+++•••

Zero-setup agentic security

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

Bringdown's agents map and exploit your entire stack from the outside — then hand back ready-to-paste fix prompts your own coding agents run to close every hole. No install. No scoping call. No week-long pentest.

https://Go

No install. No scoping call. Just a URL.

See a real finding ↓

One URL · your whole stack

Web appsAPIsCloud & IAMAI agentsAuth & SSODatabasesWebhooksGraphQLServerlessAdmin panelsPayment flowsMCP toolsWeb appsAPIsCloud & IAMAI agentsAuth & SSODatabasesWebhooksGraphQLServerlessAdmin panelsPayment flowsMCP tools

How it works

The whole setup is one line: your URL.

Hand us a URL

Verify you own the domain and you’re done. No agent to install, no access to provision, no scoping call. If you can share a link, you can run Bringdown.

We attack from the outside

Our agents recon, chain, and exploit your entire stack the way a real attacker would — black-box, no insider access — and re-execute every exploit to prove it’s real.

Paste the fix, ship

Each finding arrives as a ready-to-paste Markdown prompt. Drop it into Cursor or Claude Code and your own agent closes the hole. Break, prove, fix — one loop.

A real finding → the fix

Most tools stop at the finding. We hand you the prompt that fixes it.

Here’s a real class of bug, proven end to end — the exploit, and the exact prompt your coding agent runs to close it. This is what lands in your inbox.

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

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.

Why Bringdown

Three things no scanner and no pentest firm does together.

Zero setup

One URL, nothing to install

No agent, no scoping call, no access to provision. Setup is a domain you already own. You’re running in minutes, not after a two-week onboarding.

Real break-in

Proven, not guessed

We chain small mistakes into a real way in and re-execute every exploit before you ever see it. If it can’t be reproduced, it never ships. No false-positive slop.

Agent-ready fixes

The output is a prompt, not a PDF

Every finding ships as Markdown your coding agent runs. The fix is one paste away — not a research project, not a ticket that rots in a backlog.

	Bringdown	Annual pentest	Scanners
Setup	One URL	Weeks of scoping	Install an agent
Attack style	Real break-in, from outside	Real, but once	Checklist scan
Output	Finding + agent-ready fix	A static PDF	A list of CVEs
False positives	Re-executed, proven	Low, then stale	High — the top gripe
Cadence	Every deploy	Once a year	Continuous but noisy
Pricing shape	Per app	Six figures / engagement	Per seat

Swipe the table to compare →

Early access

We’re onboarding a first cohort of design partners.

Bringdown is invite-only while we scale the engine. Design partners get continuous, zero-setup testing free through the program — and lock in founder pricing when we open up. Per app, whenever you’re ready. No per-seat games, no six-figure engagement.

Get early access See a finding

Design partners get

Continuous testing, free through the program
Findings with agent-ready fix prompts
Your APIs, cloud, auth & AI features covered
A direct line to the founders
Founder pricing locked in at launch

FAQ

Questions founders ask.

Shipping faster than you can secure?

Find out what you’ve left open.

Hand us a URL. We’ll break in like a real attacker and hand back the fixes — before someone worse does.

Get early access See how it works

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