Intelligent software testing for your Mendix applications.
Rheonox QA+ records, replays and validates your user journeys. The Debugger catches Mendix anti-patterns that classic tools miss. The Advisor explains what's wrong — and how to fix it.
From Automated Testing to Autonomous Quality
The problem
Why your current Mendix tests fall short.
Tools that don't understand Mendix
Raw Selenium or Playwright don't understand the Mendix structure. Fragile selectors, false positives, constant maintenance.
Invisible anti-patterns
The costliest issues (N+1 queries, unconstrained retrieves, over-nested microflows) never show up in classic reports.
Bugs you can't reproduce
When a bug hits production, your teams spend days reproducing it locally. The technical cause stays opaque.
Modules rejected by IT
Mendix test modules are refused by large-account IT policies. You need to test from the outside, without installing anything in the app.
Our solution
A modular approach in three acts.
1 — Recorder & Replay
Record your journeys with a dedicated Chrome extension. Add visual assertions in one click. Replay automatically on every deployment, no code required.
- • Rich visual assertions (text, state, DOM snapshots…)
- • Smart capture of Mendix selectors
- • Headless replay via Linux runner
- • Reporting inside the Mendix interface
2 — Debugger
Observes your app's internal /xas/ traffic and automatically detects costly anti-patterns: N+1 queries, full-table scans, unconstrained retrieves, microflow cascades.
Key differentiator: nothing to install. Everything runs from the external runner.
3 — Advisor (AI)
Our contextual AI turns technical findings into actionable, plain-language recommendations:
- • "Your Home page loads in 8s because microflow ABC runs 12 retrieves in a loop"
- • "Suggestion: Retrieve over association"
- • "Estimated impact: -75% load time"
Companion tool — free
FAT — Your Mendix app's quality score.
Before you even commit, get a free static diagnosis of your Mendix application's quality. Model analysis, structural-issue detection, a score out of 100.
Get my free FAT score →From capture to fix, in four steps.
Record
Install the Rheonox ACR Chrome extension, click "Start recording", and use your app normally. The extension captures everything in the background.
Validate
Click "Add Assertion" on any element. Choose what to check (text, value, state). A guided modal walks you through it.
Replay
The Linux runner executes your test on every release. Headless, parallelizable up to 12 tests at once.
Understand
Visual report inside the Mendix interface. For performance, the AI Advisor explains what happened and how to fix it.
Under the hood.
| Capture | Dedicated Chrome MV3 extension (Manifest v3) |
|---|---|
| Backend | Native Mendix application (multi-tenant, REST APIs) |
| Runner | Linux + puppeteer-core, up to 12 parallel tests |
| Security | No module in the client app, JWT auth, encrypted data |
| Hosting | Mendix Cloud / Private Cloud / On-premise, your choice |
| Storage | Test videos on sovereign storage (Switzerland) or your own bucket |
| Compliance | GDPR-ready, Swiss hosting available |
| Integrations | Public REST API, webhooks, future Mendix Marketplace |
Security & compliance
Built for large-account constraints.
No installation in your application
The Debugger analyses network traffic captured by the external runner. Your production application stays untouched. No risk, no third-party module.
Sovereign data
The runner can run in your own infrastructure (on-premise, Azure, AWS, OVH). No application data leaves your perimeter.
Contained AI
Models run locally or via sovereign APIs (Swiss hosting). No leakage to public LLMs.
Full audit trail
Every runner action is logged. Auditable compliance for regulated sectors (banking, healthcare, public).
Supported platforms.
Today: Mendix (Studio Pro 10 and 11). Our architecture — capture extension + external runner + Debugger + Advisor — is designed to extend.
Mendix
OutSystems
Power Platform
Appian · Flowable
Simple, transparent pricing.
Free 14-day trial, no credit card. Flat per-tier pricing — no per-seat billing. Intermediate tiers Team (CHF 699) and Pro (CHF 3,499) are also available.
Starter
- Up to 30,000 executions / month
- Full Recorder & Replay
- Visual assertions
- Email support
Business
- Up to 600,000 executions / month
- Recorder & Replay + Debugger
- Mendix anti-pattern detection
- Priority support
Enterprise
- Tailored execution volume
- Recorder + Debugger + AI Advisor
- Dedicated runner in your infrastructure
- SLA, Account Manager, compliance audit
See Rheonox QA+ in action.
14 days free. No credit card required. Up and running in 30 minutes.