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Petrarch launch: what they're building and where to launch next

What they're building

Internal industrial company data for frontier labs

Batch
Y Combinator Summer 2026
Industry
B2B
Team size
3
Based
San Francisco, CA, USA

Founders

petrarch.co ↗

See their funding details ↗

Petrarch on the record

What they shipped

  • From its YC profile: Petrarch brings internal company data to frontier labs, starting with manufacturing and industrial companies. We source data including codebases, project files, and payments from bankruptcy courts, then de-identify and prepare the data for model training. (source)
  • Its own site describes it as: "Petrarch helps economically vital businesses prepare their proprietary operational records, cleared and anonymized on premise, so the AI systems building for the physical world can learn from real work." (source)

Who is behind it

  • Ian Lee, Founder/CEO: Founder at Petrarch. Previously Fellow at Meridian AI building training data and GTM infrastructure for AI-native Excel in financial services. Technical Advisor at Scale AI, working on quality filtering and annotation for agentic assistants and reasoning models. BA in Applied Mathematics and Psychology from Harvard. (source)
  • Samuel Hahn, Founder/COO: Founder at Petrarch. Previously led GTM at Magier AI (Techstars '24), building agentic PII-redaction and data-compliance products. Venture analyst at Mainstreet sourcing pre-seed fintech and deeptech. BA in Economics and History from Harvard. (source)
  • Sudhish Swain, Founder/CTO: Founder at Petrarch. Previously built computer vision software for medical equipment identification deployed in California hospitals as Head of Software Engineering at Clean Sweep Group. Research intern at Brigham and Women's Hospital analyzing spatial transcriptomic cancer datasets. BA Integrative Biology at Harvard. (source)

Timeline

  1. 2026: founded, per its YC profile. (source)

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Where else to launch Petrarch

  • Indie Hackers Forum ↗
    Self-promotion allowed
    Audience: IndieHackers; bootstrapped solo founders sharing revenue and behind-the-scenes
  • Hacker News (Show HN) ↗
    Self-promotion allowed, within the community's rules
    Audience: Hacker News readers; engineers, technical founders, infra-curious people
  • Product Hunt ↗
    Self-promotion allowedFree
  • Demand Curve ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • No Code Founders ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • OnlineGeniuses ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • Product Makers ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • ProductLed ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group

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