Perplexity built its search database with two engineers and AI agents
Perplexity published research on September 15, 2026 describing CobbleDB, a key-value store purpose-built for the repeated batch reads that serve prepared web page records to its search product. It replaced DynamoDB in production. Median batch-read latency fell from 31.4 to 5.60 milliseconds and the p99 from 123 to 24.2 milliseconds, and the company's internal cost model estimates at least 20 percent savings against DynamoDB. Perplexity says two human engineers and hundreds of proactive, always-on AI agents built the core infrastructure in two months, and that it plans to open-source CobbleDB.