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Regbase

YC X26

San Francisco, US · Founded 2026 · 3 employees · Hiring · 5 known investors

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Regbase provides regulatory monitoring and compliance tracking for lawyers, compliance officers, and business teams across employment law, AI governance, healthcare, privacy, government procurement, climate, private equity, and regulated industries.

Enterprise SoftwareLegalTechUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (X26)

Regbase was founded in 2026 by Natalie Aresta-Katz and Ethan Shea.

NANatalie Aresta-Katz
Natalie Aresta-KatzFounderNatalie Aresta-Katz founded Saponify, a soap business, before starting Regbase. She holds an MBA from Columbia and a degree in sustainable business from NYU Stern, and previously worked as a regulatory researcher at Paul, Weiss law firm.
ESEthan Shea
Ethan SheaFounder, CTOHe previously worked as a staff engineer at Vercel, where he built observability infrastructure and developed an AI agent product, and at Citadel, where he maintained trading data systems. He studied at the University of Washington.

Investors · 5

Andreessen HorowitzreportedMenlo Park · $500K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

CRV (Charles River Ventures)reportedBay Area · $250K – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Long Journey VenturesreportedSan Francisco · $100K – $1M

How we know: Y Combinator's founder network · Not right? Tell us

Waymakersreported

How we know: Y Combinator's founder network · Not right? Tell us

Related companies · 3

RulebaseRulebase provides AI-powered agents for financial services companies to automate customer operations and drive revenue, working across onboarding, reactivation, and retention workflows to convert approved accounts into transacting customers. The platform integrates with existing KYC stacks, CRMs, and support tools to catch stalled accounts and run follow-ups via multiple channels.
QuickbaseQuickbase + FastField provide field service management software that captures field data in real time and syncs it to an office-based operational control system. The solution combines mobile field capture with real-time visibility, work order management, safety tracking, and asset management for asset-heavy, compliance-driven industries including construction, utilities, manufacturing, and healthcare.
homebaseHomebase is a management platform for small businesses that includes team messaging, scheduling, shift tracking, onboarding, and payroll features. It serves restaurants, retail, and other hourly-wage businesses with tools for employee communication, scheduling, and performance tracking.

Companies working in the same space as Regbase.

Legal entities · 1

corporate structure
Regbase Inc.

In the news

Regbase: Al-native Legal Researchycombinator.com · Apr 2026

Frequently asked questions

What does Regbase do?
Regbase provides regulatory monitoring and compliance tracking for lawyers, compliance officers, and business teams across employment law, AI governance, healthcare, privacy, government procurement, climate, private equity, and regulated industries.
Who founded Regbase?
Regbase was founded by Natalie Aresta-Katz, Ethan Shea in 2026.
Who are Regbase's investors?
Regbase's investors include Y Combinator, Andreessen Horowitz, CRV (Charles River Ventures), Long Journey Ventures, Waymakers.
Where is Regbase headquartered?
Regbase is headquartered in San Francisco, US.