# Fly.io vs Heroku

**Leader by Vioscale score:** Fly.io

| Attribute | Fly.io | Heroku |
|---|---|---|
| **Vioscale score** | 79 (63% (medium)) | 59.9 (48% (low)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Fly.io Sprites are dedicated virtual machines that provide hardware-isolated Linux environments for AI agents, tools, and evaluations. They feature persistent block storage that survives sleep cycles, automatic checkpointing, and support for executing untrusted code with configurable network policies. | A cloud-based application platform that enables developers to build, run, and scale web applications using managed infrastructure and integrated deployment tools. Supports multiple programming languages and frameworks with Git-based deployment. |
| features.capabilities | `{"hosting":"cloud","regions":"multi","runtimes":"Docker containers, Node.js, Deno, and other containerized runtimes","cli_and_api":true,"build_system":"dockerfile","container_deploy":true,"managed_databases":true,"custom_domains_tls":true}` | `{"hosting":"cloud","runtimes":"Node.js, Python, Ruby, Java, Go, Scala, PHP","cli_and_api":true,"env_secrets":true,"build_system":"buildpacks","git_push_deploy":true,"container_deploy":true,"custom_domains_tls":true}` |
| integrations.count | 5 | 3 |
| integrations.list | `[{"name":"Sentry"},{"name":"Supabase"},{"name":"Upstash"},{"name":"LiteFS"},{"name":"Tigris"}]` | `[{"name":"GitHub"},{"name":"Twilio"},{"name":"Salesforce"}]` |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true,"linux":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"usage","plans":[{"free":false,"name":"Pay-as-You-Go","summary":"Pay only for what you use","features":["Micro VMs","Persistent storage","Private networking","Unlimited users per organization"],"description":"Usage-based pricing for Micro VMs and persistent storage","contactSales":false},{"free":false,"name":"Serious Support","summary":"Starting at $29/month","features":["Dedicated support team"],"commitment":"monthly","components":[{"kind":"fixed","amount":29,"period":"month","currency":"USD"}],"description":"Access to dedicated team of engineers","contactSales":false},{"free":false,"name":"HIPAA Compliance","summary":"$99/month","features":["HIPAA-compliant workloads","BAAs","SOC2 certification"],"commitment":"monthly","components":[{"kind":"fixed","amount":99,"period":"month","currency":"USD"}],"description":"Compliance package for HIPAA-regulated workloads","contactSales":false},{"free":false,"name":"Machine Reservation","summary":"Save 40% with upfront commitment","features":["40% discount vs pay-as-you-go"],"commitment":"annual","description":"Prepay for infrastructure and receive 40% discount","contactSales":false},{"free":false,"name":"Enterprise","summary":"Contact sales for pricing","features":["Custom resource configurations","SLA requirements","Emergency support"],"description":"Custom solutions for larger workloads with SLA requirements","contactSales":true}],"summary":"Usage-based pricing (pay-as-you-go) with optional prepayment for 40% discount. Serious Support from $29/month. HIPAA compliance at $99/month. Enterprise available via contact.","currency":"USD","sourceUrl":"https://fly.io","retrievedAt":"2026-08-01T15:17:23.873Z","startingPrice":{"amount":29,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | - |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | unknown | - |
| pricing.transparent | yes | - |
| reliability.sla_pct | 99.9 | - |
| reliability.status_page | yes | yes |
| security.disclosure_policy | - | yes |
| security.hipaa | yes | - |
| security.iso27001 | yes | yes |
| security.pci | - | yes |
| security.soc2 | yes | yes |

## Capabilities (PaaS & Hosting)

| Capability | Fly.io | Heroku |
|---|:--:|:--:|
| **Deploy** |  |  |
| Git-push auto-deploy | - | ✓ |
| Deploy arbitrary container image | ✓ | ✓ |
| Per-PR preview environments | - | - |
| **Build** |  |  |
| Build system | Dockerfile | Buildpacks |
| Runtime / language breadth | Docker containers, Node.js, Deno, and other containerized runtimes | Node.js, Python, Ruby, Java, Go, Scala, PHP |
| **Scale** |  |  |
| Autoscaling | - | - |
| **Deployment** |  |  |
| Geographic reach | Multi-region | - |
| Hosting | Cloud only | Cloud only |
| **Data** |  |  |
| Bundled managed data services | ✓ | - |
| **Delivery** |  |  |
| Built-in global CDN / edge | - | - |
| Custom domains + automatic TLS | ✓ | ✓ |
| **Ops** |  |  |
| Env vars & secrets management | - | ✓ |
| Instant rollbacks | - | - |
| **Extensibility** |  |  |
| CLI + deploy API | ✓ | ✓ |

*Source: Vioscale. Generated 2026-09-01T17:15:52.937Z. "-" = undocumented, not absent.*