Stack AI

Short Intro: Stack AI is a proprietary enterprise AI workflow platform founded in 2022 by MIT PhDs Antoni Rosinol (CTO) and Bernardo Aceituno (CEO), alongside co-founder Melissa Forstell, through Y Combinator. The company raised a $16M Series A in May 2025 from Lobby VC and LifeX Ventures, with personal backing from Vercel CEO Guillermo Rauch and Weaviate CEO Bob Van Luijt, bringing confirmed funding to $19.5M. Stack AI deliberately exited the SMB market to focus entirely on regulated enterprise sectors — its customers include a top-five US defense agency, Nubank, and MIT Sloan, with over 90,000 users having created more than 100,000 AI agents on the platform.

Key Capabilities:

• No-code drag-and-drop canvas builder for constructing agentic workflows without writing code

• 30+ LLM provider integrations including OpenAI, Anthropic, and Google

• 100+ enterprise data connectors covering SharePoint, Snowflake, Salesforce, and Confluence

• SOC 2 Type II, HIPAA, and GDPR compliance with on-premises and VPC deployment options

• Computer use, web access, and multi-agent coordination for AI agent workflows (launched May 2026)

• Document processing with OCR for insurance claims, RFP generation, and sales call auditing

• Investment research and memo generation through live web retrieval combined with internal data sources

• Knowledge management, IT support, and HR onboarding automation as pre-built use case templates

See Stack AI pricing details →