ONLYOFFICE 10.0: Self-Hosted AI Office Suite (2026)

Published October 15, 2026. All facts verified October 15, 2026 against the ONLYOFFICE announcement, the vendor’s dev.to release notes, and independent coverage.

If you self-host your stack because you do not want client data leaving your infrastructure, ONLYOFFICE 10.0 is worth your attention. The autumn release — shipped October 10, 2026 — puts context-aware AI inside every editor (documents, spreadsheets, presentations, and PDFs) while letting server deployments connect any model, including one running locally on your own hardware. Around 50 new features, more than 1,000 bug fixes, and about 35 fixed security vulnerabilities round it out.

But the release that reads like a clean win in the announcement has a few sharp edges the vendor downplays: AI was removed from the open-source builds, and the self-hosted 10.0 packages were still rolling out as of mid-October. Here is what is genuinely new, what it costs, and who should actually upgrade.

Table of Contents

What is new in ONLYOFFICE 10.0

The headline changes fall into three buckets: AI in every editor, a move from one fixed workspace to modular apps, and a serious round of editor-level upgrades. Security is the fourth pillar — roughly 35 vulnerabilities fixed in a single release, which matters a lot now that office software is another place where AI agents can read files, call tools, and automate actions.

The numbers: ~50 new features, 1,000+ bug fixes, 35 security fixes, across the online, desktop, and mobile editors.

AI in every editor — with models you choose

Every editor now has a dedicated AI Tools tab that reads the context of the open file, so the AI works with what is actually in your document rather than producing generic output. What it can do differs per editor:

Editor	What the AI can do
Document	Summarize, rewrite, or simplify long passages; translate in place; proofread; build a table of contents; suggest titles; apply formatting
Spreadsheet	Generate and explain formulas; analyze datasets; spot trends; build forecasts and Pivot Tables; clean messy data, flag outliers, fill missing values
Presentation	Create outlines and slide titles; write bullet points and a storytelling flow; generate speaker notes and visual ideas
PDF	Answer questions about the document; one-click summary; draft emails from the content; redact sensitive information

Beyond the built-in prompts there are three building blocks: Quick AI actions (one-off jobs like changing a paragraph’s tone), AI assistants (run continuously and react as you edit), and saved prompts (reuse your favorite requests in AI Chat with one click). One caveat: Quick AI actions and AI assistants are currently available in the Document Editor only — the other editors get the chat, not the automation.

Your model, your call

This is the part self-hosters should care about most. Cloud users enable ONLYOFFICE AI through OpenRouter by topping up a wallet — it is a paid service. Server deployments can connect any model, including local ones — Ollama, LM Studio, GPT4ALL, or your own hosted endpoint — so sensitive documents never leave your infrastructure. You can also set a default model and assign different models to specific tasks: a small fast model for summarizing, a bigger one for formula generation.

If you want a local model to point at it, see our guide to running Ollama — it pairs naturally with this release.

The honest trade-off: running a local model keeps data in-house but moves the bill from API tokens to GPU time. Budget accordingly.

Open-source builds: AI is now a separate install

Here is the catch the headlines skip. Based on community feedback, built-in AI was removed from the open-source versions of ONLYOFFICE 10.0. AI tools are now installed separately, so the base install stays lean.

That is a defensible design decision — you do not want a model connection baked into every install — but it changes the upgrade story. If you deploy the open-source build and expect AI to just be there, you will be waiting on the second install step. The modular approach keeps the core editor lightweight for anyone who never wants AI near their documents, which is a legitimate audience: legal, healthcare, and finance teams with strict data-handling rules get the secure editor without any model attached at all.

Modular apps: AI Agents, Forms, Files, Rooms

Version 10.0 replaces the old single fixed workspace (the DocSpace concept) with modular apps you mix and match. Four ship free under the AGPL v3 license:

AI Agents — automates the workspace with intelligent search, a personalized knowledge base, and extended reasoning, powered by MCP servers
Forms — build surveys and analyze responses with AI assistance
Files — centralized document storage with granular access controls
Rooms — secure collaboration workspaces, including Virtual Data Rooms for confidential content

In the cloud the apps are on by default; on self-hosted servers a single command installs them. This is the right call architecturally: IT departments get granular control over deployment size and attack surface, and smaller teams can skip everything except the editors.

The MCP-powered AI Agents app is the one developers should watch. The agent-infrastructure story is the same thread we covered in our Together Link guide — models are commodity, the integration layer is where value lands. Here the integration layer is an office suite your users already open every day.

The editor upgrades worth your attention

Beyond AI, 10.0 ships the kind of practical improvements that matter in daily work:

PDF Editor: redact metadata before you share a file (hidden info removal), automatic table recognition when editing text, reusable signatures in forms, customizable annotations (border, background, opacity)
Spreadsheet: a faster engine — style and data are now stored separately and operations process only the cells they need. The conditional aggregation family (SUMIF, AVERAGEIF, COUNTIFS, SUMIFS, AVERAGEIFS, MAXIFS, MINIFS) is optimized, plus formula-range highlights and function-constant hints while you type
Presentation: new Outline, Reading, Notes Page, Notes Master, and Handout Master views; export decks as GIF or video
Document: follow a co-editor’s cursor in real time (pair-reviewing specs gets much easier), more reliable RTL support for Arabic/Hebrew documents
Desktop Editors: an AI chat is available before you even open a document — and it talks to ChatGPT, Claude, Mistral, Gemini, Groq, xAI, DeepSeek, or local models through Ollama/LM Studio/GPT4ALL. Odoo joins the supported cloud providers
Mobile: the free iOS and Android apps gain an AI assistant with new providers (including Grok and DeepSeek), AI AutoFill for forms, and voice input

The honest catches

No release is all upside. Here is what to know before you plan anything:

The self-hosted 10.0 build was still rolling out as of mid-October. Cloud and desktop builds are out; self-hosted packages trail behind. Check the official download page for your distribution before you schedule an upgrade window — do not assume the packages are there just because the announcement is.
Open-source AI is a separate install now. If you run the community build, factor the extra step into your deployment notes.
Cloud AI is paid. It runs through a Wallet top-up, not a free included service. If you are cost-sensitive, the self-hosted route with your own model is where the economics work.
Quick AI actions and assistants are document-editor only for now. Spreadsheets, presentations, and PDFs get chat-based AI, not the automation layer.
Advanced Excel users should test first. Independent reviewers note that heavy macro users may hit limits with complex VBA setups, and the suite has fewer built-in integrations than the Microsoft or Google ecosystems. The suite’s strength is Office-format fidelity — open your five ugliest real files and check them before you commit.

Should you upgrade? A decision guide

Upgrade or adopt if you are:

A developer embedding a document editor into your product — the modular app model and BYOM AI make 10.0 the most flexible integration surface ONLYOFFICE has shipped
An IT admin with data-residency requirements — local models plus on-premise editors is the strongest privacy story in the office-suite market right now
A small team that wants Office compatibility without a per-seat Microsoft subscription — the desktop editors are free

Hold off if you:

Live inside Teams, SharePoint, and Outlook all day — the integration gap is real
Depend on advanced Excel macros or Power Query — test your actual workbooks first
Want AI that works the moment you sign in with zero setup — the Wallet + model configuration is a small project, not a toggle

How to try it

The cheapest way to evaluate is a free cloud account — enough to click through the AI tab in all four editors and test the model routing. If you like what you see, the desktop editors are free downloads and run the AI chat against local models. For production self-hosting, plan the upgrade around the rollout: the cloud builds are current, the self-hosted packages were still landing as of mid-October 2026, so confirm your distribution’s package before you start.

A fair two-week trial: open your five most complex Word and Excel files and check layout, tables, and formulas; run your biggest spreadsheet against the new engine; co-edit a document and try the cursor-follow feature; redact a dummy PDF and confirm the metadata is gone; and try AI on non-sensitive content first, then decide which model you trust with real files.

Verdict

ONLYOFFICE 10.0 is the rare office-suite release that is genuinely interesting to developers: context-aware AI you can wire to your own models, a modular AGPL-licensed app layer with an MCP-powered agent app, and meaningful performance work in the spreadsheet engine. The staggered self-hosted rollout and the separate AI install for open-source builds are real friction — but for teams that self-host to keep data in-house, this is the first office suite release where the AI story and the privacy story point the same direction.

ONLYOFFICE 10.0: The Self-Hosted AI Office Suite You Can Actually Control (2026)