What Astero does

Astero SAS is a privately held French real estate agency headquartered at 8 rue Saint-Marc, Paris, founded in 2020 and operating as a SAS with €50,000 share capital (RCS Paris 879 538 064). The company was founded by former notaries and positions itself as a lower-cost, legally-rigorous alternative to traditional French real estate agencies, which charge an average commission of 5.78% of the sale price. Astero instead charges fixed fees starting at €4,990 and scaling to 2.5% on higher-value transactions, paid only upon successful completion of the sale via the notary at signing. Coverage spans 13 French departments including Île-de-France, Brittany (with a Rennes regional office), and parts of Nouvelle-Aquitaine and Pays de la Loire. Core headcount is 1-10 employees, supplemented by a network of regional "Conseillers immobiliers."

The product surface is anchored on the seller mandate ("Vendre avec Astero"), bundled with professional HDR photography, virtual tours, distribution to 35+ real estate portals (SeLoger, Bien'Ici, LeFigaro Immo, Logic-Immo, MeilleursAgents, LeBonCoin Pro, etc.) for claimed 99% buyer reach, buyer solvency verification, negotiation, and accompaniment through notary signature. Surrounding products include a free online estimation tool, an Espace Client portal (espace-client.astero.immo) for real-time sale tracking, Vente Interactive (online progressive bidding), Recherche Personnalisée (buyer-side hunting mandate with off-market access), Alerte Achat (48-hour pre-publication property alerts), a €1,000 parrainage referral program, and a content-marketing blog. The underlying technology stack is conventional web platform plus Google Analytics / Google Tag Manager / Meta integrations; there is no disclosed mobile app, API, SDK, or proprietary AI/ML component.

Revenue mechanics are pure transaction-fee, success-based: fees are invoiced only on completion of the mandate, so the model carries working-capital risk but eliminates customer acquisition friction. Go-to-market is a hybrid: digital self-service (online estimation, SEO blog, social on Instagram/Facebook/X/LinkedIn, paid acquisition, email) feeds a high-touch layer of local advisors who perform in-person valuations, conduct viewings, and negotiate offers. Customer segments are individual property sellers (primary), buyers, and investors, all in the consumer/SMB tier with no enterprise anchor. Operational signals include 1,000+ cumulative projects entrusted, a 4.9/5 Google rating over 100+ reviews, and earned media in Les Échos, Le Monde, Capital, Le Figaro, BFM TV, and L'Obs. The company holds a professional "Transaction" real estate card (CPI 7501 2020 000 045 552) and a €120,000 financial guarantee with Groupe Galian; no external equity funding has been raised.

Name

Astero

Legal name

SAS Astero

Website

https://astero-immobilier.fr

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

Astero is a French real estate agency offering fixed-fee property sales services starting at €4,990 as an alternative to traditional percentage-based agencies. Founded by former notaries, it serves individual sellers, buyers, and investors across 13 French departments.

Ownership category

akta.pro rank

Product category

Residential Real Estate Brokerage

NAICS

Offices of Real Estate Agents and Brokers (53121)

SIC

Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Seller Representation & Listing Services (BPAJAAAK)

akta.pro secondary industries

Buyer Representation Services (BPAJAAAJ), Online/Virtual Real Estate Auctions (Marketplace Platforms) (BPAJAEAJ)

Keywords

• Fixed-fee real estate agency
• Residential property sales
• Property valuation services
• Real estate transaction support
• Notary-backed brokerage

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Marketing or Sales, Operations, Technology or R&D, Infrastructure

Revenue model

1. Transaction Fees: Astero charges fixed, success-based fees for completed property sales. The fee structure starts at €4,990 for lower-value properties and scales up to 2.5% for higher-value properties. Payment is only required once the property is sold and the deed is signed at the notary. No fees are charged if the sale is not completed.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels6 records

Core offering

Astero is a French residential real estate agency that sells and buys properties on behalf of clients for a fixed fee starting at €4,990 (scaling up to 2.5% on higher-value transactions), paid only upon successful completion at the notary. The full-service offering covers property valuation, professional HDR photography, virtual tours, advertising across 35+ portals, viewing management, buyer solvency verification, negotiation, and legal accompaniment. Complementary offerings include free online estimation, a client transaction-tracking portal, interactive online sales (Vente Interactive), personalized property search with off-market access, and a buyer alert service.

Product overview

Astero Immobilier operates as a fixed-fee real estate agency founded by former notaries, offering a unified platform for property sales and purchases. The core offering combines Vendre avec Astero (fixed-fee sales service starting at €4,990) with complementary tools including Estimation en ligne (free online valuation), the Espace Client portal (transaction tracking), Recherche Personnalisée (property hunting service), Vente Interactive (online bidding sales), and Alerte Achat (early-access listing alerts). The blog provides educational content. The company operates physical agencies in Île-de-France and Brittany, covering Paris, Rennes, and surrounding areas.

Differentiator

Problem solved

Functional benefit

Products and services

• Vendre avec Astero (Fixed-Fee Property Sales Service) Full-service real estate agency mandate offering residential property sales with fixed fees starting from €4,990. Includes property valuation, professional HDR photography, virtual tours, distribution across 35+ portals, buyer screening, negotiation, legal verification, and accompaniment through to notary signature. Fees paid only upon successful sale completion.
• Acheter avec Astero (Personalized Property Search / Recherche Personnalisée) Dedicated property-hunter service with a specialized search mandate (mandat de recherche dédié), helping buyers find properties including off-market opportunities not listed on standard portals.
• Vente Interactive (Interactive Online Sale) Online property sale format that allows buyers to submit purchase offers digitally, with progressive bidding to achieve the best price for the seller.

Quantifiable outcome

• Average savings of €20,000 per transaction compared to traditional agencies charging 5.78%
• +3 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature3 records

Partnerships

Four partnerships are on record, tiered core and supporting.

• Real Estate Portals NetworkcoreChannel Partner/ Reseller/ DistributorAstero distributes property listings across 35+ professional real estate portals including SeLoger, Bien'Ici, LeFigaro Immo, AvendreAlouer, Logic-Immo, MeilleursAgents, LuxResidence, and LeBonCoin Pro, enabling 99% buyer reach versus ~25% for private seller platforms.
• Courtage PartnerscoreStrategic or Co-development PartnerPartnership with mortgage brokerage firms to verify buyer solvency before property visits, reducing risk of failed transactions due to financing issues.
• Diagnostiqueur PartnerssupportingStrategic or Co-development PartnerNegotiated rates with certified diagnostic technicians (diagnostiqueurs) for property diagnostics including DPE, electrical, gas, asbestos, lead, and termites assessments.
• Notary PartnerscoreImplementation/ SI/ Consulting PartnerNetwork of notaries for final deed signing and legal verification of transactions. Astero provides recommendations and facilitates connections between clients and notary partners.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Liberkeys: Paris-based tech-enabled fixed-fee agency offering reduced-commission sales services with similar portal distribution and digital toolset (online estimation, transaction tracking). Closely mirrors Astero's Île-de-France footprint and seller-side proposition.
• Stéphane Plaza Immobilier: TV-personality-branded discount French real estate franchise offering reduced commissions to individual sellers. Same target customer and pricing disruption thesis, scaled via franchise model rather than direct employment.
• MegAgence: French fixed-fee real estate network competing head-to-head with Astero on transparent pricing and reduced commissions. Targets the same value-conscious residential sellers and operates a similar hybrid digital + local-advisor model.
• Cordon Immobilier: French fixed-fee real estate agency with a comparable transparent flat-fee mandate structure. Directly competes for cost-sensitive residential sellers who would otherwise consider traditional percentage-based agencies.
• Efficient Immo: Pioneering French fixed-fee real estate agency offering comparable flat-rate seller representation across multiple regions. Closely overlaps with Astero on pricing model, target seller segment, and national portal distribution.

Broad incumbents

• Safti: Large French real estate network combining independent advisors with established local coverage. Targets residential sellers across the same geographic regions Astero is expanding into, providing competitive pressure on national rollout.
• Orpi: Largest traditional French real estate network. Competes in the same residential seller market but through percentage-based commission franchises rather than fixed fees; serves as the dominant incumbent Astero is positioning against.
• Laforêt: Long-established French real estate franchise network. Competes broadly for the same seller mandates via a wider portfolio of services (traditional brokerage, property management, financing) under percentage-based pricing.
• Century 21 France: Major French real estate franchise operating under the global Century 21 brand. Overlaps with Astero's target market as a traditional brokerage, but operates at much larger scale and with percentage-based commissions.
• Guy Hoquet l'Immobilier: National French real estate network with significant franchised local presence. Same customer segment as Astero but with established brand and full-service percentage-based fee structure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/asteroimmo

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Astero