The State of Homegrown Auth Report
The 2025 State of Homegrown Authentication Report, sponsored by FusionAuth and Cloudelligent, provides the first deep dive into the tech stacks and team dynamics of organizations building their own identity systems. While many teams opt for in-house solutions for better security and customization, the data reveals significant risks, including the fact that 20% of respondents have experienced a security breach.
Key findings from this inaugural study of 144 IT practitioners include:
- Architecture Trends: 67% of teams build their systems from scratch or roll their own auth server rather than using third-party providers.
- The Tech Stack: Java, JavaScript, and C++ remain the top languages, with 72% of teams running auth in containerized or Kubernetes environments.
- Productivity Benchmarks: Passport.js and Spring Security are rated as the top libraries for both long-term maintenance and initial time to value.
- Team Composition: 60% of teams involve senior-level staff, yet only 23% of those contributors are considered identity specialists.
- Infrastructure Preferences: Roughly half of development teams prefer local environments over SaaS tools for building and testing auth-related flows.
Download the full report to compare your own identity infrastructure against your peers and understand the features, protocols, and challenges shaping the future of custom authentication.




