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Duong Labs
Independent studio · Vietnam

Small, well-documented tools for developers.

Duong Labs is a one-person software studio. Each product ships as a focused, one-time purchase — no subscriptions, no dashboard to babysit, no growth-hacked upsells. Code is written and reviewed line by line before anything goes out the door.

Products

What we sell

Two products so far, both aimed at developers shipping their own software faster.

AI Agent QA & Eval Toolkit

Available now

Slash commands and sub-agents for Claude Code and Cursor that turn “I think the agent works” into “I can prove it” — eval suites, trace review, regression checks, and red-teaming for AI agents.

/eval-suite /trace-review /regression-check /red-team
799,000 one-time

SaaS Starter Kit

In final review

A Next.js 16 starter with Google sign-in, Stripe billing, and a working Claude API route already wired together — the week of setup a new SaaS idea usually costs, done once.

Auth.js Stripe Claude streaming
from 2,500,000

Checkout

How we sell

Checkout, digital delivery, and tax are handled by Lemon Squeezy, our merchant of record. Every product is sold at a fixed one-time price — you pay once, download instantly, and keep the code.

Customers find us through the Lemon Squeezy marketplace, GitHub, and developer communities such as Reddit and Indie Hackers.

Contact

Get in touch

Email
Response time
1–2 business days