Testing by the OWASP guide
We follow the OWASP Web Security Testing Guide and cover each OWASP Top 10 risk, so coverage is documented.
The Problem
Scanners Can't Tell When One Customer Can Read Another's Orders
It shows up in code your team wrote: logins, roles, discounts, and APIs. Tools check known patterns, but logic flaws only surface when a person tries to abuse them.
01 · Clean scans
Your scanner came back clean, so the app shipped.
Testers work by hand, following the OWASP Web Security Testing Guide.
02 · Order leaks
Changing an order number in a URL shows another customer's address.
Access control between accounts gets tested with real logins and roles.
03 · Stacked discounts
Two discount codes stack that your rules said couldn't.
Checkout and discount abuse tests try to break the rules your app enforces.
04 · Open endpoints
An API endpoint returns every user's email.
Each finding comes with proof, a severity score, and a fix, then a retest.
Your scanner report came back clean, so the app shipped. Then a customer changes the order number in a URL and sees someone else's address. Another stacks two discount codes your rules said couldn't combine. A third finds an API endpoint that returns every user's email. None of this shows up in automated scans, because each request looks normal. You find out from a customer, a chargeback, or a stranger's email about your data.
We start by mapping what an attacker would target first: logins, roles, payments, and APIs. Then we test by hand, following the OWASP Web Security Testing Guide, and try to break the rules your app should enforce. Every finding comes with proof, a severity score, and the fix. When your developers finish, we retest, so you know the holes are closed instead of hoping.
Tested by hand, not just scanned
Tools find candidates, and testers prove which ones an attacker could really use.
Proof for every finding
Requests, responses, and screenshots show each issue is real before it reaches your developers.
Retest after your fixes
We check each fixed finding again and update the report you share.
Our Pen Test Process
From Signed Scope to Retested Fixes in Five Clear Steps
You sign off on what we test, which accounts we use, and when. Critical issues reach you right away, and the retest confirms each fix.
We agree the apps, domains, user roles, and APIs in scope, plus the testing window. You sign a written authorization and give us test accounts, and you get a fixed price before any testing starts.
What's Included
What You Get With Our Penetration Testing Services
Hands-on testing of the parts your team built, proof for each finding, and a retest after your fixes. Bigger plans add APIs, checkout abuse tests, and cloud settings.
Compare Options
DeveloperLook vs Automated Scanner vs Large Security Firm
A scanner is cheap and fast, and large firms sell penetration testing consulting services with formal accreditations. Each one fits a different need.
| Feature | DeveloperLookBest fit | Automated scanner | Security firm |
|---|---|---|---|
| Starting cost | From $1,450 | Free or monthly | Quoted per engagement |
| Manual testing | Every finding checked | None | |
| Business logic | Checkout and roles tested | Rarely caught | Tested |
| Proof of impact | Evidence per finding | Possible issues | Evidence per finding |
| Formal accreditation | Not accredited | None | Often available |
| Fix help | Fixes explained by developers | Generic advice | Report only |
| Retest | Rescan anytime | Varies by contract | |
| Best for | Stores and SaaS apps | A quick first check | Regulated enterprises |
DeveloperLook
Automated scanner
- Starting cost
- DeveloperLook: From $1,450Automated scanner: Free or monthly
- Manual testing
- DeveloperLook: Every finding checkedAutomated scanner: None
- Business logic
- DeveloperLook: Checkout and roles testedAutomated scanner: Rarely caught
- Proof of impact
- DeveloperLook: Evidence per findingAutomated scanner: Possible issues
- Formal accreditation
- DeveloperLook: Not accreditedAutomated scanner: None
- Fix help
- DeveloperLook: Fixes explained by developersAutomated scanner: Generic advice
- Retest
- DeveloperLook: Automated scanner: Rescan anytime
- Best for
- DeveloperLook: Stores and SaaS appsAutomated scanner: A quick first check
Projects We've Built
Ecommerce Projects We Have Built
Stores and apps we have designed and built. Custom checkouts, customer accounts, and APIs like these are what a pen test examines.
Fuison Fashion Ecommerce Website and Dashboard
- Fashion
- Dashboard
- E-commerce
Sefinix Furniture Ecommerce Store and Dashboard
- Furniture
- Dashboard
- E-commerce
Glamory Beauty & Makeup Ecommerce App and Dashboard
- Beauty
- Fashion
- E-commerce
Havenly Furniture Ecommerce Website
- Furniture
- E-commerce
- Dashboard
What Our Clients Say
What Clients Say After Launch
Feedback from teams we have built stores, apps, and APIs for.
We had a different kind of problem. People were visiting the store, adding products to their carts, and then disappearing before they finished the order. We had tried a few apps and made changes here and there, but nothing really seemed to solve the bigger issue. The team went through the shopping experience with us and pointed out things we hadn't really noticed ourselves. They cleaned up the cart and checkout flow, made the mobile experience much smoother, and helped us make the store feel easier to shop. I’m not going to pretend we fixed everything overnight, but it finally feels like the store is helping the sale instead of getting in the way of it.
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
1,000+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Work Culture
Why Teams Trust Us to Attack Their App
Testing a live app takes rules and restraint. These habits keep your data safe, your store selling, and every finding worth your developers' time.
Written authorization first
We test only the domains, accounts, and windows you sign off on. Nothing outside that scope gets touched, and you can pause testing at any time.
Test data, not your customers
We use test accounts and test orders wherever we can. Real customer data stays in your systems, and we delete our test credentials when the work closes.
Business logic gets the hours
Coupon rules, refunds, roles, and order edits are where scanners go quiet. We spend our testing time there, because that's where money and data leak.
Your store keeps selling
We don't flood servers or run denial-of-service attacks, which AWS's own pen testing policy prohibits. Your customers keep checking out while we test.
Findings you can reproduce
Every issue comes with the exact request, the response, and steps to repeat it. Your developers fix the cause instead of guessing at it.
Your report, your call
The report, evidence, and retest results belong to you, so share them with clients or auditors as you see fit. We don't publish or reuse your findings.
Overview
What do web application penetration testing services include?
DeveloperLook provides web application penetration testing services for stores, SaaS products, and custom apps. We test logins, roles, checkout logic, APIs, and cloud settings by hand, then deliver proof for each finding, a fix list, and a retest. Tests start at $1,450, take 1 to 3 weeks, and you own the report.
DEVELOPERLOOK
Project facts · Web Application Penetration Testing Services
- Service
- Manual web app pen tests with proof, a fix list, and a retest
- Typical timeline
- 1 to 2 weeks for one app, up to 3 weeks with APIs and cloud
- Platforms
- Shopify apps, WooCommerce, headless stores, SaaS apps, AWS, and Firebase
- Built with
- Burp Suite, the OWASP testing guide, Chrome DevTools, and Python scripts
- Experience
- 10+ years of development experience and 1,000+ shipped projects
- Post-launch support
- 30 days of support, 60 days on the full test
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $1,450 USD, fixed scope after a free scoping call
Reviewed 30 Sep 2026 by Saimul Islam
Good fit
SaaS products with customer logins
Your SaaS app has customer accounts and admin roles, and a buyer's security questionnaire just asked for your latest report, so you need a penetration testing service that delivers one.
Stores with custom checkout logic
Your WooCommerce or headless store runs custom discount rules, subscriptions, or a payment integration your own team wrote.
Shopify brands with custom apps
Your team built private Shopify apps and a custom storefront, and nobody has checked whether one customer can see another's orders.
Teams hosting on AWS or Firebase
You run on AWS, Firebase, or Azure and want cloud penetration testing services that cover storage buckets and access roles too.
Agencies facing client security questions
Your agency ships custom builds, and clients now ask for an independent security test before launch, so you want pen testing services under your brand.
Not a fit
Plugin and admin review
You mainly need to know which plugins, apps, and admin accounts are risky. Our Website Security Audit Services page covers that for less.
CREST-accredited test needed
You need a test from a CREST-accredited firm for a formal certification or tender. Accredited penetration testing companies are the right choice for that.
Data loss worries
Your worry is data loss from outages or mistakes, not attackers. Our Website Backup and Disaster Recovery page is the better fit.
Standard theme, no custom code
Your budget is under $1,450, or you run a standard theme with no custom code. A security audit finds more for the money.
Not sure we're the right fit?
Send a two-line brief. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for Web App Penetration Tests
These are starting points in USD. Your final price depends on how many apps, roles, and APIs are in scope, and you get a fixed proposal after a free scoping call.
For one web app or store with up to 2 user roles, tested and reported in about 2 weeks.
$1,450one-time, USD
- Free scoping call and signed authorization
- Hands-on testing by the OWASP guide
- Access control and business logic tests
- Evidence, CVSS scores, and a fix list
- One retest within 60 days
- 30 days of support
Recommended
For stores and SaaS apps with APIs, several user roles, and custom checkout or payment code.
$3,300one-time, USD
- Everything in Core Web App Test
- REST or GraphQL API testing
- Up to 4 user roles
- Checkout, discount, and payment abuse tests
- Custom Shopify app or plugin code review
- 30 days of support
For SaaS teams that need two apps or an app plus its cloud setup tested in one engagement.
$6,500one-time, USD
- Everything in App and API Test
- AWS, Firebase, or Azure settings reviewed
- Up to 2 apps or backends
- Two retests and a client summary letter
- Readout call with your developers
- 60 days of support
For Agencies
White-Label Pen Testing for Agencies and Studios
You own the client relationship. We test your client's app under your brand, write findings in your report template, and retest after your team's fixes. You answer security questionnaires without hiring a tester.
How the partnership works
White label: your client only ever sees your brand
- Your client
- You, the agency
- DeveloperLook
Share the brief
Send the app, its user roles, and the security questions your client asked.
- Client needs
- You share the details
- Details received
We propose and staff
You get a scope, an authorization form, and a fixed price per app.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
Test and hand off
We test, report in your template, and retest after your team's fixes.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
Stay client-facing
You present the report. We stay behind your brand on every call.
Predictable delivery
Fixed scope, testing window, and price agreed before any testing.
Senior engineering
Testers who also build Shopify apps, SaaS backends, and APIs.
Flexible capacity
Test one client launch or every release without a new hire.
The Right Technology for Your Project
Technology Stack
We test with standard security tools and our own scripts, on the frameworks, databases, and clouds your app already runs on.
Burp Suite
OWASP
Chrome DevTools
Python
Shopify
WooCommerce
Next.js
Node.js
Laravel
GraphQL
OpenAPI
PostgreSQL
MySQL
MongoDB
AWS
Cloudflare
Docker
Firebase
Supabase
FAQ
Frequently Asked Questions
Straight answers on cost, timing, test types, scans versus tests, SOC 2, checkout and Shopify apps, and retests.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Our tests start at $1,450 for one web app or store with up to 2 user roles. Adding APIs, checkout abuse tests, and a custom app code review costs $3,300. A full test with a cloud review and two retests starts at $6,500. Each price is fixed after a free scoping call.
Most web app tests take 1 to 2 weeks from kickoff to report, including about a week of hands-on testing. Tests with APIs and a cloud review take up to 3 weeks. The retest happens once your fixes are in, usually within a few days of your request.
It's an authorized attempt to break into your app or systems, so you learn which weaknesses an attacker could really use. Testers work by hand with tools like Burp Suite, chain small issues together, and prove each finding with evidence. You get a report with severity scores, fixes, and a retest, which a vulnerability scan alone can't give you.
The main types are network, web application, API, mobile app, cloud, wireless, and social engineering tests. Each one targets a different attack surface. We focus on your web apps, their APIs, and the cloud settings behind them. For network, wireless, or physical tests, a specialist penetration testing company is the better fit.
A vulnerability scan lists possible weaknesses from known patterns, while a pen test proves which ones an attacker can actually use. Testers chain small issues, abuse business rules, and try to reach other users' data. If a scan and an audit cover your risk, we'll tell you before we quote.
Yes, wherever your own code controls them. We try price tampering, coupon stacking, negative quantities, and skipped payment steps on custom checkouts and payment integrations. On Shopify, the hosted checkout belongs to Shopify, so we test your apps, discounts, and extensions around it, and the order data they touch.
Yes, custom Shopify apps, theme code, and headless storefronts are a core part of our testing. We check OAuth and session handling, webhook verification, access scopes, and whether one shop or customer can reach another's data. Shopify's own platform stays out of scope, and we test on a development store when one is available.
SOC 2 doesn't strictly require one, but most auditors expect a recent pen test report. The AICPA criteria list it as one way to evaluate your controls (CC4.1), and independent penetration test services give your auditor that evidence. If you also handle cards, PCI DSS asks for testing at least every 12 months and after significant changes.
Yes, every plan includes a fix list and a retest. Each finding has a severity score, proof, and the change that closes it. After your developers finish, we retest every fixed finding and send an updated report you can show clients as proof the issues are closed.
Run a pen test at least yearly, plus after any big change to logins, payments, or APIs. Teams that ship weekly often test before big releases instead. Between tests, an audit or an automated scan catches the easy problems early, so the next test can focus on logic.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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