Which one AI picks, and when.
Data as of Jul 22, 2026 · Based on 6 AI claims comparing the two · See how Parse measures this
Head to head
The two are furthest apart on strength, where Microsoft 365 leads by 27 points.
| Measure |  Fastmail |  Microsoft 365 |
|---|---|---|
| Parse Score | 66 |
| 89 |
| Strength (widest gap) | 37 | 64 |
|---|
| Reach | 56 | 81 |
|---|
| Authority | 58 | 76 |
|---|
