Cloudflare Workers KV vs Upstash Redis

In an analysis comparing Upstash Global Redis and Cloudflare Workers KV as data storage solutions for Cloudflare Workers functions, several key differences emerge. Workers KV offers a basic key-value store API with expiration features, while Upstash Redis provides a more extensive API including support for complex data structures such as strings, sets, and hashes. Pricing varies with Workers KV being more economical for reads but more expensive for writes compared to Upstash. Upstash's compatibility with Redis offers greater portability across platforms, whereas Workers KV is limited to Cloudflare's ecosystem. In terms of performance, Upstash offers lower read latency across eight regions, whereas Workers KV initially has higher latency but equalizes due to its widespread presence. Both systems ensure eventual consistency, though Cloudflare Workers KV's write latency is notably longer, taking up to 60 seconds for updates to be fully propagated compared to Upstash's near-instant replication. Write throughput is limited in Workers KV to one write operation per key per second, constraining it to read-heavy scenarios, while Upstash supports high write volumes without such restrictions.