The industry trend toward outsourcing software components to SaaS providers is undeniable. And more applications are becoming disaggregated, API-driven, distributed, and cloud-hosted. Software is indeed eating the world. And SaaS is eating the software.

In fact, more businesses than ever are identifying opportunities where in-house, custom-written software components that are not a core-competency are now being fronted by APIs, and then outsourced to cloud services.

In our latest 2020 State of Application Assembly survey results, we at Auth0 found that indeed, rather than build everything in-house, the majority of development teams are turning to best-in-class SaaS services in a number of specific use cases.

What Did We Learn?

We wanted to sample teams actively considering outsourcing SaaS services like payment processing, authentication, security, messaging services, and others - and better understand the who, how, and when they did so. With such broad adoption of cloud services, some companies may still be hesitant to turn to SaaS for what they consider business-critical functions — even when those functions are not core competencies of their team.

We investigated the number of apps built per team, who the apps are built for, which apps are commonly used based on company size, and the relative use-cases of top SaaS services.


  • We saw a small, but significant, percentage of product managers and security team members still building their own apps.
  • Regardless of company size or team size, 51% of teams were responsible for two to five applications and 27% were responsible for more than five.
  • More than 75% of apps built were built for externally-facing audiences.
  • Dev teams tended to rely on SaaS largely for payments, messaging, data augmentation, and authentication, helping them to focus on their own differentiated core products.

How You Can Learn More:

The complete survey report is available free-of-charge on - More relevant information you might also find useful:

About Auth0

Auth0 provides a platform to authenticate, authorize, and secure access for applications, devices, and users. Security and application teams rely on Auth0's simplicity, extensibility, and expertise to make identity work for everyone. Safeguarding billions of login transactions each month, Auth0 secures identities so innovators can innovate, and empowers global enterprises to deliver trusted, superior digital experiences to their customers around the world.

For more information, visit or follow @auth0 on Twitter.