An honest comparison
XOsign vs Microsoft 365
The short answer: Microsoft 365 gives you Word, Excel, Outlook and Teams, the tools many businesses grew up on. XOsign reads every paper your business already has, connects them, and has the next thing ready. Keep Word and Excel if you love them, and let XOsign be where your papers are read, filed and acted on.
The difference
It reads every paper once
Contracts, invoices, statements and meeting notes are read once and connected, so XO can answer “what did we agree?” with the page that proves it.
See XOdoc →The next thing is ready
A deadline in a contract lands on your calendar. A payment term becomes a reminder. You don’t copy facts from one app to another.
See XOcalendar →Every paper files itself
No folders to build. Each document is filed by client, person and project, and search reads what’s inside.
See XOfiles →Signing is free on every plan
Send anything for signature from the document itself, with no limit and a record anyone can check. Signers need no account.
See E-signature →Know where every copy went
Every download, print and attachment is on record, so a leaked page leads back to where it came from.
See XOtrace →More than one company, one account
Run each of your businesses from one sign-in, each with its own papers.
See Company →
Where Microsoft 365 is stronger
Said plainly, because you should pick what fits.
The tools people already know
Microsoft reported more than 450 million paid Microsoft 365 commercial seats. Your team probably already knows Word and Excel.
Source: Microsoft, checked October 2026Desktop apps that work offline
On plans with the desktop apps, Word, Excel and the rest keep working offline, as long as they go online at least once every 30 days.
Source: Microsoft, checked October 2026Independent security audits
Microsoft has a SOC 2 Type 2 examination of Office 365 every year. We haven’t started ours yet, and our Trust page says so.
Source: Microsoft, checked October 2026A huge marketplace
Microsoft Marketplace lists tens of thousands of solutions, Teams apps included. We connect to fewer today.
Source: Microsoft, checked October 2026
App for app
What you'd use in XOsign for each Microsoft 365 app.
| Microsoft 365 | XOsign | What it does |
|---|---|---|
| Outlook mail | XOmail Beta | Business email that files every message into the Brain, read once. |
| Outlook calendar | XOcalendar | Your events, your team’s busy times and every deadline your papers set. |
| OneDrive | XOfiles | Every paper filed for you, by client, person and project. No folders to make. |
| Word | XOdoc | A document that understands itself: Summary, Clauses, Risks and translation into 40+ languages. |
| Excel | XOsheets Beta | Spreadsheets that open your Excel files, with tables, filters and charts. |
| PowerPoint | XOslides Beta | Presentations in your brand, started from your company’s own facts. |
| Teams meetings | XOmeet Beta | Video calls whose minutes become reminders with one tap. |
| Teams chat | XOchat Beta | Team rooms and direct messages. Bring in any paper with #. |
Use both
You don't have to switch everything on day one.
Bring a few papers
Start with the contracts and invoices you have. XO reads them and shows you what it found.
Your Excel files open here
XOsheets opens the Excel files you already have, with tables, filters and charts.
Move one app at a time
When an app here does the job better, use it. Keep the rest where they are.
Questions
- Do I have to leave Microsoft 365 to use XOsign?
- No. Keep Word, Excel and Teams, bring a few papers into XOsign, and see what XO finds. Move an app over only when it does the job better for you.
- Doesn’t Microsoft 365 already do e-signatures?
- Microsoft offers eSignature for Word documents and PDFs as a pay-as-you-go service billed through Azure, once an admin sets it up (learn.microsoft.com/microsoft-365/documentprocessing/esignature-overview, checked October 2026). In XOsign, signing is free on every plan, including the free one.
- Is XOsign affiliated with Microsoft?
- No. Microsoft 365 is a trademark of Microsoft, and XOsign is not affiliated with, endorsed by, or sponsored by it. Everything on this page about XOsign is built today; everything about Microsoft 365 comes from Microsoft’s own public pages and is dated.
XOsign provides AI-assisted document tools and does not provide legal advice. Explanations, translations, and suggestions are aids to your own understanding — not a substitute for advice from a qualified attorney.
Competitor names and trademarks belong to their respective owners. XOsign is not affiliated with, endorsed by, or sponsored by any company mentioned on this page. Every statement about another vendor is drawn from that vendor's own public pages and is dated in our source file; features and prices change, so check the vendor's page for the current answer. Where we could not check, the table says so rather than guessing.