HighFi
Early access · local first

Make what we design and what we ship the same thing.

Give every team a precise, provable link between its design files and its running code, so people and their agents can build fast without losing the design.

Run it on your machineSee where we are

Runs at localhost. Your code and design files never leave your machine.

HighFi's Drift view on its own design file: rows by state, with drift percentages
HighFi checking HighFi: the Drift view on its own design file.
Try it live

HighFi, checking its own design

The real app, running on HighFi's own Pen file and code. Click around: Drift, the Library, Tokens, Flows. It's read only here; download it to run it on your code.

Open full screen →
How it works

Import, see drift, resolve toward one side, approve, seal.

A lock between a design file and the code that renders it. Design and code drift silently, and coding agents make the code side move faster every month.

  1. ImportPoint HighFi at your frontend repository and your Pen file. It detects your framework.
  2. See driftEvery component and screen gets a state, with hash and pixel evidence.
  3. ResolveSend a row to your coding agent, or a brief to Pen for the design side.
  4. ApproveRead the diff. Nothing is committed or pushed until you approve it.
  5. SealAttest the match. The lock records it in your repository.
What we believe

Design and code never drift apart in silence.

Proof over promise

We show evidence: hashes, captures, tests, numbers. A claim without evidence is a question.

People decide

Agents propose and do the work; a person approves every commit, push, seal and design change.

Yours stays yours

Work stays on the team's machine and in its repository, in open files; no accounts, no telemetry.

Who it is for

Teams who design in Pen and ship with code, and the people between those two worlds.

Design engineers and product designers who own a design system.

Frontend teams who use coding agents and need to know what the agents changed.

Founders and small studios running several products; our own first: Open Efficiency (HighFi), Otto (Otto Marketplace, GoBookIt.ai, Candid), Efficiency Ventures (MVP Stadium).

On the team's own machine and in their repository; nothing leaves either.

The app runs at localhost; phones on the same network can open it.

A Rust engine at the core, a local web app around it, adapters at the edges.

The Rust engine (hifi) owns the canonical model, hashes, locks and seals; it is the boundary the app builds against (D-63).

Your framework, your library

React, Next.js and Rails first; Swift and Flutter next. HighFi writes your component library in your own stack.

Pricing at launch

Buy it once. Keep it.

A perpetual licence with a year of updates. The licence key is checked on your machine, so there are no accounts and no subscription. Every plan starts with a 14-day trial per project.

Non-commercial

$49 one seat
  • Personal projects, students, non-profits
  • Every feature
  • 12 months of updates

Commercial

$499 per seat
  • For teams shipping products
  • Every feature, every adapter
  • 12 months of updates

Team of three

$1,499 three seats
  • Three commercial seats
  • Extra seats at $499
  • 12 months of updates
Where we are

Production onboarding for outside teams by 13 October

A team outside ours installs HighFi, points it at its frontend repository and its Pen file, and within a working day sees every component and screen with a drift state, fixes drift through an approved agent run, and seals what matches, with a licence key.

55%
partlyOne-command install, localpartlyOnboard a codebase (React, Next.js, Rails)metOnboard a Pen filemetDrift per component and screenpartlyFix through an approved agent runnot metSeal through the Rust enginemetSecuritynot metLicence key and trialpartlyDocs for a strangerpartlyDogfood proof on five projects

We build HighFi with HighFi, in the open. The live roadmap shows every decision, plan and branch.