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Developer Tools · head to head

Deep Code vs Fly.io

Deep Code logo

Deep Code

Developer Tools

Desktop AI coding assistant that runs on DeepSeek models

From
Free
Free plan
Yes
Full reviewWebsite
Fly.io logo

Fly.io

Cloud

Deploy web applications globally

From
$29/month
Free plan
No
Full reviewWebsite

The short version

  • Only Deep Code has a free tier, so it costs nothing to try first.
  • Each has a real cost: Deep Code model choice is narrow. Bring your own key covers DeepSeek-V4-Pro and Flash plus the GLM and Mimo coding plans, and no frontier model from OpenAI, Anthropic or Google.; 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: Deep Code covers DeepSeek-backed agent, Fly.io covers Global deployment.
  • Prices and features above were last checked on 15 September 2026.

Where they differ

Only the attributes on which Deep Code and Fly.io actually diverge.

Attributes where Deep Code and Fly.io differ
AttributeDeep CodeFly.io
Starting priceFree$29/month
Pricing modelfreemiumusage-based
Free tierYesNo
PlatformsWindows, macOS, LinuxWeb, Api, Docker
CategoryDeveloper ToolsCloud
FoundedUnknown2020

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 Deep Code

  • DeepSeek-backed agent
  • Session management
  • File explorer
  • Snippets panel
  • Voice input
  • Bring your own key

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.

Deep Code

  • AI-assisted coding on a budgetnot Fly.io
  • Debugging and bug fixingnot Fly.io
  • Refactoring existing codenot Fly.io
  • Reusing prompt templates across projectsnot Fly.io
  • Using an existing DeepSeek API key without proxy setupnot Fly.io

Fly.io

  • Deploying containerised applications close to users across regionsnot Deep Code
  • Running full stack apps and databases on managed machinesnot Deep Code

Where each one falls short

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

Deep Code

  • Model choice is narrow. Bring your own key covers DeepSeek-V4-Pro and Flash plus the GLM and Mimo coding plans, and no frontier model from OpenAI, Anthropic or Google.
  • The Pro tier caps included usage at 100 Pro Credits per day rather than offering an unmetered plan.
  • Bring your own key is a paid feature, so the free tier cannot be pointed at your own DeepSeek account.
  • Desktop only, with no editor extension, web version or team seat management as of September 2026.
  • A small, young vendor with no independent review coverage yet, so there is nothing outside the vendor's own site to corroborate the cost claim.

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

Deep Code

Free
  • FreeFree
    • Session management
    • File explorer and snippets panel
    • Voice input
  • Pro$5/month
    • All Free features
    • 100 daily Pro Credits
    • BYOK across DeepSeek-V4-Pro, DeepSeek-V4-Flash, GLM Coding Plan and Mimo Coding 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

Which should you pick?

Choose Deep Code if

  • You need deepseek-backed agent.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want session management.
Deep Code review

Choose Fly.io if

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

Questions people ask

Is Deep Code or Fly.io better?
Neither clearly leads. Deep Code 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, Deep Code or Fly.io?
Deep Code has a free tier; the other does not. Paid plans start at Free for Deep Code and $29/month for Fly.io.
Does Deep Code or Fly.io run on more platforms?
Deep Code runs on Windows, macOS, Linux. Fly.io runs on Web, Api, Docker.
Can I use Deep Code for free?
Yes. Deep Code has a free tier, so you can try it without paying. Fly.io starts at $29/month.
What is Deep Code best used for?
Deep Code is most often used for ai-assisted coding on a budget, debugging and bug fixing, refactoring existing code, reusing prompt templates across projects. Of those, ai-assisted coding on a budget and debugging and bug fixing are not what Fly.io is typically brought in for.
What can Deep Code do that Fly.io cannot?
Deep Code covers DeepSeek-backed agent, Session management, File explorer, Snippets panel. Fly.io covers Global deployment, Docker support, Postgres databases, Redis support.

Answered from the vendors’ own pages

Deep Code: Which models does Deep Code run on?

DeepSeek V4 family models, with the vendor's headline built around DeepSeek V4.1. The free tier's included credits run on DeepSeek-V4-Flash. Paid users bringing their own key can also use DeepSeek-V4-Pro, the GLM Coding Plan and the Mimo Coding Plan.

Source
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
Deep Code: What does Deep Code cost?

There are two tiers. Free is $0 per month and includes session management, the file explorer, snippets, voice input and weekly free credits on DeepSeek-V4-Flash. Pro is $5 per month and adds 100 daily Pro Credits plus bring-your-own-key support for multiple models.

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
Deep Code: Do I need my own API key to use it?

No. The free tier includes weekly credits and needs no credit card, so the app works without a key. Bring your own key is available on the $5 per month Pro tier and covers DeepSeek-V4-Pro, DeepSeek-V4-Flash, the GLM Coding Plan and the Mimo Coding Plan.

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
Deep Code: Which operating systems does it run on?

Windows, macOS and Linux. It is a desktop application rather than an editor extension, so it runs alongside whatever editor you already use.

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
Deep Code: Is the 95 percent cheaper claim independently verified?

No. It is the vendor's own figure, based on DeepSeek token pricing against frontier model pricing. Actual savings depend on which model you compare against and how much of your usage falls inside the included credits.

Source
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