SaaS reliability rankings

Every vendor is scored from its own public status feed — the same source, the same window (60 days), for all vendors. No private data, no vendor input, no black box.

The score starts at 100 and subtracts capped penalties: weighted downtime (up to 50), critical outages (up to 20), slow recovery / MTTR (up to 15), and incident frequency (up to 15). Downtime is impact-weighted: a full outage counts fully, a major degradation 75%, a minor issue 25%.

Each incident’s counted duration is capped by severity (critical 48h, major 24h, minor 8h) so a vendor that transparently logs every advisory isn’t penalized versus an opaque one that closes tickets quietly. This is deliberately conservative: it understates rather than inflates downtime.

144 catalog vendors could not be scored this window (status feed unreachable) and are excluded rather than guessed.