Fastmail vs Microsoft 365: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Fastmail and Microsoft 365 side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, Fastmail leads on lower entry price. We do not name an overall winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Fastmail
Fast, private, and reliable email and calendar hosting for individuals and businesses.
Best for you if:
- • You want privacy focused email
Microsoft 365
Productivity suite by Microsoft
Best for you if:
- • You want complete productivity suite
| At a Glance | Fastmail | Microsoft 365 |
|---|---|---|
Starts at | From $3/user/mo, billed monthly Standard plan | From $6/user/mo, billed monthly Basic plan |
Category | Email Productivity | File Management Productivity |
Rating | 4.5/5 G2 4.2 · Capterra 4.9 28 reviews | n/a |
Free plan | No | No |
Watch out for | n/a | Business plans cap at 300 users. |
Choose Fastmail or Microsoft 365?
Choose Fastmail if
- You want privacy focused email
- You want good features
- Budget matters ($3/user/mo, billed monthly vs $6/user/mo, billed monthly)
- You work in email, not file management
Choose Microsoft 365 if
- You want complete productivity suite
- You want desktop and web apps
- You work in file management, not email
In-Depth Analysis
Fastmail
Fast, private, and reliable email and calendar hosting for individuals and businesses.
Fastmail's pricing is fair, especially for the 'Standard' tier at $5/user/month offering 100GB storage.
Strengths
- Pro: Privacy focused email
- Pro: Good features
- Pro: Custom domains
- Pro: Calendar included
- Pro: No ads
Weaknesses
- Con: Expensive vs Gmail
- Con: Limited integrations
- Con: Smaller ecosystem
- Con: Storage limited
- Con: No free tier
Key features
Microsoft 365
Productivity suite by Microsoft
Microsoft 365 is the default productivity suite for businesses worldwide, and for good reason.
Watch out
Business plans cap at 300 users.
Strengths
- Pro: Complete productivity suite
- Pro: Desktop and web apps
- Pro: 1TB OneDrive included
- Pro: Teams included
- Pro: Familiar interface
Weaknesses
- Con: Subscription required
- Con: Per-user pricing
- Con: Sync issues possible
- Con: Feature bloat
- Con: Privacy concerns
Key features
Plans and prices: Fastmail vs Microsoft 365
| Tool | Plans and prices | Source |
|---|---|---|
| Fastmail |
| fastmail.com/pricing read Oct 19, 2026 |
| Microsoft 365 |
| microsoft.com/microsoft-365/pricing read Sep 29, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Fastmail pricing and Microsoft 365 pricing.
Key Takeaways
Fastmail
- Lower entry price: $3/user/mo, billed monthly vs $6/user/mo, billed monthly
Microsoft 365
- Choose if you want productivity suite by Microsoft
What the data shows
On the data below, Fastmail leads on lower entry price. We do not name an overall winner for this pair.
- Only Fastmail has a published user rating (4.5/5 from 28 reviews); Microsoft 365 has none we can show.
- Fastmail has the lower entry price: $3/user/mo, billed monthly (Standard) against $6/user/mo, billed monthly (Basic) for Microsoft 365.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Fastmail and Microsoft 365 compare in 2026?
On the data below, Fastmail leads on lower entry price. We do not name an overall winner for this pair. Only Fastmail has a published user rating (4.5/5 from 28 reviews); Microsoft 365 has none we can show. Fastmail has the lower entry price: $3/user/mo, billed monthly (Standard) against $6/user/mo, billed monthly (Basic) for Microsoft 365.
What are Fastmail and Microsoft 365 used for?
Fastmail: Fast, private, and reliable email and calendar hosting for individuals and businesses. Microsoft 365: Productivity suite by Microsoft.
What does Fastmail cost vs Microsoft 365?
Fastmail's cheapest paid plan is Standard at $3/user/mo, billed monthly. Microsoft 365's cheapest paid plan is Basic at $6/user/mo, billed monthly. Prices read on the vendors' pricing pages, latest check Oct 19, 2026.
What's the main difference between Fastmail and Microsoft 365?
Fastmail's main strength: privacy focused email. Microsoft 365's main strength: complete productivity suite.