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Fly.io
What Fly.io is
Fly.io is a developer-focused public cloud for deploying applications and running them as they grow. Fly Machines are lightweight virtual machines for containerized applications and other code, and Fly.io says it routes requests over a global private network to machines closest to users. Deployment targets include Fly Machines, Docker images, and Fly Volumes, and deployment rollback is available. Managed Postgres plans include high availability, automated backups, and connection pooling. Sprites provide persistent Linux computers for agents, with filesystem checkpoints and restore. Their Connectors support GitHub and Slack through OAuth, OpenRouter with a supplied key, custom HTTP APIs, and S3-compatible object stores. Fly.io says connector credentials stay in its control plane and are injected into outbound requests. It also describes isolated tenant kernels, lightweight virtual machines under memory-safe hypervisors, WireGuard network encryption, and Let’s Encrypt TLS for apps. The platform is SOC 2 Type 2 certified, with hardware in ISO 27001 datacenters. A free trial ends after 2 VM hours or 7 days, whichever comes first; paid plans start at $1.94/mo.
Who it suits
Fly.io suits developers deploying containerized applications or other code and teams that want managed Postgres or persistent Linux environments for agents. Trial users should account for the VM-hour and seven-day limits.
What it does well
- Fly Machines run containerized applications and other code
- Global private network routes toward nearby machines
- Managed Postgres includes backups and connection pooling
- Deployment rollback is available
- Community support is available to all customers
What to know first
- No free plan
- Trial ends after 2 VM hours or 7 days
- Storage and egress are priced separately
- Dedicated IPv4 is excluded from the trial
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Premium Support | Per month. · 24-hour response · 1-hour urgent response · dedicated Slack channel · quarterly architecture sessions | $199 a month |
| shared-cpu-1x · 256MB Machine | Billed by the second while a Machine runs; storage and egress priced separately. · 256MB RAM · shared CPU · stopped root filesystem $0.15/GB/month | $2.19 a month |
| Enterprise Support | Starting at $2,500 / mo. · 4-hour 24x7 response · 15-minute emergency response · dedicated Slack channel · 99.9% uptime SLA | $2,500 a month |
| Standard Support | Per month. · 36-hour first response · technical architecture support | $29 a month |
| Managed Postgres Basic | Per month; database storage billed separately at $0.28/GB. · shared-2x · 1GB RAM · high availability · automated backups · connection pooling | $38 a month |
| HIPAA compliance package | $99/mo; available on any paid plan. · BAA pre-signed | $99 a month |
As fly.io lists them, read 3 Oct 2026. The maker's own page has the final word.
Verdict
Fly.io offers application compute alongside managed Postgres and persistent environments for agent workloads. Trial limits and separate storage and egress charges are important to account for when planning use.
Facts from Fly.io's own pages
- Agent environments
- Sprites are persistent Linux computers for agents with filesystem checkpoints and restore. · fly.io, 3 Oct 2026
- Compute
- Fly Machines are lightweight, fast-booting virtual machines for running containerized applications and other code. · fly.io, 3 Oct 2026
- Credential security
- Connectors keep raw credentials in Fly.io’s control plane and inject them into outbound requests so they do not enter Sprites. · fly.io, 3 Oct 2026
- Deployment integrations
- Fly.io lists GitHub and GitLab deployment, Prometheus metrics, log shipping, and configurable health checks as infrastructure integrations. · fly.io, 3 Oct 2026
- Encryption and compliance
- Fly.io says network traffic is encrypted with WireGuard, apps get TLS with Let’s Encrypt, and the platform is SOC 2 Type 2 certified with hardware in ISO 27001 datacenters. · fly.io, 3 Oct 2026
- Global network
- Machines use a global private network, and Fly.io says it automatically routes requests to machines closest to users. · fly.io, 3 Oct 2026
- Integrations
- Sprites Connectors support GitHub and Slack through OAuth, OpenRouter using a supplied key, and custom HTTP APIs and S3-compatible object stores. · fly.io, 3 Oct 2026
- Managed database
- Managed Postgres plans include high availability, automated backups, and connection pooling. · fly.io, 3 Oct 2026
- Product
- Fly.io describes itself as a developer-focused public cloud that is easy to deploy on and designed to grow with applications. · fly.io, 3 Oct 2026
- Security isolation
- Fly.io says its tenants do not share kernels and that containers run inside lightweight virtual machines under memory-safe hypervisors. · fly.io, 3 Oct 2026
- Support
- Community support is available to all customers, while paid support plans provide technical support with stated response times and features. · fly.io, 3 Oct 2026
- Trial exclusions
- Dedicated IPv4 addresses and performance-optimized vCPUs are excluded from the free trial. · fly.io, 3 Oct 2026
- Trial limits
- The free trial ends after 2 total VM hours or 7 days, whichever comes first, and includes up to 10 machines, 20GB of volume storage, 2 vCPUs per machine, and 4GB memory per machine. · fly.io, 3 Oct 2026
Where Fly.io stands on Freedom251
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