COMPARISON
ATOMIC BOOKING vs
MICROSOFT BOOKINGS.
Microsoft Bookings is included free with most Microsoft 365 Business plans. If your organisation runs on Microsoft 365 and your customers are happy booking through Microsoft's UI, it's genuinely a free option. We're not free, but we're different in three ways: customer-facing UX, payment processing, and EU/UK sovereignty (Microsoft's data residency depends on your tenant region — ours is guaranteed).
Their entry price
Bundled w/ M365
M365 Business Standard
Our entry price
£5/mo
Photon · €6/mo
Difference
different deal
see below
EVERYTHING SIDE BY SIDE
WHAT WE HAVE. WHAT THEY HAVE.
| ATOMIC BOOKING Photon · £5/mo | MICROSOFT BOOKINGS M365 Business Standard | |
|---|---|---|
| CORE | ||
| Monthly entry price (paid tier) | £5 / €6 | Bundled with M365 (£10.30/user/mo) |
| Free tier | Yes — Particle, 1 event type | No standalone — requires M365 |
| Lifetime payment option | £129 — Quantum (£99 first 500) | – |
| Unlimited event types on paid tier | ✓ | ✓ |
| Unlimited bookings | ✓ | ✓ |
| Custom branding on booking page | ✓ | ✓ |
| Custom domain (your-brand.com/book) | Add-on £2/mo | – |
| EU/UK SOVEREIGNTY | ||
| Hosting region | Hetzner — Frankfurt + Helsinki | Microsoft Azure (mixed regions) |
| Customer data never leaves the EU/UK | ✓ | Depends on tenant |
| Operating company jurisdiction | United Kingdom | United States (Microsoft Corp) |
| GDPR-native (not retrofit) | ✓ | Yes |
| Subject to US CLOUD Act / FISA 702 | – | ✓ |
| PAYMENTS | ||
| Subscription billing | GoCardless — SEPA + Bacs DD | Microsoft billing |
| Customer paid bookings | Mollie — EU rails | – |
| iDEAL / Bancontact / SEPA support | ✓ | – |
| Wero (EPI European wallet) support | ✓ | – |
| Transaction fee (paid tiers) | 0% (Photon and above) | N/A — no payments |
| Pricing currency | GBP and EUR | GBP, EUR, USD |
| SCHEDULING | ||
| Round-robin team scheduling | Electron tier | ✓ |
| Collective availability | Electron tier | ✓ |
| Workflows & automated reminders | Photon and above | ✓ |
| API + webhooks | Photon and above | Graph API |
| Group meeting polls | – | FindTime add-in |
| Calendar overlay UX | Coming Q1 2027 | – |
| INTEGRATIONS | ||
| Google Calendar | ✓ | ✓ |
| Microsoft 365 / Outlook | ✓ | ✓ |
| Zoom / Google Meet / Teams | ✓ | ✓ |
| Salesforce | Coming Q4 2026 | – |
| WhatsApp Business booking flow | Add-on £3/mo | – |
| AI Receptionist (voice bookings) | Add-on £9/mo | – |
| TRANSPARENCY | ||
| Open source code | AGPL — public on GitHub | – |
| No-show insurance | Add-on £1/booking | – |
| Calendly migration tool | Free first 60 days | – |
| Charity / non-profit discount | 50% off Photon and Electron | M365 nonprofit |
| Student / educator discount | Photon free with .ac.uk / .edu | M365 education |
THE STRUCTURAL ARGUMENT
WHY THE PRICE DIFFERENCE EXISTS.
Microsoft Bookings is "free" if you're already paying for Microsoft 365 Business — but the customer-facing experience is dated, payments aren't built in, and the data residency situation depends on your tenant region. We charge £5 a month and you get a modern booking experience, native paid bookings, and guaranteed UK/EU hosting.
| Payment method | Fee on £100 | Net to merchant |
|---|---|---|
| Stripe (most US schedulers) | £3.10 | £96.90 |
| Mollie iDEAL / Bancontact | £0.29 | £99.71 |
| Wero (via Mollie) | £0.25–0.40 | £99.65+ |
| SEPA Direct Debit (GoCardless) | 1% capped at £4 | £99.00 |
That ~3% gap on every paid booking is the structural saving we pass on. Software margin doesn't depend on cutting features — it depends on cutting card-processor rent.
HONEST TAKE
When Microsoft Bookings is the better choice.
We're not the right answer for everyone. Microsoft Bookings is the better choice if:
- →You're fully committed to the Microsoft 365 ecosystem
- →You don't take paid bookings (Microsoft Bookings doesn't process payments)
- →You don't mind the basic Microsoft-branded booking page UX
- →You need it free and you're already paying for M365
For everyone else — solo professionals, EU/UK teams, agencies, and anyone who's quietly uncomfortable with American SaaS — keep reading.
COMING Q3 2026
Get early access.
Drop your email — we'll let you know the day Photon goes live, and you'll get founder pricing on Quantum (£99 vs £129 lifetime).
We'll email you when Photon goes live. We don't spam, sell your address, or use trackers. Your email is stored on a Hetzner server in Frankfurt and you can ask us to delete it any time.
OTHER COMPARISONS