| Channel | Open Rate | Read Within | Reliability | Status |
|---|---|---|---|---|
| SMS / Text | 98% | 3 minutes | Works without internet | Best for Emergency |
| Mobile Push Notification | 55-65% | 5–10 min | Requires app install & internet | High Reach |
| Voice / Auto-Call | ~60% | Immediate | Cellular dependent | Effective |
| 20–32% | Hours | Requires internet access | Low for Emergency | |
| Social Media | ~10% | Variable | Algorithm-dependent | Supplementary |