Sandstone
New York, US Β· 35 employees Β· 7 known investors
Sandstone provides AI-driven intake, triage, and matter management software that captures requests from channels like Slack, email, and ticketing systems, automatically handles routine clarifications, and routes work by type, urgency, value, and risk. It is aimed at legal and operations teams needing audit trails and lifecycle tracking for incoming requests.
Also known as Sandstone
Founders & leadership
Investors Β· 7
Also in the syndicate Β· 2
Funding
SEC filings, press & company announcements$30M disclosed across 1 of 2 rounds Β· 2026
- $30MSeries AJun 2026 Β· 4 sources
Lightspeed Venture Partners (lead), Daybreak Ventures, Kearny Jackson, Litquidity Ventures, Mantis VC, Operator Partners, SV Angel
Source β
Source: company announcements and press reports β follow each round's link for the claim.
Company profile
researched Aug 2026Sandstone develops software for corporate in-house legal departments, positioning its product as a "Legal Relationship Management" platform and an AI-native operating system for legal work. The platform consolidates legal data β documents, counterparties, people, matters, obligations, contracts and prior decisions β into a single repository and connects that context to the workflows legal teams run. It is designed for General Counsel, chief legal officers, associate and assistant GCs, practice area leads and legal operations staff at scaling companies and enterprises.
Core product areas include a knowledge repository with playbooks derived from existing templates, redlines and policies; intake and triage that captures legal requests from the systems the business already uses and routes them to owners with the appropriate expertise and capacity; a context map that surfaces counterparty history, prior negotiations, precedent, urgency, value and strategic considerations alongside each request; agentic workflows that triage, redline, draft and respond to comments while respecting permissions across connected systems; and reporting that aggregates cycle times, risk exposure, capacity and deviation rates for benchmarking and business reporting. Agents handle simpler legal work and hand off more complex tasks to lawyers.
Founding story
The company describes its origin in the frustration of in-house legal departments that spend more time on process than progress because context is scattered across email, chat, contracts and point tools; it was built by a team of lawyers, legal operations professionals and engineers to create a "legal control tower" connecting workflows to business context.
Business model
Sandstone sells a software platform to corporate legal departments, with demos booked through its website and named enterprise and growth-stage customers reported at the time of its Series A.
Traction
At the time of the June 2026 Series A the company reported more than 40x revenue growth over the prior 90 days and customers including Wayfair, Grindr, Mercury, Cox Media and ElevenLabs.
Latest developments
In June 2026 Sandstone announced a $30 million Series A led by Lightspeed Venture Partners, following a $10 million seed round led by Sequoia in January 2026. Alongside the round the company said it had increased revenue more than 40x in the prior 90 days and onboarded customers including Wayfair, Grindr, Mercury, Cox Media and ElevenLabs.
βΈFull profile β market position, technology, go-to-market, geography, history, risks & controversies
Market position
Sandstone targets the in-house legal segment, which it and press coverage describe as underserved relative to legal AI tools aimed at private practice such as Harvey and Legora. The company differentiates itself from contract lifecycle management systems, which it characterizes as document-centric, and from Slack-based intake or "control tower" tools it describes as limited in scope. It also faces competition from frontier AI labs expanding into legal, including Anthropic's Claude for Legal.
The company positions three differentiators: intake across all channels where legal work originates rather than a single channel; a single context layer spanning playbooks, precedent and business rationale; and agentic, self-learning workflows that adapt institutional knowledge over time, covering the relationship both before and after signature.
Technology
The platform combines a unified legal context layer with AI agents that interpret request intent, gather context and execute work such as intake, triage, drafting, review, redlining and knowledge retrieval. Playbooks learn from repeated use, workflows are described as agentic and self-learning rather than rigid templates, and the system integrates with tools including Slack, email, Jira, CLM systems and Salesforce while respecting system permissions.
Go-to-market
Direct sales supported by website demo requests and a contact team; the company states its initial user base is legal departments at small and mid-sized businesses, and it works with an advisory panel of general counsel, legal operations leaders and security executives.
In-house legal departments β General Counsel, CLOs, associate and assistant general counsel, practice area leads and legal operations professionals β initially at small and mid-sized businesses, extending to scaling companies and enterprises.
Geography
Headquartered in New York, NY, United States; described in press coverage as a US-based company.
History
Sandstone raised a $10 million seed round led by Sequoia in January 2026 and announced a $30 million Series A led by Lightspeed Venture Partners on 9 June 2026, roughly six months later.
Risks & controversies
Press coverage notes competition from well-funded legal AI startups and from frontier AI labs moving into the legal market.
Compiled by commissioned research from 8 cited public sources β announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed β not independently audited.
Timeline Β· 2
launches, deals, and filingsSandstone announced a $30 million Series A led by Lightspeed Venture Partners with participation from existing investors including Mantis VC, SV Angel, Operator Partners, Kearny Jackson, Daybreak Ventures and Litquidity Ventures. Lightspeed partner Guru Chahal commented on the investment.
$30M source β
Sandstone raised a $10 million seed round led by Sequoia, six months before its Series A.
$10M source β
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
βΈResearch sources Β· 8
primary sources listed
- Sandstonesandstone.com Β· web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Sandstone do?
- Sandstone is an AI-native legal relationship management platform for in-house legal departments.
- Who founded Sandstone?
- Sandstone was founded by Nick Fleisher, Jarryd Strydom, Liam Germain.
- Who are Sandstone's investors?
- Sandstone's investors include Sequoia Capital, Lightspeed Venture Partners, Kearny Jackson, Mantis Capital, Webb Investment Network.
- How much funding has Sandstone raised?
- Sandstone has disclosed $30M raised across 1 of its 2 known rounds.
- Where is Sandstone headquartered?
- Sandstone is headquartered in New York, US.