FussyBug brings absolute certainty to AI-assisted software. We intercept hidden security holes and structural flaws across your entire codebase, verifying every fix before your product ever meets a real user.
1import Stripe from "stripe";2const stripe = new Stripe("sk_live_51Hx…9fQ");FB-0134export async function POST(req) {5 const { userId, price } = await req.json();FB-026 const { data } = await db.from("orders")7 .select("*").eq("user_id", userId);8 const s = await stripe.checkout.sessions.create({ /* unit_amount: price */ });FB-039 return Response.json({ url: s.url, data });10}
Seamlessly integrating into the environments where tomorrow’s software is built.
AI builds software faster than teams can read it. It looks right, runs smoothly, and feels complete. Until your first real user, or your first real adversary, arrives.
Where raw speed meets rigorous engineering. Advanced automated scanning paired with an exhaustive, line-by-line human evaluation of security, permissions, data layers, and core business logic.
Every vulnerability identified, resolved, and aggressively re-tested before launch. You get code you can stand behind, backed by a definitive report your team, investors, and customers can trust implicitly.
of AI-generated code samples contained security flaws.
A recent global evaluation spanning more than 100 AI models revealed a sobering truth: nearly half of the AI-generated code tested introduced security flaws that leave systems open to exploit. Speed should not compromise safety. FussyBug bridges the gap, turning vulnerable code into production-grade infrastructure.
Source: Veracode, 2025 GenAI Code Security ReportAI assistants build at incredible speed, but they lack context. We map out and eliminate the critical vulnerabilities automated code leaves behind, and the ones standard scanners miss entirely.
API keys, tokens, and production passwords buried deep in code repositories, config files, Git histories, and client-facing browser bundles.
Missing row-level security, exposed Supabase or Firebase configurations, and unvalidated database queries that implicitly trust the client.
Broken login workflows, missing server-side role validation, and privilege escalation vulnerabilities that expose private user data.
Client-side tampered pricing, skipped workflow steps, uncapped transaction refunds, and execution paths that breach your core business rules.
Integration of entirely non-existent, abandoned, or heavily compromised third-party packages ripe for supply chain hijacking.
SQL breaches, advanced prompt injections, unvetted file uploads, and cross-site scripting gaps left open to exploit.
Application failures that fail silently, exposed stack traces that leak architecture secrets, and codebases devoid of real-time production alerts.
Critical, unmonitored deployment paths or superficial, AI-generated unit tests that greenlight builds without verifying real outcomes.
Engineered to secure applications built with today’s leading platforms and frameworks.
No hidden fees. No hourly billing. Just a clear, fixed commitment agreed upon before we write a single word.
A high-velocity evaluation to identify the critical vulnerabilities that sink new applications.
An exhaustive security and structural logic evaluation culminating in an authoritative launch decision.
Ongoing vigilance for new pull requests, seamlessly maintaining security before code ever merges.
Immediate, critical intervention for systems experiencing active crashes, data leaks, or regulatory audit failures.
All prices are in US dollars and exclude applicable taxes. Audits are billed 50% on signing and 50% on delivery. Larger codebases are quoted individually.
A streamlined, deep-dive evaluation designed to fit perfectly into your launch timeline.
We define your architecture, execute a comprehensive NDA, and establish secure, read-only access. Alignment begins immediately.
Advanced automated tools map out the baseline. Then, our senior security architects step in, manually inspecting every critical line of code to catch what software misses.
You receive an exhaustive, transparent report detailing severity, exact code locations, proofs of concept, and remediation steps, all walked through over a live engineering review.
Your team implements the fixes. We re-test your codebase to verify compliance and issue your official FussyBug Gate Pass for a flawless, secure release.
Each issue comes with a severity, the exact file and line, how to reproduce it, and a suggested fix. Below is an excerpt from an example report.
| ID | Severity | Location | Finding | Suggested fix |
|---|---|---|---|---|
| FB-001 | CRITICAL | supabase/migrations/002.sql | Row-level security is off on the bookings table. Any signed-in user can read and edit every booking. | Enable RLS and add a policy limiting rows to the owner's user ID. |
| FB-004 | CRITICAL | lib/admin.ts:12 | Service role key is imported in a client component and shipped to the browser. | Move admin calls to a server route; rotate the leaked key. |
| FB-009 | HIGH | package.json | Dependency "react-date-utils-pro" does not exist on npm. Name could be registered by an attacker. | Remove it and use the maintained date library already installed. |
| FB-012 | HIGH | app/api/cancel/route.ts:31 | Cancellation refund ignores the 24-hour policy in the spec. Users can cancel at any time for a full refund. | Check booking time on the server before issuing refunds; add tests. |
| FB-015 | MEDIUM | tests/booking.test.ts | 14 of 16 tests only check that functions return something, not that the result is correct. | Rewrite with real assertions for pricing, overlap and cancellation rules. |
Example data for illustration only. Full reports include proof of each issue, steps to reproduce, and a one-page summary for founders and investors.
Your product is your most valuable asset. We handle it with absolute reverence.
We sign a strict non-disclosure agreement before we look at a single line of your code. Protection begins before the work does.
We never ask for write permissions to your repository or live production systems. Your original code remains untouched and entirely yours.
Once our audit is complete, your code is systematically purged from our systems, and we provide formal, written verification of its deletion.
While automated tools help us move fast, they lack intuition. Every single vulnerability in your final report is verified and signed off by an expert security engineer.
FussyBug is an independent quality and security collective driven by a singular, intense passion: protecting businesses navigating the wild frontier of the AI era. We are obsessed with engineering integrity.
We believe that while AI tools can accelerate human creativity, nothing can replace the deep intuition, critical thinking, and sharp eye of seasoned security specialists. Our team lives to bridge the gap between rapid-fire AI generation and rock-solid, production-ready software.
We do not just find issues. We care deeply about the stability, safety, and ultimate success of the applications you bring to life.
We provide meticulous audits of software written by AI coding tools before it ever touches a real customer.
AI assistants have unlocked incredible power, enabling a single founder to build in a weekend what used to take an entire engineering team months to complete. However, this speed makes it shockingly easy to ship code that no human has actually read or fully understood. We exist to be that critical, careful second pair of eyes standing firmly between raw AI outputs and your live production environment.
Because we are an entirely independent firm, we do not develop software and we do not sell security products. Our only objective is to analyze your codebase and deliver plain, accurate truths about what is broken and exactly how to fix it.
AI is fundamentally changing how the world builds software. It allows small teams to turn big ideas into reality in days instead of months. That is incredibly powerful.
But speed without oversight leaves a footprint. Every single week, software goes live with hidden flaws: exposed API keys, unprotected databases, and compromised workflows. When those apps fail, it is the users who trusted them with their data who pay the price.
We started FussyBug to close that gap. Our mission is simple: empower your business to move at the speed of tomorrow, without putting your customers, your data, or your reputation at risk today.
We take every line of code personally. When we sign off on your product, it is because we would trust it with our own lives. And our own data.
Built to ensure speed never comes at the cost of security.
Finding the vulnerabilities before your users ever encounter them.
Blending powerful automated insights with deep, deliberate human expertise.
No. It is deep human insight, amplified by technology. Anyone can run an automated tool. Scanners catch common bugs, but they miss logical errors, structural flaws, and unique business logic vulnerabilities. We use advanced scanning as a baseline, but the real value is our seasoned security engineers who manually dissect your code line by line.
Nothing is completely unhackable, but we make it drastically harder to breach. In security, anyone promising 100% safety is not telling the truth. What we do guarantee is an exhaustive, rigorous evaluation that eliminates the critical, low-hanging fruit and complex logical gaps that automated tools and malicious actors look for first.
Only what is absolutely necessary. We need read-only access to your code repository. We treat your intellectual property with the exact same level of security and confidentiality that we demand for our own. No data is stored longer than required, and your codebase never leaves our secure environment.
We do not write the code. We give your team the precise blueprint to perfect it. Because we are an independent review team, we do not patch the code directly. Instead, we provide clear, actionable, step-by-step remediation guidance. This ensures your development team understands the flaw and can implement the fix permanently.
Completely. We believe true expertise means explaining complex risks simply. Our reports are split into two clear sections: an executive summary tailored for founders to understand business impact and risk, and a detailed engineering brief with code snippets and technical steps for developers.
One to two weeks. True security takes focus, but it should not slow your momentum. Most deep-dive audits are fully completed, reviewed, and delivered within 7 to 14 days, keeping your product launch on track and secure.
Get an exhaustive, independent security audit of your AI-generated code. Most deep dives are fully completed and delivered within 1 to 2 weeks.
Tell us about your application and your launch timeline. Our team will review your architecture and respond within one business day with a clear scope and a fixed, transparent investment.
Direct ContactLast updated: October 16, 2026
These Terms of Service ("Terms") govern your use of the fussybug.com website and any audit, review or advisory services provided by FussyBug ("FussyBug", "we", "us"). By using this website or engaging our services, you agree to these Terms.
FussyBug provides reviews of software source code, applications and related systems, with a focus on code produced with AI coding tools. The exact scope, timeline, deliverables and fee for each engagement are set out in a written proposal, statement of work or order form ("Order") agreed between you and us. If an Order conflicts with these Terms, the Order applies.
An audit is a professional, best-effort review carried out within an agreed scope and time. No audit can identify every defect or vulnerability. Our reports describe the issues we found during the engagement and are not a guarantee, warranty or certification that your software is secure, error-free or compliant with any law or standard. A "gate pass" means that the critical issues identified in our report were re-tested and verified as fixed at the time of re-testing.
Our services are technical in nature and do not constitute legal, regulatory or compliance advice.
Fees are stated in US dollars and exclude applicable taxes. Unless an Order says otherwise, one-time audits are invoiced 50% on signing and 50% on delivery of the report; monthly services are invoiced in advance on the first day of each month; and emergency engagements are invoiced in full before work begins. Invoices are due within 14 days. We may pause work on overdue accounts.
We treat your source code, systems, data and business information as confidential. We use it only to perform the services, share it only with personnel and vetted contractors bound by written confidentiality obligations, and delete copies of your code at the end of the engagement unless you ask us in writing to retain them. Where requested, we will sign a separate non-disclosure agreement before receiving access.
You keep all rights in your code and systems. On full payment, you own the reports and test cases we deliver to you. We keep the right to use our general know-how, methods and tools, and to use fully anonymized, non-identifying findings to improve our services.
To the maximum extent permitted by law, FussyBug's total liability arising out of or relating to any engagement is limited to the fees you paid for that engagement in the twelve months before the claim. We are not liable for indirect, incidental, special or consequential damages, including lost profits, lost data, security incidents caused by third parties, or business interruption.
The content on this website is provided for general information. Examples, sample reports and figures shown on this website are illustrative only. You may not use this website in a way that is unlawful or that interferes with its operation.
Either party may end an engagement with written notice. You will pay for work performed up to the date of termination. Monthly services may be cancelled at the end of any minimum term stated in your Order.
These Terms are governed by the laws of the State of [State], United States, without regard to its conflict-of-law rules.
We may update these Terms from time to time. The "Last updated" date above shows when they last changed. Changes do not affect Orders already signed.
Questions about these Terms can be sent to legal@fussybug.com.
Last updated: October 18, 2026
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Last updated: October 16, 2026
This Privacy Policy explains how FussyBug ("we", "us") collects, uses and protects personal information when you visit fussybug.com, contact us, or become a client.
We do not sell your personal information, and we do not use the code you share with us to train AI models.
Where the GDPR applies, we process personal information to take steps at your request before entering a contract, to perform a contract, to meet legal obligations, and for our legitimate interest in running and securing our business.
We share information only with service providers that help us run our business, such as email, hosting, payment and accounting providers, and with vetted contractors working on your engagement under written confidentiality obligations. We may also disclose information where required by law.
We serve clients in the United States and around the world, so information may be processed in the United States. Where required, we use appropriate safeguards such as standard contractual clauses.
We keep enquiry information for up to 24 months unless you become a client. We keep client business records for as long as the law requires. Copies of client source code are deleted at the end of each engagement unless you ask us in writing to keep them.
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Depending on where you live, you may have the right to access, correct, delete or receive a copy of your personal information, to object to or limit its use, and to withdraw consent. California residents have rights under the CCPA, including the right to know and delete. To make a request, email privacy@fussybug.com. You may also complain to your local data protection authority.
We protect information with access controls, encryption in transit, read-only access to client code wherever possible, and deletion of client code after each engagement. No method of storage or transfer is completely secure, but we work hard to protect what you share with us.
We may update this policy from time to time. The "Last updated" date above shows when it last changed.
For privacy questions or requests, contact privacy@fussybug.com.