Fly.io
fly.ioBuild Difficulty: 4/5
A few focused days to build a solid replacement
Deploy app servers close to your users
How to Replace Fly.ioOverview
Features
31 features across 13 categories
Account Management(2)
Waived or refunded unintended charges for paid support customers
Create and manage unlimited organizations
Billing(3)
Aggregated billing across multiple organizations
Pay up front and save 40% with machine reservations
Pay only for actual CPU and memory consumption, down to the second
Compliance(2)
HIPAA-compliant workloads with BAAs and SOC2 certifications
SOC2 Type 2 attested infrastructure for enterprise compliance
Compute(5)
Checkpoint entire environments, run anything, and restore if something breaks
Hardware-virtualized containers that launch instantly and run only when needed
Support for GPU workloads
Get persistent brains when needed or ephemeral workers when not required
Fork off VMs like they're processes with instant startup
Database(1)
Run clustered databases like Cockroach, globally-distributed Postgres, and modern RPC systems like Elixir FLAME
Deployment(1)
Deploy in 18 regions from Sydney to São Paulo with sub-100ms response times
DevOps(1)
Built-in CI/CD integration for seamless deployment
Developer Experience(4)
CLI generates containers for most popular frameworks without requiring a Dockerfile
Command-line interface for orchestration from terminal with unlimited users per organization
Build with favorite frameworks including Rails, Phoenix, Django, Node, Laravel, and .NET
Tool to estimate personalized costs based on expected usage
Networking(1)
Private networks per sandbox, granular routing, and end-to-end encryption — all automatic
Scalability(1)
Run agents that scale to millions of users with dedicated CPU, memory, networking, and private filesystem per instance
Security(5)
Access control lists and narrowly scoped tokens for security
Applications run on KVM hardware-isolated infrastructure
Built on a memory-safe stack using Rust and Go
Hardware-isolated sandboxes for running AI-generated code and untrusted code in complete safety with self-contained environments ready in under a second
SSO authentication for enterprise users
Storage(4)
Snapshot environments and persist state alongside sandboxes
Fast local NVMe for low-latency work
Global, durable object storage for data that needs to persist
Scale storage right alongside sandboxes
Support(1)
Access to dedicated team of engineers with guaranteed support response times
Pricing
Pay-as-You-Go
- ✓Micro VMs
- ✓Persistent storage
- ✓Per-second billing
- ✓Global deployment
- ✓Private networking
Serious Support
- ✓Dedicated engineer support
- ✓Guaranteed response times
- ✓All pay-as-you-go features
Machine Reservations
- ✓Pay up front discount
- ✓Reserved compute capacity
HIPAA Compliance
- ✓HIPAA-compliant workloads
- ✓Business Associate Agreements
- ✓SOC2 Type 2 certification
Enterprise
- ✓Custom resource configurations
- ✓SLA requirements
- ✓Emergency support
- ✓Larger workloads
Cost Calculator
Keep Paying Fly.io
Build It Yourself
Total Cost Comparison
DIY hosting estimate based on Vercel + Supabase free/pro tiers (~$20/mo). Build time estimated from 31 features at easy complexity.
Build vs Buy
Should you build a Fly.io alternative or buy the subscription? Estimate based on 31 features.
Buy Fly.io
Better ValueBuild Your Own
Buying Fly.io saves ~$26,520 over 3 years vs building.
Estimates based on 31 features and a BuildScore of 4/5. Actual costs vary.
Integrations
12 known integrations