Sequoia- and Lightspeed-backed, built around the in-house stack
Sandstone raised a seed round led by Sequoia in January 2026, followed by a Series A led by Lightspeed Venture Partners in June 2026, with a group of Fortune 500 general counsel serving as investors and advisors. Its customer logos include Wayfair, Grindr, MasterClass, Crexi, Mercury, GOAT, Whop, and Anyscale.
The platform integrates with more than 30 business tools, including Slack, Salesforce, and Jira, so legal requests and matter context flow in from the tools an in-house team already uses rather than living in a separate legal-only inbox.
- “Sandstone raises $30M to bring AI to in-house legal teams” , verificado a 2026-09-03
- “Sandstone Raises $10m Seed Led By Sequoia For Inhouse AI Agents” , verificado a 2026-09-03



