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Fly.io

Computers for agents·fly.io

Fly.io is a global public cloud for running full-stack and AI applications, with customer workloads that are hardware-isolated for security and can scale horizontally and vertically. Core building blocks include Fly Machines (fast-launching Firecracker VMs with a REST API), Fly Sprites (persistent, checkpointable computers for AI agents), and Fly Managed Postgres. Apps are deployed and orchestrated primarily through the flyctl command-line tool, with private networking, autoscaling, zero-downtime deploys, and global routing across many regions.

What it's for

Deploying full-stack web applications globallyRunning coding agents (e.g. Claude, Codex) each in its own persistent Linux computerRunning personal AI agents with access to inbox/calendar that sleep until neededRunning MCP servers in isolated, persistent environments with egress policyExecuting untrusted code in hardware-isolated VMsHosting agent-built apps that go live with an HTTPS URL immediatelyMigrating apps from HerokuRunning managed Postgres databases

Features 21

Automatic checkpointing of Sprites
Automatic volume encryption
Autoscaling
CI/CD integration with deploy-only tokens
Docker/OCI container support
Fly Machines (fast-launching Firecracker VMs with REST API)
Fly Managed Postgres
Fly Sprites (persistent, checkpointable computers for AI agents)
flyctl command-line orchestration
Global deployment across many regions
Granular routing
Hardware isolation (no shared kernels/cores/memory)
Monitoring and health checks
Private networking with zero configuration
Prometheus metrics export
Sprite Block Device (persistent object-storage-backed disk, private beta)
Sprites Connectors for shared credentialed access to external services
SSO authentication and MFA
TLS via Let's Encrypt / Rustls
WireGuard-encrypted network traffic
Zero downtime deploys

At a glance

API

DeploymentCloud

Fordevelopers, AI agent builders, enterprises

CompanyFly.io · 2017

Integrations

PrometheusGrafanaUpstashLiteFSSlackOpenRouterGitHubGitLabGitHub ActionsTigris DataSupabase

Complianceself-reported

HIPAASOC2ISO 27001

Resources

Pricing

Core infrastructure is billed pay-as-you-go with exact per-unit rates not listed on the pricing page. Optional dedicated support starts at $29/month, a HIPAA compliance add-on is $99/month, prepaying for machine reservations gives 40% off, and enterprise workloads are quote-based via sales contact.

Pay-as-You-Go InfrastructureQuote

Billed on usage; specific per-unit rates not shown on the pricing page.

EnterpriseQuote

Quote-based; contact sales for larger workloads.

Get 40% off by making a machine reservation (pay up front). [raw type: other]