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Categories

Heroku Architecture
- Compute (Dynos)
  - Dyno Management
  - Dyno Concepts
  - Dyno Behavior
  - Dyno Reference
  - Dyno Troubleshooting
- Stacks (operating system images)
- Networking & DNS
- Platform Policies
- Platform Principles
- Buildpacks

Developer Tools
- AI Tools
- Command Line
- Heroku VS Code Extension

Deployment
- Deploying with Git
- Deploying with Docker
- Deployment Integrations

Continuous Delivery & Integration (Heroku Flow)
- Continuous Integration

Language Support
- Node.js
  - Troubleshooting Node.js Apps
  - Working with Node.js
  - Node.js Behavior in Heroku
- Ruby
  - Rails Support
    - Working with Rails
  - Working with Bundler
  - Working with Ruby
  - Ruby Behavior in Heroku
  - Troubleshooting Ruby Apps
- Python
  - Working with Python
  - Background Jobs in Python
  - Python Behavior in Heroku
  - Working with Django
- Java
  - Java Behavior in Heroku
  - Working with Java
  - Working with Maven
  - Working with Spring Boot
  - Troubleshooting Java Apps
- PHP
  - Working with PHP
  - PHP Behavior in Heroku
- Go
  - Go Dependency Management
- Scala
- Clojure
- .NET
  - Working with .NET

Databases & Data Management
- Heroku Postgres
  - Postgres Basics
  - Postgres Getting Started
  - Postgres Performance
  - Postgres Data Transfer & Preservation
  - Postgres Availability
  - Postgres Special Topics
  - Migrating to Heroku Postgres
- Heroku Key-Value Store
- Apache Kafka on Heroku
- Other Data Stores

AI
- Inference Essentials
- Inference API
- Inference Quick Start Guides
- AI Models
- Tool Use
- AI Integrations
- Vector Database

Monitoring & Metrics
- Logging

App Performance

Add-ons
- All Add-ons

Collaboration

Security
- App Security
- Identities & Authentication
  - Single Sign-on (SSO)
- Private Spaces
  - Infrastructure Networking
- Compliance

Heroku Enterprise
- Enterprise Accounts
- Enterprise Teams

Patterns & Best Practices

Extending Heroku
- Platform API
- App Webhooks
- Heroku Labs
- Building Add-ons
  - Add-on Development Tasks
  - Add-on APIs
  - Add-on Guidelines & Requirements
- Building CLI Plugins
- Developing Buildpacks
- Dev Center

Accounts & Billing

Troubleshooting & Support

Integrating with Salesforce
- Heroku AppLink
  - Working with Heroku AppLink
  - Heroku AppLink Reference
  - Getting Started with Heroku AppLink
- Heroku Connect (Salesforce sync)
  - Heroku Connect Administration
  - Heroku Connect Reference
  - Heroku Connect Troubleshooting
- Other Salesforce Integrations

Default slug size limit increased to 1GB

Change effective on 04 March 2026

The default slug size limit has increased from 500MB to 1GB. The slug size limit can still be increased further by opening a support ticket. App owners are encouraged to keep slugs small to ensure dynos boot quickly and reliably.

Build timeouts increased Python 3.12.13, 3.11.15 and 3.10.20 are now available