Independent code review for startups: what it covers and when you need one
What an outside technical review actually looks at, what you should get back, and how to prepare. Written for founders who don't code.
Short answer
An independent code review, sometimes called a technical audit, is an outside expert's written assessment of what your developer or agency has built: how healthy the code is, whether the setup fits your stage, basic security, who owns what, and whether someone else could take it over. It's most useful before a large payment, a fundraise, or a change of developer.
When you're paying someone to build your product, you are trusting them on two things at once: that they're doing the work, and that they're doing it well. You can usually see the first. The second is hard to judge without a technical background. An independent review closes that gap.
What a review is, and what it isn't
A review is an honest assessment of the state of your product's technology, written for you, not for your developer. It is not:
- A bug hunt. Testing every screen is QA work. A review looks at the underlying health that decides how many bugs you'll have.
- A security penetration test. A review checks security basics. If you handle payments, health data or other sensitive information at scale, you may also need a specialist security audit.
- A sales pitch for a rebuild. A good reviewer has no reason to tell you to throw the code away unless it's true. That's the point of being independent.
What a good review looks at
1. Ownership and access
Is the code in a repository you own? Are the hosting, domain, database, app store accounts and paid services in your company's name? This is often the most important finding, and the easiest to fix.
2. Code health
Is the code organised and readable? Is the same logic copied in many places? Are there automated tests? The practical question underneath all of this: how hard will it be to change things next month?
3. Fit for your stage
Is the setup right-sized? Early products are often either over-built (expensive, slow to change) or under-built (no backups, no way to handle growth). Both are fixable when caught early.
4. Security basics
Passwords stored properly, secret keys kept out of the code, sensible access permissions, software kept up to date, and backups that actually restore.
5. Data
Is the database designed in a way that will hold up? Can you export your own data if you need to? Is customer data handled carefully?
6. How the work is delivered
Is there a proper process for testing and releasing changes, or do edits go straight to the live product? Is anything documented?
7. The plan ahead
Is the remaining work, and the estimate for it, realistic given what already exists?
What you should get back
- A written report in plain language, with a one-page summary you could share with a co-founder or investor.
- A clear split between what's solid, what's risky, and what's urgent.
- A prioritised list of fixes, so you know what matters now and what can wait.
- Specific questions to take to your developer, so the next conversation with them is productive rather than awkward.
- An honest view on fix versus rebuild, if that question is on the table.
- A call to walk through the findings, so you can ask anything that isn't clear.
Want someone experienced to look at your project? The first 15-minute call is free.
When a startup needs one
- Before a large payment, especially a final milestone.
- Before a fundraise. Investors increasingly ask about the technology during due diligence. Better to know the answers first.
- When things feel off: slipping estimates, recurring bugs, answers you can't follow. See the warning signs.
- Before switching developers, so you know what you're handing over. See how to switch without losing your product.
- When someone recommends a full rebuild. A rewrite is expensive. Get an independent opinion before you commit to one.
- Before you sign, to check a proposal and estimate are realistic.
What drives the cost
There isn't a standard price, because products differ a lot. The main factors:
- How big the product is, and how many parts it has (website, mobile app, admin panel, integrations).
- How much documentation already exists.
- How deep you need to go: a focused health check on one worry, or a full assessment.
- How quickly you need it.
We start with a free 15-minute scoping call, then give you a fixed quote for the report before any work begins, so there are no surprises.
How to prepare
- Read-only access to the code repository. You or your developer can grant this in a few minutes.
- A list of the services the product uses: hosting, database, payments, email, SMS and so on. Rough is fine.
- The original proposal or estimate, and any updates since.
- Your top three worries, in your own words. These shape where the review goes deepest.
Should you tell your developer?
That's your call, and there are good reasons either way. In practice you'll often need them to grant access, and many founders simply describe it as standard due diligence. Good teams generally welcome a second opinion, because solid work holds up. A reviewer working for you should be comfortable either way, and should never share findings with your vendor without your say-so.
How this works with us
- 15-minute scoping call (free). You tell us what's going on. We tell you honestly whether a review makes sense.
- Fixed quote. Based on size and depth, before any work starts.
- Review. We look at the code, setup and plan, and ask your developer questions if you want us to.
- Written report and walkthrough call. Plain language, prioritised, with next steps.
We work for you, not your vendor. If the work is good, we'll say so.
Common questions
What is an independent code review?
It's an outside expert's written assessment of the software your developer or agency has built: code health, whether the setup suits your stage, security basics, ownership of accounts, and whether another team could take it over. It's written for the founder in plain language.
How long does a code review take?
It depends on the size of the product and how deep the review goes. A focused health check is much quicker than a full assessment. The timeline is agreed along with the fixed quote before work starts.
Do I need to be technical to understand the report?
No. A good report is written for the founder: a short summary of what's solid, what's risky and what's urgent, followed by detail your developer can act on.
Will the reviewer contact my developer?
Only if you want them to. Some founders prefer the reviewer to ask the developer questions directly. Others keep the review private and use the findings to guide their own conversation.