Research You Can Actually Trust

Fourier searches first, then writes. Every insight is backed by real sources — not AI hallucinations. Built for analysts, researchers and decision-makers who need investment-grade accuracy.

Professional-Grade Research Tools

Evidence-First Hybrid Retrieval

Every turn fuses vector and keyword search over your documents, conversations and the live web via Reciprocal Rank Fusion (RRF) — the model only ever sees the highest-signal evidence.

Deep Research Reports

Comprehensive multi-section reports with verified citations. Export as Interactive Artefacts for sharing with stakeholders.

Brief Me Mode

Get executive summaries on any topic. Perfect for quick decision-making without reading full reports.

Audio Summaries

Turn research into professional audio briefings. Listen on the go during commutes or meetings.

Real-Time Data

Access current market data, news, and trends. Always up to date with live web research.

The MEGA Protocol

Our proprietary Mandatory Evidence-Gated Architecture ensures every AI response is grounded in verified sources. Queries are classified, evidence is collected from authoritative sources, and responses are validated post-generation.

Professional Use Cases

Market Research — Track trends, analyse competitors, identify opportunities
Due Diligence — Company research with verified financial data
Industry Analysis — Deep dives into sectors and market dynamics
Strategic Planning — Evidence-based insights for decision-making

Why Fourier is Different

Search first, write from evidence only
Wikipedia-style inline citations on every claim
Tiered source authority (government, academic, news)
Gap reporting when evidence is insufficient
Export as shareable Interactive Artifacts

Ready for research you can trust? Start researching free.

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.