Viaduct is a B2B product built for software teams and developers using AI coding agents.

Does Viaduct have a free plan?

Yes — there is a free tier, with paid plans for advanced use.

What platforms does Viaduct run on?

Viaduct runs on the web and API.

Is Viaduct still maintained?

Unverified. Viaduct has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Viaduct?

Similar projects tracked by PulseGate include ThinkComposer #, PlantUML File Viewer, and Ideaflip.

Who develops Viaduct?

Viaduct is developed by Quiet Grid Labs.

Does Viaduct have an API or integrations?

Yes — Viaduct exposes an MCP server.

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Viaduct

Name: Viaduct
Author: Quiet Grid Labs

quietgridlabs.comDiagramming & whiteboards

Viaduct is a browser-based C4 modeling tool for creating system context, container, component, and code diagrams. It attaches documentation, sequence diagrams, schemas, and API contracts to model elements and exposes the architecture to AI coding agents through MCP.

FreemiumWebCloud-managedAPI

Visit quietgridlabs.com

Overview

10 features

Viaduct sits in PulseGate's Diagramming & whiteboards category. It focuses on keeping software architecture models current and making them usable by AI coding agents. Viaduct is a B2B product aimed at software teams and developers using AI coding agents. A free plan is available. It ships for the web and API.

It is developed by Quiet Grid Labs. Key capabilities include C4 diagrams, live collaboration, and markdown documentation. It exposes integrations via an MCP server.

Summary written by a language model from the project’s public pages.

C4 diagrams
Live collaboration
Markdown documentation
Live preview
Sequence diagrams
API contracts
ER schemas
MCP server
Architecture change sets
Browser editing

Built with & integrations

AI providers

anthropic

Connectors

MCP

Runs on

BrowserCloud-managedAPI-only

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tier

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed11 Sept · 23:29 UTC
Show HN: Viaduct – Architecture change sets for AI coding agents verified via Hacker News firehose (Algolia)
Source: Hacker News firehose (Algolia) · Open

Frequently asked questions about Viaduct

What is Viaduct?: Viaduct focuses on keeping software architecture models current and making them usable by AI coding agents. It is catalogued under Diagramming & whiteboards on PulseGate.
Who is Viaduct for?: Viaduct is a B2B product built for software teams and developers using AI coding agents.
Does Viaduct have a free plan?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does Viaduct run on?: Viaduct runs on the web and API.
Is Viaduct still maintained?: Unverified. Viaduct has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Viaduct?: Similar projects tracked by PulseGate include ThinkComposer #, PlantUML File Viewer, and Ideaflip.ThinkComposer #PlantUML File Viewer Ideaflip
Who develops Viaduct?: Viaduct is developed by Quiet Grid Labs.
Does Viaduct have an API or integrations?: Yes — Viaduct exposes an MCP server.

At a glance

Pricing: Freemium · pricing page detected · free tier
Platforms: API · Web
Languages: English
First seen: 11 Sept 2026
Built for: software teams and developers using AI coding agents
Model: B2B
Solves: Keeping software architecture models current and making them usable by AI coding agents.

Developer

Quiet Grid Labs

Index record

Indexed: 11 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 11 Sept 2026

Identity audit (13)

Slug: show-hn-viaduct-architecture-change-sets-for-ai-codi-quietgridlabs-com
Lifecycle state recorded: 11 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 11 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 11 Sept 2026
Canonical URL: https://c4.quietgridlabs.com/

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