Terms of Service

Last updated: January 2026

Welcome to Fourier Study. By accessing or using our AI research platform, you agree to be bound by these Terms of Service. Please read them carefully before using the service.

Service Description

Fourier Study is an AI-powered research and study platform that provides evidence-based responses, executive briefs, audio summaries, flashcards, and deep research reports. The service includes:

AI-assisted research with verifiable citations
Multiple content modes: Chat, Brief Me, Audio Summary, Flashcards, Deep Research
Study Mode with document upload and test generation
Content sharing via email and web links

User Obligations

When using Fourier Study, you agree to:

Provide accurate account information
Maintain the security of your login credentials
Use the service for lawful purposes only
Not attempt to circumvent security measures or access controls
Not use the service to generate illegal, harmful, or misleading content
Verify AI-generated research before relying on it for critical decisions

Intellectual Property

Your Content: You retain ownership of any documents, queries, or materials you upload. By uploading content, you grant us a limited licence to process it for providing our services.

Generated Content: Research outputs, briefs, and summaries generated through our service are provided for your use. You may use, share, and modify this content.

Our Platform: The Fourier Study platform, including its design, features, and underlying technology, remains our intellectual property.

Important Disclaimers

While we strive for accuracy and always cite sources, AI-generated research may contain errors. Always verify important information independently, especially for medical, legal, financial, or safety-critical decisions. The service is provided "as is" without warranties of any kind.

Billing & Payments

Payment terms and subscription details are clearly presented at the point of purchase. Refund policies are communicated with billing information.

Account Termination

You may delete your account at any time through your account settings. Upon deletion, all your data will be permanently removed. We may suspend or terminate accounts that violate these terms or pose security risks.

Governing Law

These terms are governed by the laws of England and Wales. Any disputes shall be subject to the exclusive jurisdiction of the courts of England and Wales.

Contact

For questions about these terms, contact us at info@wachump.net.

Fourier Study — Evidence-First AI Research with Hybrid Retrieval (RRF)

Investment-grade AI research with zero fabrication. Every chat turn runs hybrid retrieval — vector (pgvector) and keyword (Postgres full-text) search fused via Reciprocal Rank Fusion — so the model only ever sees the highest-signal evidence, and every factual claim is grounded in verified sources with anchored citations.

What Fourier does

Hybrid retrieval on every turn — vector + keyword search fused via Reciprocal Rank Fusion (RRF, k=60) across your documents, conversations and highlights
Live web research with verified citations across every claim
Deep research reports with cross-verification and source grounding
Document analysis for PDFs, Word documents and spreadsheets
Multi-format outputs: chat, executive summaries, slides, audio briefings, flashcards
Project management with task boards, timelines and risk maps
Google Workspace integration for Calendar, Drive, Docs and Sheets
Study mode with personalised learning, progress tracking and Socratic feedback

For analysts, researchers and decision-makers

Fourier is built for professionals who need accurate, verifiable information. Every output is traceable to its source. Enable JavaScript to access the application, or learn more at fourierstudy.net.