According to CoinMeta, the search engine Exa announced the completion of a $250 million Series C financing round, led by a16z. Following the investment, the company's valuation soared from $700 million in September last year to $2.2 billion. The funds from this round will be used to expand its proprietary index database, train a new generation of retrieval models, and increase the underlying throughput to handle hundreds of thousands of concurrent requests per second. Exa claims to have indexed 80 billion web pages and aims to catch up with Google's scale next year, with an expected capacity to handle millions of searches per second within two years.