Experiment Engine (by Optimizely) is a full‑stack experimentation platform that lets product, engineering, and data teams run server‑side A/B tests, feature flags, and multivariate experiments with robust statistical analysis. Below is a curated list of 20 alternative tools that provide comparable A/B testing, feature‑flag, and experimentation capabilities for web, mobile, and backend environments.
Get targeted exposure with custom position pinning and highlighted placement.
Classic visual A/B testing platform for websites and landing pages with a drag‑and‑drop editor, real‑time results, and personalization.
All‑in‑one conversion optimization suite offering A/B testing, split URL testing, heatmaps, and on‑page personalization.
Enterprise‑grade testing and personalization engine integrated with Adobe Experience Cloud, supporting AI‑driven recommendations.
Privacy‑focused A/B testing platform for marketers and developers with advanced statistical models and multi‑page testing.
Full‑stack experimentation suite offering A/B testing, feature flags, and visual editor for web and mobile experiences.
Open‑source feature flagging and experimentation platform that can be self‑hosted or run in the cloud, with SDKs for 30+ languages.
Feature flag management and experimentation platform focused on reliability, targeting, and robust analytics for product teams.
Industry‑leading feature flag service that includes experimentation capabilities and real‑time targeting for web, mobile, and server.
Google’s integrated A/B testing solution for mobile apps, leveraging Remote Config, Analytics, and Cloud Messaging.
Experimentation layer built on top of Amplitude’s product analytics, enabling data‑driven feature rollouts and A/B tests.
AI‑powered experimentation platform offering A/B testing, personalization, and predictive targeting for web and mobile.
Enterprise personalization suite with A/B testing, product recommendations, and cross‑channel targeting.
Server‑side testing platform that runs experiments without client‑side code, ideal for high‑traffic e‑commerce sites.
Developer‑centric SDK‑based experimentation platform for backend, mobile, and IoT environments.
Mobile‑first experimentation platform supporting A/B testing, feature flags, and multivariate tests across iOS, Android, and React Native.
Feature flag and experimentation platform built by Meta, offering low‑latency SDKs and powerful statistical analysis.
Open‑source feature flagging and A/B testing service that can be self‑hosted, with a simple UI and REST API.
Landing‑page optimization tool that automatically routes visitors to the highest‑converting variant using AI.
Landing‑page builder with built‑in A/B testing, heatmaps, and personalization for marketers.
Conversion rate optimization suite featuring A/B testing, surveys, and on‑site personalization.