Question: Is there a feature flagging solution that also provides automated rollout monitoring and A/B testing?

Split is a full-featured feature delivery platform that includes feature flag management, software experimentation, and continuous delivery. It offers automated rollout monitoring and A/B testing to help teams move quickly and safely to new features. Split offers 100% feature-level observability and integrates with existing tools, making it a powerful option for product development teams trying to lower risk and increase innovation.

Another option is Statsig, a full-stack feature management and experimentation platform. Statsig offers features like Experiments for automated analysis, Feature Flags for rollout control, and Analytics for data-driven decisions. It also supports experiment management either in a customer's own warehouse or with Statsig's infrastructure, so you can pick what works best for you and your budget.

PostHog is a flexible suite of tools for product analytics, feature flags, session replays and A/B testing. It offers detailed analytics, A/B testing with dynamic cohort support, and built-in surveys. PostHog's flexibility and open-source nature make it a good option for startups and growth-stage companies.