20+ years in software, and what kept breaking was never the product. It was the quotes, contracts and invoices. Building LeanCOO for that, in public.
In your approval queue
Joined June 2026
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LeanCOO is live on Product Hunt today 🚀
The AI back office for solo founders & small B2B teams.
AI drafts your quotes, contracts & invoices in ~30s — then stops. Nothing sends until you approve.
If this solves a pain you know, a little support today means a lot.
🤖 Made with AI
ALT LeanCOO dashboard — AI back office for B2B operations: quotes, contracts, invoices, approvals, and monthly status in one flow.
anyone else apply to the #Claude for startups program? the acceptance email came yesterday.
A year of claude with a bit more room to breathe.
if you run a startup and have not applied yet, it is still taking applications...
#ClaudeStartups
i edit in capcut. every ai feature sat behind a subscription.
so i built a simple one. finds the scene you want, strips silent gaps, trims repeated stretches. clickhouse + vertex ai.
mvp, so that's the whole feature list. code is open.
code: github.com/devkan/RevisionPr…
walkthrough: youtu.be/KS1vJDMnnW4
writeup: devpost.com/software/revisio…
Expedia, Booking dot com, Shopify, Etsy, Instacart, Target are testing WebMCP, the standard that lets a website hand its buttons to AI agents. The Chrome origin trial is already live.
But who authorizes an agent to spend my money? I couldn't find a good answer.
A chat message saying "go ahead" can be replayed. So I made approval work like a concert ticket: exact amount, 120 seconds, one use.
Then I replayed the used approval on camera. The server said no: lease_replayed. Refund count stayed at 1.
3-min demo: youtube.com/watch?v=GIsiIKKA…
Full write-up: blog.kanapp.net/posts/the-we…
Built with Gemini, WebMCP, Cloud Run and Document AI for the #AllThingsAgentic Hackathon. #WebMCP #AIAgents
We can ship a new feature in a day.
Getting the first 100 people to actually care took us three months.
The hard part was never the code.
Founders who've shipped something real: what finally got you your first users?
I was about to start paying for ads. Then I got nervous.
My product runs in several languages I am not equally fluent in. One quiet break in a locale, and the ads would just keep delivering strangers to a broken screen.
So I handed the whole product to a coding agent for 29 hours first.
Then two more issues showed up that the agent never flagged. I caught them by eye.
One record wrong in a single language. And a payment event that was not firing, the exact metric I needed to judge the ads I was about to buy. Silently wrong forever, and nothing threw an error.
Takeaway: continuity is the capability, not intelligence. And you still have to stay in the loop. Both times something slipped, a human looking at a screen caught it.
Full writeup, prompt included:
blog.kanapp.net/posts/i-was-…
Before a contract exists, the real work is scattered across calls, emails, and Teams threads.
For OpenAI Build Week we added a Pre-contract Workspace to LeanCOO. It turns those into one grounded brief: scope, what is confirmed, open risks, next action.
Two rules we kept:
- every AI line is traceable to its source, no invented facts
- nothing moves without a human approving it. The AI never sends a quote on its own
Built with Codex and GPT-5.6. Live AI runs on Amazon Bedrock.
Full write-up and a short demo: blog.kanapp.net/posts/pre-co…
If you quote clients, where does your pre-contract info live right now?
5 days building LeanCOO with AI. Around 544M tokens, real features shipped.
The honest part: AI was fast, but a human still checked every output before it went live. That is exactly how LeanCOO works too. AI drafts, you approve.
Full log: blog.kanapp.net/posts/five-d…
#buildinpublic
🤖 Made with AI
ALT Dark control-room scene with bold white text: 544M tokens, 5 days. Below it reads: AI moved fast, human judgment made it production-ready. Glowing blue data streams flow past Day 1 to Day 5 markers toward a green approval checkmark, while a person at a desk reviews several dashboard screens.
There is a French phrase for the dusk when you cannot tell a dog from a wolf on the hill.
We are in that hour now, only what we cannot tell apart is the human from the AI.
I wrote about it as a developer:
blog.kanapp.net/posts/the-ho…
Been talking to small agencies this week and the same line keeps coming up: the work isn't the hard part, it's all the quotes, invoices and approvals around it. Nobody starts a business to chase paperwork. Honestly that's why I'm building LeanCOO. What eats the most of your admin time?
Ever lost a deal in the gap between "quote sent" and "invoice paid"?
We wrote up the story of why LeanCOO exists — four scattered tools, one workflow, AI drafts + human approval.
Full story on our new blog 👇
blog.kanapp.net/posts/from-q…
