Problem

AI products become substantially more useful when they can act across the applications their users already rely on, but building and maintaining those integrations is a costly engineering burden. Corsair describes the underlying pain as APIs that change over time, rotating authentication flows, deprecated routes, inconsistent schemas, provider-specific error handling, token refresh, webhook verification, rate limits, and tenant-isolated credentials. Teams can build much of an integration quickly, but the remaining maintenance work compounds into an ongoing distraction from the core product; closed-source alternatives also limit customers to the integrations on the vendor's roadmap.

The main use case is giving an AI agent safe access to business applications without handing the agent unrestricted credentials. For example, an agent could retrieve financial data from Google Drive and send it through Gmail, or coordinate calendar and Slack actions, while requiring human approval for sensitive or destructive operations. That combination of cross-application automation, credential security, and permission control is the core economic value proposition.

Product / Service

Corsair is an open-source, TypeScript-based integration layer and library for AI agents, dashboards, and workflows. It provides integrations, OAuth and credential management, scoped permissions, MCP tool access, webhooks, and multi-tenant execution. Developers can connect a Corsair instance to an agent and expose integrations without making credentials visible to the agent; tenant credentials, data, and permission handling are isolated, while webhooks are typed and signature-verified.

The delivery model is both self-hosted and hosted. Developers can run the full SDK on their own infrastructure for free, with no per-seat pricing or markup on underlying API calls, or use Corsair's hosted hub and paid plans, listed as free Hobby, $200-per-month Pro, and custom Enterprise. Corsair's stated benefit is to remove the integration plumbing while preserving control: customers can add or fork integrations, keep sensitive data in their own database, and use approval modes that range from read-only access to tightly controlled writes.

Market

Corsair competes in developer tools, open-source integration infrastructure, workflow automation, and the emerging market for AI-agent tool and API connectivity. Its closest alternatives include Pipedream Connect, which offers more than 3,000 integrations for apps and AI agents; Nango, which focuses on open-source integrations and OAuth, API-key, and token-refresh handling; and Paragon, which markets embedded integration infrastructure for customer data sync and AI-agent actions. Corsair's differentiation is its open-source and self-hosted model combined with multi-tenant credential isolation, MCP support, and built-in permission gates.

The company appears to be an early but publicly active venture-backed startup rather than an established revenue-scale vendor. Y Combinator lists Corsair as founded in 2024, part of Winter 2025, active, and a two-person company; its public GitHub repository shows 6,859 stars, 193 forks, and 1,220 commits, indicating meaningful developer interest. Corsair publishes commercial pricing and is backed by Y Combinator, but the available evidence does not disclose revenue or named customers, so it cannot be confirmed as either revenue-generating or definitively pre-revenue.