Fly.io vs Datadog
Both sit in developer tools. Here is how they differ on the things you can actually check.
On price: Fly.io starts $6.06 a month cheaper than Datadog ($1.94 against $8, 76% less) on its shared-cpu-1x · 256MB tier. Both figures were read from the vendors' own pricing pages on the dates shown below.
Fly.io
fly.io
Runs containers on hardware in many regions, close to users. Now led by Sprites — hardware-isolated Linux VMs built for AI agents, with checkpointing and persistent filesystems — alongside the original app hosting, volumes and managed Postgres.
Datadog
datadoghq.com
Infrastructure metrics, APM, logs, synthetics and security monitoring in one platform. Powerful, and famously easy to overspend on.
| Fly.io | Datadog | |
|---|---|---|
| Entry price | $1.94/mo | $8/mo |
| Entry plan | shared-cpu-1x · 256MB | Code Coverage |
| Paid annually | — | $8/mo |
| Price checked | 21 Sept 2026 | 25 Sept 2026 |
| Pricing model | Paid | Free trial |
| Free plan | No | Yes |
| Category | Developer Tools | Developer Tools |
| Around since | 2017 | 2010 |
Every price here was read from the vendor's own pricing page, most recently on 25 Sept 2026. Entry tier only — vendors change pricing without notice.
Fly.io vs Datadog, answered
- Is Fly.io cheaper than Datadog?
- Yes. Fly.io starts at $1.94 a month against Datadog's $8, 76% less.
- Do Fly.io or Datadog have a free plan?
- Datadog publishes an ongoing free plan; Fly.io does not.
- What is the difference between Fly.io and Datadog?
- Fly.io: Runs containers on hardware in many regions, close to users. Now led by Sprites — hardware-isolated Linux VMs built for AI agents, with checkpointing and persistent filesystems — alongside the original app hosting, volumes and managed Postgres. Datadog: Infrastructure metrics, APM, logs, synthetics and security monitoring in one platform. Powerful, and famously easy to overspend on.
