QueryVeil

QueryVeil is a privacy-first AI data analyst that runs entirely in the browser. Users can drop in CSV, Excel, JSON, or Parquet files and ask questions in plain English — the AI doesn't just generate a single query, it investigates like a real analyst: running multiple SQL queries, self-correcting errors, comparing across dimensions, and surfacing root causes automatically.

All data processing happens locally via DuckDB WebAssembly. Files are never uploaded to any server. In standard chat mode, only the table schema and the user's question are sent to the AI — no data rows leave the browser. A fully offline mode using local AI (WebLLM or Ollama) keeps everything on the user's machine with zero external calls.

Key features:

• AI agent analysis — Ask "why did revenue drop?" and the AI runs a multi-step investigation: querying trends, comparing segments, identifying anomalies, and generating visualizations with follow-up suggestions.
• Four workspace modes — Chat with AI, write SQL with schema-aware autocomplete, build Jupyter-style notebooks, or create drag-and-drop reports. Switch between them in one click.
• Explore by clicking — Right-click any cell to drill down. Automatic follow-up suggestions after every answer. Breadcrumb trails track the investigation path.
• Auto-insights — Select any table to get an instant data brief: row counts, column profiles, distributions, anomaly detection, and data quality warnings — no query needed.
• Database connections — Connect to PostgreSQL, MySQL, or BigQuery alongside local files. Combine everything in one workspace.
• 14+ cloud AI models — Access GPT-4o, Claude, Gemini, DeepSeek, and more via OpenRouter. Choose fast models for quick questions or powerful models for deep analysis.
• Publish and share — Create polished reports with KPIs and charts, export notebooks, or share via public links and embeds.

Pricing: Free forever with local AI, unlimited files, chat, SQL editor, notebooks, reports, and auto-insights. Pro ($19/month or $190/year) adds cloud AI models, the deep analysis agent, database connections, and publishing. 14-day free trial, no credit card required.

Platform: Web-based. No installation needed.