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: 11-50. Total funding raised: $40.0M. Latest round: Seed, $10.0M, 2024-01, led by Sequoia Capital. Key investors include Lightspeed Venture Partners, Sequoia Capital, Mantis VC, SV Angel, Operator Partners, Kearny Jackson, Daybreak Ventures, Litquidity Ventures, Bogomil Balkansky, Alex Pall, Drew Taggart.
- Founded
- 2025
- Headquarters
- New York, USA
- Team size
- 11-50
- Total funding
- $40.0M
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
Lightspeed Venture Partners (Series A Lead), Sequoia Capital (Seed Lead), Mantis VC, Advisory network of 20+ prominent General Counsels and F500 legal leaders
Notable customers
Wayfair, Hypertherm, Grindr, Mercury, MasterClass, Cox Media, ElevenLabs
Major milestones
Emerged from stealth / public launch January 2026 with $10M Seed led by Sequoia Capital, Closed $30M Series A led by Lightspeed (June 2026), Named customers including Wayfair, Mercury, MasterClass, ElevenLabs; 40x+ revenue growth over 90 days pre-Series A, Established advisory network of 20+ GCs and legal industry leaders
Growth metrics
Public launch Jan 2026 with Sequoia-led $10M seed; $30M Series A Jun 2026 (Lightspeed). Company reported >40x revenue growth over a recent 90-day period and disclosed enterprise customers (Wayfair, Mercury, MasterClass, ElevenLabs, etc.). LinkedIn company size 11-50.
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.
Latest news about Sandstone
- Sequoia Capital led a 10 million dollar seed round for Sandstone, an AI startup building a system of record for in-house legal teams. The platform integrates with Salesforce to transform institutional
- Sandstone has raised 10 million dollars in a seed round led by Sequoia Capital to build an AI system of record for in-house legal teams. Led by former McKinsey consultant Nick Fleisher, the startup by
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Official website: https://sandstone.com