Office Updated July 12, 2026

ONLYOFFICE Documents vs Microsoft 365 Copilot: Which Office Suite Reigns Supreme?

ONLYOFFICE Documents is a free, open-source office suite ideal for users who need offline editing, PDF forms, and MS Office compatibility without a subscription. Microsoft 365 Copilot is an AI-powered productivity hub for Microsoft 365 subscribers, offering intelligent assistance, cloud integration, and team collaboration. Choose ONLYOFFICE for cost-effective standalone editing; choose Microsoft 365 Copilot for AI-driven workflow and deep Microsoft ecosystem integration.

ONLYOFFICE Documents

Rating: ★ 3.13
Downloads: 1,000,000+
Developer: Ascensio System SIA

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Microsoft 365 Copilot

Recommended

Rating: ★ 4.52
Downloads: 1,000,000,000+
Developer: Microsoft Corporation

View on Play Store

ONLYOFFICE Documents

ONLYOFFICE Documents - The ultimate mobile office suite for Android ONLYOFFICE Documents is a free office suite for Android that lets you edit text, spreadsheets, presentations, PDFs, and fill out online forms. Fully compatible with MS Office formats, it supports seamless real-ti…

Pros

Fully compatible with MS Office formats (docx, xlsx, pptx).
Free and open-source with no subscription required.
Offline editing capabilities for documents, spreadsheets, and presentations.
Supports PDF editing and filling out online forms.
Real-time collaboration with other users on shared documents.

Cons

No AI-powered features like smart suggestions or summarization.
Smaller user community and fewer third-party integrations.
Interface can feel less polished compared to Microsoft's app.

Microsoft 365 Copilot

The Microsoft 365 Copilot app is your AI-first productivity app for work. It provides one place for you to chat with your AI assistant, create content, manage projects and quickly find files on the go – helping you get more done, without doing more. With the Microsoft 365 Copil…

Pros

AI assistant (Copilot) can create, summarize, and rewrite content.
Deep integration with Microsoft 365, OneDrive, and Teams.
Very high rating (4.5) and over 1 billion installs, indicating reliability.
Unified hub for files, chat, and project management.
Regular updates with new AI features and security patches.

Cons

Requires a Microsoft 365 subscription for full functionality.
Limited offline capabilities; most features need internet.
Can be resource-heavy on older Android devices.

Final Verdict

Our pick: Microsoft 365 Copilot

For most users, Microsoft 365 Copilot is the superior choice due to its AI capabilities, seamless integration with Microsoft services, and massive user base. However, ONLYOFFICE Documents is a strong contender for budget-conscious users who need full offline functionality and do not require AI assistance. If you already use Microsoft 365, the Copilot app is a no-brainer. If you want a free, feature-rich alternative without subscriptions, ONLYOFFICE is excellent. Overall, Microsoft 365 Copilot wins for productivity and innovation.