A simple guide to AgentNoah
If you've never used AgentNoah and you want to understand what it actually does in plain English, you're in the right place. This guide assumes no technical background.
In one sentence
AgentNoah is like a senior engineer that lives inside your coding tool and looks at every line of code you ship — finds bugs before your users do, fixes them, and even builds new features for you. You use your own AI subscription (Claude Code, Cursor, VS Code Copilot) — we don't charge you for the thinking.
Who is this for?
- →Solo developers who can't afford a full security team
- →Two-person startups that want a "second pair of eyes" on every code change
- →Anyone who's worried about shipping bugs to real customers
- →Indie hackers using AI tools like Cursor or Claude Code who want a quality safety net
If you write code (or pay someone who does), AgentNoah is for you.
The three big things AgentNoah does
Think of AgentNoah as three different services bundled together. They all use the same AI brain (yours), but they do different jobs.
"Tell me what's wrong with my code, before my customers find out."
How it works: A 3-loop audit method: two AI scouts read the code separately (one for security, one for performance), a reconciler decides which findings are real, then a frontier reviewer catches deep architectural issues.
Real-world analogy: Like getting a medical diagnosis from 4 specialists — a cardiologist looks for security issues, a neurologist looks for performance issues, an attending physician reconciles their findings, and a senior consultant catches deep architectural issues. You get a much more accurate diagnosis than asking one doctor.
"Don't just tell me what's wrong. Fix it for me."
How it works: For every finding, click 'Fix in your IDE' — a modal opens with a fix prompt. Paste it into Claude Code, Cursor, or VS Code Copilot. Your IDE's AI uses AgentNoah's MCP tools to write the fix and open a Pull Request on your GitHub repo. You review and merge. $0 to AgentNoah — uses your existing AI subscription.
Real-world analogy: Like a contractor who finds a leaky pipe, hands you a written estimate of how to fix it, and only swings a wrench after you sign off.
"I want to add a new feature to my app. Help me build it the right way."
How it works: 16 disciplined steps walk your IDE's AI from spec → tests-first → code → self-audit → review → PR. Layered with cross-audit memory + multi-model 3-loop reviews.
Real-world analogy: A pilot's pre-flight checklist. Yes, you could just take off — but the checklist is why airline accidents are rare. AgentNoah is the checklist for shipping code.
The optional add-on: REPLACE
"Watch every push. Fix small bugs automatically. Wake up to a cleaner repo."
REPLACE is a paid add-on ($3 per fix). The difference:
- →FIND / FIX / BUILD = you ask, your AI does the work in your IDE
- →REPLACE= your IDE doesn't need to be open. AgentNoah's own AI watches every code push and quietly fixes small problems while you sleep.
When does REPLACE auto-merge? Trust-tier matrix — P0 critical security always alerts a human (never auto-fixed). P3 cleanup fixes (style, naming, unused imports) auto-merge after ≥1 prior clean merge. P2 (medium severity) unlocks at 5 merges + 7 days. P1 (high severity) unlocks at 20 merges + 30 days + ≥80% merge-success rate. Higher tiers stay PR-for-review until trust compounds.
Trust compounds:The more good fixes REPLACE delivers that you accept, the more it's willing to handle on its own — like a new employee earning more responsibility over time. New customers start with P3-only auto-merge; the higher tiers (P2, P1) unlock as your merge history grows.
Cost:$3 per fix that gets opened. First fix on every repo is free (so you can try it). Hard cap of 300 fixes per month — you can't accidentally rack up a huge bill.
How does this all work?
You have three things going on at the same time:
- Your code lives on GitHub. Same as before. Nothing changes.
- You write code in an IDE like Cursor, Claude Code, or VS Code. Same as before. Nothing changes.
- AgentNoah connects them — it gives your IDE special skills via something called "MCP" (think of it as a plugin that adds a senior engineer to your IDE's toolkit).
The key insight: AgentNoah doesn't do AI thinking on our servers for FIND, FIX, or BUILD — the optional REPLACE add-on is the only exception. Your IDE's AI (Claude, Cursor, GitHub Copilot — whichever you already pay for) does all the work. We just provide the methodology — the structured way of running audits, the memory of past bugs, the discipline of the 16-step build process.
This is called BYOL — Bring Your Own LLM. It means:
- →You're not paying twice for AI (once to Claude, once to AgentNoah)
- →We can charge much less ($39/month) because our AI bills are minimal (embeddings only, plus opt-in REPLACE add-on)
- →For FIND/FIX/BUILD, your code only goes to your IDE's AI provider. We don't store your code (see /privacy for full details, including the REPLACE exception).
Pricing
| Plan | Price | What you get |
|---|---|---|
| Free trial | $0 for 14 days | 25 audits + unlimited BUILD, 1 repo — try everything before paying |
| Pro | $39/month | 2,000 audits/mo · 20 repos · FIND + FIX + 16-step BUILD all included |
| Founding-20 lock | $29/month forever | Same as Pro. Locked in for the first 20 paying customers, as long as you stay subscribed. |
| REPLACE add-on | $3 per fix | Pay only when an autonomous fix gets opened. 1 free fix per repo (lifetime trial). Hard cap 300/mo. |
No usage-based surprises. Pro covers nearly all customers' real-world audit needs. If you somehow do 2,001 audits in a month, we email you — we don't silently charge.
Where to next
Continue through the docs to see the full feature menu, get your IDE connected, and walk through a real audit + build end-to-end.