AppSignal

AppSignal is an all-in-one application monitoring (APM) platform for Ruby, Elixir, Node.js and Python. It combines error tracking, performance monitoring, host metrics, anomaly detection, uptime monitoring, log management, and check-ins into a single developer-friendly tool. The Rust-based agent is lightweight and GDPR-compliant, designed to scale from small apps to thousands of requests, with a 30-day free trial.

• Errors: Detailed error reports, real-time alerts, tag errors, and easy to send issues to trackers
• Performance Monitoring: Slow request alerts, breakdowns, tracing timelines, slow queries/N+1 queries, and dashboards
• Host Monitoring: CPU, disk I/O, memory, network, and Kubernetes metrics
• Anomaly Detection: Alerts on any metric, pre-configured key alerts, Slack/email integrations
• Uptime Monitoring: Global uptime checks and downtime alerts with a free public status page
• Metric Dashboards: Dozens of dashboards, custom dashboards, fullscreen mode, shareable charts
• Log Management: Centralized logs with search/filter and links to related errors/performance issues
• Check-ins: Monitor background jobs and processes with alerts for missed check-ins

• All-in-one visibility across errors, performance, logs, and infrastructure
• Developer-friendly with easy setup and automatic instrumentation
• Real-time alerts and strong integration with issue trackers
• Lightweight, scalable Rust-based agent with low overhead
• GDPR compliant with European data centers and European data sovereignty
• 30-day free trial to try all features without a credit card

• Free plan: 50K requests, 1GB logging, 5-day retention
• Paid plan: €219/month for 250K requests; includes application monitoring and 1GB logging
• Add-ons: Long-term log storage €89/month; HIPAA compliance €89/month
• Enterprise SAML SSO: €449/month
• Availability in EUR/USD, with yearly or monthly billing options
• All plans include access to all features during the trial period