# Error Tracking & Performance Monitoring

> Error tracking and performance monitoring for Ruby, Elixir, Node.js, and Python developers. One install, one bill — free for 50K requests/mo, no credit card.

- **Category:** Tools
- **Kind:** Tool
- **Host:** appsignal.com
- **Destination:** https://appsignal.com/
- **Date added:** 2018

This page is part of [Ref Point](https://ref-p.com/index.md), Chris Beltran’s curated library.