What redundancy do you have to prevent outages?

The infrastructure runs across several regions with replication: if a region fails, traffic fails over without intervention and data stays accessible. Daily multi-region backups cover data loss; runtime redundancy covers service continuity. The SMS delivery components run through several carrier routes: if one route degrades, another takes over — that's what holds the 10-second promise even on bad days. No redundancy achieves absolute zero downtime, and claiming otherwise would be dishonest; the goal is that you never notice.