Andreessen Horowitz Leads $47M Series A for Lightfield's In-House Legal AI
Lightfield, which builds AI for in-house legal teams integrated with Gmail, Outlook and Slack, announced its $47M Series A on September 9, 2026 led by Andreessen Horowitz.
Lightfield announced a $47M Series A round on September 9, 2026, led by Andreessen Horowitz.
The San Francisco-based company builds AI that works for in-house legal teams, described on its website as "The legal work, done before it reaches you."
The platform connects to systems where legal requests already arrive, including Gmail, Outlook and Microsoft 365, Microsoft Teams, Slack, Salesforce, Jira, ServiceNow, Ironclad, Zendesk and HubSpot, gathering context from the source thread and internal systems and applying policies and past decisions so finished work arrives written up with the source thread attached. The company states it can connect to these systems in 2 minutes and lists security features including encryption in transit and at rest with per-tenant key encryption, single sign-on via Google and Microsoft, and that data is never used to train generalized, public or third-party AI models.
According to its website, Lightfield handles matters across commercial contracts, data privacy, people operations and corporate work, with features including playbooks for MSA negotiation, DPA fallback, AI contracting, employment investigations, severance and exits, corporate governance, and international expansion, as well as contract management and alerts for renewals and metadata. The site shows examples such as MSA redline review, DPA renewal and subprocessor review, and board consent creation.
The $47M Series A was led by Andreessen Horowitz. No additional participants were named in the announcement materials.
The announcement materials did not specify how the company plans to use the new capital.
No market context or competitive positioning was detailed in the source materials beyond the company's B2B focus on in-house legal teams. The company's website notes it is backed by Y Combinator and is based in San Francisco, California.
About the Company
AI that works for in-house legal teams
Lightfield connects to your email, chat and business systems and does the legal work before it reaches your team. It gathers context, applies your policies and past decisions, and presents the finished work for your approval.