--- title: "Mo, the AI QA engineer." description: "Mo is an AI QA engineer. Point it at your app on web, iOS, or Android and get bugs back, each with a recording and repro steps. Try it on your app." canonical: "https://momentic.ai/mo" last-updated: "2026-10-04T16:15:43.432Z" --- # Mo, the AI QA engineer. URL: https://momentic.ai/mo platform / mo Point Mo at your app. It bug bashes your product and files bugs, each with a recording and repro steps. [Try for free](https://app.momentic.ai/mo) [Get a demo](/sales) Works on any web app you can point a URL at. No tests to write or maintain. ## A hundred or more agents per bash. 117,010 bugs caught before deploy 100+ Agents at once on a single bug bash ~20 min From a URL to a filed report 0 Tests to write or maintain 3 Target platforms: web, iOS, Android ## How it works. No tests to write or maintain. Give Mo an objective, then review the report or hand it to your coding agent to fix. 01 ### Point A URL or app build and one sentence about what matters. Mo asks if anything is unclear, then gets to work. 02 ### Bash Mo explores your product across a hundred or more hosted browsers at once, or across hosted simulators and emulators for a mobile build. It works through user flows and follows each failure until it can reproduce it. 03 ### Report Bugs land in the Momentic app with proof attached, while the session is still running. Fix them yourself or hand them to your coding agent. ## What Mo takes off the release checklist. Before a release most teams run one of these passes by hand. Mo runs them on demand, on web, iOS and Android. ### The bug bash A bug bash puts five people in a room with a test plan for an afternoon. Mo sends a hundred or more agents through the same flows at once, then files each finding with a recording and repro steps. You run it whenever you cut a build. ### The dogfood session Dogfooding means a doc of flows that people tick off by hand, and the results stay in that doc. Point Mo at the build instead, and Mo files each flow it broke. The findings arrive while the session is still running. ### Exploratory testing Mo works the way an exploratory tester does: it follows what looks wrong and files what it can reproduce. You get exploratory testing on every build. ### The outsourced QA cycle An offshore cycle runs on its own calendar and reports days later. Mo runs when you ask, on the build you name, and you get the same report every time. The report arrives the same day. ### The regression you keep A bug bash finds a bug once. To keep it covered, schedule Mo to re-run the pass, point it at a day of merged diffs, or write the flow as a Momentic test: plain-English steps in a YAML file in your repo, run by the CLI in CI. Whichever you pick, nobody re-runs it by hand. ### The device and browser matrix A matrix pass means one person opens a browser, then an iPhone, then an Android phone, and repeats the same flow. Start a Mo session for each target and the sessions run at the same time: hosted browsers for web, iOS simulators, Android emulators. Every target is covered without one person repeating the flow. Trusted by teams that ship every day. A Fortune 1000 file-collaboration platform · 700M+ registered users “We pointed it at staging before a release and it found 27 bugs in an afternoon . Nobody wrote a test. The engineers just got the report.” Senior Engineering Manager File-collaboration platform 27 bugs from one bug bash 116 agents exploring at once 2 days of manual QA automated in a single run [30 min daily test execution, down from 7 hours "Momentic gave us a fast and reliable way to validate Poe.com's AI responses, even when they weren't deterministic." Momoko F. Head of Product Operations, Quora](/customers/quora) [8x increase in release cadence "It's like giving someone your QA checklist and watching them execute it for you!" Sriram S. Engineering Lead, Source Control, Retool](/customers/retool) [80% faster release cycles "With Momentic, we've caught bugs that would have eluded even our most diligent internal tests." Alex C. CTO, GPTZero](/customers/gptzero) [6x faster end-to-end test creation "We've already seen a 30% decrease in production incidents thanks to Momentic's automated testing." Hanna K. Head of QA, CoverGo](/customers/covergo) [85% reduction in production incidents "Momentic gives us reliable end-to-end coverage, so we can focus on features instead of maintaining tests." Alec H. Staff AI Engineer, Mutiny](/customers/mutiny) [Browse all](/customers) ## Mo covers web, iOS, and Android. One brief per target. Hosted browsers, simulators, or emulators. [01 Web Point Mo at any URL our hosted browsers can reach, or a local build through a tunnel. It bug bashes the live app.](/web-app-testing)[02 iOS Point Mo at an uploaded iOS build. The bash runs on a Momentic-hosted simulator.](/ios-testing)[03 Android Point Mo at an uploaded Android build. The bash runs on a Momentic-hosted emulator.](/android-testing) ## Mo, answered. How much of my product does Mo actually cover? As much as you point Mo at, on web, iOS, and Android. Mo works through user flows instead of a script, and you set the granularity: a fast smoke pass or every operable control. Test cases and bugs appear in the report while the session runs, and the report lists what Mo didn't cover. Do I ever have to write or maintain tests? No. There is no test suite. You give Mo an objective and read the report. We already point a coding agent at Playwright. Why Mo? A coding agent on Playwright checks one flow at a time, in one browser, on the change it made. Mo runs a hundred or more agents at once: explore agents map the cases, bug bash agents work them, and a reproducer agent confirms each suspected bug before it's filed. We have coding agents but no QA team. Is Mo for us? Yes. Mo is built for teams where agents merge more code than anyone has time to review and nobody owns QA full time. What does Mo need to reach my staging environment? A URL or build our hosted browsers, emulators, and simulators can reach, plus a test account. For a local or private app, a [tunnel](/docs/mo/tunneling) or the Connector image gives Mo a path in. Credentials stay inside the session, and agents never write them into a test case, a bug report, or a recording. How do I start a run? In the app composer, with the [qa CLI](/docs/mo/cli), or on a cron schedule. With the Momentic GitHub App installed, Mo also scopes a session to a pull request and reports back as a PR comment and a status check you can require before merge. Is it safe to run Mo on production? Yes, with boundaries in the brief. You name the actions Mo must not take (submit a payment, delete an order, touch admin surfaces) and the data it must not modify. Most teams still point it at staging first. How does Mo decide what counts as a bug? Each bug in the report carries expected and actual behavior, reproduction steps, and a recording of the failure. A suspected bug goes to a separate reproducer agent first, and a bug it cannot reproduce stays out of the report. Can Mo replace our bug bash? It replaces most of the clicking. Mo covers the flows in your test plan and files what breaks, with a recording and repro steps. Keep people for judgment calls and the flows nobody has written down yet. Can Mo do exploratory testing? Yes, and that is the default. You give Mo an objective instead of a script, and Mo decides which flows to try. We dogfood before every release. Where does Mo fit? Run Mo on the build first, then dogfood. Your team reads a report instead of walking the same flows, and it spends the session on what Mo could not judge. Does Mo replace our outsourced QA team? It replaces the repeat passes, not the people. Mo runs the same flows on demand and reports the same day. Human testers still cover local payment methods and real hardware. Can we keep the flows Mo tested as a suite? Yes, as Momentic tests. A flow Mo covered becomes plain-English steps in a YAML file in your repo. Your coding agent writes that file over our MCP server, and the CLI runs it in CI. How many agents does Mo run at once? A hundred or more on a single bug bash, up to your plan limit. Each agent gets its own hosted browser for web, or a simulator or emulator for a mobile build. How is Mo different from Codex or Devin driving a browser? A coding agent verifies the change it just made: the pages your diff touched, in one browser, in one session. Mo starts from your product instead of your diff, and it splits the work between agents that each have one job. Explore agents map an area and write the cases, bug bash agents work through them, and a reproducer agent confirms each suspected bug. A hundred or more run at once: a hosted browser per agent for a web session, a simulator or emulator for a mobile session. How do you keep false positives out of the report? A suspected bug goes to a separate reproducer agent. That agent starts from a clean browser, with no state or fixtures from the agent that found the bug. It builds the setup itself and follows the flow from the beginning. When it cannot reproduce the bug, or when access blocks it, the bug stays out of your report. Does Mo learn how our product works? Yes. Momentic keeps a knowledge base of your terminology, your rules for the agents and your known flows, and the agents retrieve it on every AI-assisted step. When you mark a finding as works as intended, Mo drafts a knowledge entry from your reason and links it to that finding, so a later run does not report the same behavior again. Do we have to choose between Mo and our coding agents? No. Mo files each finding with a recording, repro steps, and a session link. [qa report](/docs/mo/cli) exports the report as files your coding agent reads and fixes from, so you never describe the bug a second time. Do the bugs go to Jira or Linear? They can. The report lives in the Momentic app; its test cases sync to TestRail, Qase, or Testiny, and an accepted bug files to Jira or Linear. On a pull request run, Mo also reports as a status check. We already have a Playwright suite. Why do we need Mo? Mo needs no test script. You give it an objective or a spec, it explores the running app, writes the cases itself and runs them across many browsers at the same time. Your suite covers the cases someone already wrote, so Mo is how you find the bugs that have no case yet. How is this priced? Mo is self-serve. Sign up and you get $250 in Mo credits on us; after that, Mo runs on the same usage-based credits as the rest of Momentic. A session bills active agent runtime, hosted browser or simulator minutes, and inference. See [pricing](/pricing) for the rates. Still have additional questions? ## Close the feedback loop. Start for free, or book a demo and we'll run it against your app. [Try for free](https://app.momentic.ai/mo) [Get a demo](/sales)