Founders
I built this with an AI tool. I can't tell if it is safe to charge real customers.
For people who build with AI
The senior engineering team behind people who build with AI
You built it with AI. We make it safe, fast and ready for real customers.
Security, speed, scale and cost, checked by senior engineers, so you can launch without second-guessing.
- Lovable
- Bolt
- Cursor
- Replit
- Supabase
- Vercel
45clients
50projects
- Lovable
- Bolt
- Cursor
- Replit
- Supabase
- Vercel
Sound familiar?
The worries we hear before a launch.
Small businesses
My team is about to put customer names and phone numbers in here. I need that to stay private.
Agencies
A client wants this live. I need a straight answer before I hand it over.
Startups
The demo worked. I'm not sure it will hold up when more people show up.
How it works
Start, then check, then care.
One path. You join it wherever you already are.
Step 01
Solid Start
We set up the database, logins, hosting, backups and bill alerts in your own accounts before you build.
See this stepStep 02
Launch-Ready Check
We answer whether it is safe, private, fast and ready for customers. A Fix Sprint then does the repairs.
See this stepStep 03
Care Plan
We look after the live app: uptime, backups, security updates, speed and what it costs to run.
See this stepBefore and after
From a vibe-coded app to a launch-ready app.
Vibe-coded
- The preview works on your laptop.
- A stranger might open a list of customer emails.
- There is no tested backup.
- The bill can climb with nobody watching.
Launch-ready
- Real customers can sign in, and other people's records stay private.
- Backups are tested, in your accounts.
- Speed is measured, not guessed.
- Spending has a cap and an alert.
What you get
A report you can read without a developer.
Red, amber and green. What is wrong, in what order to fix it, and a walkthrough so you can ask questions. No terminal. No jargon for its own sake.
Sample report
Plain English, with a light for each question
Illustrative only. This is how a report reads. It is not a finding from a real app.
- Is it safe?Needs a closer lookA stranger could open one list of customer emails. That is the first thing we would close.
- Is customer data private?Not private yetOne signed-in person can see another customer's name and details.
- Is it fast?Looks fine in ordinary useThe main pages load quickly when you click around the way a customer would.
- Will it hold up?Not tested with a crowdIt has not been tried with lots of people at once. That test is part of the check.
- Is it built properly?Changes go straight liveThere is no practice copy. The next change would land on the app customers use.
- Are you overpaying?The bill can run awayThere is no spending cap. One exposed key to a paid service could run the bill up overnight.
Top fixes, in order
- Stop one customer from seeing another's records.
- Hide the keys to paid services, and turn on a spending alert.
- Add a practice copy before the next change goes live.
Who it's for
People who build with AI, and need engineers beside them.
Founders
You built an MVP with Lovable, Bolt, Cursor, Replit, v0 or Base44, and you want it ready for paying customers.
See if this is youSmall businesses
You are building a CRM, booking tool or quoting system because the off-the-shelf ones don't fit.
See if this is youAgencies and freelancers
You build with AI for clients, and you want a senior team behind the work you put your name on.
See if this is youEarly startups
The product grew past the prototype. New changes break old ones, or the bill climbs with use.
See if this is youProof
45 clients. 50 projects.
Teams we have worked with.
What clients say
“BlitzHash has by far the best developers I've ever had the pleasure of working with. My favorite project that we worked on together was for a highly complex pricing tool, involving hundreds of products, equations, and variables.”
“We developed a good partnership. I just wanted to share a quick note and let you know that you guys do a really good job. I’m glad I decided to work with you. You guys are reliable, flexible and very responsive.”
“BlitzHash has helped me build a new Wordpress site and clean up an older site, as well as creating graphics for social media campaigns. His work has been stellar and communication excellent. I would highly recommend him!”
“BlitzHash has communicated professionally all the time, they responded all mails in a short amount of time and was were friendly. They incorporated my feedback without hesitation (more times than agreed in the contract).”
Free tools
Check it yourself, or try something we built.
Launch-Ready Self-Check
About ten plain questions. A traffic light for security, privacy, speed, scaling, costs and backups. Your answers stay on the page. We don't save them.
Start the self-checkBrainHash
A free, private notes workspace we design, build and run ourselves. Proof that we look after software, not only advise on it.
Try BrainHash freeFrom the blog
Latest notes
Is the Supabase anon key safe in the browser? Only if this is true
The Supabase key in your frontend is public by design. It is only safe when Row Level Security does the real work. Here are the four conditions to check, and a one-hour self-test.
Read the noteEthereum's Glamsterdam delay: a pre-fork checklist for smart contract teams
Ethereum postponed the Glamsterdam test on Hoodi after ChainSecurity showed EIP-8037 and EIP-8038 can change how existing contracts behave. What changed, and what to check now.
Read the noteValkey and Redis cluster Pub/Sub overflow: who is affected and how to patch
Valkey and Redis shipped fixes on October 26 for a heap buffer overflow in cluster-mode Pub/Sub. How to tell if you are affected, the mitigations, and a rolling upgrade plan.
Read the noteHow pricing works
A custom quote after a free assessment.
We look at the app first, then send a proposal. Nothing starts until you accept it. Project work is paid in three parts. You own the code, the accounts and the data.
- 01Free assessment
- 02Proposal
- 03Acceptance
- 0430% advance
- 05Build
- 0640% on completion
- 07UAT (your acceptance testing)
- 0830% after UAT
UAT means you test the work and sign off. Care, if you want it afterwards, is billed each month and you can cancel any time.
FAQ
Straight answers
The AI builder already scans for security. Why do I need you?
A scan is a good start. It flags issues. It does not fix them, and it does not check your business rules, such as whether someone can give themselves access they should not have. It also skips your bill and your backups. In February 2026, Lovable said its scan had flagged issues in an app that later exposed 18,697 records. The fixes were never made.
Can't I just ask the AI to check its own work?
Do that, and use the free self-check too. The same tool tends to miss the same things. Independent studies have found problems in most deployed apps that were built with AI. An outside review looks at the app the way a stranger would.
I can't afford a developer.
Start with the free assessment. We scope only what matters for the stage you are in. Project work is paid in three parts: 30% in advance, 40% when the work is done, and 30% after you have tested it and signed off.
Will you rewrite everything or take over my app?
No. We fix it in place where we can. The code, the accounts and the data stay yours.
I'm nervous about giving you access.
We ask for the least access the work needs, only for as long as the work takes, and we remove it at the end. Say if you want that in writing before we start.
I have no users yet. Do I need this?
It costs less to fix problems before real customer data arrives. A Solid Start, or a lighter Launch-Ready Check, is sized to where you are.
Moving onto my own servers sounds risky.
We only suggest it when the numbers clearly pay off. Backups are tested first. You can stay on the managed service.
How much does it cost?
Every app is different, so every price is a custom quote after a free assessment. No work starts until you accept the proposal.
Why not hire a freelancer?
You get a team, a written report in plain English, and someone who can look after the app afterwards. A one-off freelancer can leave when the awkward parts show up.
Next step
Book a free technical assessment.
Thirty minutes. We look at where you are, whether you are about to build, ready to launch, or already live, and tell you what matters first. You leave with a written next step, whether or not you hire us.
Every price is a custom quote after your assessment. No work starts until you accept the proposal.