KV

Workers KV is the storage product I recommend first: a global key-value store with an API you can learn in five minutes. Reads are fast everywhere (hot keys are cached at the edge), writes are cheap, and the free tier is generous enough for real projects.

The one thing you must internalize is that it’s eventually consistent — a write can take up to a minute to be visible globally. For its intended use cases (configuration, feature flags, cached lookups, session-ish data where staleness is tolerable) this is a non-issue. People get burned when they treat it like a database.

The held-back point is for the write throughput limit per key (one write per second) and for the moments the consistency model surprises a teammate who didn’t read the docs. Within its lane, it has been boringly reliable for years — the highest praise infrastructure gets.