AppSignal

Application performance and error monitoring platform for Ruby, Elixir, Node.js, JavaScript, and Python. Offers error tracking with real-time alerts, performance monitoring down to nanosecond precision, host metrics, anomaly detection, uptime checks, custom dashboards, log management, and background job monitoring.

Trusted by thousands of development teams and built with a Rust-based agent for low overhead. AppSignal differentiates by deep framework support for Ruby on Rails, Elixir, Phoenix, and related ecosystems, often where generic APMs offer weaker integration. OpenTelemetry support extends coverage to PHP, Java, Go, and Rust.

Key capabilities:

• Error tracking with custom tags, issue tracker integration, and detailed stack traces
• Performance monitoring with duration breakdown, slow query detection, and tracing timelines
• Host monitoring for CPU, disk, memory, network, and Kubernetes
• Anomaly detection and alerts on any metric with Slack and email notifications
• Uptime monitoring from multiple global locations with optional public status pages
• Custom metrics dashboards and centralized log management linked to errors

Teams use AppSignal to debug production issues quickly, track background job health via check-ins, and correlate logs with performance data. SDKs integrate with popular frameworks such as Rails, Phoenix, Express, Django, and Next.js, with minimal setup.