Fly.io vs Microsoft Azure Comparison
Compare Fly.io vs Microsoft Azure features, pricing, and more.
Last updated: November 2026
Fly.io
5.9/10
Fly.io is a developer cloud that runs containerized apps as fast-booting Machines in regions worldwide, billed by usage, with managed Postgres and object storage.
Microsoft Azure
7.1/10
Microsoft's public cloud platform offering virtual machines, containers, serverless, databases, storage and AI services on pay-as-you-go pricing for businesses of all sizes.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 5.9/10 | 7.1/10 |
| Analytics | 5/10 | 8/10 |
| Cost | 7/10 | 4/10 |
| Customization | 8/10 | 9/10 |
| Ease of Use | 6/10 | 4/10 |
| Integration | 6/10 | 9/10 |
| Reliability | 4/10 | 8/10 |
| Scalability | 7/10 | 9/10 |
| Security | 6/10 | 9/10 |
| Support | 5/10 | 5/10 |
| Pricing | ||
| Free plan | No | Yes |
| Cheapest paid plan | $2/mo Pay-as-you-go (Machines) | Contact for pricing |
| Estimated cost for 10 users | $2/mo Pay-as-you-go (Machines) | Free Azure free account |
| Features | ||
| Cloud Compute | ||
| Managed Databases | ||
| Multiple Regions | ||
| Object Storage | ||
| API and CLI | Not listed | |
| Automatic Backups | Not listed | |
| Content Delivery Network | Not listed | |
| Free SSL Certificates | Not listed | |
| Managed Kubernetes | Not listed | |
| Serverless Functions | Not listed | |
| Shared Hosting | Not listed | |
| Uptime SLA | Not listed | |
| VPS Hosting | Not listed | |
Fly.io vs Microsoft Azure cost by team size
Microsoft Azure costs less at every team size we checked.
| Team size | Fly.io | Microsoft Azure |
|---|---|---|
| 1 user | $2/moPay-as-you-go (Machines) | FreeAzure free account |
| 5 users | $2/moPay-as-you-go (Machines) | FreeAzure free account |
| 10 users | $2/moPay-as-you-go (Machines) | FreeAzure free account |
| 25 users | $2/moPay-as-you-go (Machines) | FreeAzure free account |
| 50 users | $2/moPay-as-you-go (Machines) | FreeAzure free account |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose Fly.io
- Higher Cost score (7/10 vs 4/10)
- Higher Ease of Use score (6/10 vs 4/10)
- Better fit for developers (9/10 vs 7/10)
- Better fit for startups (8/10 vs 6/10)
Why choose Microsoft Azure
- Has a free plan (Fly.io does not)
- Lower estimated cost for 10 users: Free vs $2/mo
- Higher Reliability score (8/10 vs 4/10)
- Higher Analytics score (8/10 vs 5/10)
- Better fit for enterprise (9/10 vs 5/10)
Pros & Cons
Fly.io
Pros
- Very low entry cost: a small shared Machine is about $2.19 a month, and invoices under $5 are waived.
- Apps can run in many regions with Anycast routing and global load balancing included at no extra cost.
- Per-hour billing and one-year reserved blocks that save 40 percent give flexible ways to manage cost.
- Managed Postgres plans include high availability, automated backups and connection pooling.
- A HIPAA package with a pre-signed BAA costs $99 a month on any paid plan.
Cons
- Status trackers show recurring network and API incidents through 2025 and 2026, and the CEO admitted reliability problems in 2023.
- The 99.9% uptime SLA is available only with Enterprise support, which starts at $2,500 a month.
- Bills spread across Machines, volumes, egress, IPs and support, which makes costs harder to predict.
- Apps need a Dockerfile and a fly.toml, which adds setup work compared with buildpack-style PaaS products.
- Compute costs more in some regions, up to 1.615 times in Sao Paulo.
Microsoft Azure
Pros
- Free account includes a 200 USD credit plus always-free allowances such as 1 million Functions requests and Azure DevOps for 5 users.
- Close integration with Microsoft products such as Entra ID and Power BI is repeatedly praised by reviewers.
- Very broad catalogue covering compute, Kubernetes, serverless, databases, storage and AI services.
- Global footprint of over 400 datacenters across 70 regions as of fiscal 2025.
- Reviewers credit built-in identity management and security.
Cons
- Reviewers on Capterra and TrustRadius say monthly bills are hard to understand and predict.
- Steep learning curve, with many services carrying similar names.
- Some PeerSpot reviewers report support tickets taking weeks or months to resolve.
- Paid support is extra, from 29 to 1,000 USD per month beyond the free Basic plan.
- Integration with non-Microsoft platforms and documentation for new releases draw criticism.
Not sold on either?
Frequently Asked Questions
Microsoft Azure scores higher on our Hosting & Infrastructure criteria: 7.1/10 against 5.9/10 for Fly.io. The largest gap is in Reliability: 4/10 for Fly.io and 8/10 for Microsoft Azure.
Microsoft Azure costs less for 10 users: free on its Azure free account plan, against about $2/mo on its Pay-as-you-go (Machines) plan for Fly.io, billed monthly.
Microsoft Azure has a free plan; Fly.io does not list one.
Microsoft Azure is the better fit for enterprise: we rate it 9/10 for them, against 5/10 for Fly.io.
