Quiet Grid Labs
Quiet Grid Labs is an independent software studio building digital products, connected systems and AI-powered experiences. Its stated method is to reduce the distance between a system diagram and the information people or AI agents need to act on it.
At a Glance
- Software product teams maintaining complex systems
- Software architects and engineers
- Teams needing shared C4 architecture documentation and review
- Organizations using Cursor, Claude Code, Claude Desktop or other MCP clients
- +2 more
AI Tools by Quiet Grid Labs
(1)
Viaduct
C4 Architecture Modeling Editor
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Latest News
Viaduct 0.3.0: canvas and workspace polish, arrangement tools, dirty dialogs, alignment guides and refreshed landing/About pages
Viaduct 0.2.0: model branches, agent chat, Magic-flow improvements, technology catalog endpoint, DSL project context and level navigation
Viaduct Community open-core edition published on GitHub as a local browser C4 editor
Viaduct MCP server shipped publicly on GitHub and reached version 1.0.0
Products & Services
Browser-based C4 architecture editor and hosted team product. It keeps system context, containers, components and code in one navigable model, with Markdown documentation, PlantUML sequences, ER models, API contracts, Magic flows, collaboration, sharing, JSON export, change sets and an MCP server.
Local, open-core Viaduct edition that runs in the browser without an account. It provides all four C4 levels, Magic flows, documentation and contracts, browser persistence, JSON import/export and offline use under BUSL-1.1.
MCP server for Viaduct that gives Cursor, Claude Code, Claude Desktop and other MCP clients authenticated read/write access to C4 elements, documentation, PlantUML sequences, data flows and change-set-related context.
Beta conversational AI website and widget builder. Users describe an idea, refine it through chat and publish a website or widget to a quackly.site subdomain; the product advertises 27 themes and one-click publishing.
Market Position
Quiet Grid Labs positions Viaduct as a focused, browser-based C4 modeling tool where the four C4 levels form one navigable model and documentation, sequences, schemas and API contracts stay attached to the elements they explain. Its own comparison names IcePanel, Enterprise Architect, Visual Paradigm, Archi, Gaphor, StarUML, Archipeg, GenMyModel and Aplas as alternatives. The stated trade-offs are that Viaduct is C4-focused, browser-only, has a smaller ecosystem, and does not reverse-engineer models from code; its differentiators are local-first use, attached context and MCP access for coding agents.
Leadership
Founders
Igor Golovko
Founder and CTO of Viaduct and the person identified on the official About page as behind the model. He says he has more than 15 years of end-to-end software-engineering experience and about a decade working with system design; he builds software and leads teams working with complex systems.
Executive Team
Igor Golovko
Founder & CTO of Viaduct
Software engineer and team leader with more than 15 years building systems end to end and about a decade focused on system design; official materials describe him as the person behind Viaduct's model.
Founding Story
Quiet Grid Labs says it exists because architecture knowledge kept leaking out of the model into places nobody maintained. Viaduct began as Igor Golovko's internal answer to systems documented across Miro, Confluence and other disconnected artifacts: a C4 model that could hold flows, contracts, decisions and implementation context in one explorable place. The studio's stated initial vision is to build focused developer tools with production discipline rather than a broad platform story.
Business Model
Revenue Model
Viaduct is free in the browser, including its levels, MCP server, collaboration and change sets. An account adds cloud storage, sharing, team collaboration and hosted MCP; organization-wide access and company rollouts are handled on request. The site also invites voluntary donations, explicitly saying donations buy nothing but the work continuing. Quackly is offered as a beta product with publishing to quackly.site subdomains, but no monetization terms were stated on the fetched pages.
Pricing Tiers
Runs locally in the browser with no account; the model stays on the user's machine.
The official site says cloud storage, collaboration, MCP and change sets are included; organization access is granted on request.
Target Markets
- Software product teams maintaining complex systems
- Software architects and engineers
- Teams needing shared C4 architecture documentation and review
- Organizations using Cursor, Claude Code, Claude Desktop or other MCP clients
- Developers wanting a local, self-contained architecture editor
- People and small teams building websites or widgets with conversational AI via Quackly
- Documenting software architecture as a living model rather than disconnected diagrams
- Onboarding engineers and answering how a request travels across services and endpoints
- Tracing relationships from system or container level into components, APIs and implementation details
- Architecture reviews, change-set review and communicating proposed model changes
- Giving coding agents architecture context through MCP while retaining human control
- Capturing API contracts, data models, sequence flows and operational or ownership notes next to the elements they describe