# Open-source alternatives to Microsoft 365

> Open-source alternatives to Microsoft 365 that run locally, allow commercial use and need no paid API include GridCraft (spreadsheets (Excel); MIT OR Apache-2.0). CryptPad covers all 5 Microsoft 365 jobs.

Microsoft 365: Paid subscription office suite (Personal, Family and Business plans) with Excel, Word, PowerPoint, online co-editing and OneDrive cloud storage. Pricing: See pricing page (checked 2026-10-15). Facts checked 2026-10-15.

## Projects

| Project | Jobs | Runs locally | Commercial use | Paid services | Hardware |
|---|---|---|---|---|---|
| [CryptPad](https://repoquarry.dev/projects/cryptpad) | spreadsheets, documents, presentations, real-time-collaboration, cloud-storage | Self-hosted server, or hosted public instances; used in the browser | Yes, under AGPL-3.0 copyleft terms; proprietary use needs a deal with the vendor | None required when self-hosted | Server minimum 2 GB RAM, 2 CPUs, 20 GB storage (Debian 12) |
| [ONLYOFFICE Docs (Document Server)](https://repoquarry.dev/projects/onlyoffice-docs) | spreadsheets, documents, presentations, real-time-collaboration | Self-hosted server (Docker, Linux or Windows Server packages) | Yes, under AGPL-3.0 copyleft terms; Community Edition recommended for up to 20 users, larger deployments sold as Enterprise | None required for the Community Edition; paid editions add clustering, admin panel and mobile web editors | Dual-core 2 GHz CPU, 4 GB RAM, 40 GB disk, 4 GB swap |
| [LibreOffice](https://repoquarry.dev/projects/libreoffice) | spreadsheets, documents, presentations | Yes, desktop app | Yes, usable in business at no cost; MPL-2.0 conditions apply if you modify and distribute the code | None required; paid support is optional from ecosystem partners | 256 MB RAM (512 MB recommended) and up to 1.5 GB disk on Windows; 512 MB RAM on macOS |
| [ONLYOFFICE Desktop Editors](https://repoquarry.dev/projects/onlyoffice-desktopeditors) | spreadsheets, documents, presentations | Yes, desktop app that works without an Internet connection | Yes, under AGPL-3.0 copyleft terms (share source of modified versions you distribute or offer over a network) | None required; cloud connection is optional for co-editing | Not documented |
| [GridCraft](https://repoquarry.dev/projects/gridcraft) | spreadsheets | Yes, native desktop app (also a self-hostable WebAssembly build) | Yes, MIT or Apache-2.0; forks must drop the ArtCraft brand assets | None required | Not documented |

## Common questions

### Is there a free, open-source alternative to Microsoft 365?

Yes. CryptPad, ONLYOFFICE Docs (Document Server), LibreOffice, ONLYOFFICE Desktop Editors and GridCraft are free to download and run on your own computer without paid API keys. CryptPad covers every job we list for Microsoft 365; the others cover only part of it, so check which job you need.

### Can I do spreadsheets (Excel) locally without a Microsoft 365 subscription?

Yes, with CryptPad (AGPL-3.0-or-later), ONLYOFFICE Docs (Document Server) (AGPL-3.0) and LibreOffice (MPL-2.0). Check the hardware notes and licence conditions on each page before you start.

### Can I do documents (Word) locally without a Microsoft 365 subscription?

Yes, with CryptPad (AGPL-3.0-or-later), ONLYOFFICE Docs (Document Server) (AGPL-3.0) and LibreOffice (MPL-2.0). Check the hardware notes and licence conditions on each page before you start.

### Which Microsoft 365 alternatives can I use commercially?

Confirmed: GridCraft. With conditions: CryptPad, LibreOffice, ONLYOFFICE Desktop Editors and ONLYOFFICE Docs (Document Server). This is not legal advice; read each licence.

### Does any open-source project replace all of Microsoft 365?

CryptPad covers every job we list for Microsoft 365.

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Source: RepoQuarry (https://repoquarry.dev/alternatives/microsoft-365). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.