Free Web App Security Testing for Solo Founders and Small Teams

Why security testing is hard for solo founders and small teams

Security is not something most solo founders or small dev teams skip because they don't care. They skip it because every option available assumes resources they don't have: a dedicated security engineer, a pentesting budget of €5,000–€20,000, or the time to read through a 200-page vulnerability scanner report and figure out what's actually exploitable.

The result is a predictable pattern: security gets deferred until a customer asks for it during a sales call, until something breaks, or until the team is large enough to justify the cost. By that point, vulnerabilities have been in production for months.

Attack simulation changes the calculus. Instead of flagging hundreds of theoretical issues, it attempts actual exploit paths and shows you what succeeded — with HTTP-level proof. Three runs a month is enough to cover your most critical flows without adding a line item to the budget.

What the Starter plan includes

The Starter plan is permanently free — no trial period, no credit card required, no feature degradation after 14 days. Here's exactly what you get:

• 3 single-target simulations per month — one simulation per URL, reset every billing cycle
• 1 team seat — full access for one user, no seat limits hit until you add collaborators
• 1 URL target per run — focused simulation against a specific endpoint or flow
• Multi-step attack chains — the simulator attempts real account takeover and unauthorized access paths, not just individual probes
• Proof of impact with reproduction steps — every confirmed finding includes the HTTP request sequence that exploited it
• Safety-first defaults — built-in rate limits and scope enforcement prevent the simulation from touching anything outside the defined target
• PDF export — download a structured report you can share with a co-founder, investor, or client
• 30-day scan history — results are retained for 30 days; evidence artifacts for 7 days

What 3 simulations per month actually covers

Three simulations sounds limited. In practice it covers most of what a solo product needs tested regularly:

• Login and authentication flow — test for authentication bypass, session handling weaknesses, and account takeover paths before you add your first paying customer
• Primary API endpoint — test the endpoint that handles your most sensitive data or your core product action
• User-facing input surface — test the form, file upload, or query parameter that accepts user-controlled data

If your product is a SaaS with a signup flow, a dashboard API, and a settings or billing endpoint, three simulations per month maps directly to a monthly coverage cycle across all three. Run one simulation after each significant deployment that touches one of these surfaces.

Who the free plan is built for

Solo founders shipping a web product

If you're building alone — a SaaS, an API product, an internal tool that handles customer data — you're making security decisions without a security background. The Starter plan lets you run real attack simulations against your authentication, your data access logic, and your input handling, and get back evidence-backed findings you can act on directly. You don't need to interpret a list of CVEs or understand which scanner findings are false positives. You get confirmed exploit paths or confirmation that the path didn't succeed.

Small dev teams (2–5 people)

Small teams typically have one person who owns security as a secondary responsibility alongside their engineering work. Three simulations per month is enough to cover critical flows after each sprint cycle. The PDF export makes it easy to document what was tested and what was found — useful for internal records and for responding to customer security questionnaires without spinning up a full compliance program.

Indie developers with client projects

If you build web applications for clients, the Starter plan gives you a structured way to test each project before delivery. A PDF report showing tested attack paths and their outcomes is a stronger security deliverable than a verbal assurance, and it takes minutes to generate rather than hours.

Pre-revenue and early-stage startups

Security questions come up earlier than most founders expect — in enterprise sales conversations, in investor due diligence, in SOC 2 preparation. The Starter plan lets you establish a testing baseline before those conversations happen, so you can answer with evidence rather than uncertainty.

What the free plan does not include

The Starter plan is focused on single-target simulation. It does not include:

• Full-domain exploration — crawling and testing across all pages and endpoints of a domain is available on Professional and Business
• Credential stuffing simulation — testing your application's resilience to large-scale automated credential attacks requires the Business plan
• Deeper proof-of-impact validation — additional technique depth and retry logic for harder-to-confirm vulnerabilities is available on Professional and Business
• Team collaboration seats — the Starter plan is a single-seat account; adding collaborators requires a paid plan

For a solo founder or small team testing specific flows, none of these omissions are blocking. Full-domain simulation and expanded login security testing become relevant when the product is in production at scale and the team has grown past one or two engineers.

When to upgrade

The Starter plan is the right choice until one of these becomes true:

• You're deploying multiple times a week and three simulations per month isn't enough to cover your deployment cadence
• You need to test across multiple endpoints in a single run rather than targeting one URL at a time
• You're bringing in a second engineer or a security-focused hire and need shared access to results
• A customer, enterprise sales process, or due diligence review is asking for broader coverage and more detailed evidence

The Professional plan (€69/month) provides 200 single-URL simulations and 4 full-domain scans per month, a 10-seat team workspace, and 12 months of scan history — which is the right fit for a team actively shipping and monitoring a production product. There's also a 30% discount for new users for the first six months.

How to start

The Starter plan requires no credit card and no sales call. Create an account, add your target, confirm you have authorization via typed consent, configure authentication if needed, and launch a simulation. Results are typically available within 3–15 minutes.

Typed consent is how the platform confirms you're authorized to test the target — it is required before any simulation runs, regardless of plan. Optional DNS TXT record verification is also available for teams that want an additional ownership proof layer.

The output for each run includes the attack chains attempted, which ones reached a confirmed impact, the HTTP-level evidence for each confirmed finding, and reproduction steps you can hand directly to the engineer responsible for the fix.