PromptVault Pro

Encrypted AI Prompt Version Control & Dynamic Variable Injector

Privacy-first AI prompt engineering and version control workstation. Encrypts sensitive system prompts locally with AES-256-GCM, manages prompt revisions and diffs, estimates token counts across LLM models, and tests dynamic variable injection.

Purchase License ($34.99) Open Live Web Portal

Real Desktop Application Screens • Captured from the Running Program

100% Native Executable Node-Lock Verified

Head-to-Head Competitor Analysis

Why PromptVault Pro is cheaper, faster, and more secure than PromptBase / LangSmith ($468/yr).

Comparison Metric	PromptVault Pro	PromptBase / LangSmith ($468/yr)
License Model & Price	$34.99 (One-Time Perpetual)	$468/year recurring team subscription
Annual Financial Savings	Save $430/yr every single year
Competitor Drawbacks	Proprietary company prompts uploaded to third-party cloud servers, recurring subscription fees, privacy risks
Why Vivian Is Better	One-time $34.99 perpetual license, 100% offline AES-256 encrypted prompt vault, token and cost calculator, zero cloud lock-in
Execution Environment	100% Offline Air-Gapped	Mandatory cloud check-in
Runtime Telemetry	Zero Telemetry (0.00KB sent)	Cloud telemetry & user tracking

Engineering Specifications & Features

AES-256-GCM authenticated local encryption protecting proprietary prompt intellectual property

Git-like version control: commit prompt revisions, compare side-by-side visual diffs, and rollback

Dynamic variable template engine supporting {{variable}} placeholder replacement and testing

Accurate token count estimator for OpenAI GPT-4o, Anthropic Claude 3.5, and Meta Llama 3

Cost estimation calculator: forecasts per-query API costs based on input prompt and expected completion length

Local offline tag-based search: instantly find prompts by project, model, or customer use case

Graphical Interface (GUI) Architecture

Three-pane layout: Prompt library sidebar, version history timeline in middle, syntax-highlighted editor with variable injection preview and token counter on right.

Headless CLI Reference & Execution

PromptVault Pro includes a headless command-line binary ready for automation pipelines, cron daemons, and CI/CD runners:

# Headless command execution:
promptvault --eval-sample --prompt system.md --vars 'user=Alice,role=Admin' --calc-tokens gpt4o
# Cryptographic node-lock activation:
promptvault --activate YOUR-CROCKFORD-KEY

Core Architecture & Asymmetric Security

Local C++ desktop application with embedded SQLite database and OpenSSL encryption, ensuring zero prompt leaks to external clouds.