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Cloud · head to head

Caddy vs Confluent Cloud

Caddy logo

Caddy

Cloud

Web server with automatic HTTPS by default

From
Free
Free plan
Yes
Visit CaddyFull review
Confluent Cloud logo

Confluent Cloud

Cloud

The data streaming platform built on Apache Kafka, delivered as a fully managed cloud service

From
Free
Free plan
Yes
Visit Confluent CloudFull review

The short version

  • Confluent Cloud is a managed Apache Kafka service billed.
  • Caddy is free; Confluent Cloud starts at $385/mo.
  • Where Caddy falls short: smaller ecosystem than Nginx, so third-party guides and modules are fewer.
  • Where Confluent Cloud falls short: requires understanding of eCKU (Elastic Confluent Unit) billing.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Caddy and Confluent Cloud actually diverge.

Attributes where Caddy and Confluent Cloud differ
AttributeCaddyConfluent Cloud
Pricing modelOpen source, no licence feeUsage-based
PlatformsLinux, macOS, Windows, Self-hostedWeb

Identical on both: starting price (Free), free tier (Yes), 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 Caddy

  • Automatic HTTPS
  • Caddyfile
  • Reverse proxy
  • Single binary

Only in Confluent Cloud

Nothing recorded that Caddy does not also cover.

What people use each for

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

Caddy

  • Sites and services where expired certificates have caused outages beforenot Confluent Cloud
  • Small deployments where Nginx configuration is more effort than the problem warrantsnot Confluent Cloud
  • Reverse proxying internal services with TLS without a certificate workflownot Confluent Cloud

Confluent Cloud

  • Apache Kafka event streaming and processingnot Caddy
  • Real-time data pipeline architecturenot Caddy
  • Multi-cloud event broker deploymentnot Caddy
  • Stream processing and analyticsnot Caddy
  • Microservices data synchronizationnot Caddy

Where each one falls short

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

Caddy

  • Smaller ecosystem than Nginx, so third-party guides and modules are fewer
  • Adding plugins means rebuilding the binary rather than loading a module
  • Under very high throughput Nginx generally still benchmarks ahead
  • Automatic certificate issuance needs outbound internet access, which complicates air-gapped deployments

Confluent Cloud

  • Requires understanding of eCKU (Elastic Confluent Unit) billing
  • Data in/egress costs add $0.014-$0.050 per GB
  • Storage costs of $0.03-$0.08 per GB-month
  • Minimum commitment recommended for cost optimization

Pricing, plan by plan

Caddy

Free
  • CaddyFree
    • Full functionality
    • Commercial use permitted
    • Community support

Confluent Cloud

Free
  • BasicFree
    • Free first eCKU
    • Then $0.14 per eCKU-hour
    • 99.5% uptime
  • Standard$385/mo
    • $0.75 per eCKU-hour
    • 99.99% uptime with 2+ eCKUs
    • Infinite storage
  • Enterprise$895/mo
    • $1.75-$2.25 per eCKU-hour
    • Private networking
    • GBps+ scaling
  • Freight$2,300/mo
    • $2.25 per eCKU-hour
    • Specialty logging tier
    • Highest throughput requirements

Which should you pick?

Choose Caddy if

  • You need automatic https.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Self-hosted.
  • You also want caddyfile.
Caddy review

Choose Confluent Cloud if

  • You want to start without paying.
Confluent Cloud review

Questions people ask

Is Caddy or Confluent Cloud better?
Neither clearly leads. Caddy starts at Free and Confluent Cloud at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Caddy or Confluent Cloud?
Caddy starts at Free and Confluent Cloud at Free.
Does Caddy or Confluent Cloud run on more platforms?
Caddy runs on Linux, macOS, Windows, Self-hosted. Confluent Cloud runs on Web.
Can I use Caddy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Caddy best used for?
Caddy is most often used for sites and services where expired certificates have caused outages before, small deployments where nginx configuration is more effort than the problem warrants, reverse proxying internal services with tls without a certificate workflow. Of those, sites and services where expired certificates have caused outages before and small deployments where nginx configuration is more effort than the problem warrants are not what Confluent Cloud is typically brought in for.
What can Caddy do that Confluent Cloud cannot?
Caddy covers Automatic HTTPS, Caddyfile, Reverse proxy, Single binary.

Answered from the vendors’ own pages

Caddy: Is Caddy free?

Yes, open source under the Apache 2.0 licence, free for commercial use.

Confluent Cloud: How much does Confluent Cloud cost?

Confluent Cloud pricing starts free on Basic tier with $0.14 per eCKU-hour, Standard at $0.75 per eCKU-hour (~$385/month base), Enterprise at $1.75-$2.25 per eCKU-hour (~$895/month base), and Freight specialty tier at $2.25 per eCKU-hour (~$2300/month).

Source
Caddy: What does automatic HTTPS mean?

Caddy obtains certificates from Let’s Encrypt or ZeroSSL on first request and renews them before expiry, with no cron job or configuration.

Confluent Cloud: Is there a free tier for Confluent Cloud?

Yes, the Basic tier is free with one eCKU credit included. Additional usage is billed at $0.14 per eCKU-hour, plus data transfer and storage fees apply.

Source
Caddy: Caddy or Nginx?

Caddy is dramatically simpler to configure and removes certificate management. Nginx has the larger ecosystem and better peak throughput.

Confluent Cloud: What additional fees does Confluent Cloud charge?

Beyond eCKU hours, Confluent charges data in/egress at $0.014-$0.050 per GB and storage at $0.03-$0.08 per GB-month. Costs vary by tier and region.

Source
Confluent Cloud: Does Confluent offer discounts for higher usage?

Yes, volume discounts are negotiated upfront based on annual consumption estimates. Annual commitments allow flexible cross-product allocation with guaranteed cost savings.

Source
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