Cloud · head to head
Fly.io vs Skopeo

Skopeo
Cloud
Inspect, copy and sign container images without pulling them
- From
- Free
- Rated
- -
The short version
- Only Skopeo has a free tier, so it costs nothing to try first.
- Each has a real cost: 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; Skopeo single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
- They diverge on capability: Fly.io covers Global deployment, Skopeo covers Remote inspection.
Where they differ
Only the attributes on which Fly.io and Skopeo actually diverge.
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 Fly.io
- Global deployment
- Docker support
- Postgres databases
- Redis support
- Auto-scaling
- Health checks
- Backups
- Monitoring
Only in Skopeo
- Remote inspection
- Registry-to-registry copy
- Format conversion
- Image signing
What people use each for
The jobs each tool is most often brought in to do.
Fly.io
- Deploying containerised applications close to users across regionsnot Skopeo
- Running full stack apps and databases on managed machinesnot Skopeo
Skopeo
- Promoting images between staging and production registries without a round tripnot Fly.io
- Inspecting an image’s contents before deciding to deploy itnot Fly.io
- Mirroring images into an air-gapped or internal registrynot Fly.io
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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
Skopeo
- Single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
- Command syntax with transport prefixes such as docker:// is unusual and trips people up initially
- Documentation is sparse compared with the rest of the container ecosystem
Pricing, plan by plan
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
Skopeo
Free- SkopeoFree
- Full functionality
- No usage limits
- Community support
Which should you pick?
Choose Fly.io if
- You need global deployment.
- You work on Web, Api, Docker.
- You also want docker support.
Choose Skopeo if
- You need remote inspection.
- You want to start without paying.
- You work on Linux, macOS.
- You also want registry-to-registry copy.
Questions people ask
- Is Fly.io or Skopeo better?
- Neither clearly leads. Fly.io starts at $29/month and Skopeo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Fly.io or Skopeo?
- Skopeo has a free tier; the other does not. Paid plans start at $29/month for Fly.io and Free for Skopeo.
- Does Fly.io or Skopeo run on more platforms?
- Fly.io runs on Web, Api, Docker. Skopeo runs on Linux, macOS.
- Can I use Skopeo for free?
- Yes. Skopeo has a free tier, so you can try it without paying. Fly.io starts at $29/month.
- What is Fly.io best used for?
- Fly.io is most often used for deploying containerised applications close to users across regions, running full stack apps and databases on managed machines. Of those, deploying containerised applications close to users across regions and running full stack apps and databases on managed machines are not what Skopeo is typically brought in for.
- What can Fly.io do that Skopeo cannot?
- Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. Skopeo covers Remote inspection, Registry-to-registry copy, Format conversion, Image signing.
Answered from the vendors’ own pages
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.
SourceSkopeo: Is Skopeo free?
Yes, open source with no licence fee.
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.
SourceSkopeo: Why copy images without pulling them?
A registry-to-registry copy avoids downloading and re-uploading gigabytes, which is faster and much cheaper on bandwidth in CI.
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.
SourceSkopeo: Can Skopeo run containers?
No. It only inspects, copies, signs and deletes images. Running them is Podman’s or Docker’s job.
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.
SourceRelated pages
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