Cloudflare storage chooser
KV, D1, R2, or Durable Objects? Five questions about data shape, consistency, and access patterns — plus honest reasons not to pick each one.
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Your Cloudflare storage
Sweet spot
When not to use it
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Comparison table
| KV | D1 | R2 | DO | |
|---|---|---|---|---|
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Anti-recommendations
Runner-up
Why not the others?
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About this tool
Cloudflare gives you four storage primitives on Workers — each optimized for different shapes. Picking wrong shows up as stale KV reads, D1 write limits, R2 used like a session store, or one hot Durable Object melting down.
This chooser scores your answers against each product's sweet spot. Pricing rows are a mid-2026 snapshot — verify on cloudflare.com before you ship.
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