02 / Category
Communications
Email, SMS, push, and chat platforms that send and receive messages programmatically. Includes transactional and marketing communication APIs.
Search communications or any THI vendor
Ranked by band, then Headless Index
21 vendors scored
| Twilio | B | 84/100 | N/A | MAY 21, 2026 | -12 |
| Resend | B | 76/100 | 69.4/100 | MAY 21, 2026 | -19 |
| Knock | B | 72/100 | N/A | MAY 21, 2026 | +72 |
| SendGrid | B | 70/100 | — | MAY 21, 2026 | -14 |
| Novu | B | 69/100 | 86.2/100 | MAY 21, 2026 | +69 |
| Postmark | B | 68/100 | 67.6/100 | MAY 21, 2026 | -8 |
| Vonage | B | 67/100 | 81.9/100 | MAY 21, 2026 | -1 |
| Ably | B | 66/100 | 78.9/100 | MAY 21, 2026 | -10 |
| Courier | B | 65/100 | N/A | MAY 21, 2026 | +65 |
| Pusher | B | 60/100 | N/A | MAY 21, 2026 | -16 |
| Mailgun | B | 60/100 | N/A | MAY 21, 2026 | -16 |
| Telnyx | C | 59/100 | 71.4/100 | MAY 21, 2026 | — |
| Customer.io | C | 58/100 | N/A | MAY 21, 2026 | -18 |
| Plivo | C | 56/100 | N/A | MAY 21, 2026 | -4 |
| Plain | C | 53/100 | N/A | MAY 21, 2026 | — |
| Sinch | C | 50/100 | N/A | MAY 21, 2026 | +8 |
| MailerSend | C | 47/100 | N/A | MAY 21, 2026 | — |
| MessageBird (Bird) | C | 43/100 | 90.7/100 | MAY 21, 2026 | — |
| Loops | F | 25/100 | N/A | MAY 21, 2026 | — |
| Zendesk | F | 25/100 | N/A | MAY 21, 2026 | -51 |
| Brevo | F | 13/100 | N/A | MAY 21, 2026 | — |
Comparison
Top 5 across the Headless Index axes
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