PVT PromptVault Pro Global Cloud CDN
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High-Performance Commercial Native Suite

Encrypted AI Prompt Version Control & Dynamic Variable Injector

Secure, local-first prompt engineering workspace: AES-256 encrypted prompt storage, mustache/f-string variable interpolation, and precise token counter.

Buy Lifetime License ($34.99) Test Live Engine Demo
Competitor Comparison Why PromptVault Pro Is Cheaper & Better
Save $430/yr vs PromptBase / LangSmith ($468/yr)
Traditional Alternative:
PromptBase / LangSmith ($468/yr)
$468/year recurring team subscription
Proprietary company prompts uploaded to third-party cloud servers, recurring subscription fees, privacy risks
Vivian Commercial Engine:
$34.99 One-Time Perpetual
100% Offline Air-Gapped C++17
One-time $34.99 perpetual license, 100% offline AES-256 encrypted prompt vault, token and cost calculator, zero cloud lock-in
Native Desktop Application • Real GTK3 Program Screens
Live Compiled Binary Technical Wiki →
PromptVault Pro Native UI Showcase

Core Engine Capabilities

  • AES-256 local encrypted prompt vault protecting proprietary system instructions
  • Dynamic variable token substitution and few-shot example injector
  • Instant BPE token estimation and generation API cost calculator
  • Version history tracking and A/B test prompt comparison visualizer

Dual GUI & Console Interface

Designed for automated batch pipelines and power users alike. Features a high-performance native desktop GUI (GTK3 on Linux / Win32 on Windows) alongside a headless command-line interface with scriptable switches.

# Run native desktop GUI:

./promptvault --gui

# Headless batch processing:

./promptvault --render-sample

Interactive Engine Testbed

Microsecond Benchmarking

Test the live commercial engine execution in your browser through Cloudflare Cloud Platform:

Click 'Execute Engine Test' to dispatch benchmark telemetry...
Perpetual Commercial License
$34.99 / one-time