What is the difference between harness and Jenkins?

Harness is a modern, cloud-native platform for software delivery made smarter by AI embedded throughout. For CD specifically, Harness can pick up builds from Jenkins and deploy them, or use it's own CI module. On the build side of things, Harness uses a plethora of techniques to speed builds from providing fast cloud build servers, to smart caching to test avoidance. As a result, builds are up to 4x faster and developers are able to stay in the flow. With Harness Continuous Delivery, modern deployment patterns like canary, rolling and blue/green are out of the box and accessible through your choice of a visual pipeline designer or yaml. Meanwhile, policy as code and smart templating makes it easy to setup new pipelines in minutes while adhering to your organizations security and governance policies. Harness makes it easy to weave various security scans into your pipeline and automatically gate on preventing new issues from escaping. Similarly, for teams with SLOs, it can pull uptime data from observability tools to consider error budgets at release time. Feature flags capability can also be enabled to support experimentation from within the same pipeline.