Etched has raised $700 million at a $21 billion valuation in a round led by Jane Street, the AI chip startup announced on August 18, 2026. The quant trading firm took the lead after testing and then buying Etched’s hardware, and it now has one of the startup’s racks running in its own datacenter. The round roughly doubles Etched’s valuation in about a month. The company closed a $300 million Series C at a $10.3 billion valuation on July 23, 2026, led by Sequoia. Before that, it was valued at $5…