What is StackOne?
StackOne offers a robust integration infrastructure designed to empower AI agents by enabling seamless connectivity to hundreds of SaaS systems. Spanning critical enterprise functions such as Sales, ERP, Support, and Messaging, its platform is powered by an AI-first integration engine. This engine adeptly manages complex tasks including authentication, rate limiting, multi-tenancy, and real-time data transformations, allowing AI agents to execute actions across enterprise software efficiently. StackOne supports diverse connection protocols like MCP, A2A, AI SDKs, and Rest API, while incorporating built-in prompt injection defense and permissions governance to ensure secure and reliable operations.
How much funding has StackOne raised?
StackOne has raised a total of $23.6M across 2 funding rounds:
Angel/Seed
$3.6M
Series A
$20M
Angel/Seed (2024): $3.6M with participation from Playfair Capital, Episode 1 Ventures, and Portfolio Ventures
Series A (2025): $20M led by Workday Ventures, Episode 1 Ventures, XTX, and Playfair
Key Investors in StackOne
Playfair Capital
Playfair Capital is a London-based venture capital firm specializing in pre-seed investments, known for its selective approach and commitment to building strong foundations for growth in early-stage companies.
Episode 1 Ventures
Episode 1 Ventures is a UK-focused venture capital business investing in software-driven companies with high growth potential, typically providing initial institutional investment.
Workday Ventures
Workday Ventures accelerates innovation by connecting early-stage enterprise technology companies with Workday's customer base and community, focusing on shaping the future of enterprise technology.
What's next for StackOne?
With substantial backing from strategic investors, StackOne is poised for significant expansion. The company's focus on providing a comprehensive integration solution for the burgeoning AI agent market positions it for accelerated adoption. Future developments will likely involve enhancing its connector library, further refining its AI-first integration engine, and potentially exploring new enterprise verticals. The strategic investments signal strong market confidence in StackOne's ability to bridge the gap between AI capabilities and the operational needs of businesses relying on diverse SaaS ecosystems.
See full StackOne company page
