Fly.io

Fly.io uses Anycast networking to route user requests to the nearest available data center where your application is running. By deploying your Docker containers across multiple global regions, you ensure that the physical distance between your server and your users is minimized, significantly reducing round-trip times.

Yes, Fly.io provides Fly Volumes, which are local NVMe drives attached to your virtual machines. This allows you to run databases and other stateful applications that require persistent data storage across restarts, unlike traditional ephemeral PaaS environments.

Fly.io offers a simplified way to run Postgres clusters that are integrated into your private network. While it is not a fully managed 'hands-off' service, Fly provides automated tooling for scaling, failover, and backups, giving you the power of a dedicated database with the ease of a PaaS.

Generally, no. If your application is already containerized with a Dockerfile, you can deploy it to Fly.io using the 'fly launch' command. The platform is designed to run standard Docker containers, making it highly compatible with most modern web frameworks and languages.

Fly.io provides a dedicated migration tool and documentation specifically for Heroku users. By using the 'fly launch' command in a Heroku project directory, the CLI can often detect your settings and automatically generate the necessary configuration to move your app to Fly.io.

Absolutely. Fly.io allows you to point your own domains to your application via CNAME or A records. The platform also provides automatic SSL certificate provisioning and renewal through Let's Encrypt, ensuring your global traffic is always encrypted via HTTPS.

Every Fly.io organization gets a private IPv6 WireGuard mesh network. This allows your different applications and databases to communicate securely with each other over an encrypted tunnel without exposing those internal ports to the public internet.

Fly.io charges based on the resources your application consumes, including VM size (CPU and RAM), storage volumes, and outbound data transfer. There are no flat monthly fees for the platform itself; you only pay for the specific compute and bandwidth used by your deployed instances.

Fly.io offers a generous 'Hobby' allowance that covers a small amount of compute, persistent storage, and Anycast IP addresses for free. As long as your usage stays within these specific resource limits, you can run small applications without incurring any monthly costs.

Fly.io isolates applications using Firecracker microVMs, providing strong hardware-level isolation between different customers. Additionally, all internal traffic is routed over an encrypted private network, and persistent volumes can be encrypted at rest to protect sensitive user data.

Fly.io maintains SOC2 Type 2 compliance, which is a standard requirement for many enterprise-level applications. You can request their latest security reports and compliance documentation through their support channels to satisfy your internal auditing requirements.

Fly.io offers extensive documentation, a highly active community forum where engineers frequently participate, and email-based support for customers on paid plans. The community forum is often the fastest way to get technical advice from both Fly staff and other experienced users.