Achieving 99.999% Uptime as a Startup

TrustedRouter describes a multi-cloud architecture intended to achieve eventual five-nines availability by avoiding single points of failure across GCP, AWS, and Azure, with stateless routers deployed across regions and continents, separate databases, control planes, credentials, and staggered deployments. GCP serves as the primary environment with multi-region Cloud Spanner, while AWS and Azure use Postgres through a common storage abstraction, and each platform uses different trusted execution environment technologies to provide hardware-based attestation and prevent direct production-machine access. The company argues that confidential computing narrows operational and security risks by requiring all changes to be reviewed code shipped as measured machine images. Recognizing that multi-cloud reliability depends on preventing correlated failures, it aims to isolate shared dependencies and uses three equivalent domains hosted through separate DNS providers, with SDKs in six languages automatically failing over between them. Although the design is intended to keep the routing service available during provider, cloud, regional, database, or DNS failures, the company notes that five-nines availability has not yet been demonstrated and will require long-term measured operation, while live per-cloud status reporting is intended to make performance observable.

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