Is Buildah or Fly.io better?

Neither clearly leads. Buildah starts at Free and Fly.io at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Buildah or Fly.io?

Buildah has a free tier; the other does not. Paid plans start at Free for Buildah and $29/month for Fly.io.

Does Buildah or Fly.io run on more platforms?

Buildah runs on Linux. Fly.io runs on Web, Api, Docker.

Can I use Buildah for free?

Yes. Buildah has a free tier, so you can try it without paying. Fly.io starts at $29/month.

What is Buildah best used for?

Buildah is most often used for building images in ci without a privileged docker daemon, producing minimal images with tighter layer control than a dockerfile gives, scripted image assembly where a dockerfile is the wrong abstraction. Of those, building images in ci without a privileged docker daemon and producing minimal images with tighter layer control than a dockerfile gives are not what Fly.io is typically brought in for.

What can Buildah do that Fly.io cannot?

Buildah covers Daemonless builds, Rootless, Dockerfile compatible, Scriptable builds. Fly.io covers Global deployment, Docker support, Postgres databases, Redis support.

Cloud · head to head

Buildah vs Fly.io

Buildah

Cloud

Build OCI container images without a daemon or a Dockerfile

From: Free
Rated: -

Full review Website

Fly.io

Cloud

Deploy web applications globally

From: $29/month
Rated: -

Full review Website

The short version

Only Buildah has a free tier, so it costs nothing to try first.
Each has a real cost: Buildah linux only, with no native macOS or Windows support; Fly.io egress is priced by destination region, from $0.02 per GB in North America and Europe to $0.12 per GB for Africa and India, so the same traffic costs six times more depending on where users are
They diverge on capability: Buildah covers Daemonless builds, Fly.io covers Global deployment.

Where they differ

Only the attributes on which Buildah and Fly.io actually diverge.

Attributes where Buildah and Fly.io differ
Attribute	Buildah	Fly.io
Starting price	Free	$29/month
Pricing model	Open source, no licence fee	usage-based
Free tier	Yes	No
Platforms	Linux	Web, Api, Docker
Founded	Unknown	2020

Identical on both: user rating (Not yet rated), category (Cloud).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Buildah

Daemonless builds
Rootless
Dockerfile compatible
Scriptable builds

Only in Fly.io

Global deployment
Docker support
Postgres databases
Redis support
Auto-scaling
Health checks
Backups
Monitoring

What people use each for

The jobs each tool is most often brought in to do.

Buildah

Building images in CI without a privileged Docker daemonnot Fly.io
Producing minimal images with tighter layer control than a Dockerfile givesnot Fly.io
Scripted image assembly where a Dockerfile is the wrong abstractionnot Fly.io

Fly.io

Deploying containerised applications close to users across regionsnot Buildah
Running full stack apps and databases on managed machinesnot Buildah

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Buildah

Linux only, with no native macOS or Windows support
Scriptable builds are powerful but less portable and less familiar than a Dockerfile
Narrow by design: it builds images and does not run them, so it needs Podman or another runtime alongside

Fly.io

Egress is priced by destination region, from $0.02 per GB in North America and Europe to $0.12 per GB for Africa and India, so the same traffic costs six times more depending on where users are
Stopped machines still bill at $0.15 per GB of root filesystem a month, so a paused service is not a free one
Volumes are billed on provisioned capacity rather than usage, at $0.15 per GB a month
Reservation discounts of 40% require paying a year up front, from $36 to $1,440
Fly Kubernetes is a separate $75 a month per cluster
Dedicated IPv4 addresses are $2 a month each

Pricing, plan by plan

Buildah

Free

BuildahFree
- Full functionality
- No usage limits
- Community support

Fly.io

$29/month

Pay-as-You-Go$null/mo
- Micro VMs and persistent storage charged by usage
- FlyCTL CLI
- Unlimited users and organizations
Serious Support$29/month
- Access to dedicated engineering team
- All Pay-as-You-Go features
Machine Reservation Blocks$null/mo
- 40% discount on machine usage
- Requires upfront payment for savings
Compliance Package$99/month
- HIPAA compliance
- BAAs
- SOC2 documentation

Which should you pick?

Choose Buildah if

You need daemonless builds.
You want to start without paying.
You work on Linux.
You also want rootless.

Buildah review

Choose Fly.io if

You need global deployment.
You work on Web, Api, Docker.
You also want docker support.

Fly.io review

Questions people ask

Is Buildah or Fly.io better?: Neither clearly leads. Buildah starts at Free and Fly.io at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Buildah or Fly.io?: Buildah has a free tier; the other does not. Paid plans start at Free for Buildah and $29/month for Fly.io.
Does Buildah or Fly.io run on more platforms?: Buildah runs on Linux. Fly.io runs on Web, Api, Docker.
Can I use Buildah for free?: Yes. Buildah has a free tier, so you can try it without paying. Fly.io starts at $29/month.
What is Buildah best used for?: Buildah is most often used for building images in ci without a privileged docker daemon, producing minimal images with tighter layer control than a dockerfile gives, scripted image assembly where a dockerfile is the wrong abstraction. Of those, building images in ci without a privileged docker daemon and producing minimal images with tighter layer control than a dockerfile gives are not what Fly.io is typically brought in for.
What can Buildah do that Fly.io cannot?: Buildah covers Daemonless builds, Rootless, Dockerfile compatible, Scriptable builds. Fly.io covers Global deployment, Docker support, Postgres databases, Redis support.

Answered from the vendors’ own pages

Buildah: Is Buildah free?

Yes, open source with no licence fee.

Fly.io: Is there a free tier for Fly.io?

Fly.io does not advertise a free tier. The base plan is pay-as-you-go with usage-based pricing for Micro VMs and persistent storage. All users get FlyCTL CLI, unlimited organizations, private networking, SSO, ACLs, and scoped tokens.

Source

Buildah: Do I still need a Dockerfile?

No. Buildah reads Dockerfiles if you have them, but images can be built entirely from shell commands instead.

Fly.io: How much does Fly.io Serious Support cost?

Serious Support costs 29 USD per month and provides access to a dedicated engineering team while maintaining all pay-as-you-go features for Micro VMs and storage.

Source

Buildah: How is Buildah different from Podman?

Buildah builds images; Podman runs them. Podman actually embeds Buildah for its build command, and the two are designed to be used together.

Fly.io: What does Fly.io Compliance Package include?

The Compliance Package is 99 USD per month and includes HIPAA compliance, BAAs, and SOC2 documentation for organizations requiring compliance certifications.

Source

Fly.io: Does Fly.io offer discounts for upfront commitment?

Yes, Fly.io offers Machine Reservation Blocks with 40% discount on machine usage. This requires upfront payment but applies savings on infrastructure costs.

Source

Buildah vs Fly.io

Buildah

Fly.io

The short version

Where they differ

What each one covers

Only in Buildah

Only in Fly.io

What people use each for

Buildah

Fly.io

Where each one falls short

Buildah

Fly.io

Pricing, plan by plan

Buildah

Fly.io

Which should you pick?

Choose Buildah if

Choose Fly.io if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Buildah

More on Fly.io

Keep looking

Other head to heads