OnlyOffice Community Server

Last reviewed Sep 13, 2026 · 767 words

Most people who go looking for "self-hosted ONLYOFFICE" want the Document Server, the editor engine that plugs into Nextcloud and gives you Word-compatible editing in a browser. Community Server is the other half: a full collaboration portal with document management, mail, projects, CRM, calendar and a people directory, packaged as ONLYOFFICE Workspace. It is the closest open-source thing to a private Microsoft 365 tenant, and it costs you 4 GB of RAM before a single user logs in. Decide which one you are actually after before you deploy either.

Two products, one brand, one common mistake

The Document Server is stateless: it opens a file, runs the editing session, saves back to whatever storage called it. Community Server is stateful: it is the storage, the user directory, the mail client and the project tracker, and it calls Document Server to edit. Workspace bundles Community Server, Document Server, a Mail Server and a control panel into one install. If you already run Nextcloud, you want Document Server alone and you can stop reading. If you have no file server yet and want mail, tasks and contacts under one login, Community Server is the product this guide covers.

Resource cost: 4 GB is the floor, not the target

The 4,096 MB minimum in the catalogue reflects a .NET application, a MySQL database and an Elasticsearch search index, plus the Document Server (Node.js with its own PostgreSQL and RabbitMQ) running beside it. A Workspace host with 2 CPU cores and 4 GB will boot and then swap the first time three people open spreadsheets. The realistic comfortable spec is 4 cores and 8 GB, with the heavy lifting happening on the Document Server side. That puts this outside Raspberry Pi territory and squarely in "an old office desktop or a mid-tier VPS".

The install itself is scripted: ONLYOFFICE publishes a workspace-install.sh that pulls the Docker images and wires the containers together. It works, but it assumes it owns the machine, taking ports 80 and 443 and expecting to run its own reverse proxy. Fitting it behind an existing Caddy or Traefik is possible and documented, but budget an afternoon.

What you get that Nextcloud does not

Three things stand out. Projects: milestones, tasks, Gantt view, time tracking, with discussion threads per project. CRM: contacts, opportunities, a simple sales pipeline, invoices generated from it. Mail: a real IMAP client with folders, filters and templates inside the portal, and the bundled Mail Server if you want to host the mailboxes too. All three integrate with the document library, so a signed agreement in CRM opens in the editor without leaving the page. For a 5- to 30-person team that would otherwise pay per seat for Microsoft 365 Business, that integration is the pitch, and the Microsoft 365 alternatives page puts it against the other candidates.

What to watch: the product line has moved on

ONLYOFFICE's development energy in the last few years has gone to DocSpace, a newer room-based collaboration product, and to the Document Server. Community Server still receives releases and security fixes, but the pace of new features has slowed, and the GitHub repository at 3,161 stars reflects a mature codebase rather than a busy one. That is not a reason to avoid it for a stable internal portal. It is a reason to check the release dates on the GitHub page before you plan a 5-year deployment around modules like CRM that are unlikely to gain much.

Backups are the other watch item. State is split across MySQL, the document storage directory, the mail store and the Document Server's own database. The control panel has a backup function that bundles these; use it rather than copying volumes by hand, and test a restore on a scratch VM once, because the restore path assumes matching versions.

What I'd do

If the team already lives in Nextcloud, install Document Server only and ignore Community Server entirely. If you are standing up an office for a small company from nothing, run Workspace on a dedicated 4-core, 8 GB VM, put it behind your own reverse proxy, turn on the built-in backup to an external target, and treat the CRM and projects modules as a bonus rather than the reason. For a single person or a family, both are too much: CryptPad or Nextcloud with Collabora covers document editing at a quarter of the memory. The office category lists the lighter options.