Softwr

Cloud · head to head

Fly.io vs SolidStart

Fly.io logo

Fly.io

Cloud

Deploy web applications globally

From
$29/month
Rated
-
Full reviewWebsite
SolidStart logo

SolidStart

Web Development

Full-stack meta-framework for SolidJS with fine-grained reactivity

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only SolidStart 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; SolidStart smaller ecosystem compared to Next.js or Remix due to relative newness
  • They diverge on capability: Fly.io covers Global deployment, SolidStart covers Fine-grained reactivity.

Where they differ

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

Attributes where Fly.io and SolidStart differ
AttributeFly.ioSolidStart
Starting price$29/monthFree
Pricing modelusage-basedopen-source
Free tierNoYes
PlatformsWeb, Api, DockerWeb
CategoryCloudWeb Development
Founded2020Unknown

Identical on both: user rating (Not yet rated).

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 SolidStart

  • Fine-grained reactivity
  • Server actions
  • Single-flight mutations
  • Request deduplication
  • Multi-router support
  • Automatic API generation
  • Vite integration

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

SolidStart

  • Building lightweight full-stack applications with minimal runtime overheadnot Fly.io
  • Projects requiring fine-grained reactivity and automatic dependency trackingnot Fly.io
  • Applications targeting multiple deployment platforms with single codebasenot Fly.io
  • Teams prioritizing performance and small bundle sizesnot 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

SolidStart

  • Smaller ecosystem compared to Next.js or Remix due to relative newness
  • SolidJS less familiar to developers with React experience
  • Community documentation not as extensive as larger frameworks
  • Limited third-party UI component libraries compared to React 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

SolidStart

Free

No published plan breakdown. See the SolidStart review.

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 SolidStart if

  • You need fine-grained reactivity.
  • You want to start without paying.
  • You also want server actions.
SolidStart review

Questions people ask

Is Fly.io or SolidStart better?
Neither clearly leads. Fly.io starts at $29/month and SolidStart at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fly.io or SolidStart?
SolidStart has a free tier; the other does not. Paid plans start at $29/month for Fly.io and Free for SolidStart.
Does Fly.io or SolidStart run on more platforms?
Fly.io runs on Web, Api, Docker. SolidStart runs on Web.
Can I use SolidStart for free?
Yes. SolidStart 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 SolidStart is typically brought in for.
What can Fly.io do that SolidStart cannot?
Fly.io covers Global deployment, Docker support, Postgres databases, Redis support. SolidStart covers Fine-grained reactivity, Server actions, Single-flight mutations, Request deduplication.

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
SolidStart: What is SolidJS and how does it differ from React?

SolidJS uses fine-grained reactivity and automatic dependency tracking instead of React's virtual DOM, resulting in smaller bundles and better performance.

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
SolidStart: How many deployment platforms does SolidStart support?

SolidStart supports over 20 deployment platforms including Cloudflare, Netlify, Vercel, Deno, AWS, and Azure through Vite plugins.

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
SolidStart: Can I use TanStack Router with SolidStart?

Yes, SolidStart supports using either the official Solid Router or TanStack Router depending on project requirements.

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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