+++•••

Hand us a URL.
We break in
like a real attacker.

Bringdown's agents map and exploit your app, APIs and AI features from the outside, then hand back ready-to-paste fix prompts your own coding agents run to close what they find. Built for fast-moving teams with quickly evolving products.

A URL is all we need to get started.

See an example ↓

One URL · everything it touches

Web appsAPIsExposed cloudAI agentsAuth & SSOData exposureWebhooksGraphQLServerlessAdmin panelsMCP toolsWeb appsAPIsExposed cloudAI agentsAuth & SSOData exposureWebhooksGraphQLServerlessAdmin panelsMCP tools

Who is this for?

Built for startups.

We are built for founders.

Your time is limited and valuable. Our tool runs security testing automatically and as cheaply as possible, then hands back findings with ready-to-use prompts for your agent team to resolve them.

We attack from the outside

Our agents recon, chain, and exploit your app, APIs and AI features the way a real attacker would. Black-box, no insider access. Every exploit is re-executed to prove it’s real in a non-destructive way.

Computational AI

Our AI agents live inside environments that let them find exploits in your product by iterating and learning like a hacker would. One of the key features is that they have their own integrated systems and toolkits. They stop at proof: far enough to show the door opens, never far enough to walk through it.

Example workflow

The best way to keep an agile team's product secure.

Bringdown finds advanced bugs specific to your stack and platform by simulating real user behavior and learning your business logic as it goes, so every run is sharper than the last. Then we hand you the toolkit and the infrastructure to close them: run the fix with your own coding agents, or push the issue straight into the tracker your team already works in.

1 · What we find

finding · BDR-2041Critical

Broken object-level authorization

Any user can read every other customer’s invoices.

A logged-in user on one account can fetch any other account’s invoices by changing the ID in the URL. No admin role, just an incrementing number. Billing data exposed across every tenant.

GET /api/v2/invoices/80412 HTTP/2
Host: app.acme.com
Cookie: session=<tenant-A user>

200 OK
{ "id": 80412, "tenant": "tenant-B",
  "total": "$18,240.00", "card_last4": "4471" }

reproduced 2×access valid session, wrong tenant

2 · What you paste

fix-prompt.md Copy

## Fix: broken object-level authorization
Endpoint: GET /api/v2/invoices/:id

Enforce tenant scoping on the invoice lookup:
- Load the invoice, then return 404 if
  invoice.tenant_id !== session.tenant_id.
- Never trust the :id in the URL as authorization.

Add a regression test:
- A user in tenant A requesting a tenant B invoice
  id must receive 404, not 200.

Then audit these sibling routes for the same gap:
- GET /api/v2/orders/:id
- GET /api/v2/users/:id

Paste into Cursor or Claude Code → review the PR → ship.

Simplified for illustration. Real findings are usually far messier than this: multi-step chains across several services, not a single endpoint.

Integrations

Built to fit the tools your team already works in.

Used by

We are in beta and onboarding design partners now. Every slot on this wall is still open.

Could be you
Could be you
Could be you
Could be you
/Could be you
Could be you

Why Bringdown

Doing nothing works until someone asks.

You are shipping every week and security is the thing you will get to later. The closest thing you have to a review is whatever your coding agent flags while you work. That holds up right until an enterprise customer sends you a security questionnaire, or until someone finds the hole before you do.

What you have now

Your coding agent never opens the app.

Claude and Codex read your source and reason about what it might do. Neither can log in as one tenant and read another tenant's invoices, because that only exists once the thing is running. It is a good review of your code and no review of your product.

What you will be asked for

A pentest is true on the day it lands.

The first enterprise customer who wants to sign will ask for one. It costs $10k to $30k, takes weeks to scope, and describes the product as it was that week. You ship every week.

What you might buy instead

A scanner only checks version numbers.

It matches your dependencies against a list of known CVEs and hands you the list. It has no idea whether any of it is reachable in your product, so you end up triaging a queue instead of fixing a hole.

Where the others win, we left it in.

	Bringdown	Annual pentest	AI code review
What it looks at	Your running product	Your running product, once	Your source code
Can it read another tenant's data?	Yes, and shows you the request	Yes, on the day it ran	No, it never logs in
What you get	An exploit you can replay	A PDF	A suggestion
When	Every deploy	Once a year	Every commit
Cost	Per app, per month	$10k to $30k per engagement	Bundled with your plan

Swipe to compare →

Early access

We are in beta and looking for design partners.

Bringdown is in beta. We are looking for a small number of companies to run it against their real product and tell us where it falls short. If you are shipping fast and your product changes every week, join the waitlist and we will get in touch. Design partners use it free of charge for the initial period.

Design partners get

The product free of charge for the initial period
Real influence on what we build next
Findings with a fix prompt you can paste
A direct line to the founders
Founder pricing when we open up

FAQ

Questions founders ask.

Shipping faster than you can secure?

Find out what you’ve left open.

Leave your email and your URL. We come back with what we found, or with what we tried and could not get past. Either way you will know where you stand.

Get early access See who it's for

Hand us a URL.We break inlike a real attacker.

Built for startups.

We are built for founders.

We attack from the outside

Computational AI

The best way to keep an agile team's product secure.

Any user can read every other customer’s invoices.

Built to fit the tools your team already works in.

Doing nothing works until someone asks.

Your coding agent never opens the app.

A pentest is true on the day it lands.

A scanner only checks version numbers.

We are in beta and looking for design partners.

Questions founders ask.

Do I really only give you a URL?

Do you need access to our code?

What do I get back?

Will you break my production app?

Can it test our AI features?

Is there a human in the loop?

What does it cost?

Find out what you’ve left open.

Hand us a URL.
We break in
like a real attacker.