| Price from | $2.19/mo | $5/mo |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | Yes | — |
| API | Yes | Yes |
| Plans published | 6 | 4 |
| Spec score · Auto Scaling Software | 8.0 (#5) | 7.4 (#9) |
| Spec score · Cloud Computing platform | 8.0 (#5) | 7.4 (#8) |
| Spec score · Cloud Platform as a Service (PaaS) Software | 8.0 (#10) | 7.4 (#19) |
| Spec score · Platform As A Service Paas Software | 7.9 (#9) | 7.3 (#13) |
| Spec score · PaaS tools | 7.9 (#15) | 7.3 (#24) |
| Spec score · Deployment Automation Software | 7.9 (#18) | 7.4 (#27) |
| Product | Fly.io describes itself as a developer-focused public cloud that is easy to deploy on and designed to grow with applications. | Heroku is a container-based cloud platform as a service for deploying, managing, and scaling modern apps. |
| Support | Community support is available to all customers, while paid support plans provide technical support with stated response times and features. | Heroku lists support options from Standard to Signature. |
