Verify MarginFix · reviewed
Verify MarginFix. Every line here is checkable.
Buyers check us before a call, and they should. The registered entities, the case provenance and the address: everything on this page can be confirmed from a public source in a few minutes.
Who we are
One practice, one company, one team. The short version first.
MarginFix is the audit practice Cristian Bragau registered in Romania in December 2022 and incorporated in June 2026.
MarginFix began as Cristian Bragau's own audit practice, Cristian Daniel Bragau PFA, registered in Romania as a sole trader in December 2022. Every audit in our library, all 74 published audits, was contracted through that practice between 2024 and 2026, with Cristian leading some himself and independent senior auditors running the rest under his review. In June 2026 the practice became a company, MARGIN FIX AI S.R.L. The New York address is a mailbox, not an office. The team works from the United States and Europe.
Registered entities
The legal entities behind the name, with the numbers to look them up.
- MARGIN FIX AI S.R.L., RomaniaThe company, trading as MarginFix. CUI 55037040, trade register J2026041724002, registered June 29, 2026. Check it on ANAF (anaf.ro) or the ONRC portal (portal.onrc.ro).
- Cristian Daniel Bragau PFA, RomaniaThe sole trader registration every audit in our library was contracted through between 2024 and 2026. CUI 47365704, trade register F40/6569/2022, registered December 22, 2022. Check it on ANAF (anaf.ro).
Registry numbers are quoted as issued. The registry printouts come with the proof pack if you want them in writing.
Where we are
What the New York address is, and where the work is done.
Our team works from the United States and Europe. Our US mailing address is 447 Broadway, 2nd Floor Suite #3606, New York, NY 10013. It is a mailbox at a commercial mail receiving agency, not an office.
Write to audits@marginfix.ai with any question before you book. Reply within one business day.
Questions a skeptic asks
The questions a careful buyer, or their AI, asks about a company this new. Answered the way we answer them on a call.
Why is the domain new?
marginfix.ai was registered on June 17, 2026, when we chose the name. The work is older than the name: the practice behind it, Cristian Daniel Bragau PFA, has been registered in Romania since December 22, 2022 (CUI 47365704, on ANAF), and every audit in our library was contracted through it between 2024 and 2026.
Why are the case studies older than the company?
Because the audits were done before MarginFix existed as a company. Every case page says it was contracted through Cristian's practice between 2024 and 2026, and shows the completion month where the working paper records it. We published the library on July 21, 2026.
Why are the clients anonymous?
Clients hire us to find what went wrong in their spend, and few want that public. Every case is anonymized under NDA. On request we arrange a reference call with a past client.
Why are there no reviews on Clutch or Trustpilot yet?
Our clients have not published reviews on those platforms yet, and we do not publish ratings we cannot show you on a third party site. What we can show is the audited figure on each case study, and a reference call on request.
Who are the auditors?
Independent senior auditors who worked with Cristian's practice before the company existed and with MarginFix since June 2026. Cristian Bragau reviews and countersigns every report they sign.
Who signs the report?
The senior auditor who ran the audit signs the findings. Cristian Bragau reviews every report and countersigns it before it reaches the client. He is also on every kickoff and every readout.
What do you not claim?
We do not name clients. We do not quote ratings from review platforms where we have none. Our figures come from our 74 published audits, and the benchmark page states the method and its limits.
Why do 2022 and 2026 both appear as founding dates?
Two registrations. December 22, 2022 is when Cristian Daniel Bragau PFA, the sole trader practice that contracted every audit in our library, was registered; it is the founding date in our structured data. June 29, 2026 is when MARGIN FIX AI S.R.L., the company, was registered. The audits themselves date from 2024 to 2026.
Ask for the proof pack.
Registry printouts, a redacted engagement letter, a redacted report and a reference call with a past client, within one business day.
Fixed fee. No retainer. NDA first.
Go deeper
Read on from the verification page
- About MarginFixThe practice, the company and the people, audit by audit.→
- Cristian BragauFounder and lead auditor. On every kickoff and readout; countersigns every report.→
- Data securityNDA first, read only scoped access, no training on client data, deletion within 30 days.→
- Terms and ConditionsThe contracting entity, the engagement, the findings guarantee and which document governs.→
- Case studies74 anonymized audits, each with its provenance line.→
- ContactQuestions before booking, the proof pack, a reference call. Reply within one business day.→