When a startup sells software to a large organisation, the deal usually runs through a supply chain security review. The buyer expects a high standard of data protection, but they know no software is ever perfectly secure. What they are really looking for is evidence of practical safeguards that reduce their risk before they connect your product to their business.
Large buyers often assess suppliers using established frameworks, such as the UK National Cyber Security Centre's supply chain security guidance, which sets out principles for overseeing the suppliers and dependencies an organisation relies on. Here is what a procurement team actually checks when it assesses your platform.
How you manage your own supply chain
Before a buyer shares sensitive data, they want to understand the risk your product brings with it, including the third-party code it depends on. Modern applications are built on external libraries and services, and a weakness in one of those can become a weakness in yours. Procurement teams look for evidence that you know what your software depends on, keep those dependencies up to date, and have a way to react when one of them turns out to be vulnerable.
Whether one customer can reach another's data
Buyers focus heavily on data isolation, because a failure here exposes their information directly. Say your product fetches an invoice through an address such as /invoices/5001. A buyer needs to know that a logged-in user cannot simply request /invoices/5002 and see another customer's records. You satisfy this by enforcing access checks on the server for every request, confirming the user is entitled to that specific record, rather than trusting what the browser shows.
How you handle secrets and credentials
Procurement teams look closely at how you store the keys to your systems. If a developer writes an external billing token straight into the source code, anyone with access to the repository can read it. You address this by keeping application secrets in environment variables or a secrets manager rather than in the code, while storing user passwords as securely hashed values. Using parameterised database queries, rather than building them by hand, further shows disciplined engineering.
Whether an independent party has checked your work
Passing a procurement review takes more than a completed spreadsheet. Buyers increasingly want independent evidence that your software is actually built the way you say it is, because a team cannot reliably mark its own homework.
Our approach at Secvura is built for startups and fast-moving teams who need to understand their position quickly. We focus on a find and fix method: we carry out a thorough application security assessment to identify vulnerabilities, then give your team the guidance to put them right. That gives you independent evidence to put in front of a buyer, so your answers rest on more than a self-assessment.
Once you know what a buyer checks, the next step is answering their questionnaire well, without over-claiming. If you would like a security review of your platform first, you can get in touch through our website.