AWS Lambda - Automatic, event-driven compute service
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Google Cloud Run - Bringing serverless to containers
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Spot.io - Build web, mobile and IoT applications using AWS Lambda and API Gateway, Azure Functions, Google Cloud Functions, and more.
Google Cloud Functions - A serverless platform for building event-based microservices.