Etched’s valuation doubles to $21B in a month

Etched on Tuesday announced that it has raised another $700 million at a $21 billion valuation, led by Jane Street after the famed quant fund tested and bought the startup’s AI hardware.

Even by AI standards, this valuation step-up is jaw-droppingly fast. Etched was valued at $5 billion in December. It raised a $300 million Series C at a $10.3 billion valuation in July. Now investors have doubled its valuation to $21 billion, up nearly $11 billion, in a month.

Etched delivers its AI tech as full systems that it calls “frontier inference clusters.” (Etched competitor Nvidia calls its full systems AI factories.)

Co-founder and COO Robert Wachen told TechCrunch that investors are so enthusiastic because Etched has designed two new components from scratch to speed up inference — the computing process that happens after a user submits a prompt.  

“Inference is built in two stages,” Wachen said, “prefill and decode.” In the mathematically and compute-intensive “prefill phase,” the system must understand the prompt, including context. In the memory-intensive “decode” phase, the system generates output tokens, meaning the actual answer the user sees.

Etched created a prefill chip that operates at low voltage, allowing it to pack in more transistors without the typical heat problems of other high-end AI chips. It can therefore process more tokens faster. Etched created a new type of memory and an interconnect for the decode process that the company calls cluster-scale memory.