Best self-hosted API integration platforms for AI agents

API integration platforms are vital for AI agents and SaaS products to interface efficiently with customer tools like CRMs, Slack, and email systems, requiring platforms that manage authentication, credential storage, and execution. While managed cloud platforms are suitable for most, regulated industries and teams with strict data residency or security needs often prefer self-hosted solutions to keep credentials and execution on their infrastructure. Nango, Composio, Paragon, and Arcade.dev are notable platforms, each with unique offerings and limitations regarding self-hosting, open-source licenses, and enterprise requirements. Nango stands out with its open-source model and a free self-hosted edition that maintains customer credentials on user infrastructure, making it the preferred choice for teams needing full control over their data and integration processes. Each platform varies in its approach to hosting, integration building capabilities, and compliance standards, with Nango offering extensive customization and scalability for AI-driven integrations.