Fly.io

Fly.io runs applications on lightweight virtual machines called Fly Machines. Teams package applications for deployment and choose where to run them, using platform tools for networking and operations. A distributed deployment requires application and data design; selecting multiple regions alone does not make an application resilient.

Key features

• Fly Machines. Virtual-machine resources run application workloads with configurable capacity.
• Regional placement. Applications can be placed near their users subject to region and capacity availability.
• Persistent storage. Volumes support data that must survive an application restart.
• Operational tools. Command-line deployment, networking and managed PostgreSQL options complement the compute service.

Who it is for

Developers who want more control over application placement and machine resources than a simple static-site host provides. Teams should be comfortable with application networking, container-style deployment and persistent-data decisions.

Pricing at a glance

Fly.io bills resources by usage, including running machines, volumes and selected network services. Current documentation states no monthly platform fee. Trial access is limited; legacy allowances should not be described as a generally available free production plan.

Pricing model checked on 15 October 2026; confirm current terms on the official product page. No currency conversion or fixed price estimate is used in this profile.

Things to consider

• Stopped machines can still leave billable storage and other resources.
• Cross-region networking and data replication have costs and operational trade-offs.
• Volumes and databases need explicit backup, recovery and availability planning.

Before moving a production workload, record its runtime versions, storage needs, database size and external services. Decide who will own updates and incident response. A small pilot is a better way to establish compatibility than relying on a headline feature list; include a restore exercise and check that the team can retrieve its data independently.

Getting started

1. Read the official documentation and plan information, then write down the features and costs your project needs.
2. Choose a small test environment that matches the application’s runtime and persistent-data requirements.
3. Configure restricted access, domain settings and certificates; keep secrets out of source repositories.
4. Test deployment, backups and restoration with representative data before changing production DNS.
5. Review usage and recurring charges after the pilot, and document a migration or cancellation path.