2026-07-23 · Company
Why we started Faultline Security
TL;DR We built Faultline to deliver senior-led pentests at startup-friendly fixed prices, with reports engineers can use, in under two weeks from scoping to delivery.
The opening story below is a composite based on patterns we have seen. It is not a single named case study.
Last year, a founder we know lost a Series A.
Not because the product was broken. Not because the metrics were off. Because when the lead investor asked for a penetration test report, they didn't have one. The round didn't die that day. But the trust was gone. Three months later, so was the deal.
We had seen this pattern before. A startup ships fast, builds something worth protecting, lands real customers. Then a single question from an investor, an enterprise buyer, or a compliance auditor stops everything: "Can you share your most recent pentest report?"
There is no report. There has never been a report. Not because the founders didn't care about security. Because penetration testing, until recently, was built for a different kind of company.
The AI question everyone is asking
Before we explain what we built and why, we need to address the obvious!
Yes, AI can test a lot of things. It can scan your codebase, flag known vulnerability patterns, generate payloads, and surface a list of potential issues faster than any human team. It's genuinely impressive, and we use these tools ourselves.
But here is what gets left out: a model printout is not the same as evidence a buyer, CPA, or certification body will file away.
SOC 2, ISO, and PCI expect a named firm, a defensible methodology, and human accountability for the work. For GDPR, Article 32 is about appropriate measures and proof they work, not a single "pentest" line item like PCI Requirement 11, but in practice you still need evidence that stands up in review.
Not a model on its own. Not an agent on its own. A tester who can explain scope, limitations, and methodology. The reason is simple: accountability.
When something goes wrong, you need someone who can stand behind their findings, explain their methodology, and be held professionally responsible for what they missed.
Will AI change this? Probably, eventually. The frameworks will catch up. The tooling will improve. But your next investor meeting, your next enterprise deal, your next audit: those are happening now!
Overpriced, overdue, and unreadable
We kept running into the same problems.
Penetration testing firms built for enterprise clients were charging EUR 15,000 to EUR 40,000 for engagements that took 6 weeks to complete. The reports they produced were 80-page PDFs written for auditors, not for the engineering teams who had to fix the findings. Startups either couldn't afford it, couldn't wait that long, or walked away with a document no one on the team could use.
At the same time, the demand was real and growing. Compliance requirements were expanding. Enterprise buyers were adding security questionnaires to their procurement process. Investors were starting to ask for pentest reports in due diligence. The startups that had a report were moving faster. The ones that didn't were losing deals, or worse, finding out the hard way that something in their product should have been caught earlier.
We built Faultline Security to close that gap.
How we approach this differently
We are a boutique penetration testing firm, and we are deliberate about staying that way.
Every engagement is handled by senior testers. No offshore teams working through a checklist. People who understand business logic, authentication flows, and what an attacker would actually target in your specific product.
We use AI, and we are transparent about it. It handles reconnaissance, payload generation, and first-draft report writing. That is part of how we keep pricing at EUR 3,000 instead of EUR 30,000 and turnaround under 2 weeks instead of 6.
The reports we deliver are structured to be used, not filed. An executive summary your leadership can read in ten minutes. Technical findings your engineers can pick up and fix without a meeting. A working proof-of-concept for every finding. An attestation letter your auditor will accept.
Fixed pricing. No call required to get a proposal. No six-week wait to get started.
Who this is for
If you are building a SaaS product, if you handle customer data, if you are heading into a fundraise or an enterprise sales cycle: a penetration test is no longer optional. It is the thing that unlocks the next stage.
We built Faultline Security for founders and teams who move fast and need security that keeps up. The scoping form takes 2 minutes. You get a fixed-price proposal within 24 hours.
If a pentest is on your radar, start here: https://faultlinesec.com/scope
Quick questions
What makes Faultline different from a large consultancy?
Fixed scope and price, no account-manager layer, senior testers on every engagement, and a report format built for engineering teams, not only auditors.
Who is Faultline for?
Startups and SaaS teams that need a credible pentest for investors, enterprise buyers, or compliance, without a six-week enterprise procurement cycle.
How do I get started?
Two minutes on the scoping form. You receive a fixed-price proposal within 24 hours.