Atomic Semi

Atomic Semi

Compact semiconductor fab producing chips

Overview

Atomic Semi builds and operates a compact semiconductor fabrication facility to manufacture chips for electronics, automotive, telecom, and more. It uses its own tools and processes to create chips with smaller, more efficient geometries and can offer custom fabrication services to clients. The company distinguishes itself from large fabs by being small, fast, and agile, developing its own manufacturing tools to quickly adapt to new technologies and market needs. Its goal is to provide nimble, efficient chip manufacturing that helps a wide range of tech companies get high-quality chips faster and with flexibility for evolving technology trends.

Significant Headcount Growth

About Atomic Semi

Simplify's Rating
Why Atomic Semi is rated
C-
Rated C on Competitive Edge
Rated C on Growth Potential
Rated D+ on Differentiation

Industries

Hardware

Industrial & Manufacturing

Company Size

51-200

Company Stage

Seed

Total Funding

$15M

Headquarters

San Francisco, California

Founded

2023

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Simplify's Take

What believers are saying

  • Fab2 opened a 120,000-square-foot Austin base in 2026 for R&D and production.
  • The company is hiring across hardware, software, and lithography roles in Texas.
  • Its fab-fab concept can shorten tool iteration cycles and attract sovereign manufacturing interest.

What critics are saying

  • Fab2 still shows no verified revenue, customer volume, yield, or throughput disclosures.
  • The 2026 rebrand from Atomic Semi to Fab2 signals strategy churn and identity risk.
  • If Austin hardware ramps stall, Fab2 becomes an expensive engineering lab, not a fab business.

What makes Atomic Semi unique

  • Jim Keller and Sam Zeloof combine deep chip-design and hands-on fab-building expertise.
  • Fab2 targets small, modular fabs, not billion-dollar megafabs like TSMC or Intel.
  • The Austin, Lockhart, and San Francisco footprint supports iterative hardware development.

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Funding

Total Funding

$15M

Above

Industry Average

Funded Over

0 Rounds

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

Unlimited Paid Time Off

401(k) Retirement Plan

Paid Parental Leave

Commuter Benefits

Wellness Program

Growth & Insights

Headcount

6 month growth

0%

1 year growth

2%

2 year growth

-3%

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