PrototyperPitch/2025
Prototyper

Build the next Figma/Linear with Prototyper

ProductPrototyper

Demo

Create a fast, keyboard-first issue tracker: Triage inbox; statuses Backlog→Todo→In-Progress→Done; fields Assignee, Priority, Labels, Due Date, Estimate; Subtasks + Dependencies; Board & List views; instant search + filters; real-time editing.
Where we arePrototyper

Pre-launch we have achieved:

4000+

Registered Users

800+

Apps created

100+

Paying customers

Top workflows by users
High fidelity design

Interactive, brand-matching UIs.

Personal software

Automations, trackers, and tools.

API visualizations

Live data views and admin.

TeamPrototyper

Team

Thijs Verreck

Thijs Verreck, CEO

2x Engineer/Designer Founder. Previously scaled to 100k+ MRR at Wavyr. Background: CS/ML from Imperial College London & TU Delft, been working in AI since 2018 and building software since 2015.

Next hires:

1.

Compiler architect

Responsible for the Prototyper code runtime.

2.

Design systems lead

Responsible for benchmarking design capabilities and creating a design system.

3.

Developer advocate

Responsible for developer relations and community building.

The constraintPrototyper

The bottleneck isn’t just cognition. It’s toolability.

Models are great at short, local tasks; they struggle with long‑horizon planning. As the number of steps grows, small errors compound and plans drift.

Memory

Short working memory; no persistent long‑term state.

Accuracy

Per‑step accuracy ≈ 0.90. Over N steps it decays as 0.9^N (e.g., 4 → ~0.66).

Branching

Each additional/different tool call adds a failure surface → more branches, more chances to err.

We reduce branching and tool switching by owning interaction, context, and infrastructure.

Prototyper

Expanding beyond the model layer

Infrastructure comparison

By owning the full stack — interaction, context, and infrastructure — we can do things others can't.

While competitors focus on just how users interact with the model, we solve accuracy issues at every layer: How users interact with the model, what context models see (am I used by a designer or an engineer?), and where code runs.

  • • Interaction: Offering a user-friendly platform for users to build and use their applications
  • • Context: Letting users turn prompts into artifacts for their organization
  • • Infrastructure: Code runtime, data-persistence, and deployment platform
Vertical IntegrationPrototyper

A platform that works across layers

Vertical integration layers

We own interaction, context, and infrastructure.

  • • Interaction: Prototyper is the platform for users to build and interact with their applications
  • • Context: Vibecode.sh lets users turn prompts into artifacts for their organization
  • • Infrastructure: Different SDKs (runtime, data-persistence, and deployment) to support high-grade applications

Validation: we can upgrade all applications on the platform in ≤48h; ship‑rate and edit success tracked.

Why we winPrototyper

Our strategy

Focus on security, quality, and craftsmanship

Remove the AI quality objection by prioritizing security, quality, and craftsmanship

Measure success by usage and adoption of apps created with Prototyper

Measure success by actual usage and adoption of apps created with Prototyper

Create network effects via Vibecode.sh

Build a community-driven directory of reusable prompt artifacts that can be used by other users

Security removes objections. Usage tracking proves value. Integrated deployment reduces friction. Together, they create a product people choose over assembled alternatives.

GTM & TimingPrototyper

Go-to-market & timing

ICPs

  • • SMEs and mid-market companies
  • • Building interactive apps (Figma/Linear-class)

Distribution

  • • Templates/workflows reuse; solved builds become distribution
  • • Community and SF presence

Timing

  • • Fast-track to the US market
  • • First hires: Eng lead, Sales, DevRel post-financing
The AskPrototyper

$3M seed round

Closing Q4 2025

Use of Funds

Engineering

60%

Scale team to build infrastructure, real-time collaboration, and AI orchestration

Go-to-Market

25%

First sales hire, developer relations, and community building in SF

Operations

15%

Infrastructure, legal, compliance, and 18-24 month runway

Near-term milestones

•

Turn Vibecode.sh into the sdk for natural language prompt artifacts

•

Ship secure data-persistence layer for Prototyper applications

•

Become the default platform for building interactive apps

•

Improvemed management and upgrade process of Prototyper applications

Business Model

Subscription tiers

Infrastructure usage pricing