Technical due diligence for non-technical buyers

You can read a P&L but freeze at the codebase, and sellers know it. Here is a practical framework for assessing the technical health of a small digital business when you cannot read code yourself.

Plenty of capable buyers can read a profit and loss statement, spot a soft revenue trend, and sanity-check a traffic report. Then they open the technical section of a listing and something shifts. The codebase, the hosting, the "stack" – it reads like a language they were never taught, and the quiet conclusion becomes: I just have to trust them.

Sellers know this. It is the one part of a small deal where a buyer's confidence tends to collapse, and precisely the part where a hidden problem can quietly wipe out the multiple you paid. The good news is that most technical risk in a five-figure business is not about the elegance of the code. It is about who controls what, what the business depends on, and whether it can actually move to you – all of it checkable without reading a single line of code.

This piece is the code and infrastructure layer specifically. For the financial and operational side of a deal – revenue quality, cost verification, customer concentration – see our companion guide to due diligence on a sub-$500k digital business. Here we stay firmly in the technical lane.

Why technical risk is the blind spot in small deals

In the $1k–$150k band, a full technical audit rarely fits the budget. Paying a firm several thousand dollars to review a business you are buying for $20,000 makes no sense, so most buyers skip technical diligence altogether and hope for the best. That is the wrong lesson to draw. The answer is not "no audit", it is a proportionate one: surface the handful of risks that genuinely threaten the value, and leave the rest.

This matters more on a curated platform like Indiemaker because deals here settle in full by cash or wire at close, through escrow.com. There is no clawback, no deferred payment to hold back, no earn-out to renegotiate if something breaks in month two. Whatever technical landmines exist have to be found before the funds move, not after. That is a feature, not a flaw – clean settlement is what makes a deal final – but it puts the burden on you to look properly first.

Infrastructure: where it runs and who controls it

Start with the plumbing, because it is the easiest thing to verify and the most common place for trouble to hide.

Ask for a plain-language inventory of where the business actually lives: the hosting provider, the domain registrar, the email service, the database, and any content delivery or file storage. Then ask the question that matters more than any of it – who holds the logins?

The pattern you want to see is consolidated, business-owned access: accounts held in one place, ideally under a company or a dedicated business email, ready to be transferred or handed over cleanly. The pattern that should slow you down is access scattered across the seller's personal logins – a domain on a personal registrar account tied to their private email, hosting under a login they also use for three other side projects, an SSL certificate nobody can quite locate. Scattered access is not necessarily fatal, but every place it is tangled is a place the handover can stall.

Dependency and platform risk: what the business is built on top of

Almost every small digital business stands on top of someone else's platform. That is fine, until that platform is a single point of failure.

Ask what the business depends on to function and to earn: a specific API, an app store, a search engine's referral traffic, a social platform's reach, a payment processor. Then ask what happens if any one of them changes its terms tomorrow. A business whose entire revenue rides on one third-party API that could revoke access, or one app store that could change its cut or delist a product, carries a risk that no amount of clean code offsets.

You are not looking for zero dependency – that barely exists. You are looking for concentration. One dependency that could erase most of the value if it moved against you is worth pricing in. Several diversified dependencies, none of them existential, is a much healthier picture.

Code quality signals you can read without reading code

You do not need to read code to read the signals around it. A few proxies tell you a surprising amount.

Ask to see the commit history. You are not judging the code, you are looking at rhythm: steady, recent activity suggests a maintained project, while a long silence can mean the product has been coasting or quietly breaking. Ask whether there is any documentation – a setup guide, notes on how things are deployed, a list of what runs where. Ask whether there are automated tests, and do not worry about the answer being technical; the honest presence or absence of them is the signal.

Then ask the single most revealing question in technical diligence: "what breaks most often?" A seller who answers specifically and calmly – naming a flaky integration, a monthly manual job, a known bug they work around – is telling you they understand their own machine. A seller who insists nothing ever breaks is either not paying attention or not being straight with you. Both are worth noting.

Security and data: the checks that protect you post-close

Some technical problems only surface after you own them, which is exactly why they belong in diligence.

Ask who currently has access to the systems, including any freelancers, former contractors, or old team members whose credentials were never revoked. Ask how secrets – API keys, passwords, payment credentials – are stored, and whether any are hard-coded in places that would need cleaning up. And ask what personal data the business holds and what obligations come with it. If the business collects customer data, you may be inheriting responsibilities under data-protection rules, and "we never really thought about it" is an answer that should prompt more questions, not fewer.

Transferability: can this actually move to you?

This is where technical health meets deal reality. A business can be well built and still be painful to transfer if it is fused to the founder's identity.

Accounts held in a company name, or under transferable business logins, move cleanly. Assets welded to the founder personally – a domain on their personal registrar, an app published under their individual developer account, integrations authenticated through their private profile, a payment account in their own name – do not simply hand over. Some can be migrated with effort; some cannot move at all and have to be rebuilt. Map every critical asset to how it will actually change hands before you agree a price. For the fuller treatment of what makes an asset move cleanly, see what makes a digital project transferable.

When to pay a developer – and exactly what to ask them

On a five-figure deal, a few hours of a trusted developer's time is cheap insurance. The mistake is asking them to "review the business", which is open-ended and expensive. Scope it to specific questions instead.

Give them a short, blunt brief: Is the code roughly what a business of this size and price should have, or are there obvious red flags? Are there security problems a new owner would need to fix immediately? How hard, honestly, would this be to take over and keep running? Is anything here impossible to transfer? You are buying a sanity check on the answers the seller gave you, not a line-by-line audit. A developer who spends three focused hours on those questions will tell you more than a generic report ever could.

This pairs well with being sceptical about the numbers, too. Do not take dashboards at face value – our note on why you should stop trusting analytics vendors in small deals applies just as much to technical claims as to traffic figures.

Turning findings into price or walk-away decisions

Diligence is only useful if it changes what you do. Every technical finding maps to one of three actions.

Adjust the price. A dependency you will need to diversify, a chunk of maintenance debt, a migration that will cost you developer time – these are real costs, and they belong in your offer. On a business valued on annual trailing profit at a modest multiple, a genuine technical liability can reasonably shift the number.

Add a transfer condition. Some findings are handover problems rather than price problems. Access that needs consolidating, a domain that must move to a business account, credentials that need rotating – make them conditions of the deal, completed before or at settlement, not promises for later.

Walk. Occasionally the answer is no: an existential single dependency the seller cannot address, a core asset that genuinely cannot transfer, a security posture that would cost more to fix than the business is worth. Walking away is a valid outcome, and the whole point of doing this work before the wire, not after.

Technical due diligence for a non-technical buyer is not about becoming an engineer. It is about turning "I just have to trust them" into a short list of questions with checkable answers. Run the list, price what you find, and you will approach the codebase with the same clear eyes you already bring to the numbers. If reading listings themselves still feels opaque, our guide to reading a listing like an experienced buyer is a good next step.