Periodic Labs launches with a $300M seed round to build AI scientists with autonomous labs
Confirmed
The takeaway
Periodic Labs came out of stealth on 30 Sept 2025 with a $300M seed round led by Andreessen Horowitz, one of the largest seed rounds ever.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 4 October 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
Key facts
- Seed $300M led by a16z; with Felicis, DST Global, NVIDIA (NVentures), Accel, plus Jeff Bezos, Eric Schmidt, Jeff Dean, Elad Gil; reported ~$1.3B valuation
- Stated goal: discover new materials, starting with higher-temperature superconductors; builds an autonomous synthesis and characterisation lab in the Bay Area
- Early revenue from semiconductor-industry customers (TechCrunch)
- Bloomberg, 25 Mar 2026: talks at about a $7B valuation; Forbes, 7 May 2026: raising $500M, reportedly led by Anjney Midha’s AMP, at about $7.5B
- No verified discovery announced as of Sept 2026
- Peer Radical AI (founded 2024, CEO Joseph Krause; $55M seed led by RTX Ventures) announced New York’s first fully autonomous materials lab at the Brooklyn Navy Yard on 2026-01-27: ~100 AI-driven experiments a day, $4M project, 115 planned jobs
What happened
Two senior researchers left OpenAI and Google DeepMind to start a company that couples frontier LLMs with robotic labs. The labs produce new experimental data, which the models learn from. Investors backed it at unicorn valuation from day one, and the valuation reportedly rose about fivefold within months.
Why it matters
Periodic Labs is the flagship of the 2025–26 “AI scientist plus autonomous lab” startup wave, alongside Lila Sciences and Radical AI. Money is flowing ahead of evidence: MIT Technology Review noted in Dec 2025 that none of these startups had yet shown a verified breakthrough discovery.
Sources
7 sources from 6 sites. Numbers match the chips in the text.
7 sources: 1 primary, 6 press
Primary
- Governor Hochul: Radical AI establishes New York’s first fully autonomous materials science lab (Jan 27, 2026)governor.ny.gov, official
Press
- TechCrunch: Former OpenAI and DeepMind researchers raise $300M seed to automate sciencetechcrunch.com, press
- TechCrunch: Top researchers set off a $300M VC frenzy for Periodic Labstechcrunch.com, press
- Wilson Sonsini advises Periodic Labs on $300M seedwsgr.com, press
- Bloomberg: Periodic Labs in deal talks at about $7B valuation (Mar 2026)bloomberg.com, press
- Forbes: Former OpenAI researcher to raise $500M for AI science startup (May 2026)forbes.com, press
- MIT Technology Review: AI materials-discovery startups draw investment (Dec 2025)technologyreview.com, press
Changes
- Added Radical AI context (Brooklyn autonomous lab); no close of the reported $500M round found as of Oct 4
- Filed