Fly.io
LinearB
| Feature | Fly.io | LinearB |
|---|---|---|
| Pricing | Free / from $0/mo | Free / from $39/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.2 / 5 | 4.2 / 5 |
| Best For | full-stack-developers, global-apps, edge-computing, hobby-projects | engineering-managers, vp-engineering, ctos, devops-teams |
| Founded | 2017 | 2019 |
| Global Deployment | ✓ | ✗ |
| Firecracker Vms | ✓ | ✗ |
| Fly Postgres | ✓ | ✗ |
| Auto Scaling | ✓ | ✗ |
| Volumes | ✓ | ✗ |
| Private Networking | ✓ | ✗ |
| Gpu Support | ✓ | ✗ |
| Cycle Time Metrics | ✗ | ✓ |
| Dora Metrics | ✗ | ✓ |
| Pr Insights | ✗ | ✓ |
| Workflow Automation | ✗ | ✓ |
| Team Benchmarks | ✗ | ✓ |
| Planning Intelligence | ✗ | ✓ |
| Investment Profile | ✗ | ✓ |
✓ Fly.io Pros
- Deploy apps globally to 30+ regions easily
- Built-in Postgres and Redis for data at the edge
- Generous free tier for hobby projects
- Firecracker VMs start in milliseconds
✗ Fly.io Cons
- Operational complexity for simple apps
- Documentation can be hard to navigate
- Billing surprises if auto-scaling triggers unexpectedly
✓ LinearB Pros
- Correlates engineering metrics with business outcomes
- Automated workflow improvements (WorkerB)
- Benchmarks against industry standards
- Identifies bottlenecks in dev process
✗ LinearB Cons
- Expensive for large engineering teams
- Can feel like surveillance to developers
- Metrics can be gamed if not used carefully
The Verdict
Fly.io is built for full stack developers and global apps, with a focus on global-deployment and firecracker-vms. LinearB targets engineering managers and vp engineering and leads with cycle-time-metrics and dora-metrics.
On pricing, Fly.io is the clear winner for budget-conscious users — starting at $0/mo compared to $39/mo for LinearB. That $39/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.