Chip design startup Phinity Labs draws Jeff Dean, Uncork Capital into a $5.2M seed

Phinity Labs, a San Francisco company building software agents that design, evaluate and revise computational systems using physical feedback, has raised a $5.2M seed round led by Uncork Capital. Moxxie Ventures and angel investors including Jeff Dean participated, according to the company's announcement on October 8, 2026. Uncork's own investment account corroborated its lead role, and Uncork also names Pear among the backers.

The cofounders, Sonya Jin and Aadi Nashikkar, met at Stanford and arrived at chip design through work teaching AI models. Jin's disclosed background includes model-training data work at NVIDIA and graph machine learning at AWS AI Lab; Nashikkar has worked in synthetic data and post-training and previously built a business that was acquired. The public sources reviewed do not establish current CEO or CTO titles. Phinity previously received pre-seed backing led by Pear through PearX. That pre-seed amount was undisclosed, leaving the company's cumulative funding unknown.

The technical argument is about the search that precedes a chip. A candidate architecture has to be judged against power consumption, performance and area, and the outcome of that evaluation has to inform the next attempt. An engineering team may have several plausible ways to serve a workload but time to examine only a few carefully; making each examination less costly changes how many alternatives are worth considering. Phinity's homepage sets a longer-term marker on that idea: by 2028, a requested chip would become a GDS layout file in weeks. That is a roadmap for design work, not evidence that arbitrary finished chips can already be ordered and delivered autonomously — fabrication and customer requirements still shape the finished device.

The market Phinity is entering is already commercial. Synopsys reported its first 100 commercial DSO.ai tapeouts in February 2023, and Cadence Cerebrus offers AI-based design-flow optimization around power, performance and area, with engineers able to inspect results and control the workflow. Phinity's and Uncork's accounts report favorable task-level results, but the material reviewed does not provide a public, comparable evaluation against those platforms.

On the business side, Phinity reports work with major foundation-model laboratories and an eight-figure annualized run rate. Customer identities and audited financial statements were not disclosed, so the run-rate figure remains company-reported and describes an annualized measure rather than revenue collected over a completed year. Uncork describes commercial partnerships developing alongside Phinity's own chip-design agents.

Neither a valuation nor a detailed allocation of the proceeds was disclosed in the original announcement.