Reverse Trial
A SaaS pricing pattern where new users start on the paid plan at a low intro price for a fixed window, then continue at standard rate or step down. VULK no longer uses this — see Plans Overview for the current model.
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 is nothing to "upgrade to" — they are already on it.
VULK doesn't use reverse trials anymore
VULK ran reverse trials at €1.99 / 7d (Builder) and €3.99 / 7d (Pro) until 2026-05-04. It briefly offered a free plan afterwards, but the current model is paid-only — no free plan and no trial:
- Builder — €19.99/month — 1,000 credits, all 16+ models, backend, deploy, code export.
- Pro — €39.99/month — 2,500 credits, image + video generation, 3D Studio, GitHub.
- Team — €79.99/month — 5,000 shared credits, unlimited members, shared workspace.
- Max — €199/month — 10,000 credits, priority generation, included .com domain.
- Business — €299/month — 20,000 credits, SSO/SAML, audit logs, SLA, dedicated support.
Why paid-only: card-required pricing selects for serious intent and keeps the product sustainable. Builder (€19.99/mo) is positioned as a low-friction entry point that still unlocks the full platform.
See /docs/plans-billing/plans-overview for the current pricing and /docs/plans-billing/trial-expiration for the historical context.
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.