AppSignal is an application performance monitoring platform that brings error tracking, performance monitoring, logs, uptime checks, host metrics and cron and background job monitoring into a single interface. It is aimed at development and engineering teams. It offers first-party integrations for Ruby, Elixir, Node.js, JavaScript and Python, with framework support such as Rails, Phoenix, Django and Express, while Go, Java, PHP and Rust are covered through OpenTelemetry. You install a language-specific package in your application and use AppSignal as a hosted service.
AppSignal is headquartered in Amsterdam and describes itself as an independent company. Its team works remote-first from several countries, including the Netherlands, the United Kingdom and the United States. According to the vendor, customer data is stored in the European Union and the service is GDPR compliant. For a European organisation this is relevant because it keeps both the contracting party and the storage location within the EU. The website does not mention a self-hosted edition or open-source code for the service itself, so you remain dependent on the vendor's hosted service.