Should you build your own Microsoft 365?
Buy it. At $14 a user you get email, Teams, desktop Office apps and 1 TB each, and nothing home-built comes close.
Short answer
Five people on Business Standard pay about $2,520 over 3 years. That covers Exchange email, Teams chat and meetings, desktop Word and Excel, 1 TB of OneDrive per person, plus Bookings and Forms. Microsoft raised Business Basic from $6 to $7 and Standard from $12.50 to $14 on July 1, 2026, so it now matches Google Workspace on price. A home-built stand-in would cost over $22,000 over 3 years and still lack real mailboxes and Office apps.
- Buy for 3 years
- $2,520 Business Standard, $14/mo × 5 seats
- Build and run for 3 years
- $22,645 340 h to build, 10 h/mo upkeep
- Verdict
- BUY Money and risk combined
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Cheaper options
Microsoft 365 pricing in 2026
| Plan | Billed yearly | Billed monthly |
|---|---|---|
| Business Basic | $7/seat/mo | $8.40/seat/mo |
| Business Standard Typical | $14/seat/mo | $16.80/seat/mo |
| Business Premium | $22/seat/mo | $26.40/seat/mo |
Paying too much? Business Basic ($7 a user) is enough if web and mobile Office apps work for you. You keep email, Teams and 1 TB of OneDrive, and lose the desktop apps and Loop.
Per user, paid yearly, from Microsoft’s US pricing page. The monthly figures are for a month-to-month subscription. Basic and Standard went up on July 1, 2026; Premium did not. Checked October 26, 2026.
Run your own numbers
Defaults are a typical small team at $30/hour. Change anything.
Buying is about $20,125 cheaper over 3 years.
3-year totals. Building includes your time, upkeep, running costs and one month of an AI app builder ($25). Change any number to match your situation.
What you’d build
- Browser editors for documents and spreadsheets, without full Office compatibility
- File storage with share links on cheap object storage
- A team calendar with a booking page
- Team chat and a video room built on hosted services
- Email forwarding into a rented mailbox
A small server for files and docs, backups and a paid mail relay. You still rent real mailboxes on top.
What you’d give up
- Desktop Word, Excel and PowerPoint with full file compatibility
- Exchange mailboxes with spam and malware filtering
- Teams meetings with recordings and transcripts
- Admin controls, device management and file recovery
Risks the price doesn’t show
Mail from a new server lands in spam until it builds a reputation, and one blocklist entry can stop all your email.
Opening and saving .docx and .xlsx files without breaking layout and formulas is a long list of edge cases.
You own patching, backups and account takeovers, and one mistake can lose company files.
When the verdict flips
There is no realistic flip to BUILD. Switch to Google Workspace or Zoho if you do not need desktop Office apps and the bill matters more than a migration.
Sources
Microsoft 365 business plans and pricing · Office Watch on the July 2026 price rise
Build hours are our estimates for one person using an AI app builder. How we score. Spotted a wrong price? Tell us on X @BuildictHQ.
Related verdicts
Google Workspace
Docs & productivity
Buy it. Email, docs, storage and video calls for $14 a user is hard to beat, and none of it is worth building.
- Buy, 3 yrs
- $2,520
- Build, 3 yrs
- $22,045
Grammarly
Docs & productivity
Switch to LanguageTool if spelling and grammar are what you use. It costs about half as much as Grammarly Pro.
- Buy, 3 yrs
- $432
- Build, 3 yrs
- $3,265
Notion
Docs & productivity
Buy it. A shared editor with databases is hard to build, and Notion Plus is only $10 a user.
- Buy, 3 yrs
- $1,800
- Build, 3 yrs
- $9,025