About AppSignal
AppSignal is an error tracking and performance monitoring service for developers building apps in Ruby, Elixir, Node.js and Python. It brings errors, traces, logs and metrics into one place.
What it does
AppSignal records every exception with its backtrace and groups them so patterns are easier to see. Performance views show response times, throughput and slow endpoints, and distributed tracing follows a request across services. Logs can be searched and filtered, streamed live, and linked to the exact traces they belong to. Log-based alerts can fire on any pattern, such as an error string or a spike in warnings. An MCP server lets AI coding assistants read errors and traces so they can suggest fixes.
Key features
- Error tracking with backtraces and grouping
- Performance monitoring for endpoints and queries
- Distributed tracing across services, in beta
- Log search, live tail and trace-linked logs
- Log-based alerts on any pattern
Who it's for
Developers and small product teams running Ruby, Elixir, Node.js or Python applications who want error and performance data without running their own stack. Teams that prefer one install and one bill are a good fit.
Pricing and good to know
The service has a free tier for up to 30,000 requests a month, and the site advertises a 30-day full-featured trial with no credit card needed. Paid plans are priced by usage, and the page lists plans starting at zero. Distributed tracing is still marked as beta on the page.
Highlights
- Error tracking with backtraces and grouping
- Performance monitoring of endpoints and queries
- Log search, live tail and trace-linked logs
- Log-based alerts on any pattern
