Reverse Trial
A pricing pattern where new users get full access to a paid plan for a short window — at a low introductory price — and downgrade or cancel at the end. VULK uses Reverse Trials at €1.99 / 7d (Builder) and €3.99 / 7d (Pro).
Reverse Trial
A reverse trial is the inverse of the classic SaaS free tier: instead of giving users the cheap-or-free plan and asking them to upgrade, the user starts on the full paid plan for a fixed introductory window (5-14 days) at a low intro price, then either continues at the standard rate or steps down. The pattern was popularized by Notion, Superhuman, and Linear. It selects for serious intent (the user pays at signup), shows the user the real product (not a stripped-down free tier), and reduces the conversion drop-off because there's nothing to "upgrade to" — they're already on it.
VULK uses Reverse Trials exclusively. There is no perpetual free tier. The Builder Trial is €1.99 / $1.99 for 7 days with 1,000 credits and full Builder features; the Pro Trial is €3.99 / $3.99 for 7 days with 2,500 credits and full Pro features. On day 7 the subscription rolls to the standard monthly price unless cancelled. 3D Secure is forced on every checkout.
Multi-tenant PostgreSQL
A database architecture where many customer "tenants" share the same Postgres cluster but are isolated at the schema or row level. VULK uses schema-per-project isolation on AWS RDS PostgreSQL 16 in Frankfurt.
PSD2 Mandate
The EU's Payment Services Directive 2 requires Strong Customer Authentication (SCA) on most card payments inside the EEA. A "mandate" stores the customer's authorized intent so future off-session charges can succeed without re-authenticating.