What are some alternatives?
When comparing MySQL Community Edition and Datadog, you can also consider the following products
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
LogicMonitor - LogicMonitor is the SaaS performance monitoring platform for the world's best IT teams. Deploy Fast, Monitor More, Improve Ops.
SQLite - SQLite Home Page
Zabbix - Track, record, alert and visualize performance and availability of IT resources
MongoDB - MongoDB (from "humongous") is a scalable, high-performance, open source NoSQL database.
Site24x7 - Site24x7 offers both free & paid website monitoring services. Monitor websites remotely and receive instant email/sms alerts if your website becomes unavailable. View uptime & performance graphs of your website monitors.