21st.dev

CopilotKit

This company provides a frontend stack and SDKs for software developers to integrate artificial intelligence agents and generative user interfaces into applications.

Browserbase

This company provides managed browser infrastructure and developer tools for businesses to build, deploy and scale artificial intelligence agents that interact with web applications.

Inngest

This company provides a durable execution platform for developers to build and manage event-driven workflows, background jobs and artificial intelligence agent infrastructure.

Pen.dev

Pen.dev provides a design editor and IDE extension that allows software engineers to create and edit user interfaces using AI agents.

AgentMail

This company provides an email infrastructure and API that allows developers to create and manage dedicated inboxes for autonomous artificial intelligence agents.

Rezonant

This company develops a workspace that transforms product requirements into technical specifications and tasks for engineering teams using artificial intelligence coding agents.

SkipLabs

This company develops a reactive programming framework and coding agent for software engineers and technical product managers to build production-ready backend services.

LastMile AI

This company provides a platform for software engineers to build, test, and deploy generative artificial intelligence applications and agents.