Home Made CobbleDB Replaces DynamoDB at Perplexity to Cut Query Latency 5x and Reduce Cloud Storage

Perplexity replaced Amazon DynamoDB with its own CobbleDB, a Rust-based distributed key-value store, cutting query latency by 5x and reducing cloud storage costs by 20%. The new architecture separates durable storage from hot retrieval to better handle AI search demands at over 200,000 QPS.