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SaaS Penetration Testing: Protecting the Platforms Your Customers Trust

SaaS Penetration Testing: Protecting the Platforms Your Customers Trust

Packetlabs delivers human-led penetration testing across applications, APIs, cloud infrastructure, and identity systems to find real-world vulnerabilities that automated tools miss.

Get actionable findings that help protect customer data, support compliance, and strengthen customer trust.

SaaS Security Gets More Complex as You Scale

Growing platforms bring more systems to protect, greater customer scrutiny, and new security risks with every release.

Security Reviews Can Delay Deals Enterprise customers increasingly expect independent security testing. Vendor questionnaires, compliance audits, and procurement reviews can create last-minute pressure, especially when testing evidence isn't ready.

Every Release Introduces New Risks New features, integrations, and AI functionality can introduce vulnerabilities that previous assessments never covered. A penetration test from last year may no longer reflect the platform your customers use today.

Security Findings Compete With Product Priorities Engineering teams already have full backlogs. False positives, unclear severity ratings, and reports without practical remediation guidance create additional work and make it harder to prioritize the vulnerabilities that matter.

Lean Security Teams, Broad Attack Surface Most SaaS companies run security with engineers who also ship product. Multi-tenant applications, public APIs, SSO, mobile clients, and cloud accounts each require manual expert review to assess properly.

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What We Test Across Your SaaS Environment

From customer-facing applications to the cloud infrastructure behind them, Packetlabs identifies exploitable weaknesses across your platform. Every engagement is tailored to your architecture, attack surface, and security priorities.

Web Applications & Business Logic

Identify vulnerabilities in authentication, SSO, session handling, and complex application workflows. Our testers investigate how attackers could bypass controls, manipulate functionality, or gain unauthorized access.

APIs & Multi-Tenant Security

Test API authorization, role-based permissions, and customer data isolation. We investigate broken access controls, token misuse, and privilege escalation paths that could expose sensitive information across accounts or tenants.

Cloud Infrastructure & Identity

Assess AWS, Azure, and GCP environments for exploitable weaknesses in IAM roles, storage permissions, secrets, containers, and serverless functions. We validate attack paths that could lead to privilege escalation or unauthorized data access.

CI/CD Pipelines & Software Supply Chains

Evaluate build and deployment pipelines, secrets management, and development infrastructure for vulnerabilities that could expose sensitive credentials or compromise applications and production environments.

Mobile Applications & Connected Clients

Identify vulnerabilities in iOS and Android applications, including insecure data storage, authentication weaknesses, client-side controls, and the APIs and backend services they rely on.

AI & LLM-Enabled Features

Test AI-powered functionality for prompt injection, sensitive data leakage, insecure access controls, and tool or plugin abuse that could expose customer information or compromise application workflows.

Case Study: Helping HubSpot Strengthen Security Across Its Global Infrastructure

For a global SaaS platform like HubSpot, protecting customer data, maintaining strong access controls, and ensuring operational continuity are critical.

HubSpot partnered with Packetlabs to go beyond conventional penetration testing and understand what an attacker could actually achieve inside its infrastructure.

Using an assumed-breach approach, our testers started from a simulated compromised endpoint and investigated how far an attacker could progress, what information they could access, and how effectively existing defenses could limit the impact.

The engagement delivered validated security findings and actionable remediation guidance, helping HubSpot's team focus on meaningful risks and strengthen its global infrastructure.

HubSpot Quote

More Than a Pentest Report. Results Your Team Can Act On

Go beyond checking a compliance box. Get the security validation, actionable findings, and independent evidence your team needs to protect customers and keep your business moving forward.

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Understand whether attackers could bypass access controls, cross tenant boundaries, or exploit application logic to access sensitive customer information.

Case Study: Securing a Multi-Product Loyalty & Payments Platform

A SaaS provider operating loyalty, gift card, and retail fuel payment platforms for major brands needed independent security testing across multiple product lines. With enterprise customers expecting credible security evidence, the company needed a consistent approach to testing and reporting across its platforms.

Independent Testing for Each Product Each product received a dedicated testing scope, statement of work, and report, providing clearly documented security findings for individual product lines.

Manual Testing of Critical Workflows Our testers assessed gift card and payment workflows for business logic vulnerabilities and potential abuse that automated scanners may miss.

Application & Infrastructure Coverage Testing extended beyond customer-facing applications to the internal tooling and infrastructure supporting the platforms.

A Repeatable Testing Program Packetlabs supported a repeatable annual testing program across applications and infrastructure, with executive presentations and included retesting to help communicate findings and validate remediation.

 Securing a Multi-Product Loyalty & Payments Platform

Where We've Worked & What We've Solved

Loyalty & Payments SaaS

Enterprise, multi-product, multi-year program

Need: Several customer-facing loyalty and payment products each required independent testing, with internal tooling also in scope.

Solution: Delivered separate AppSec engagements per product line plus combined AppSec and infrastructure testing for internal tooling, followed by an annual program.

Customer Communications SaaS

Mid-market, AI products, growing footprint

Need: A growing platform needed its core application and infrastructure tested, then new AI products and an additional environment as the business expanded.

Solution: Delivered AppSec and infrastructure PT with the PTaaS dashboard, AI/LLM and cloud PT for its new AI products, and infrastructure PT of the added environment.

Learning Management SaaS

Enterprise, returning client, full-stack program

Need: An established platform needed to expand from application testing to coverage across mobile, cloud, corporate infrastructure, and staff.

Solution: Delivered AppSec, mobile, and AWS cloud PT, goal-based infrastructure PT with phishing, and an exposure validation assessment, with additional retests.

Operations Software, Regulated Sector

Regulated industry, recurring annual program

Need: A vendor whose software supports day-to-day operations in a regulated sector needed its application, APIs, and supporting infrastructure tested annually.

Solution: Delivered AppSec and API testing longside infrastructure, cloud, and identity security testing, delivered as a recurring annual program.

Education Communications SaaS

Web, mobile, and AI features

Need: A platform used by schools needed its web and mobile apps tested, then new AI functionality as it shipped.

Solution: Delivered AppSec and mobile testing, a follow-on AppSec and AI/LLM engagement, and ongoing threat monitoring.

Hospitality SaaS

Payments, multi-year expansion

Need: After an initial application test, the platform needed broader coverage across mobile, AI features, cloud, and its payment environment.

Solution: Delivered AppSec first, then expanded into mobile and AI, external infrastructure, cloud PT, and payment segmentation testing.

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SaaS Penetration Testing FAQs

What does a SaaS penetration test cover?

Testing can include web applications, APIs, multi-tenant environments, authentication systems, cloud infrastructure, and integrations. Packetlabs tailors each assessment to your architecture, business-critical systems, and security priorities.

See How We’d Test Your SaaS Platform

We'll walk you through how we've approached penetration testing for SaaS companies like yours, then discuss your applications, APIs, cloud environment, and security priorities.

Together, we'll identify what matters most and recommend a tailored testing scope, followed by a transparent proposal with clear pricing, timelines, and deliverables.