Your security engineering team, on call

Hackers never clock out. Neither does your security team.

The security engineering team you don't have to hire, for startups and companies around the world. Vetted ethical hackers test your website, app or API the way a real attacker would, hand you exactly how to fix what they find, and stay on the case every month or quarter as you ship.

  • check_circleFree plan to start
  • check_circlePay securely
  • check_circleEvery tester signs an NDA
  • check_circleMonthly or quarterly retesting
100+
Companies secured
1,200+
Vulnerabilities found
$100K+
Bounties paid
48h
Average response

Our researchers have found and reported security flaws to

What you get

Real experts, real problems, real fixes

No jargon and no false alarms. Just a clear list of what is wrong and how to put it right.

  • verified_user

    Real people, not robots

    Hand-picked ethical hackers test your product by hand. No automated scanner noise.

  • fact_check

    Only real problems

    Every issue is checked by our team and comes with proof that it actually works.

  • description

    A plain-English fix guide

    For each issue: how serious it is, what could go wrong and step-by-step how to fix it.

  • dashboard

    Your own dashboard

    Watch findings come in, chat with the tester and download the full report.

  • lock

    Private and confidential

    Only approved testers see your product, and every one of them signs an NDA first.

  • speed

    Fast results

    Testing starts within hours. The first finding usually lands within 24 hours.

What we can test

If it runs code or handles money, our researchers can test it.

  • Websites and web apps

    Logins, accounts, forms and everything your users click.

  • API security testing

    REST and GraphQL endpoints, authentication and data access.

  • SaaS products

    Multi-tenant apps, user roles and customer data isolation.

  • Azure security testing

    Azure tenants, identity, storage and network misconfigurations.

  • Shopify stores

    Checkout, discounts, store apps and customer data.

  • WordPress sites

    Themes, plugins, the admin area and user roles.

  • Android apps

    The app, what it stores on the phone, and its backend.

  • iOS apps

    iPhone and iPad apps, local storage and their APIs.

  • Windows and macOS apps

    Desktop software, installers and auto-updates.

  • Hardware and firmware

    Devices, firmware images and their debug interfaces.

  • Drivers and kernel

    Low-level system software and privilege boundaries.

  • Windows kernel exploit development

    Working proof-of-concept exploits for Windows kernel and driver vulnerabilities.

  • Payments and fraud

    Payment flows, pricing logic and abuse of offers.

  • Not on the list?

    Tell us what you build and we will tell you how we can test it.

How it works

Four steps. No paperwork.

1. Pick a plan

Start free with one website or API, or request a custom quote for deeper, authenticated testing.

About 1 minute

2. Get your quote and pay

For Pro and Enterprise, our team reviews your request and emails you a fixed quote, with a secure link to pay online.

Quote by email, shortly

3. Kickoff call

A short call with our team to confirm exactly what we will test, agree the timing and set up any access we need.

Short video call

4. We test, you fix

Our experts get to work. Each issue shows up on your dashboard with clear fix steps, and we email you when your full report is ready. Want regular checks? Make it continuous in one click.

Results within hours
Continuous security

The security team that never stops watching

A one-time audit checks your product on one day. But you ship new features all the time, and every release can open a new loophole. Keep your security engineering team on retainer: the same vetted testers, testing again on the schedule you choose, so nothing new ships unguarded.

  • history

    Monthly or quarterly

    Pick how often we test. Monthly suits teams that ship often; quarterly suits steadier products.

  • verified_user

    Same trusted testers

    Each round uses the same scope and the same vetted researchers, so nothing has to be explained twice.

  • description

    A fresh report every round

    Each round looks for new issues in what you have shipped since. Every report lands on your dashboard and we email you when it is ready.

  • payments

    Pay per round

    Each round has a clear price, agreed with you first. Nothing is charged automatically.

  • pause

    Pause or stop any time

    No long contracts. Tell us and we pause or stop your plan.

  • rocket_launch

    One click to switch

    Start with a single audit. When your report arrives, press Make it continuous and choose how often.

Get started for free After your first report you can make it continuous in one click.
Pricing

Start free. Go deeper when you need to.

Every plan uses hand-picked, vetted ethical hackers under NDA, and every finding comes with plain-English fix steps.

Basic

Free

Try Xfence on one website or API.

  • For websites and APIs only
  • One asset: a single website or a single API
  • Black-box testing: we test from the outside, like an attacker without a login
  • Verified findings with plain-English fix steps
  • Your own dashboard to follow every finding

Enterprise

Custom quote

For larger requirements across teams and products.

  • Everything in Pro, plus:
  • Many assets, products or teams in one plan
  • Hardware, desktop apps, drivers and low-level software
  • Scope, schedule and terms tailored to you
  • Continuous testing across everything you run

Pro and Enterprise: our team reviews your request and emails you a fixed quote with a secure link to pay online. Applicable taxes are extra.

Why us

Built by hackers who have done this for the world's biggest companies

Xfence is built by Vrseclabs. Our team has been recognised and rewarded by Google, Facebook, Apple, Twitter and others for finding security flaws in their products. Every tester on our team is personally reviewed before they can touch yours.

Payment Security
“XFence helped us identify a payment security issue that allowed a researcher to bypass parts of our payment flow and purchase items at an unintended price. The finding exposed a serious gap that our existing testing had missed.”
Tech Lead, E-commerce company
Internal Security
“The researchers discovered that internal tools were accessible in ways we had not intended. They were able to demonstrate access to systems that were not supposed to be publicly reachable, which helped us uncover and close a serious exposure.”
VP of Engineering, Technology company
API Security
“XFence helped us uncover a significant data exposure through an API endpoint. The amount of information that could be accessed was far beyond what we expected, and the finding gave our engineering team a clear path to fix the issue.”
Engineering Director, SaaS company

Shared with permission. Names are withheld.

Quick answers

Still unsure? Book a call or email hello@xfence.in.

How is my price worked out?expand_more
We start from industry-standard security testing rates for what you ask us to test and how big it is, and our team reviews every request before it is sent, so the price fits your project. You see the final, fixed amount in your email before you pay anything.
What does the free Basic plan include?expand_more
One engagement on a single website or a single API, tested black-box: our testers work from the outside, the way an attacker without a login would. You get every verified finding with plain-English fix steps on your dashboard. For authenticated testing, more assets or other kinds of products, request a Pro or Enterprise quote.
What is continuous security?expand_more
Instead of a single audit, we test your product again every month or quarter, with the same scope and testers, and send you a fresh report each round. You pay per round, nothing is charged automatically, and you can pause or stop whenever you like. You can switch to it with one click from your report email.
How do I pay?expand_more
Your quote email contains a secure payment link. You can pay securely online by debit or credit card. Once payment is confirmed, we set up a short kickoff call to agree the details, and then testing starts.
Isn't a free online scanner enough?expand_more
Scanners only spot known patterns and raise lots of false alarms. They can't think like an attacker. Our testers find the creative, real-world problems scanners miss, and every finding comes with proof that it is real.
Is my product and data kept private?expand_more
Yes. Your project is invite-only. Only testers we have personally approved can see it, and each one signs an NDA covering everything they see while testing.
Will testing break my website or app?expand_more
Testers only work on what you approve and follow the rules you set. Going outside that scope breaks our platform terms. If anything is sensitive, such as live payments or production data, tell us and we will plan around it.