📢 Sponsored: Check out Susan's Sudoku - A free daily sudoku puzzle.

intermediate

Upright

Synthetic monitoring engine with Playwright and Prometheus metrics

Updated Feb 19, 2026
Price: Free

Description

Upright is a self-hosted synthetic monitoring system. It provides a framework for running health check probes from multiple geographic sites and reporting metrics via Prometheus. Alerts can then be configured with AlertManager.

|

Site overview with world map | 30-day uptime history

Probe status across all sites


Features
  • Playwright Probes - Browser-based probes for user flows with video recording and logs
  • HTTP Probes - Simple HTTP health checks with configurable expected status codes
  • SMTP Probes - EHLO handshake verification for mail servers
  • Traceroute Probes - Network path analysis with hop-by-hop latency tracking
  • Multi-Site Support - Run probes from multiple geographic locations with staggered scheduling
  • Observability - OTLP compatible, Prometheus metrics, OpenTelemetry tracing, and AlertManager support
  • Configurable Authentication - OmniAuth integration with support for any OIDC provider

Not Included
  • Notifications - Instead, Alertmanager is included for alerting and notifications
  • Hosting - Instead, you can use a VPS from DigitalOcean, Hetzner, etc.

Components
  • Rails engine
  • SQLite
  • Solid Queue for background and recurring jobs
  • Mission Control - Jobs to monitor Solid Queue and manually enqueue probes
  • Kamal for deployments
  • Prometheus metrics for uptime queries and alerting
  • AlertManager for notifications
  • Open Telemetry Collector - logs, metrics and traces can be shipped to any OTLP compatible endpoint

More from Basecamp

Fizzy

The Kanban tracking tool for issues and ideas by 37signals

View Details →

Campfire

Super simple group chat, without a subscription. And you get the code, too.

View Details →

Writebook

Instantly publish your own books on the web for free, no publisher required.

View Details →

More "Standalone App" Projects

keygen

A fair source software licensing and distribution API built with Ruby on Rails.

StarryWeather

A modern weather application built with Ruby on Rails and iOS, featuring real-time weather data, beautiful UI animations, and seamless cross-platform integration.

Campfire

Super simple group chat, without a subscription. And you get the code, too.

More "Open Source" Projects

Turbo Native Directory

A place to discover Turbo Native applications and share learnings on building them.

RailsDevs

The reverse job board for Ruby on Rails developers.

Flexile

Payroll & equity for everyone, by helping you onboard and pay qualified remote contractors to help you grow your business cost-effectively.

More "Free" Projects

DailyLog

A Ruby on Rails web application that uses Turbo Native, iOS, and Android app to track my daily habits like exercise, medication, food, and water.

Jumpstart Pro

Jumpstart Pro is the best Ruby on Rails SaaS template out there. Focus on your business, not on the boilerplate.

Kamalify

Create a working Kamal config by just filling out a form.

More "Real World Example" Projects

Gumroad

Sell your stuff. See what sticks.

Campfire

Super simple group chat, without a subscription. And you get the code, too.

HostedGPT - A free ChatGPT clone

A free, and open-source ChatCPT alternative built using the latest Ruby on Rails and Hotwire features.

Stay updated with the latest Rails projects

Join our newsletter to get updates on new Rails projects and resources.

    We won't send you spam. Unsubscribe at any time.