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Root cause

Third-party dependency

An upstream provider or another service the product relies on failed.
Incidents per month
October 2025September 2026
71
in 12 months
28
major or critical
1h 55m
median duration
most affected

Incidents

Questions

How common are outages caused by third-party dependency?

71 incidents in the last 12 months across the vendors tracked here were traced to third-party dependency in the vendors' own words.

How is this cause identified?

From the sentences where the vendor explains why the incident happened, or by hand for landmark postmortems. Symptoms like "elevated error rates" are never counted as a cause.

From vendors' own status pages and disclosures. Times as reported. Logos via logo.dev; trademarks belong to their owners.

Weekly: the week's major outages, postmortems and breaches, Saturday mornings.