Cloud · head to head
Coolify vs Fly.io
Coolify
Cloud
Open source self-hosted platform that deploys applications and databases to servers you already own
- From
- Free
- Rated
- -
The short version
- Only Coolify has a free tier, so it costs nothing to try first.
- Each has a real cost: Coolify commit history since June 2026 shows one maintainer at 73 commits and a second at 15 with nobody else above one, and the same two people also ship four other coolLabs products, so the project depends on a very small number of individuals.; 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: Coolify covers Git push deployments, Fly.io covers Global deployment.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Coolify and Fly.io 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 Coolify
- Git push deployments
- One-click services
- Automatic certificates
- Managed databases
- Docker Compose support
- Notifications
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.
Coolify
- Replacing a managed platform bill with a single Hetzner or DigitalOcean instance running a dozen small applicationsnot Fly.io
- An agency hosting many low-traffic client sites on shared servers with certificates handled automaticallynot Fly.io
- Self-hosting analytics, databases and internal tools from the one-click catalogue without writing Compose filesnot Fly.io
- Deploying inside a country or jurisdiction where no managed platform operates a regionnot Fly.io
Fly.io
- Deploying containerised applications close to users across regionsnot Coolify
- Running full stack apps and databases on managed machinesnot Coolify
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Coolify
- Commit history since June 2026 shows one maintainer at 73 commits and a second at 15 with nobody else above one, and the same two people also ship four other coolLabs products, so the project depends on a very small number of individuals.
- Multi-server support is documented as experimental, load balancer configuration is manual, every server must share the same CPU architecture, and moving images between hosts requires you to run your own Docker registry.
- In self-hosted mode the Coolify machine holds every SSH key and secret with no documented high availability, so the dashboard host is a single point of failure that the paid Cloud tier fixes and self-hosting does not.
- Scheduled S3 backups cover PostgreSQL, MySQL, MariaDB and MongoDB only, so application persistent volumes are your responsibility and a restore is untested unless you test it yourself.
- Release cadence is fast enough that six patch versions shipped inside ten days in August 2026 against several hundred open issues, and because instances can update themselves a regression can reach a production host before you have read the changelog.
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
Coolify
Free- Self-hostedFree
- Apache-2.0, no features held back
- Unlimited servers, applications and users
- You run, update and back up the dashboard yourself
- Cloud$5/month
- Connects 2 servers, then 3 US dollars a month per extra server
- Managed and updated Coolify dashboard with high availability
- Managed backups of the Coolify instance itself
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 Coolify if
- You need git push deployments.
- You want to start without paying.
- You work on Web, Linux, Docker, Self-hosted.
- You also want one-click services.
Choose Fly.io if
- You need global deployment.
- You work on Web, Api, Docker.
- You also want docker support.
Questions people ask
- Is Coolify or Fly.io better?
- Neither clearly leads. Coolify 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, Coolify or Fly.io?
- Coolify has a free tier; the other does not. Paid plans start at Free for Coolify and $29/month for Fly.io.
- Does Coolify or Fly.io run on more platforms?
- Coolify runs on Web, Linux, Docker, Self-hosted. Fly.io runs on Web, Api, Docker.
- Can I use Coolify for free?
- Yes. Coolify has a free tier, so you can try it without paying. Fly.io starts at $29/month.
- What is Coolify best used for?
- Coolify is most often used for replacing a managed platform bill with a single hetzner or digitalocean instance running a dozen small applications, an agency hosting many low-traffic client sites on shared servers with certificates handled automatically, self-hosting analytics, databases and internal tools from the one-click catalogue without writing compose files, deploying inside a country or jurisdiction where no managed platform operates a region. Of those, replacing a managed platform bill with a single hetzner or digitalocean instance running a dozen small applications and an agency hosting many low-traffic client sites on shared servers with certificates handled automatically are not what Fly.io is typically brought in for.
- What can Coolify do that Fly.io cannot?
- Coolify covers Git push deployments, One-click services, Automatic certificates, Managed databases. Fly.io covers Global deployment, Docker support, Postgres databases, Redis support.
Answered from the vendors’ own pages
Coolify: Is anything held back for the paid tier?
No. Coolify Cloud hosts, updates and backs up the dashboard and gives it high availability. Every feature that touches your applications is in the Apache-2.0 build you can run yourself.
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.
SourceCoolify: What does Coolify Cloud cost?
Five US dollars a month connects two servers, and each additional server is three dollars a month, with 20 per cent off for annual billing. You still supply and pay for the servers themselves.
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.
SourceCoolify: Does it back up my application data?
It backs up PostgreSQL, MySQL, MariaDB and MongoDB to S3 on a schedule. Application persistent volumes are not covered, so anything stored outside a managed database needs your own backup plan.
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.
SourceCoolify: Can I run it across several servers?
Yes, but the documentation calls multi-server experimental. Load balancing is not configured for you, all nodes must share a CPU architecture, and you need to run your own Docker registry.
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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