Sandstone has secured $30 million in Series A funding, led by Lightspeed Venture Partners with participation from existing investors like Sequoia. This round follows a $10 million seed round just six months prior and will be used to expand Sandstone's AI-powered workflow automation platform for in-house legal teams at small and mid-sized businesses. The company aims to help these teams triage incoming work and build custom workflows for tasks like drafting and legal analysis.