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Cloud · head to head

Flux vs Koyeb

Flux logo

Flux

Cloud

GitOps continuous delivery for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Koyeb logo

Koyeb

Cloud

High-performance serverless infrastructure for APIs, inference, and databases

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only Flux has a free tier, so it costs nothing to try first.
  • Each has a real cost: Flux no user interface of its own: observing what Flux is doing means CLI or a third-party dashboard; Koyeb pricing starts at $29/month with additional compute costs
  • They diverge on capability: Flux covers Git as source of truth, Koyeb covers Serverless containers.

Where they differ

Only the attributes on which Flux and Koyeb actually diverge.

Attributes where Flux and Koyeb differ
AttributeFluxKoyeb
Starting priceFree$29/month
Pricing modelOpen source, no licence feeUnknown
Free tierYesNo
PlatformsKubernetes, LinuxWeb, CLI, API

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 Flux

  • Git as source of truth
  • Pull-based delivery
  • Helm and Kustomize support
  • Automated image updates

Only in Koyeb

  • Serverless containers
  • GPU support
  • Global distribution
  • Multi-protocol support
  • Serverless Postgres
  • Zero-downtime deployments

What people use each for

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

Flux

  • Removing cluster credentials from CI systemsnot Koyeb
  • Keeping many clusters consistent with a single declared statenot Koyeb
  • Automatically correcting configuration drift rather than discovering it laternot Koyeb

Koyeb

  • Deploying AI inference models globally with GPU accelerationnot Flux
  • Building SaaS platforms with automatic scalingnot Flux
  • Running distributed AI agents and background workersnot Flux

Where each one falls short

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

Flux

  • No user interface of its own: observing what Flux is doing means CLI or a third-party dashboard
  • Debugging a stuck reconciliation is harder than reading a pipeline log, because failure is asynchronous
  • Everything must be in Git, which is awkward for secrets and needs a sealed-secrets or external-secrets approach
  • GitOps is a workflow change, not just a tool, and teams used to imperative deploys find the adjustment real

Koyeb

  • Pricing starts at $29/month with additional compute costs
  • GPU compute is expensive at $0.75-$2.50 per hour
  • Limited customization for infrastructure configuration

Pricing, plan by plan

Flux

Free
  • FluxFree
    • Full functionality
    • No usage limits
    • Community support

Koyeb

$29/month
  • Pro$29/month
    • $10 included compute
    • 10 users
    • 100 services
  • Scale$299/month
    • $100 included compute
    • 50 users
    • 1,000 services
  • Enterprise$1000/month
    • Unlimited users
    • Custom resources
    • SSO/RBAC

Which should you pick?

Choose Flux if

  • You need git as source of truth.
  • You want to start without paying.
  • You work on Kubernetes, Linux.
  • You also want pull-based delivery.
Flux review

Choose Koyeb if

  • You need serverless containers.
  • You work on Web, CLI, API.
  • You also want gpu support.
Koyeb review

Questions people ask

Is Flux or Koyeb better?
Neither clearly leads. Flux starts at Free and Koyeb at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flux or Koyeb?
Flux has a free tier; the other does not. Paid plans start at Free for Flux and $29/month for Koyeb.
Does Flux or Koyeb run on more platforms?
Flux runs on Kubernetes, Linux. Koyeb runs on Web, CLI, API.
Can I use Flux for free?
Yes. Flux has a free tier, so you can try it without paying. Koyeb starts at $29/month.
What is Flux best used for?
Flux is most often used for removing cluster credentials from ci systems, keeping many clusters consistent with a single declared state, automatically correcting configuration drift rather than discovering it later. Of those, removing cluster credentials from ci systems and keeping many clusters consistent with a single declared state are not what Koyeb is typically brought in for.
What can Flux do that Koyeb cannot?
Flux covers Git as source of truth, Pull-based delivery, Helm and Kustomize support, Automated image updates. Koyeb covers Serverless containers, GPU support, Global distribution, Multi-protocol support.

Answered from the vendors’ own pages

Flux: Is Flux free?

Yes, open source and CNCF-graduated.

Koyeb: What are Koyeb's subscription plans?

Pro plan is $29/month with $10 included compute, Scale plan is $299/month with $100 included compute and 99.9% SLA, and Enterprise starts at $1,000/month with unlimited users and 99.99% SLA.

Source
Flux: Flux or Argo CD?

Both implement GitOps. Argo CD ships a strong web UI and is often preferred for visibility; Flux is more modular and composes as controllers, which suits platform teams.

Koyeb: How much does GPU compute cost?

GPU pricing is per-second: RTX-A6000 costs $0.75/hour, A100 costs $1.60/hour, H100 costs $2.50/hour, and 8x H100 costs $20.00/hour.

Source
Flux: Why is pull-based safer?

Because the cluster reaches out to Git rather than CI reaching into the cluster. No external system needs write credentials to production.

Koyeb: What database options are available?

Koyeb offers serverless Postgres starting at free (0.25 vCPU, 1GB RAM) up to 3XL at $1.28/hour with 8 vCPU and 32GB RAM. Storage costs $0.50/month per GB.

Source
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