Application Security Testing
Find the vulnerabilities before someone else does.
We provide application security testing and VAPT: web, API and mobile app testing against common vulnerability classes, configuration and dependency review, clear reports with fix guidance, and retesting after remediation.
- Web, API and mobile
- Clear reports
- Retesting
Free 30-minute call with a senior specialist. Reply within one business day. Based in Jaipur, working with businesses across India.
- Discovery callFree 30 minutes with a senior specialist
- Scoped first phaseWritten scope, timeline and fixed price
- Build with weekly demosWorking software you can see every week
- Launch and supportGo-live with your team ready, then ongoing support
What is application security testing and VAPT?
Vulnerability assessment and penetration testing (VAPT) checks applications and infrastructure for exploitable weaknesses and reports them with fixes. Stack18 tests web, API and mobile applications against common vulnerability classes, agrees scope and rules of engagement in writing, and retests after fixes.
Last reviewed 30 October 2026 by the Stack18 delivery team in Jaipur. Security and AI governance · Pricing · About Stack18
| What it covers | Scope and rules; Web and API testing; Mobile and configuration; Reporting; Retest and support. |
|---|---|
| Typical first step | Discovery Sprint: 2 weeks, fixed price. |
| Build route | Fixed-scope first release: agreed in discovery; fixed price after discovery. |
| Long-term option | Transformation Pod: 12–36 months, annual contract. |
| Measured by | Critical and high findings; Time to fix; Retest pass rate; Coverage of APIs. Each against an agreed baseline. |
| Governance | Human approval at 5 governance gates before anything reaches production. NDA available on request. |
| Delivery team | Based in Jaipur, India. A senior specialist replies within one business day. |
You need this when…
Tap the ones that apply to you.
Application Security Testing, end to end.
Each capability is delivered by the same team on the Agentic SDLC, with your approval at every critical step.
Scope and rules
Safe, agreed testing.
- Written scope and permission
- Test windows
- Data handling rules
Web and API testing
Cover the common risks.
- Authentication and access control
- Injection and input handling
- Business logic checks
Mobile and configuration
Beyond the code.
- Mobile app checks
- Cloud and server configuration
- Dependency review
Reporting
Useful to developers.
- Severity-ranked findings
- Reproduction steps
- Fix guidance
Retest and support
Close the loop.
- Retest after fixes
- Closure report
- Secure coding advice
A typical engagement, step by step.
Senior people lead every phase. Specialised AI agents on the Agentic SDLC handle the repetitive work, and nothing ships without your approval.
Discovery
Map how application security works today, the systems and data involved, and agree the first measurable outcome.
Design
Design the workflows, roles, integrations and approval points for application security.
Build in weekly demos
Your team sees working application security software every week, with changes agreed in the open.
Launch and support
Data migration, training, go-live support and a measured 30-day review against the baseline.
Start small. Scale when it works.
Every engagement begins with a short, fixed-price step so you can judge the fit before committing further. See pricing.
Discovery Sprint
Teams deciding scope and priorities before they commit.
- Duration
- 2 weeks
- Pricing
- Fixed price
- Scoped plan and timeline
- Team and fixed price
- Process map or prototype
Fixed-scope first release
Teams that know what they need built.
- Duration
- Agreed in discovery
- Pricing
- Fixed price after discovery
- Written scope and acceptance criteria
- Weekly demos
- Handover with documentation
Transformation Pod
Multi-system programmes that run for years.
- Duration
- 12–36 months
- Pricing
- Annual contract
- Dedicated cross-functional team
- Quarterly business reviews
- One accountable partner
What we have shipped, and what a typical engagement looks like.
Delivered projects link to the full case study. Illustrative scenarios describe typical engagements and are not named client results.
SaaS company with an enterprise customer
- Challenge
- Customer required a recent penetration test report.
- What we do
- Scoped web and API test with a retest after fixes.
Scoped in a 2-week sprint
Free application security review
Tell us where application security hurts most. We map what to fix first, whether ready-made or custom fits, and a realistic first step.
- Where to start and why
- Ready-made vs custom view
- Indicative timeline
We agree targets before we start.
Every engagement has a baseline and a target on the measures that matter to you, reported at every read-out.
Application Security Testing questions.
Are you CERT-In empanelled?
This page does not claim empanelment. If a buyer requires a specific empanelled auditor, they should choose accordingly.
Do you test production?
Only with written permission and agreed safeguards. We usually prefer a staging environment.
What standards do you follow?
We follow established practices such as the OWASP guidance. We confirm the approach in scoping.
Will you fix the issues?
We can advise and, if engaged, help fix them.
How long does it take?
It depends on size. A scoping call gives a fixed-price estimate.
Guides, comparisons and proof.
Mobile App Development Cost in India: Guide
What drives mobile app cost in India: features, platforms, offline use, integrations and launch.
Read →CompareReady-Made vs Custom Software: How to Choose
Ready-made systems go live in weeks at a fixed price.
Read →GuideSoftware Development Cost in India: What Drives It
What drives custom software cost in India, how fixed price, time and materials and dedicated teams differ, and…
Read →TrustSecurity, Data Protection & AI Governance
How Stack18 keeps your data and AI work secure: human approval gates, your environment, audit trails, no model…
Read →Let's scope your Application Security Testing project.
Tell us where you are and where you want to be. A senior specialist will reply within one business day with next steps.
- Free 30-minute consultation
- Indicative estimate after the call
- NDA available on request