Softwr

Cloud · head to head

Fly.io vs Heroku

Fly.io logo

Fly.io

Cloud

Deploy web applications globally

From
$29/month
Rated
-
Full reviewWebsite
Heroku logo

Heroku

Cloud

Cloud Application Platform

From
$5/month
Rated
-
Full reviewWebsite

The short version

  • 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; Heroku there is no free dyno tier; the cheapest Eco dyno is $5 per month
  • They diverge on capability: Fly.io covers Global deployment, Heroku covers Git-based deployment.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Fly.io and Heroku differ
AttributeFly.ioHeroku
Starting price$29/month$5/month
Pricing modelusage-basedsubscription
PlatformsWeb, Api, DockerWeb, Api, Workers
Founded20202007

Identical on both: free tier (No), 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 Heroku

  • Git-based deployment
  • Buildpacks
  • Dynos (containers)
  • Add-ons marketplace
  • Postgres database
  • Environment variables
  • Logging
  • API

Both cover

  • GitHub
  • HTTPS
  • Cloud deployment
  • Web support
  • Api support

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 Heroku
  • Running full stack apps and databases on managed machinesnot Heroku

Heroku

  • Application hostingnot Fly.io
  • Database as a servicenot Fly.io
  • CI/CD pipelinesnot Fly.io
  • API deploymentnot 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

Heroku

  • There is no free dyno tier; the cheapest Eco dyno is $5 per month
  • Eco dynos sleep after 30 minutes of inactivity, are restricted to personal accounts and allow only 2 process types
  • Free SSL and 10 process types start at the Basic dyno at $7 per month
  • Private and Shield dyno types require a Private Space, which is billed on top of the dynos
  • Private Space dynos start at $250 per month for Private-M and $500 per month for Private-L
  • Dyno prices are per dyno per month, so an app with several process types multiplies the bill

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

Heroku

$5/month
  • Eco Dyno$5/month
    • 0.5 GB RAM
    • Git/Docker deploy
    • Custom domains
  • Basic Dyno$7/month
    • 0.5 GB RAM
    • Always-on
    • Free SSL
  • Standard-1X Dyno$25/month
    • 0.5 GB RAM
    • Horizontal scaling
    • App metrics
  • Standard-2X Dyno$50/month
    • 1 GB RAM
    • Horizontal scaling
    • App metrics

Which should you pick?

Choose Fly.io if

  • You need global deployment.
  • You work on Web, Api, Docker.
  • You also want docker support.
Fly.io review

Choose Heroku if

  • You need git-based deployment.
  • You work on Web, Api, Workers.
  • You also want buildpacks.
Heroku review

Questions people ask

Is Fly.io or Heroku better?
Neither clearly leads. Fly.io starts at $29/month and Heroku at $5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fly.io or Heroku?
Fly.io starts at $29/month and Heroku at $5/month.
Does Fly.io or Heroku run on more platforms?
Fly.io runs on Web, Api, Docker. Heroku runs on Web, Api, Workers.
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 Heroku is typically brought in for.
What can Fly.io do that Heroku cannot?
Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. Heroku covers Git-based deployment, Buildpacks, Dynos (containers), Add-ons marketplace. Both handle GitHub, HTTPS, Cloud deployment, Web support.

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.

Source
Heroku: How much does Heroku cost?

Heroku dyno pricing starts at $5 per month USD for the Eco tier (with 30-minute inactivity sleep), $7 per month for Basic (always-on), and scales up to $1,500 per month for Performance-2XL with 126 GB RAM.

Source
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
Heroku: What is the cheapest always-on Heroku plan?

The Basic Dyno at $7 per month USD is Heroku's cheapest always-on container option. It provides 0.5 GB RAM, free SSL, and support for 10 process types.

Source
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
Heroku: How is Heroku Postgres priced?

Heroku Postgres Essential tier (shared resources) starts at $5-$20 per month for 1-32 GB disk. Standard tier (dedicated) ranges $50-$12,000 per month. Premium, Private, Shield, and Advanced tiers offer higher performance at corresponding prices.

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
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