Sandstone
Category: AI in Legal
An AI-native platform that transforms institutional knowledge into agentic workflows to serve as the primary system of record for in-house legal teams. Sandstone was founded in 2025. The company is led by Nick Fleisher. Based in New York, USA. Team size: 1-10. Total funding raised: $10.0M. Latest round: Seed, $10.0M, 2024-01, led by Sequoia Capital. Key investors include ["Sequoia Capital","Mantis VC","Bogomil Balkansky","Alex Pall","Drew Taggart"].
- Founded
- 2025
- Headquarters
- New York, USA
- Team size
- 1-10
- Total funding
- $10.0M
Value proposition
Modernizes legal operations by automating complex tasks and centralizing fragmented institutional knowledge, enabling legal teams to sync seamlessly with cross-departmental business data.
Products and solutions
["Agentic Workflow Engine (AI agents for executing legal tasks)","Institutional Knowledge Management System","Cross-Departmental Data Integration Layer (Syncs with HR, Sales, and Procurement data)","Legal Request & Task Management Interface"]
Unique value
Focuses on 'agentic' execution rather than just search or summarization; specifically designed for the in-house persona to bridge the gap between legal and other business units like HR and Sales.
Target customer
In-house legal departments, General Counsels, and Legal Operations teams at mid-to-large scale enterprises.
Industries served
["Legal Technology","Enterprise Software","Corporate Legal Services"]
Technology advantage
Founded by a specialized team of former McKinsey legal strategy consultants and legal engineers, providing a deep 'founder-product fit' that combines strategic advisory expertise with hands-on AI development.
How they differentiate
Focuses on 'agentic' execution rather than just search or summarization. It acts as a 'system of record' that integrates directly with non-legal business data (HR, Sales, Procurement) to automate cross-functional workflows.
Main competitors
["Harvey AI","Ironclad","Spellbook","Luminance"]
Key partnerships
["Sequoia Capital (Lead Investor)","Mantis VC (Venture arm of The Chainsmokers)","Advisory network of 20+ prominent General Counsels from leading corporations"]
Notable customers
["Undisclosed (Early-access enterprise partners)"]
Major milestones
["Emerged from stealth in January 2024","Secured $10M Seed round led by Sequoia Capital","Established advisory board of 20+ Fortune 500 and high-growth General Counsels"]
Growth metrics
Emerged from stealth in early 2024; backed by an advisory network of 20+ prominent General Counsels.
Market positioning
Early-stage innovator targeting in-house legal departments at mid-to-large enterprises.
Geographic focus
North America
Patents and IP
No registered patents disclosed as of January 2026
About Nick Fleisher
Nick Fleisher is the CEO and Co-founder of Sandstone. Prior to founding the company, he was an Associate Partner at McKinsey & Company, where he spent nearly seven years advising Big Law firms and corporate legal departments on strategy, operational efficiency, and technology transformation. He holds an MBA from the Wharton School and a BA from Vanderbilt University.
Official website: https://sandstone.ai