Compare providers
Pick up to three. Scores are curated estimates on a 0–10 scale. Lock-in: higher = worse.
| Dimension | Courier | Knock |
|---|---|---|
| Overall | 8.1 | 8.2 |
| Capability fit | 8.8 | 9.0 |
| Price / performance | 7.2 | 7.2 |
| Latency / reliability | 8.6 | 8.6 |
| Developer & agent DX | 9.0 | 9.0 |
| Privacy / data retention | 7.8 | 8.4 |
| Lock-in risk (higher = worse) | 5.0 | 5.0 |
| Maturity / track record | 8.2 | 8.4 |
| Pricing | Notification orchestration across email/SMS/push/Slack; usage + seat elements. | As of 2026-09-14 (knock.app/pricing): Developer $0 — 10k messages, 500 guide active users, 500 AI agent credits (then $0.01/credit). Starter $250/mo — 50k messages then $0.005/msg,… |