Loadmill API Testing

API Testing built for Heroku. Move fast without breaking things. Starting at $0/mo.

One-click continuous testing

Leveraging Heroku’s dedicated APIs to run your tests automatically every time your app is deployed. No configuration required.

Automatic test generation

Loadmill will scan your application and analyze user flows to create API tests for you automatically.

Low-code Web IDE

Code, record, debug and run tests with a complete development environment in your browser.

AI-assisted test recorder

Speed up test development by 10x. Record complex user flows and replay them as API tests—Loadmill will automatically extract tokens, credentials, and entity Ids into parameters.

Track application performance

Track and compare application performance with previously deployed versions to detect and prevent regression.

GitHub integration

Connect your pipeline to your GitHub repository and automatically test every review app. Test results will be visible within pull requests and will update their status.

Free implementation session

Need help creating your first tests? We will assist you in integrating Loadmill and get you onboard 100% free. 1:1 demo or a tech session to get you connected, we got your back.

Production testing

Schedule your tests to run every hour on 10 minutes and get notified in case your production environment goes down.

Load testing

Run your API test scenarios at scale to simulate thousands of users simultaneously. Measure response time and throughput under load to find the best dyno configuration for your app and cut costs.

Region Availability

The available application locations for this add-on are shown below, and depend on whether the application is deployed to a Common Runtime region or Private Space. Learn More

  • Common Runtime
  • Private Spaces
Region Available
United States Available
Europe Available
Region Available Installable in Space
Virginia Available
Oregon Available
Frankfurt Available
Tokyo Available
Sydney Available
Dublin Available

Plans & Pricing

    • API Test runs per month 100
    • Concurrent Users 50
    • Load test minutes per month 60
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 100
    • Concurrent Users 50
    • Load test minutes per month 120
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 200
    • Concurrent Users 50
    • Load test minutes per month 120
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 300
    • Concurrent Users 100
    • Load test minutes per month 120
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 500
    • Concurrent Users 100
    • Load test minutes per month 200
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 750
    • Concurrent Users 200
    • Load test minutes per month 200
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 1,000
    • Concurrent Users 300
    • Load test minutes per month 300
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 1,000
    • Concurrent Users 1,000
    • Load test minutes per month 1,000
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 2,500
    • Concurrent Users 1,000
    • Load test minutes per month 1,000
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 2,500
    • Concurrent Users 2,500
    • Load test minutes per month 2,500
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 10,000
    • Concurrent Users 1,000
    • Load test minutes per month 1,000
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
    • API Test runs per month 5,000
    • Concurrent Users 8,000
    • Load test minutes per month 3,000
    • CI/CD integration
    • Unlimited users
    • Test scheduling
    • Real time email alerts
    • In-app support
    • Dedicated expert support
    • IP whitelisting
Install Loadmill API Testing
heroku addons:create loadmill

To provision, copy the snippet into your CLI or use the install button above.

Loadmill API Testing Documentation