Fly.io has raised $25 million in Series D funding to expand its computing infrastructure for artificial intelligence agents and appointed former Docker CEO Scott Johnston as its new CEO. The round was co-led by Dell Technologies Capital and Intel Capital, with participation from Andreessen Horowitz, EQT, Geodesic and Y Combinator.
Andreessen Horowitz General Partner Martin Casado and Dell Technologies Capital Managing Director Daniel Docter will join Fly.io’s board.
Fly.io provides connected computing infrastructure designed for AI agents and the applications they create and operate. Its systems include durable disk storage, secure connections with external systems, and the ability to scale across millions of instances.
The company argues that production AI agents require long-running, stateful computing environments rather than the temporary execution sandboxes associated with earlier AI applications.
Fly.io reported its strongest quarter in company history, driven primarily by workloads involving AI agents.
More than 37,000 customers use the platform, including over 8,000 agent-native businesses. Revenue from Fly.io’s largest agent-native customers increased nearly 12-fold during the previous 12 months.
Agent-native companies now generate approximately two-thirds of revenue among Fly.io’s largest customers. Customers include Firecrawl, Kilocode and Plastic Labs.
Johnston previously served as CEO of Docker and held leadership roles at Puppet, Loudcloud and Netscape. He will also join Fly.io’s board.
Founder Kurt Mackey will remain a board member and transition into an advisory role focused on the company’s long-term technical direction.
KEY QUOTES:
“Agents, the new interface for people, need real computers of their own. Whoever gets that infrastructure right will define the next decade of computing.”
“Fly has been building toward this for years, and I joined to help build the category and scale the company driving it.”
Scott Johnston, CEO of Fly.io
“Fly has spent years building infrastructure for that shift and is giving agents real computers instead of disposable sandboxes.”
Martin Casado, General Partner at Andreessen Horowitz
“The rise of AI agents just means we need powerful, easy infrastructure even more than we did before, and we’re going to need serious focus and speed to get there.”
Kurt Mackey, Founder of Fly.io
