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Sandstone Raises $30M to Build AI Operating Layer for In‑House Legal

The funding will speed rollout of a platform that unifies company legal context to power AI agents that handle intake, triage and drafting.

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Overview

  • Sandstone announced Tuesday that it raised $30 million in a Series A led by Lightspeed Venture Partners, following a $10 million seed in January.
  • The company says its product creates a single context layer by connecting counterparties, stakeholders, matters, obligations, contracts and history so AI can run intake, triage, drafting, review and retrieval.
  • Sandstone reported more than 40x revenue growth over the past 90 days and said it has onboarded enterprise customers including Wayfair, Grindr, Mercury, Cox Media and ElevenLabs.
  • The startup is focused on legal departments at small and mid-sized companies and emphasizes integration with email, Slack, Salesforce and Jira to replace fragmented contract tools and request inboxes.
  • Sandstone enters a crowded legal-AI market that includes specialist startups like Harvey and Legora and frontier labs such as Anthropic, and the firm says its edge is training AI on company-specific legal context and wiring that context into workflows.