Fly.io
About Fly.io
Fly.io's platform includes isolated sandboxes for running untrusted or AI-generated code. It offers local NVMe storage and global durable object storage. Managed databases and custom datastores can be run on the platform.
Products
- Fly Machines: Hardware-virtualized containers that launch instantly and run only when needed.
Used for
- Deploying applications to production
- Running untrusted or AI-generated code
- Checkpointing environments and restoring them after failures
- Persisting state and scaling storage alongside sandboxes
- Deploying, scaling and debugging applications using agents
Who it is for
- Single developers and small teams.
From Fly.io's own website, read 2026-10-23. How we build listings.
How to evaluate Serverless & Edge Computing
This is how the CIOPages Research Team evaluates this category. It is not an assessment of Fly.io. It comes from our Serverless & Function-as-a-Service (FaaS) buyer guide.
25%
Workload Fit & Execution Limits
Max execution duration, memory and payload ceilings, concurrency model and account limits, support for long-running and stateful work (Durable Functions, Durable Objects), and whether your traffic is bursty enough to suit FaaS or steady enough to favor a container
20%
Cold-Start & Latency Behavior
Cold-start profile by runtime (V8 isolate, Wasm, container, JVM), mitigations such as SnapStart, provisioned/always-ready instances, and scale-to-zero startup time, plus regional versus edge placement for user-facing paths
20%
Event Model & Lock-In / Portability
Breadth of native event sources and triggers, depth of managed-service bindings, how proprietary the function packaging is, and the realistic exit path — portable containers or WebAssembly versus a provider-specific event fabric you would have to rewrite
15%
Integration & Ecosystem Depth
First-class ties to the surrounding cloud (IAM, queues, streams, databases, API gateway), orchestration and workflow tooling, language and runtime coverage, and the maturity of IaC and CI/CD support
10%
Observability & Operations
Distributed tracing across functions and event sources, structured logging and metrics, local emulation and testability, deployment and rollback model, and how hard it is to debug a failure that spans several triggers
10%
Security, Compliance & Cost Model
Per-function least-privilege IAM, network isolation (VPC/private networking), secrets handling, SOC 2 / ISO 27001 / regional residency, and whether the billing unit (per-invocation, GB-second, CPU-time, per-request) matches your traffic shape
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Quick Facts
fly.io Pricing pageCategoryCloud Infrastructure
SubcategoryServerless & Edge Computing
PricingUsage-based
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