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Developer Tools · head to head

Nix vs ProofHub

Nix logo

Nix

Developer Tools

Purely functional package manager and the NixOS distribution built on it, for byte-reproducible environments

From
Free
Free plan
Yes
Visit NixFull review
ProofHub logo

ProofHub

Project Management

All-in-one project management and team collaboration

From
$45/month
Free plan
No
Visit ProofHubFull review

The short version

  • ProofHub is an all-in-one project management and team collaboration software.
  • Nix is free; ProofHub starts at $45/mo.
  • Only Nix lists content-addressed store; only ProofHub lists time tracking.
  • Where ProofHub falls short: the Ultimate Control plan advertises $89 a month for the first 3 months and then charges $135, so the headline is an introductory rate.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Nix and ProofHub actually diverge.

Attributes where Nix and ProofHub differ
AttributeNixProofHub
Starting priceFree$45/month
Pricing modelOpen source, no licence feeSubscription
Free tierYesNo
PlatformsLinux, macOS, WindowsWeb, iOS, Android
CategoryDeveloper ToolsProject Management

Not yet recorded: founded for Nix.

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 Nix

  • Content-addressed store
  • Declarative system configuration
  • Atomic upgrades and rollback
  • nix develop shells
  • Flakes
  • Nixpkgs
  • Binary caches
  • Home Manager

Only in ProofHub

  • Tasks
  • Discussions
  • Proofing
  • Time tracking
  • Gantt charts
  • Slack
  • Google Drive
  • Dropbox

What people use each for

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

Nix

  • A team that wants every developer and CI runner to use byte-identical toolchains without shipping a container for local worknot ProofHub
  • Reproducing a research computation or a build years later from a pinned commit rather than a written recipenot ProofHub
  • Managing a fleet of Linux servers declaratively with atomic rollback if a deployment breaks a servicenot ProofHub
  • Building minimal container images from precise dependency closures instead of a base image plus a package managernot ProofHub

ProofHub

  • Project management for teamsnot Nix
  • Resource planning and reportingnot Nix
  • Collaborative workflow managementnot Nix

Where each one falls short

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

Nix

  • The Nix language is lazy, dynamically typed and poorly documented, and its error messages frequently point at the wrong expression, so debugging a failing build is a skill that takes months rather than days to acquire
  • Flakes are the way essentially everyone uses Nix in 2026 and are still formally an experimental feature behind a flag, meaning tutorials, official documentation and real practice disagree with each other constantly
  • Anything that expects a conventional Linux filesystem layout breaks: prebuilt binaries, language package managers that download their own toolchains, and proprietary vendor installers all need patching or an FHS-compatible wrapper
  • Project governance has been publicly fractious, producing the Lix fork and the separately funded Determinate Systems distribution, so a new adopter now has to choose which Nix before they can start
  • The /nix/store grows without bound until you garbage collect, and on a developer laptop with several pinned nixpkgs revisions it routinely reaches tens of gigabytes

ProofHub

  • The Ultimate Control plan advertises $89 a month for the first 3 months and then charges $135, so the headline is an introductory rate
  • The Essential plan caps projects at 40 and storage at 15 GB
  • Storage is 100 GB even on the higher plan, which is low for a tool holding project files
  • There is no free tier, and the entry price is a flat $45 a month billed annually

Pricing, plan by plan

Nix

Free
  • Nix and NixOSFree
    • LGPL-2.1 licensed, no commercial tier
    • Public binary cache at cache.nixos.org
    • Community support via forum, Matrix and GitHub

ProofHub

$45/month
  • Essential$45/mo
    • 40 projects
    • Unlimited users
    • 15GB storage
  • Ultimate Control$89/mo
    • Unlimited projects
    • Unlimited users
    • 100GB storage

Which should you pick?

Choose Nix if

  • You need content-addressed store.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want declarative system configuration.
Nix review

Choose ProofHub if

  • You need tasks.
  • You work on Web, iOS, Android.
  • You also want discussions.
ProofHub review

Questions people ask

Is Nix or ProofHub better?
Neither clearly leads. Nix starts at Free and ProofHub at $45/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Nix or ProofHub?
Nix has a free tier; the other does not. Paid plans start at Free for Nix and $45/month for ProofHub.
Does Nix or ProofHub run on more platforms?
Nix runs on Linux, macOS, Windows. ProofHub runs on Web, iOS, Android.
Can I use Nix for free?
Yes. Nix has a free tier, so you can try it without paying. ProofHub starts at $45/month.
What is Nix best used for?
Nix is most often used for a team that wants every developer and ci runner to use byte-identical toolchains without shipping a container for local work, reproducing a research computation or a build years later from a pinned commit rather than a written recipe, managing a fleet of linux servers declaratively with atomic rollback if a deployment breaks a service, building minimal container images from precise dependency closures instead of a base image plus a package manager. Of those, a team that wants every developer and ci runner to use byte-identical toolchains without shipping a container for local work and reproducing a research computation or a build years later from a pinned commit rather than a written recipe are not what ProofHub is typically brought in for.
What can Nix do that ProofHub cannot?
Nix covers Content-addressed store, Declarative system configuration, Atomic upgrades and rollback, nix develop shells. ProofHub covers Tasks, Discussions, Proofing, Time tracking.

Answered from the vendors’ own pages

Nix: Do I have to run NixOS to use Nix?

No. The package manager runs fine on any Linux distribution and on macOS, and most teams start there with development shells rather than converting their servers.

ProofHub: How much does ProofHub cost?

ProofHub offers two plans: Essential at $45/month (annual) or $50/month (monthly), and Ultimate Control at $89/month (first 3 months) or $135/month thereafter (annual billing).

Source
Nix: Is Nix a replacement for Docker?

It solves an adjacent problem. Nix reproduces the contents of an environment exactly; Docker distributes an image. Many teams use Nix to build the image.

ProofHub: Are per-user fees required with ProofHub?

No. ProofHub includes unlimited users in both Essential and Ultimate Control plans. There are no per-user fees regardless of team size.

Source
Nix: Are flakes safe to use in production?

They are used in production widely and are stable in practice, but they remain officially experimental, which means the interface can still change and documentation is split.

ProofHub: Does ProofHub offer a free trial?

Yes, ProofHub provides a 14-day free trial with no credit card required. You can explore all features before committing.

Source
Nix: What is Lix and should I care?

Lix is a community fork of the Nix implementation created after governance disputes. It is largely compatible; the practical impact is that you must decide which implementation your team standardises on.

ProofHub: Can I cancel ProofHub anytime?

Yes. ProofHub has no long-term contracts. You can cancel anytime and switch billing between annual and monthly plans.

Source
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