Built in Bratislava,
for English, Slovak and Czech data.
Synonym exists because teams here paste real names, birth numbers and IBANs into AI tools every day — and the tools built elsewhere don't recognise a Slovak birth number or a company ID. We do — and we validate them before we mask them. English data gets the same care.
Three things about us.
Not product features — the way the company is run.
Local first, English included.
We started with the identifiers our own regulators care about — Slovak and Czech birth numbers, company IDs, bank formats — and built English name detection alongside, not as an afterthought.
Small by design.
No ticket queue, no account managers. The people who write the detectors read the support inbox and answer within a business day.
Honest about status.
Certification progress is published openly on the Security page — done, in progress, or planned. We don't show badges we haven't earned.
Shipping, in the open.
The last three releases. The full list is on the changelog.
Small team. Strict rules.
What we validate, what we keep, and who holds the key.
Talk to the people who built it.
Questions about deployment, a detector you need, or a partnership — reach out and we'll walk through it with you.