A startup usually needs a penetration test once it handles customer data or is asked to prove its security in a sale or audit. A pen test simulates real attacks to find exploitable weaknesses in your applications, network and cloud, then rates each finding by severity so you know what to fix first.
When does a startup actually need a penetration test?
The honest answer is not “as early as possible”. A penetration test is worth paying for once you have something real to test and a real reason to test it. For most startups that point arrives when you are storing or processing customer data, when an enterprise buyer asks for evidence of security testing, or when a framework such as SOC 2 or ISO 27001 expects you to assess technical vulnerabilities.
Before that, your money is usually better spent on the basics: fixing misconfigurations, enforcing access controls, patching dependencies and running automated scanning. A penetration test finds the exploitable gaps that remain after the obvious ones are closed. Testing a product with no authentication, no monitoring and unpatched libraries tells you what you already know.
A good trigger to book a test is a meaningful change to what an attacker can reach: a new public-facing application, a significant feature release, a move to a new cloud environment, or a contract that requires proof of testing. Many teams then settle into testing once a year and after any major change, which is also what most compliance frameworks expect.
What are the main types of penetration test?
“Penetration testing” is not one activity. The right scope depends on what you have built and what you are trying to protect. For most SaaS startups the relevant types are web application, network, cloud and API, with mobile added if you ship an app.
- Web application testing looks for flaws in the software your users log into: broken access controls, injection, authentication weaknesses and business-logic errors. The OWASP Testing Guide is the recognised reference for how this work is done.
- Network testing probes your infrastructure. External testing targets what is reachable from the internet; internal testing assumes an attacker is already inside and asks how far they can move.
- Cloud configuration testing examines how your AWS, Azure or GCP environment is set up: identity and access management, storage permissions, network controls and the misconfigurations that cause most cloud incidents.
- API testing targets the interfaces behind your product and integrations, where authorisation gaps and excessive data exposure are common and easy to miss from the front end.
A competent provider works to a recognised methodology rather than running a scanner and exporting the output. The OWASP Testing Guide and the Penetration Testing Execution Standard (PTES) both set out how a thorough test should be scoped and carried out, which is a useful thing to ask about before you sign.
What drives the cost of a penetration test?
There is no single price for a penetration test, and any figure quoted without seeing your environment is a guess. Cost is driven by scope and effort rather than a fixed rate, so the same provider will quote very different numbers for two different products.
The main factors are the size and complexity of what is being tested, the number of applications, APIs and environments in scope, the type of test (a focused web application test is smaller than a full external and internal network engagement), and the depth of testing, since manual testing by an experienced tester costs more than automated scanning but finds the issues that matter. The amount of manual effort a thorough test requires is usually the largest variable.
One thing worth budgeting for is the retest. After you fix the findings, a retest confirms the fixes actually worked, and it is the retest report, not the original, that buyers and auditors usually want to see. Check whether a retest is included in the quote or charged separately.
Which compliance frameworks require penetration testing?
For many startups the trigger for a first penetration test is a compliance requirement or a customer security review rather than a security decision made in isolation. Several frameworks expect regular technical testing as evidence that you assess and manage vulnerabilities.
- SOC 2 expects you to identify and manage vulnerabilities, and auditors routinely accept a recent penetration test as evidence for the relevant criteria.
- ISO 27001 requires you to manage technical vulnerabilities and to test your controls; a penetration test is a common way to demonstrate both.
- DORA, which applies to financial entities and their critical ICT providers in the EU, sets explicit expectations for regular testing of digital operational resilience.
- Customer security reviews are often the strictest test of all. Enterprise procurement teams increasingly ask for a recent penetration test report before they sign, regardless of which certifications you hold.
If your reason for testing is compliance, scope the test so the report answers the question your auditor or customer will ask. A test that covers the wrong systems satisfies neither. If SOC 2 is the driver, our SOC 2 implementation work covers where testing fits in the wider programme.
How do you choose a penetration testing provider?
The quality of a penetration test depends almost entirely on the people doing it, so the choice of provider matters more than the line item. A few questions separate a real engagement from an automated scan with a logo on the cover.
- Ask what methodology they follow. A credible answer references the OWASP Testing Guide, PTES or equivalent, and includes manual testing rather than scanning alone.
- Ask to see a sample report. It should explain each finding, rate it by severity, often using CVSS, and give remediation guidance a developer can act on, not just a list of scanner output.
- Confirm the testers’ experience and that they hold recognised certifications. You are buying their judgement, not their tooling.
- Check that a retest is included or priced, so you can prove the issues were fixed.
- Make sure scope and rules of engagement are agreed in writing before any testing starts.
Atoro provides penetration testing services covering web application, network, cloud, API and mobile testing, with severity-rated findings, clear remediation guidance and retesting to confirm fixes. The harder part is usually what happens after the report lands, which we cover in how to interpret and act on penetration test results.
Penetration testing for startups FAQs
What is penetration testing?
Penetration testing simulates real-world attacks on your applications, network and cloud to find vulnerabilities that an attacker could exploit. Testers use manual techniques alongside automated tools, then rate each finding by severity so you can prioritise what to fix.
When does a startup need a penetration test?
Usually once you handle customer data, an enterprise buyer asks for evidence of security testing, or a framework such as SOC 2 or ISO 27001 expects you to assess technical vulnerabilities. Before that, the basics, such as access control and patching, are a better use of budget.
How often should a startup run a penetration test?
A common pattern is once a year and after any significant change, such as a major feature release or a move to a new cloud environment. Most compliance frameworks expect testing on roughly that cadence.
What types of penetration test are there?
The common types are web application, external and internal network, cloud configuration, API and mobile testing. Which ones you need depends on what you have built and what you are trying to protect.
How much does a penetration test cost?
There is no fixed price. Cost is driven by the size and complexity of what is tested, the number of applications and environments in scope, the type of test and the depth of manual testing involved. A quote requires someone to look at your environment first.
Does SOC 2 or ISO 27001 require penetration testing?
Neither names penetration testing as a mandatory line item, but both expect you to assess and manage technical vulnerabilities. A penetration test is a widely accepted way to provide that evidence, and auditors routinely accept a recent test.
What is a penetration test retest?
A retest re-examines the issues found in the original test after you have fixed them, to confirm the fixes worked. The retest report is often what buyers and auditors want to see, so check whether it is included in your quote.
How are penetration test findings rated?
Findings are rated by severity, often using the Common Vulnerability Scoring System (CVSS), so you can prioritise remediation. A good report explains each finding and gives guidance a developer can act on, not just raw scanner output.