPrism is the calmer, more mature option: it changes slowly, breaks rarely, and rewards people who want to set it up once and mostly leave it alone. If you enjoy riding an improving product, Immich's speed is a feature; if you want boring reliability, PhotoPrism's steadiness is.

Which should you self-host?

Pick Immich if…

• A Google Photos-style experience with automatic phone backup is the whole point — you want photos off your device and onto your server without thinking.
• You are backing up multiple phones for a family or household and want a polished mobile app and shared timeline for everyone.
• You have the 4 GB of headroom to spare and don't mind a fast-moving project with frequent updates.

Pick PhotoPrism if…

• You are organizing an existing collection — a big archive of originals — more than continuously backing up a phone.
• You want the lighter footprint and the simpler, steadier deployment: a single Go binary that runs comfortably in 2 GB.
• You value a mature, slow-moving tool you can set up once and largely forget.

For most people arriving from Google Photos, Immich is the recommendation — it is the closest clone of the experience you are leaving, and its mobile backup is in a different league. PhotoPrism is the better pick only when phone sync is not the priority.

Who should pick neither

Both of these are gallery applications — a dedicated app with its own UI, search, and (for Immich) machine-learning pipeline sitting between you and your files. If you don't want an app at all — just your camera roll landing on your own server, in its original folder structure, with no server-side indexing — Syncthing does that directly. It's peer-to-peer file sync, not a gallery: your phone's photos folder syncs straight to a folder on your server, encrypted in transit, no timeline or ML tagging involved. That's the right answer for someone who wants a backup, not a Google Photos replacement.

Choosing between PhotoPrism and Immich

Flip the question and it comes down to the same one axis: are you continuously backing up phones, or organizing photos you already have? Pick PhotoPrism first if you're pointing it at an existing archive — a decade of camera dumps, a NAS share — and want the lighter, steadier tool (~102 MB measured idle, 2 GB documented floor). Pick Immich if automatic phone backup for a household is the actual job; its mobile app and shared timeline are worth the heavier machine (~1.9 GB measured idle, 4 GB documented floor) it asks for.

Running either on a VPS

Both run comfortably on a single small server, but plan around the RAM gap: give Immich real headroom — 4 GB and up — because its machine-learning worker is the heavy part, while PhotoPrism is content in 2 GB alongside a database. The step-by-step setups are linked below, and any of the VPS options here has plenty of room for the app plus its database. Whichever you choose, put your photo storage on a volume you back up independently, and give Immich a little extra breathing room the first time it indexes a large library.