Smallstep

Smallstep is an open-source toolkit to automate certificate administration and secure infrastructures. The job it does: controlling who can log in to what, with single sign-on and MFA.

It makes the most sense for IT and security teams. Alongside the main category they mention Identity Management, Network Security and Open Source. They are a small team, 11 to 50 people, which usually shapes who they work with. You will probably talk to the people who build it, which is great until you need 24/7 support.

Smallstep is based in San Francisco, California. You can read more at smallstep.com.

Before you commit, look at app catalog coverage, provisioning, and audit logs. Get the renewal terms in writing before the first invoice.

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