# Email Delivery Infrastructure

Ranked by the Vioscale composite score: a confidence-weighted blend of independent signals, not user reviews.

| # | Software | Score | Confidence | Vendor |
|--:|---|--:|---|---|
| 1 | [Twilio SendGrid](https://www.vioscale.ai/software/twilio-sendgrid) | 83.5 | 27% (low) | - |
| 2 | [Mailjet](https://www.vioscale.ai/software/mailjet) | 77.9 | 66% (medium) | - |
| 3 | [Loops](https://www.vioscale.ai/software/loops) | 64.7 | 54% (medium) | - |
| 4 | [Mailtrap](https://www.vioscale.ai/software/mailtrap) | 63.2 | 43% (low) | - |
| 5 | [Haraka](https://www.vioscale.ai/software/haraka) | 55.8 | 31% (low) | - |
| 6 | [SparkPost](https://www.vioscale.ai/software/sparkpost) | 54.4 | 26% (low) | - |
| 7 | [Postal](https://www.vioscale.ai/software/postal) | 9 | 4% (low) | - |

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*Source: Vioscale (https://www.vioscale.ai/categories/email-delivery-infrastructure).*