Propsight — Real-estate intelligence platform

Propsight: where good real-estate decisions start

Propsight is a real-estate intelligence platform designed and built by Apeiron Technologies. Its mission: give a buyer, an investor or a real-estate pro a clear read of the French market in a single interface — replacing the usual five tabs, spreadsheet and price map.

Official site: propsight.fr

The context

A listing on its own is not enough to decide. You need to check the price, retrieve the publication history, compare with actually signed sales, test rental profitability, understand the neighbourhood dynamics and factor in upcoming urban projects. Any serious buyer or investor does this manually — poorly, slowly, with incomplete data.

Propsight replaces that back-and-forth with a single read, cross-referencing more than 100 market signals per property.

Key numbers powering the engine

• 1,500+ real-estate sites tracked (Leboncoin, SeLoger, Bien'ici, Logic-Immo, Le Figaro Immobilier, PAP, ParuVendu, Ouest-France Immo…)
• 17M+ signed sales analysed — real transaction prices, comparables and negotiation benchmarks
• 50+ French public data sources cross-referenced: income, energy, risks, permits, amenities, local market
• Full publication history: time on market, price drops, relistings

What Propsight delivers on every property

Each listing is turned into a structured decision sheet around six readings:

1. Fair price

Comparison of the listing against actually signed sales in the area, with a target price range and positioning (attractive / at market / overpriced).

2. History

How long the property has been listed, on how many portals, with what price evolutions and relistings — a strong negotiation signal.

3. Negotiation margin

Estimated negotiation range, computed from time on market, past price drops and local tension.

4. Rental potential

Estimated rent, gross and net yield, cash-flow, taxation — reading a property immediately with an investor's eye.

5. Local context

Rental tension, price momentum over 6 / 12 months, upcoming urban projects, transport, shops, schools, risks.

6. Propsight AI analysis

A multi-signal synthesis produced by Propsight models that turns 100+ signals into a clear decision (attractive opportunity, worth watching, to negotiate, to skip) with a global score.

The user experience

• Multi-portal search: the same property is reconciled across sites, with the best price and the complete history
• Smart alerts: price drop, relisting, new listing matching investor criteria
• Investor dossier: build, compare and export several scenarios (rental company, holding, primary residence)
• Dynamic price map by neighbourhood, with yield and tension heatmaps
• Take action: compare, save, schedule a visit, prepare a data-backed offer

What Apeiron delivered

• Full SaaS platform (premium web frontend, back-office, API)
• Ingestion pipelines continuously fetching 1,500+ listing portals
• Reconciliation engine for duplicated listings across portals
• Signed-sales database (17M+ transactions) with load, dedup and enrichment
• Integration of 50+ French public data sources (DVF, IRIS, Sitadel, Géorisques, INSEE, etc.)
• Proprietary estimation models (fair price, rent, profitability) and a multi-signal AI synthesis layer
• Real-time alert engine (price drops, relistings, new matches)
• Premium responsive design system
• Waitlist, onboarding and end-to-end product analytics

Technical architecture

• Frontend: React + TypeScript, premium responsive design, interactive cartography
• Backend: Node.js / Python, REST API, PostgreSQL + analytical warehouse
• Data pipelines: continuous ingestion, dedup, multi-source reconciliation, historisation
• ML/AI models: price, rent, profitability, local tension; an LLM layer for multi-signal synthesis
• Cartography: performant vector rendering, price / yield / tension heatmaps
• Scalable cloud hosting, 24/7 monitoring
• Security & GDPR: encryption, consent management, separation of personal and public data

The Apeiron partnership

Apeiron Technologies operates Propsight end-to-end: product, data engineering, estimation models, full-stack development, hosting, monitoring and continuous evolution. The platform is designed to scale across France and other European markets.

Are you a real-estate player, bank, insurer or platform looking to build your own market-intelligence solution — listings, signed sales, estimation AI, investor dashboards? Apeiron can build the same platform, tailored, for your business.