Smallstep is the world's first Device Identity Platform™, securing access for humans, devices, workloads, AI agents, and MCP-based toolchains with hardware-backed, short-lived certificates. The company stops API key sprawl by proving what is acting — human or machine — and from where.
Smallstep enables Zero Trust security by providing cryptographic identity for all devices, ensuring only trusted, company-managed devices can access sensitive resources like financial data, code repositories, PII, Wi-Fi, and VPNs. It binds credentials to the device's silicon, preventing credential exfiltration, phishing, and impersonation attacks.
The platform supports multi-OS environments including macOS, Windows, Linux, iOS, and Android, and integrates with over 100 tools in the modern tech stack. Smallstep co-developed ACME Device Attestation (ACME DA) with Google at the IETF, a major upgrade over legacy solutions like SCEP, to deliver high-assurance device identity.