Built for early-stage startups · 48-hour turnaround

You shipped fast. Is your code actually secure?

Most early-stage startups don't have a security engineer — and most have real vulnerabilities in production right now. We find them in 48 hours.

A founder-friendly security review: real vulnerabilities in your shipped code, severity-ranked, with code-level fixes. Done before your next investor meeting.

Only 5 reviews per week · Next slot: this Thursday · No commitment

✓  150+ startup reviews completed ✓  48-hour turnaround, guaranteed ✓  No security engineer required ✓  Trusted by pre-seed to Series A founders

Our consultants have worked at

Point72 · Handshake · National Grid · Northeastern University

Who this is for

This is built for you if…

We're not an enterprise consultancy. We built this specifically for founders and small teams who are shipping product and need to know where they stand on security — fast.

Early-stage SaaS startups (1–50 employees)

You've shipped your product, you have real users, and security keeps getting pushed to "next sprint." We do it for you — once, fast, without derailing your roadmap.

Founders shipping MVPs quickly

You moved fast to get to market. That's the right call — but fast code accumulates security debt. Before you scale users, let's find what's exposed.

AI startups with fast-moving APIs

LLM wrappers, inference endpoints, and AI APIs introduce unique attack surfaces — prompt injection, insecure tool calls, model data exfiltration. We know what to look for.

Fintech startups handling sensitive data

Payments, bank data, user PII — one misconfiguration and you're in breach territory. We give you confidence before you pitch investors or land enterprise customers.

Also a great fit if you're preparing for a fundraise, going through investor security due diligence, or onboarding your first enterprise customer who's asking about your security posture.

The reality for most startups

You don't have a security engineer. Neither does your co-founder.

That's fine at day 1. But by the time you have real users and real data, the vulnerabilities you shipped in month 2 are still there — waiting.

Secrets committed to repos during the sprint

API keys, database URLs, and Stripe secrets get committed in the rush to ship. Automated bots scan GitHub 24/7 and find them within minutes.

Auth built fast, not built right

Homegrown auth systems and admin panels often skip server-side checks. A single missing middleware call can expose every user's data to anyone who knows the URL.

Cloud infra configured for "just get it working"

Default-open S3 buckets, overly permissive IAM roles, and staging environments with production data — set up fast and never revisited.

An investor or customer asks about your security posture

Due diligence, enterprise sales, SOC 2 prep — suddenly you need to show you've actually checked. "We'll look into it" isn't the answer they want.

None of these take a sophisticated attacker. They take 10 minutes and a Google search. We find them before anyone else does.

The deliverable

A real vulnerability discovery, not a compliance checkbox

This isn't a questionnaire or a framework walkthrough. We look at your actual shipped code and infrastructure, find what's broken, and tell you exactly how to fix it.

We look at your actual code and infra

Not just a surface-level scan. We review your repos, cloud config, auth flows, and API endpoints — the same places a real attacker would look.

Ranked by what actually matters to you

Every finding is ranked by real business impact — not CVSS scores nobody reads. You'll know what to fix this week vs. what can wait a month.

Fixes your developers can ship today

Every finding includes the exact fix — code snippets, config changes, commands to run. Hand it to your dev and it's resolved, not debated.

Your security review includes

  • Vulnerability report (10–15 pages)
    Structured, readable, shareable with your team or board
  • Severity ranking: Critical / High / Medium / Low
    Every finding rated and sorted by real-world business impact
  • Reproduction steps for every vulnerability
    Detailed enough that your developers can verify and understand each issue
  • Fix recommendations — code-level where possible
    Actual patches, config changes, and library upgrades — not just "fix your auth"

We cover

  • Authentication & session management
  • API security & exposed endpoints
  • Cloud configuration (AWS / GCP / Azure)
  • Secrets & credentials exposure
  • Third-party dependencies & supply chain
  • Data storage & encryption practices
  • Access control & privilege escalation
  • OWASP Top 10 vulnerabilities

Sample findings

This is what a real finding looks like

Every item in your report follows this format — severity labeled, reproducible, and immediately actionable.

Critical

JWT Secret Hard-Coded in Source Code

The application's JWT signing secret (JWT_SECRET=mysupersecret123) is hard-coded in src/auth/middleware.js:14 and committed to the public repository. An attacker can use this to forge valid authentication tokens for any user — including admins.

Reproduction

1. Clone repo from GitHub
2. Run node forge-token.js --user=admin
3. Use token in Authorization header → full admin access granted

Fix Recommendation

1. Rotate the secret immediately
2. Move to process.env.JWT_SECRET
3. Add .env to .gitignore
4. Audit git history & revoke exposed tokens

High

S3 Bucket Publicly Readable — User Data Exposed

The S3 bucket prod-user-uploads-v2 has public read ACL enabled. It contains 4,200+ user-uploaded files including documents with PII. Any unauthenticated request to the bucket URL returns a full directory listing.

Reproduction

1. curl https://prod-user-uploads-v2.s3.amazonaws.com/
2. Returns XML with 4,217 object keys
3. Any file directly downloadable via URL

Fix Recommendation

1. Set bucket ACL to private in AWS console
2. Enable Block Public Access at account level
3. Use pre-signed URLs with 15-min expiry for file access

Medium

No Rate Limiting on Password Reset Endpoint

The POST /api/auth/reset-password endpoint accepts unlimited requests per IP. An attacker can enumerate valid email addresses and spam resets, degrading user experience and leaking account existence.

Fix Recommendation

Add express-rate-limit: 5 requests/15 min per IP. Return identical response for existing & non-existing emails to prevent enumeration.

Your full report will contain every finding in this format — ranked, reproducible, and ready to hand to a developer.

How it works

From call to report in 48 hours.

Three steps. Designed to fit around a founder's schedule — not a security consultant's.

1

Free 30-minute call — tell us what you've built

Tell us your stack, what you've shipped, and what you're worried about. We know what questions to ask for each type of startup — SaaS, fintech, AI. No prep needed.

→ 30 minutes. Zero cost. Zero obligation.

2

We do the work — you keep building

You share read-only access to your repos and cloud console. We do the full review — scanning, manual analysis, testing — while you focus on your roadmap. No meetings, no back-and-forth.

→ 48 hours. You don't touch a thing.

3

Get your report + a walkthrough call

We deliver a clear, ranked report and walk you through every finding on a call. You leave with a prioritized fix list your team can start on immediately — nothing abstract, nothing vague.

→ Walk away knowing exactly what to fix first.

Real findings

What we've found for clients like you

These are representative findings from recent audits. Every one of them was unknown to the founder before we started.

Critical

Exposed API keys in production repository

A SaaS startup's Stripe live API key, database connection string, and AWS credentials were all committed to a public GitHub repo. The repo had been public for 6 months.

B2B SaaS · Series Seed · 3 engineers

Resolved within 4 hours of report delivery

High

Authentication bypass in admin dashboard

A fintech app's admin panel was protected by a frontend redirect — but the underlying API endpoints had no server-side auth checks. Any unauthenticated user could access all customer financial data directly.

Fintech · Pre-seed · 2 founders

Fixed before next investor demo

High

User data readable by any authenticated account

An e-commerce platform's order history API returned results based on a sequential integer ID in the URL with no ownership check. Any logged-in user could enumerate and read every other customer's orders.

E-commerce SaaS · Revenue-stage · 5 engineers

IDOR patched same day, no breach occurred

Why startups choose us

Why not just hire a security firm?

Traditional options weren't designed for startups. They're too slow, too expensive, or too unpredictable for a team at your stage.

Big Consultancy

  • $15,000–$50,000 minimum — before you've raised a Series A
  • 2–6 week turnaround — your roadmap won't wait
  • 100-page PDFs written for enterprise risk committees
  • Designed for compliance theater, not real vulnerability discovery
  • You'll never speak to the person who did the work

Bug Bounty Platform

  • No guarantee you'll get any useful findings
  • Unpredictable cost — budget planning is impossible
  • Months before meaningful coverage emerges
  • Scattered bug reports — no structured fix plan
  • Needs a dedicated team member to manage it
TetrisSecurity

TetrisSecurity

  • Flat fee: $299 or $499 — no surprises
  • 48-hour guaranteed turnaround
  • Structured, actionable 10–15 page report
  • Built specifically for startups at your stage
  • Direct access to the engineers doing the work

Why founders choose TetrisSecurity

48h
Turnaround, guaranteed
Results before your next sprint. Your team can start fixing the same week.
0
Security experience required
Written for founders and developers, not security teams. No translation needed.
$0
To find out if you need us
The first call is free. We'll tell you what we'd look for in your stack before you commit to anything.
Startup-native, not adapted
We built this for the attack surfaces that matter at your stage — APIs, auth, cloud config, secrets — not enterprise frameworks.
NDA-first, always
We sign before you share anything. Your code, your findings, and your vulnerabilities stay completely private.
Talk directly to the engineer
No project managers or sales reps. You work directly with the person who ran the review and found your vulnerabilities.

Pricing

Flat fee. No retainers. No surprises.

Priced for startups, not enterprise budgets. You know exactly what you're paying before you start.

MVP Security Review

$299 one-time

For pre-seed and seed startups with a live product

Full vulnerability scan (up to 3 services)
Cloud config review (AWS/GCP/Azure)
Secrets & API exposure check
Prioritized fix plan
60-min walkthrough call
Book Free Security Call
Most popular

Scale Security Review

$499 one-time

For seed/Series A startups with real users and investor scrutiny

Everything in Starter
Unlimited services / microservices
Auth & access control deep-dive
Dependency & supply-chain scan
30-day follow-up support included
Book Free Security Call

Going through a fundraise or enterprise sales process? Ask about our investor due diligence package. Starting at $299/mo for ongoing coverage.

Questions we get asked

We don't have a security engineer. Is this still useful? +

That's exactly who this is for. The report is written to be understood and acted on by a developer — not interpreted by a security team. Every finding comes with the fix, so your engineers can implement it directly without needing to research the vulnerability themselves.

Can I use this for investor or enterprise security due diligence? +

Yes. Many of our clients run a review before a fundraise or ahead of an enterprise sales process. The report demonstrates that you've proactively assessed your security posture — and gives you a clear remediation story if anything was found. Investors and enterprise buyers respond well to founders who've already done the work.

What access do you need, and is it safe to give? +

We sign an NDA before you share anything. We ask for read-only access to your code repositories and cloud console — you stay in full control throughout. We've never had a security incident related to client access, and we'll walk you through exactly what we need on the discovery call.

Is 48 hours genuinely the turnaround? +

Yes. The clock starts once you've shared access. Full report and walkthrough call delivered within 48 business hours — or your money back, no questions asked.

What if we're pre-launch and don't have users yet? +

Pre-launch is actually a great time to do this — you can fix things before anyone is exposed. We work with whatever you have: staging environments, early builds, or production code. We'd rather you find out before launch than after.

Only 5 audits per week · 2 slots remaining this week

Know where you stand before your users find out for you

Book a free 30-minute call. We'll tell you the top three vulnerabilities we'd look for in your specific stack — no charge, no obligation, no sales pitch.

If we can't find anything worth fixing, the call was still free. If we do — you'll have a prioritized fix list in 48 hours.

Book Free 30-Min Security Call →
Next availability: Thursday, May 1
·
30 minutes
·
Zero commitment