Heroku is a cloud platform-as-a-service from Salesforce for application developers, startup teams, and SaaS companies that deploys and scales web apps in Ruby, Python, Node.js, Java, PHP, Go, and Scala without managing servers, with Heroku Postgres, Redis, and add-ons covering monitoring, logging, and email. Marketed as a Heroku platform-as-a-service for app deployment, Heroku combines git-push deployments across 7-plus languages, Heroku Postgres managed PostgreSQL, Heroku Redis, Heroku Connect for Salesforce sync, dyno auto-scaling, review apps and pipeline workflows, an Add-ons Marketplace with 200-plus integrations, integrations with GitHub, GitLab, Bitbucket, Slack, Datadog, and major dev tools, plus enterprise SSO. Heroku is a strong fit for startup teams deploying first apps without DevOps hires, SaaS companies scaling beyond hobby tiers, and Salesforce shops syncing data via Heroku Connect.