Every M365 backup calculator is run by someone selling backup
We don't sell backup. We work out what your tenant would actually cost to protect, what a scoped policy would cost instead, and where your coverage has holes. If the answer is that you don't need to buy anything, that's what it'll say.
A 300-seat tenant with 10 GB mailboxes, 25 GB archives, 15 GB of OneDrive each and 800 GB of SharePoint pays about $2,738 a month to protect everything at $0.15 per GB. Scoped properly, the same tenant pays about $1,440.
What we're building
Today this is a calculator you fill in by hand. Next, it connects to your tenant with read-only permissions and fills the numbers in for you — measured sizes rather than estimates, plus the things a spreadsheet can't tell you: mailboxes outside every backup policy, leaver accounts about to pass the deletion window, shared mailboxes nobody scoped, and Teams chat, which native backup doesn't cover at all.
We will never store your files or your email. Read-only access, metadata and sizes only.
Start here
| Cost calculator | Your numbers, including the archives and recycle bins the usage reports leave out. |
| What it costs | Worked examples at 50, 300 and 1,000 seats, and where per-user pricing wins. |
| Limitations | What native Microsoft 365 Backup does not cover. |
| PowerShell scripts | Pull real mailbox and site sizes yourself, free, no signup. |