Video SDK from Zoom - Build fully customizable video-based apps
Platypus - Realtime server monitoring and reporting
Amazon Chime - Online meetings and video conferencing
OpsDash - All-in-one solution for monitoring servers, services, uptime and databases. Curated Dashboards. Rule-based alerting.
AuthKey.io - SMS API and WhatsApp Business API
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.