Perplexity replaces DynamoDB with CobbleDB for search storage

Perplexity is sharing research on CobbleDB, its key-value database serving web content for search. The company says two engineers and hundreds of always-on AI agents built the core infrastructure in two months.

After replacing DynamoDB, Perplexity reports production measurements showing median batch-read latency falling from 31.4 to 5.60 milliseconds and p99 latency from 123 to 24.2 milliseconds. Its internal cost model estimates savings of at least 20% relative to DynamoDB.

Perplexity says CobbleDB is purpose-built for repeated batch reads of prepared page records. It plans to open-source the database for other AI search teams.