I built an AI proposal generator for freelancers in 30 seconds – here's what I learned

Enrique Rubio López — Thu, 14 May 2026 10:57:51 +0000

The problem

Every time I had to write a proposal for a client, I spent 2-3 hours on it. Researching their brief, structuring sections, finding the right tone.
Most of the time the client had already hired someone else by the time I sent it.

So I built ProposalPilot.

What it does

You paste the client's project brief, pick your service type (web dev, design, marketing, consulting), and get a full personalized proposal in ~30 seconds. The output streams in real time so you see it being written, which feels surprisingly satisfying.

👉 https://autoproposal-six.vercel.app — free to try, 3 proposals/month

The stack

Next.js 14 (App Router, Server Components)
Anthropic Claude API for generation with streaming
Supabase for auth + database (RLS on every table)
Stripe for payments ($19/month Pro plan)
Vercel for hosting

The streaming was the trickiest part — piping Claude's stream through a Next.js Route Handler to the client with ReadableStream and TextDecoder. Once it clicked it felt like magic.

Where it is right now

This is an early version. The core flow works end-to-end but there's a lot still rough:

Templates could be smarter per niche
No PDF/Word export yet
The pricing section outputs a placeholder (you fill in your number)
Mobile needs work

What I'm trying to figure out

The technical side feels solid. What I genuinely don't know yet is whether the output quality is good enough that a freelancer would actually send it with minor tweaks, or if it's the kind of thing you'd rewrite entirely.