Nextcloud's appeal and its burden are the same thing: one login covering files, calendars, contacts, chat, and office editing. Most people adopt it for a single job and then inherit the work of operating an entire platform - the PHP stack, the database, background jobs, previews, and app compatibility - just to keep that one job running. The open source way out is usually to stop looking for another all-in-one and instead match a focused tool to the workload you actually use. Narrowing the scope means a system that is easier to back up, monitor, and reason about, still self-hosted on hardware you control, without an app platform underneath a task that never needed one.
Immich is a high-performance, self-hosted photo and video management solution that keeps your entire library on your own server. It is built to back up, organize, browse, and search photos and videos without handing your memories to a third-party cloud.
Syncthing is a continuous file synchronization program that keeps files in sync between two or more computers in real time. It is decentralized by design: there is no central server that might be compromised, and none of your data is ever stored anywhere other than on your own devices.
Copyparty is a portable file server that turns almost any device into a place to share files over a local network or the internet, with resumable uploads and downloads from any web browser. Access is controlled with per-folder and per-user permissions plus temporary share links.
CasaOS is a personal cloud system that runs on home servers and turns spare hardware into a place to store and manage your own data, apps, and smart devices. It originated as the pre-installed system for the ZimaBoard.
Radicale is a small CalDAV and CardDAV server for sharing calendars, to-do lists, and contact lists. It supports events, todos, journal entries, and business cards, and exposes them through CalDAV, CardDAV, and HTTP.
Twake is a secure open source collaboration platform built to improve how organizations work together. It brings team chat, file storage, a shared team calendar, task management, video calls, and real-time document collaboration into a single digital workplace.
Rockstor is a network attached storage solution built on Linux and the BTRFS filesystem. It ships as a complete Linux distribution and runs as a DIY appliance on commodity PC, Pi 4, and ARM64 hardware.
Sort these by the one Nextcloud job you actually relied on.
Continuous device file sync: Syncthing Syncthing keeps files in sync across two or more of your own devices in real time, with no central server and nothing stored anywhere but your machines. Every device is authenticated by a cryptographic certificate, and transfers run over TLS. It is the focused answer when the only Nextcloud feature you needed was reliable file replication.
Photo and video backup: Immich Immich is a self-hosted home for photos and videos, with mobile apps that back up automatically and a web interface for albums, memories, a map, and a timeline. Search spans metadata, objects, faces, and CLIP content, and it reads RAW files. For anyone whose Nextcloud was mostly phone backup, it is a purpose-built replacement.
Calendars and contacts server: Radicale Radicale is a small CalDAV and CardDAV server for calendars, to-do lists, and contacts, storing everything as plain files in a simple folder structure. It works with many existing clients and secures connections with TLS. When the piece you need from Nextcloud is groupware over standard protocols, it does that one job cleanly.
Browser file server with shares: Copyparty Copyparty turns almost any machine into a file server with resumable browser uploads, per-folder and per-user permissions, and temporary share links. It serves over HTTP, WebDAV, SFTP, FTP, and SMB, and runs from a single Python file. It fits the Nextcloud use of sharing folders and links in the browser.
Almost nobody uses all of Nextcloud, which is the key to replacing it well. Write down what your instance is really for - device file sync, browser file sharing with links, photo backup, calendars and contacts, or genuine team collaboration - because each of those points at a different tool. The mistake is hunting for one program that matches every checkbox; the clean path is accepting two or three focused services with clear boundaries in exchange for dropping an app platform you no longer want to run.
Files split into two distinct jobs that people often conflate. Continuous background sync between your own devices is Syncthing's job, decentralized and with no central server to operate. Browser-based sharing with per-folder permissions and expiring links is closer to Copyparty, which serves files over HTTP, WebDAV, and more. Calendars and contacts are the cleanest thing to move, because Radicale speaks the same CalDAV and CardDAV protocols your clients already use, so events and address books transfer through standard exports rather than a bespoke importer.
Some Nextcloud uses deserve a purpose-built replacement rather than a general one. Photo libraries and phone backup map neatly onto Immich, with automatic mobile upload and face and content search. If you genuinely want one app for everything, Twake keeps chat, files, calendar, tasks, and documents together and self-hosts with Docker. Whatever you pick, move files through WebDAV or a sync client and verify timestamps and checksums; Nextcloud share links, comments, and versions are application metadata that will not survive the trip and should be recreated.
Because the reason to switch is usually the operating model, not the license. Running Nextcloud means maintaining a whole suite even when you use a fraction of it. Moving to a focused tool - Syncthing for pure device sync, Radicale for just calendars and contacts - shrinks what you have to patch, back up, and monitor. You trade breadth for something smaller and easier to keep alive.
Syncthing, if what you want is files kept in sync across your own machines. It runs continuously and decentralized, with no central server, and every device is authenticated by a cryptographic certificate over TLS-encrypted transfers. That makes it lighter to operate than a full suite, though it syncs between devices rather than offering a browser portal, so pair it with something else if you also need web access and share links.
Immich is the purpose-built option. Its Android and iOS apps automatically back up photos and videos to a server you own, and the web interface adds shared albums, a timeline, a map, and search across metadata, objects, faces, and CLIP-based content matching. It reads RAW formats and plays motion photos, which makes it a stronger gallery than Nextcloud's photo handling for people whose main use was phone backup.
Move them through the standard protocols they already use. Radicale is a small CalDAV and CardDAV server that stores events, to-do lists, and contacts as plain files on disk and works with a wide range of existing clients. Export calendars as ICS and contacts as VCF, or sync through CalDAV and CardDAV directly, and test recurring events and shared address books since servers interpret those edge cases differently.
Copyparty comes closest. It is a portable file server offering resumable browser uploads, per-folder and per-user permissions, and temporary share links, over HTTP, WebDAV, SFTP, FTP, and SMB. Be aware that Nextcloud's own share links, passwords, and expiration settings are application metadata that will not transfer, so plan to recreate important shares and redistribute the new links after cutover.
Then a suite still makes sense, just a different one. Twake bundles team chat, file storage, a shared calendar, tasks, video calls, and collaborative documents, and self-hosts with Docker Compose. CasaOS takes another angle as a home-server operating system with a one-click app store that can install many services at once. Both keep the all-in-one convenience while changing what you operate underneath it.
Yes, and two are built for it. CasaOS turns spare hardware into a personal cloud with a web UI and app store, running on amd64, arm64, and Raspberry Pi devices. Rockstor is a full NAS distribution on the BTRFS filesystem, adding storage management and optional Docker apps through its Rock-ons system. Both suit reusing a home machine rather than renting cloud infrastructure.
