Cloud Experimentation
Turn any feature flag into an experiment instantly to see how it impacts your user experience and your bottom line.
Run experiments across every team. Product, engineering, and data science teams launch and measure experiments independently, without bottlenecks or scheduling conflicts.
Convert flags to experiments easily. Your existing feature flags are already wired for experimentation, so there is no duplicate setup or new tooling to learn.
Act on results in real time. Get alerted as soon as statistical significance is reached so you can take action quickly.
Experiment Results · checkout_flow_v2
Track metrics in real time. Monitor every rollout across all active flags with automatic metric collection.
Flag-level attribution. Attribute results to the exact flag that caused them. No manual correlation required.
Connect your analytics stack. Integrate Segment, mParticle, Sentry, and Google Analytics for comprehensive coverage.
Segment by any attribute. Break results down by country, device, plan tier, or any custom property your SDK tracks.
Discover hidden patterns. A neutral overall result can hide big wins in one segment and losses in another. Find both.
Target winning segments. Ship to the segments where the experiment won and hold elsewhere until you iterate.
Unified metrics library. Define metrics once and reuse them across every experiment. No more conflicting definitions or duplicate tracking setups across teams.
Shared results and impact cards. Metric Impact Cards and Detail Charts make it easy to share findings and drive stakeholder alignment without manual report-building.
Cross-team collaboration. Centralized notifications and streamlined workflows keep product, engineering, and data science moving together.
increase in release frequency
versions of the app testing simultaneously in production
“Harness makes it possible to really understand how our users respond to changes we make. Now it's easy to know the best change for our users and how we can help them satisfy their creative journey.”
— Jean Steiner, Ph.D., VP of Data Science, Skillshare
Cloud Experimentation lets you turn any feature flag into a controlled experiment instantly. You define metrics, Harness handles the assignment and analysis, and you get statistically rigorous results without standing up separate A/B testing infrastructure.
Harness supports both sequential testing and fixed-horizon testing. Sequential testing lets you reach decisions as soon as significance is detected, which is ideal for rapid iteration. Fixed-horizon testing applies stricter statistical rigor for high-stakes decisions like revenue and conversion experiments.
Harness's patented attribution engine automatically connects metric changes to the exact feature flag that caused them. It tracks metrics in real time across every rollout and integrates with analytics providers like Segment, mParticle, Sentry, and Google Analytics so you never have to manually correlate results.
Yes. Any active feature flag in Harness FME can be converted into an experiment with a few clicks. You select your target metric, define the experiment window, and Harness begins tracking assignment and metric data automatically.
Harness surfaces statistical significance in the results dashboard as data accumulates. With sequential testing, you receive a decision as soon as the threshold is crossed. With fixed-horizon testing, results are surfaced at the end of the predetermined sample period with full confidence intervals.
Enable every product and engineering team to run experiments without bottlenecks.