Spark Mail vs. Microsoft
Side-by-side across both vendors’ full G2 portfolios — reviews, ratings and category coverage aggregated to the company, not a single product.
| Metric | Spark Mail | Microsoft |
|---|---|---|
| Avg. rating | 4.5 | 4.4 |
| Total reviews | 54 | 103,081 |
| Review growth (QoQ) | -80.0% | -71.5% |
| Products on G2 | 2 | 294 |
| Categories covered | 9 | 326 |
| Best category rank | #10 in Email Client | #1 in Business Instant Messaging |
| Small Business | 84.9% | 28.7% |
| Mid-Market | 9.4% | 34.3% |
| Enterprise | 5.7% | 37.1% |