Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

Testimonial.to - Collect video testimonials in the simplest way

Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.

Senja.io - Senja is the easiest way to collect, manage and share testimonials, online reviews and feedback from your customers.

ErrorFeed - Error tracking and exception handling for developers, startups, and freelancers.

Trust - Trust lets you easily create online surveys, collect customer video testimonials and reviews, then display them with beautiful widgets on your business websites.