SynthMonitor

Synthetic user monitoring for critical path testing. Run automated browser tests against your production app on a schedule and get alerted when something breaks.

Built with Rails 7.0, Ruby 3.3.0, PostgreSQL, Tailwind CSS, and Stimulus.

Features

• Scheduled headless browser tests (Playwright)
• No-code multi-step test builder
• Email alerts with screenshots and error details
• Uptime and performance dashboard
• Multi-tenant subdomain-based accounts
• 30-day free trial with Stripe billing

Setup

Prerequisites

• Ruby 3.3.0 (via rbenv)
• PostgreSQL
• Node.js + Yarn

Install

bundle install
yarn install
bin/rails db:prepare
bin/rails db:seed

Run

bin/dev

Visit http://lvh.me:3000 — uses lvh.me for subdomain support in development.

Tests

bundle exec rspec                    # All tests
bundle exec rspec spec/features      # Feature/E2E tests
HEADLESS=true bundle exec rspec      # Headless browser mode

Seed Data

• 3 plans: basic (free), pro ($49/mo), invite (free)
• 3 users on subdomain "testing": Damon (manager, pro), Owen (employee), Ruby (employee)
• 1 demo project ("Demo Shop")