Perplexity built CobbleDB to replace AWS DynamoDB, saving up to $100M a year

Perplexity 自研 CobbleDB 替代 AWS DynamoDB，每年最多可节省一亿美元

Perplexity replaced AWS DynamoDB with its own key-value store, CobbleDB, for fast web scraping. Two engineers and hundreds of Computer agents built the core infra in two months. Hot-storage batch read latency dropped ~5×, from P50 31.4ms to 5.60ms. The CEO says the migration saves up to $100M a year. The post doesn't say whether CobbleDB is open-source or will be offered externally.

Why it matters: Perplexity built CobbleDB to replace DynamoDB, with concrete latency improvements and cost estimates — strong engineering reference. The ding is that this is a single tweet with no independent verification, and CobbleDB isn't open-source or reusable; it's one company's interna...