Free alternatives to Microsoft 365

This is one of the clearer alternative decisions, because the free options are mature and the paid case rests on specific, identifiable requirements rather than general capability.

Google Docs, Sheets and Slides

Strongest for collaboration and for anyone who works primarily in a browser. Real-time editing is better than the desktop Office experience, and storage is included at the free tier.

Weaker for complex spreadsheets, heavy formatting, and offline work. Files convert on import and complex formatting does not always survive the round trip.

LibreOffice

A complete desktop suite, free, that works offline and handles Office formats reasonably well. For someone who wants installed applications without a subscription, this is the direct replacement.

The interface feels dated compared with Office, and very complex documents can lose formatting when exchanged. For personal use neither matters much.

OnlyOffice

Worth knowing about because its Office file compatibility is generally the closest of the free options, and its interface is more familiar to Office users than LibreOffice’s.

If exchanging .docx and .xlsx files with Office users is your main concern but you do not want to pay, this is usually the best fit.

Where free genuinely falls short

Advanced spreadsheet work — pivot tables, complex formulas, macros — is where Excel remains meaningfully ahead. If your work depends on this, the alternatives will frustrate you.

Exact formatting fidelity in documents that pass between people is the other. In a workplace or academic setting where a document must look identical on someone else’s screen, the risk is real.

Do not forget what you are also cancelling

Microsoft 365 includes substantial cloud storage. If you cancel and were relying on it, you need a replacement — and paying separately for equivalent storage can cost close to the subscription you just cancelled.

Calculate the storage separately before deciding, because this is the factor that most often reverses the decision.

The migration is where switching actually fails

People decide to switch and then abandon it halfway, ending up paying for both. The step that prevents this is doing the migration in one deliberate session rather than gradually.

Move documents first, verify a handful open correctly in the new tool with formatting intact, then move email and calendar if those are involved. Only after all three are verified should you cancel.

Test with your most complex file, not your simplest

The usual mistake is testing compatibility with a plain document, concluding everything works, and discovering the problem weeks later on something that matters.

Open your most formatting-heavy document — the one with tables, tracked changes or complex layout — and check that specifically. If it survives, the rest will.

Collaboration is the real constraint

If you work alone, free alternatives are genuinely sufficient for most people. If documents pass between you and others who use Office, every round trip risks formatting drift.

That risk is cumulative rather than one-off, which is why workplace and academic users usually end up back on Office even when the individual features are not needed.

Before you switch, move your files

Cancelling reduces cloud storage to the free tier, and files above that limit generally become read-only rather than being deleted. Move anything important out first and confirm current terms with the provider — the order matters here.