Best alternatives to Deltix in 2026

Writing and maintaining automated mobile app tests is one of those chores that teams know they should do more of but often skip, because tools like Appium or XCUITest require real scripting effort that breaks every time the UI changes. Deltix takes a different approach: you describe a user task in plain English — "sign up, add a payment method, and complete checkout" — and an AI agent actually carries it out on an iOS simulator, the same way a human tester would click through the app, then tells you whether it succeeded. It runs in a local execution mode where your source code and app builds stay on your own machine rather than being uploaded anywhere, which matters for teams cautious about handing proprietary code to a third-party service. Beyond one-off task testing, it offers a Playbook mode to save and replay the same test flow repeatedly, and an Experiment mode for A/B comparing different app versions or flows. It also captures screenshots during test runs for later review. Deltix is currently in open beta and free to use, with no credit card required to get started.