PagerDuty - Cloud based monitoring service
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Dynamic Yield - Personalization & customer experience management
Squadcast - Automate incident response, reduce downtime and enhance your tech teams’ delivery with a unified platform.
Optimizely - A/B testing you'll actually use.