DevSecOps is the practice of integrating security into every phase of the software development lifecycle rather than treating it as a separate step at the end. It extends the DevOps model of continuous integration and delivery by embedding automated security testing, vulnerability scanning, and compliance checks directly into development workflows and CI/CD pipelines, so security issues are caught and fixed during development instead of after release.
DevSecOps is the principle that security is everyone's responsibility, built into the software development process from the start rather than bolted on at the end. The name combines Development, Security, and Operations to describe an approach where security practices are automated and integrated into the same CI/CD pipelines that build, test, and deploy your code.
NIST SP 800-218 (Secure Software Development Framework) defines the foundational practices: preparing your organization for secure development, protecting the software itself, producing well-secured software, and responding to vulnerabilities. NIST SP 1800-44 goes further, providing specific guidance on integrating security practices into existing CI/CD pipelines and toolchains.
The core idea: security testing should happen automatically, continuously, and as early in the development process as possible.
DevSecOps isn't a tool you buy. It's a set of practices integrated into your existing development workflow:
The DORA research found that the biggest predictor of an organization's application-development security practices is cultural, not technical. Teams where security is treated as a shared responsibility (not a gate that a separate security team controls) have better security outcomes and better delivery performance.
For startups, this is actually good news. You don't have a security team to create an adversarial dynamic with. If you build security into your development workflow from the beginning, it's just how your team works. It's much easier to start with DevSecOps than to retrofit it into an organization that's been shipping without it for years.
Fencer integrates SAST, DAST, SCA, and secrets scanning into a single platform that connects to your existing development tools. Security findings appear inline in your pull requests on GitHub, GitLab, or Bitbucket. Every scan runs automatically on a schedule and on every PR, so vulnerabilities are caught during development rather than discovered in production or during an annual pen test. Fencer generates compliance evidence automatically, so your DevSecOps practices produce audit-ready documentation without additional work.
No, and startups are actually better positioned for DevSecOps than large organizations precisely because they don't have entrenched separation between development and security. The key requirement is automated tooling that integrates with your existing CI/CD pipeline and development workflow. Your developers don't need to become security experts. They need security tools that surface actionable findings where they're already working (in pull requests, not in a separate security dashboard) with clear remediation guidance.
Running a monthly SAST scan or an annual pen test is security testing, but it's not DevSecOps. DevSecOps means security testing is continuous, automated, and integrated into the development process so that findings reach developers while the code is still fresh. The difference is timing and integration. A vulnerability found in a pull request gets fixed in minutes. The same vulnerability found in a quarterly scan requires the developer to context-switch back to code they wrote weeks ago, understand the issue, fix it, and redeploy. DevSecOps also includes the cultural element: security is a shared responsibility across the team, not something thrown over the wall to a security group.
Start with the highest-impact, lowest-effort integrations: secrets scanning (catches credentials before they're committed), SAST (catches code-level vulnerabilities in pull requests), and SCA (monitors your dependencies for known vulnerabilities). These three cover the most common vulnerability types and integrate directly into your CI/CD pipeline. Add DAST once your application has a stable staging environment to test against. Layer in SIEM and runtime monitoring as your infrastructure grows. The priority is to start catching vulnerabilities during development rather than after deployment.
