Okta, founded in 2009 and headquartered in San Francisco, is the world's leading enterprise Identity and Access Management (IAM) platform, listed on NASDAQ in 2017 and acquiring Auth0 for $6.5 billion in 2021.
Supabase is an open-source Firebase alternative headquartered in San Francisco, United States, providing PostgreSQL database, authentication, realtime subscriptions, and storage as a backend platform for building apps.
Clerk was founded in 2019 and is headquartered in San Francisco, USA. It is a next-generation developer-friendly authentication and user management platform focused on out-of-the-box auth experiences for React and modern JavaScript frameworks.
Auth0 is a global leader in identity and authentication platforms founded in 2013, acquired by Okta for $6.5B in 2021, offering Single Sign-On, MFA, and API security.