Changelog

What changed, and when.

Last release 14 Sep 2026·Get release notes by e-mail

Every release, in plain language: new detectors, product changes, security work. No marketing, just the diff.

Website

New website

  • Redesigned usesynonym.eu: interactive round trip, live check-digit gate, session lifecycle and door explorer.
  • Industry pages with a detector pack for legal, finance, healthcare, HR, insurance, public sector, support, accounting and real estate.
  • English Terms of Service and Privacy Policy; sitemap, structured data and llms.txt for search and AI engines.
Detectors

34 new validated detectors

  • Vehicle and device identifiers: VIN, IMEI, SIM ICCID, MAC address, licence plates.
  • Finance and tax: LEI, ISIN, SEPA Creditor Identifier, payment symbols (VS/KS/SS), card expiry & CVV, EORI, excise (SEED) numbers, GS1/EAN.
  • Identity documents: ID card numbers, driving licences, Ukrainian tax ID (RNOKPP) and passports, neighbouring national IDs, date of birth, age.
  • Legal and public sector: court file numbers, ECLI identifiers, data box IDs (CZ), cadastral parcel / LV numbers, GPS coordinates.
  • Healthcare: health insurer codes, practitioner codes, ATC drug codes, lab results with units, EHIC numbers.
  • Support: supply-point (EIC) codes, parcel tracking numbers, session tokens and API keys, profile URLs, custom pattern detector.
Product

Plans: Starter, Pro and Business

  • Starter, Pro and Business plans — all at €0 per user during launch; Free stays free with every checksum detector.
  • Session key validity per plan: 4 h Free, 24 h on paid plans.
  • Upload limits per plan: 20, 100, 250 and 500 MB per file (CSV, XLSX, PDF).