Sandbox
Fly.io
Persistent Linux Sprites for coding agents and tool execution.
Own model keyPlan dependent
Published plans1
Last checked2026-10-23
Source statusSources reviewed
The essentials
What Fly.io offers
Fly.io is listed here as sandbox infrastructure for AI agent workloads. Persistent Linux Sprites for coding agents and tool execution.
Pricing and deployment
No per-Sprite subscription; running compute, memory and storage are metered independently.
Choosing this service
Evaluate the execution model, persistence requirements and connected services before choosing a deployment. A platform base fee or compute rate is not a complete model-usage budget.
Specifications below distinguish documented features from information not disclosed in the reviewed sources. Official links and the review date are provided for checking current terms.
Subscription & usage
Choose a plan. Check the scope.
These plans can serve different access methods. Model usage and resource charges may be additional.
Sprites — metered Linux execution
SubscriptionUsage-based
Sprites: $0.0385/CPU-hour + $0.021875/GB-hour; storage extra.
Included
Persistent Linux Sprites for coding agents and tool execution.
Extra usage
Sprites CPU $0.0385/CPU-hour; memory $0.021875/GB-hour. Storage and other chargeable resources are additional.
Full conditions & limits
Pricing
- Pricing model
- Published
- Base subscription amount (not total cost)
- 0
- Currency
- USD
- Billing interval
- Usage only
- Subscription scope
- Sprites: $0.0385/CPU-hour + $0.021875/GB-hour; storage extra.
- Annual commitment / upfront payment
- No per-Sprite subscription; running compute, memory and storage are metered independently.
- Setup fee
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Included usage
- Persistent Linux Sprites for coding agents and tool execution.
- Overage rates
- Sprites CPU $0.0385/CPU-hour; memory $0.021875/GB-hour. Storage and other chargeable resources are additional.
- Model costs and BYOK conditions
- Model API usage and third-party tools are additional unless explicitly included by the selected offer.
- Free trial / credits / expiry
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Cancellation and refunds
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Tax treatment
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
Resources and limits
- CPU allocation and billing basis
- Metered CPU-hour
- RAM
- Metered GB-hour
- GPU / VRAM
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Storage and persistence
- Persistent ext4 filesystem, backed to durable object storage on idle; storage charges are separate.
- Network egress
- Network charges depend on service pricing
- Agent limit
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Concurrency
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Execution quota
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Maximum session / execution duration
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Request rate limit
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Continuous execution / idle behavior
- Sprites enter warm/cold idle states and wake on requests; idle compute is not charged. Storage remains separately priced.
- Retention
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
Plan controls
- Support
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Contractual SLA / availability target
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Plan-specific security and compliance
- Hardware-isolated microVM environment; credentials and application permissions require configuration.
- Eligibility and restrictions
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
Evidence
- Official pricing source
- Official source
- Last checked (UTC date)
- 2026-10-23
- Source interpretation and caveats
- Representative plan only, not the complete provider catalog. Prices are a dated reference; check official checkout for current regional terms.
1 fields not disclosed
Price effective date, if explicitly published
Under the hood
Explore the specifications
Open a category for the details. Capabilities may depend on the selected plan.
Company & deploymentService model, use cases and limitations
Company and service
- Official website
- Official source
- Pricing page
- Official source
- Documentation
- Official source
- Hosting category
- Sandbox
- Deployment model
- Managed platform; customer deploys and configures the agent workload.
- Best suited to
- Persistent Linux Sprites for coding agents and tool execution.
- Important limitations
- No per-Sprite subscription; running compute, memory and storage are metered independently.
Compatibility & toolsModels, memory, MCP and integrations
Compatibility and tools
- Frameworks / SDKs
- Linux-compatible coding agents and documented Sprite interfaces.
- Languages / runtimes
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Model compatibility
- Model availability and credentials depend on the selected framework and model provider.
- Bring your own model API key
- Conditional / plan dependent
- Memory and sessions
- Persistent ext4 filesystem and state between runs; application conversation-memory design remains customer-managed.
- MCP: client / server / hosting distinction
- Documented agent/tool integrations; distinguish MCP tools from hosting a managed MCP service.
- Schedules and triggers
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Browser execution
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Code execution / sandbox
- Execution facilities depend on the selected runtime and configured tools.
- App integrations / authentication
- Configure supported tools and provider credentials; third-party services can add charges.
Infrastructure & operationsRegions, scaling, networking and recovery
Infrastructure and operations
- Available deployment regions
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Scaling and idle behavior
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Git / deployment workflow
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Private network / static IP / egress controls
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Backups and recovery
- Filesystem preserved to durable object storage when idle and restored on wake.
- Logs, tracing, metrics and evaluations
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
Security & supportIsolation, access controls and support
Security and support
- Isolation model
- Hardware-isolated Linux microVM per Sprite.
- Secrets management
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- SSO / roles / audit logging
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Compliance evidence and scope
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
- Support channels
- Not disclosed in the reviewed official sources; confirm with the provider before purchase.
Evidence, not assumptions
Sources & verification
Reviewed 2026-10-23 UTC. “Not disclosed” means a value was not confirmed in these sources, not that a capability is unavailable.