Sizzleby Prompt Driven

Feature validation for product teams

Test the feature before you build it.

Sizzle turns a feature spec into a launch-quality product video — your brand, narration, motion — before the feature exists. Measure real demand against your own users before you spend the engineering budget.

For product teams at companies with an existing codebase.

Early access — we onboard design partners in small batches.Works from your specs · 4–6 weeks · keep the assets

The Sizzle product video

The Sizzle product video — test a feature with your users before you build it.

Awarded2nd place ($5K) at the Soulscape film hackathon — against 40 films

How it works

From spec to shipped — in one loop.

Feature specA PRD section or Linear ticket
Launch-quality videoTwo to four variants, tested head-to-head
Your own usersIn-app and email, private
Commitment ladderViews, waitlist, qualified, intent
Ship the winnerValidated — a PR in your repo

The problem

Most features ship and barely get used.

About 80% of shipped features are rarely or never used — each one a roadmap bet that cost real engineering time. Sizzle lets you place that bet before you build, and kill the wrong ones before they cost a quarter of engineering.

~80%of shipped features are rarely or never usedPendo, 2019 Feature Adoption Report

The high-resolution painted door

Your painted door, in high resolution.

Real demand from the users who'd actually pay — not views from strangers.

You already run painted-door tests. They lean on text and need an engaged user to click through and read. Sizzle shows the solution in thirty seconds, so users self-qualify — and you make contact with reality in days, not a ship-and-verify cycle.

63% would rather watch a short video to understand a product. 12% prefer text.Wyzowl, 2026
  1. 01

    Feature spec

    Start from the Linear ticket or PRD section you already have. Feasibility-bounded, so the video depicts something you can actually build.

  2. 02

    Branded video variants

    We generate two to four launch-quality variants — narration, motion, music, your brand. No design cycles.

  3. 03

    Run on your own users

    Test in-app and by email against your real audience. Private by default, segment-scoped.

  4. 04

    Commitment-ladder readout

    Views, then waitlist, then qualified signup, then payment intent — scored against thresholds you set before launch.

Why it works

Hollywood greenlights with sizzle reels. Now your roadmap can.

A sizzle reel is the video Hollywood makes to sell a film that doesn't exist yet. Software's most famous validation was the same move — the 2008 Dropbox demo video grew a beta waitlist from a few thousand to tens of thousands overnight, before the product was publicly available. Sizzle is that move, aimed at one feature and wired to measurement.

The commitment ladder

Real signal, ranked by what it costs the user.

  1. L0Views / completionVirality signal — not validation
  2. L1Waitlist signup
  3. L2Qualified signup
  4. L3Payment intent
  5. L4Design-partner commitment

A feature is "validated" at Level 2 or higher — against a threshold you pre-register before the test, so the result can't be moved after the fact.

Why teams pick the video door

A stronger test, with less to integrate.

  • No code access to validate

    We work from your specs and brand assets to test demand — nothing to integrate, nothing to approve. Building the winning feature in your repo is a separate, opt-in step.

  • Honest by design

    Users see a clear "concept preview — help us decide," never a launch promise. A disclosed concept test yields deliberate-commitment signal, arguably stronger.

  • Pre-registered, not post-hoc

    Thresholds and metrics freeze at launch. The signal you measure is the signal you agreed to measure.

  • Fits your agent workflow

    Drive it from the CLI today; an MCP server (Claude-accessible) is next — wired into the Linear and git flow your teams already use.

  • Not a prototype to click through

    A thirty-second watch, not a maze — higher completion, one consistent happy path, and nothing that breaks under interaction. No design cycle.

The pilot

Run it head-to-head against your painted door.

Pick one or two upcoming features. We produce the video door from your specs; you run it against your current painted door on a split audience. We compare qualified-signal rate, engagement burden, and time-to-decision together. A fixed four-to-six-week window, and you keep the assets — if a feature ships, its launch video already exists.

Built for every roadmap cycle — test each feature before it earns a sprint.

From validated to shipped

Validated? Now ship it.

When a feature wins, the spec and the facade you already built flow into a real pull request in your own repo — built by your agents or the PDD pipeline, reviewed and shipped by your team. Validation gave you the head start; the winning concept never starts from scratch.

Make contact with reality sooner.

Get early access to Sizzle.