Your product moves money long before it touches a chain.
A payments company, a neobank, a card issuer, a brokerage: the value moves through an app, an API, a cloud account, and a handful of people with admin. Guardian tests that surface the way an attacker reaches it, runs the controls around it, and gives you the trust center your partners keep asking for.
- Pentests
- Compliance & Trust Center
- Managed Security
Everything inside the dashed line is reachable from the internet. Everything inside it can move money.
The interface between a user and their funds.
Your frontend and its backend decide who is authenticated, what they may authorize, and whether a withdrawal proceeds. Guardian attacks those decisions directly, in the flows where being wrong costs money, and maps the application function by function rather than sampling it.
- WebApp pentest Authentication and session handling, horizontal and vertical access control, value-moving flows, client-side surface, business logic, and every parameter the app accepts.
- API pentest Key scoping and revocation, per-object authorization, rate limiting and replay, undocumented and staging endpoints still reachable in production.
- Infrastructure pentest Cloud posture and IAM, data at rest, secrets handling, build and deploy integrity, containers and clusters, and the vendor consoles that can change production.
- SDK audit What your client libraries encode and sign, how they treat keys and tokens, and the gap between the repository and the published package.
- Browser extension pentest Permissions, content scripts, internal messaging, key and session storage, signing flows, and who is able to publish an update.
Working from the source repository is strongly recommended: it is the only way to be certain nothing user-reachable was missed.
Stop answering the same security questionnaire.
Every bank partner, every enterprise customer, every exchange sends a different spreadsheet asking the same forty questions. Guardian turns your security work into one page they can read themselves: what was reviewed, what the controls are, what is still open, and who owns it.
Concise evidence, clear assumptions, no hand-wavy claims. The point is that a reader can check it without calling you.
- Control mapping What controls exist, who owns each one, and how they map to the architecture you actually run rather than to a template.
- Evidence packages Audit and pentest outputs, retest status, monitoring coverage, and release history, assembled so a reviewer can follow the chain.
- Partner diligence Technical responses for banks, enterprise customers, exchanges and custodians, answered once and kept current.
- Residual risk, stated Known assumptions, accepted exposure, and what is still open with an owner against it. Reviewers trust the page that admits something.
- Kept current The page is maintained alongside the engagement, so it does not quietly go stale between funding rounds.
A standing security function, without hiring one.
Most fintechs reach real transaction volume before they reach their first security hire. Managed Security covers the gap: operational controls held in place as the team grows, and the Shield perimeter watching every internet-facing surface and network you have.
- Operational security Access and permissions across every system, SSO and 2FA actually enforced, joiners and leavers, secrets handling, and who can still get in after someone leaves.
- Controls Release and change control, environment separation, approval thresholds, and incident runbooks rehearsed before they are needed.
- Shield: internet-facing surfaces Continuous discovery across your hosts, ports, services and storage, each finding verified by an engineer so you get confirmed exposure rather than scanner noise.
- Shield: networks and edge TLS and certificate issuance, WAF and CDN rules, whether the origin can be reached around them, and the DNS and registrar controls that decide where your users land.
- Someone to call A named security engineer for the decisions that cannot wait for the next audit window.
The loop is the product. A one-time sweep tells you about the box you spun up last quarter, not the one you will spin up next Tuesday.
Find out what a stranger can reach.
Send us the app, the API, and the cloud account. You will get back confirmed exposure in priority order, and a page you can hand to the next partner who asks.