Open Groupe
OpenGroupe is a French independent building expertise firm founded in 2009 that diagnoses cracks, humidity, construction defects, and drought damage for individual homeowners, property buyers, and insurance-dispute clients across metropolitan France via a network of 70+ independent experts.
- Company typePrivate
- Founded2009
- HeadquartersAthis-mons, France
- Headcount1–10
- GTM typeB2C
- OfferingServices
What Open Groupe does
OpenGroupe (legally SAS OPENGROUPE) is a French independent building expertise firm founded in 2009 by Stéphane Graindorge and headquartered in Athis-Mons (91200). The company diagnoses and documents building pathologies — primarily cracks/fissures, humidity, construction defects (malfaçons), hidden defects (vices cachés), and drought/clay-soil damage — for individual homeowners, property buyers and sellers, and policyholders in dispute with insurers. Service offerings span nine core expertises (cracks, humidity, general building, pre-purchase, malfaçons, VEFA delivery, CCMI reception, counter-expertise, and drought counter-expertise), supplemented by two modular products (Visio-Expertise for remote video assessments at €190 TTC and Avis Technique sur Dossier for document-based technical notes), with reports structured to DTU/Eurocode/NF standards and containing 20-80 annotated photographs opposable in court.
The technical stack combines on-site visual inspection by certified experts with conventional measurement instruments (hygrometer, thermal camera, fissurometer, level laser) — no AI or ML capabilities are disclosed. Four freemium online tools (Simulateur Risques, Diagnostic Fissures, Diagnostic Humidité, Éligibilité Sécheresse) and a YouTube channel serve as lead-generation and consumer-education assets. The go-to-market is sales-led, direct to consumers, with a 12-hour quote-response SLA, a dedicated phone line (01 69 49 09 67), and department-level SEO landing pages across all 12 metropolitan French regions.
The business model is asset-light: OpenGroupe employs 1-10 core staff and operates through a network of 70+ independent expert contractors covering 80+ departments, enabling national intervention within 48-72 hours. Revenue is generated on a one-time, unit-pricing basis per engagement, with on-site expertise starting at €990 TTC and complex drought counter-expertise priced at €990-€1,590 TTC. The firm has completed 5,000+ expertises since inception, holds a 4.9/5 Google rating across 185+ reviews, and maintains €300,000-per-claim ALLIANZ professional liability coverage compliant with Article L.271-6 of the French Construction and Housing Code. No external funding rounds, acquisitions, or institutional investors are disclosed.
Open Groupe firmographics
Firmographics- Name
- Open Groupe
- Legal name
- SAS OPENGROUPE
- Website
- https://opengroupe.fr
- Company type
- Private
- Founded year
- 2009
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- OpenGroupe is a French independent building expertise firm founded in 2009 that diagnoses cracks, humidity, construction defects, and drought damage for individual homeowners, property buyers, and insurance-dispute clients across metropolitan France via a network of 70+ independent experts.
- Ownership category
- akta.pro rank
Open Groupe industry classification
Industry- Product category
- Building Inspection Services
- NAICS
- Building Inspection Services (541350), Building Inspection Services (54135)
- SIC
- Services-Engineering Services (8711)
- akta.pro primary industry
- Foundation Crack Repair (Masonry/Concrete) (HSAGALAG)
Keywords
Where Open Groupe is headquartered
LocationHeadquarters
- HQ city
- Athis-mons
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Open Groupe business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Expertise Services: One-time expertise services for building pathology analysis including crack expertise, humidity expertise, pre-purchase inspection, construction defect expertise, and counter-expertise. Pricing varies by service type and property size.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Pay-as-you-go | Visio Expertise (Remote) - From €190 TTC |
| Unit Pricing | Pay-as-you-go | Complete On-Site Expertise - From €990 TTC |
| Freemium | Pay-as-you-go | Free Online Diagnostic Tools |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Open Groupe product offering
Product offeringCore offering
OpenGroupe provides paid independent building expertise and inspection services in France, analyzing structural cracks (fissures), humidity and mold issues, pre-purchase property condition, construction defects (malfaçons), VEFA new-build delivery, CCMI individual house reception, and counter-expertise against insurance company assessments (including drought/Cat-Nat claims). Each engagement produces a detailed written technical report with annotated photographs and recommendations, supported by a national network of 70+ independent experts enabling on-site intervention within 48–72 hours across 80+ French departments.
Product overview
Open Groupe is an independent building expertise firm offering a comprehensive portfolio of specialized inspection services for residential and commercial properties across France. The core offering consists of 9 main expertise services: Expertise Fissures (crack analysis), Expertise Humidité (moisture detection), Expertise Bâtiment (general building inspection), Expertise Avant Achat (pre-purchase inspection), Expertise Malfaçons (construction defects), Expertise VEFA (new build delivery), Expertise CCMI (individual house reception), Contre-Expertise (insurance counter-expertise), and Contre-Expertise Sécheresse (drought disaster support). These are supplemented by two supplementary modules (Visio-Expertise for remote assessments and Avis Technique sur Dossier for document-based analysis) and four free diagnostic tools (Simulateur Risques, Diagnostic Fissures, Diagnostic Humidité, and Éligibilité Sécheresse) that serve as lead generation and client education tools. The complete expertise package includes detailed written reports with photographs, technical analysis, and repair recommendations.
Differentiator
Problem solved
Functional benefit
Products and services
- Expertise Fissures
Quantifiable outcome
- 5000+ expertises completed
- +3 more outcomes
Companies that use Open Groupe
Customer profileNamed customers5 records
Segments3 records
Ideal customer profiles3 records
Open Groupe technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Open Groupe partnerships and signals
Strategic signalScale indicators6 records
Recent moves6 records
Expansion highlights5 records
Open Groupe competitors and assessment
Company assessmentBroad incumbents
- SOCOTEC: Major French testing, inspection, and certification firm offering building expertise, construction diagnostics, and compliance services across a much broader portfolio than OpenGroupe's niche focus on building pathology.
- Bureau Veritas: Global TIC (testing, inspection, certification) player with significant French building and infrastructure expertise operations, competing in the same end markets but at vastly greater scale and breadth.
- Ginger CEBTP: French engineering group specializing in geotechnical, construction pathology, and building expertise services — overlapping with OpenGroupe's crack, humidity, and structural diagnostics offerings.
Direct peers
- Agenda Diagnostics: National French real estate diagnostics franchise providing pre-purchase, building condition, and pathology expertise to individuals, with similar coverage-by-network distribution model.
- Diag Précision: French building diagnostics specialist delivering crack, humidity, and pre-purchase inspections to individual property owners — overlapping directly with OpenGroupe's core offerings at a smaller regional scale.
- Allodiagnostic: French building diagnostics provider offering pre-purchase inspections and pathology expertise to private clients, with a comparable transactional, consumer-facing service model.
- Qualiconsult: French building inspection and technical control firm providing construction expertise, regulatory controls, and pathology diagnostics to homeowners and professionals — directly comparable to OpenGroupe's core service set.
- AC Environnement: French building diagnostics network providing technical expertise and regulatory diagnostics (real estate transactions, building pathology) through a franchise-style expert model — comparable expert-network structure to OpenGroupe.
- BTP Consultants: French consultancy offering construction expertise, building pathology diagnostics (cracks, humidity), and technical assistance to individuals and professionals — closely mirrors OpenGroupe's positioning.
Regional players
- Cabinet d'Expertise Lacassagne: Independent French building expertise cabinet covering similar construction pathology and crack/humidity diagnostic services, but operating with more limited geographic reach than OpenGroupe's national network.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Open Groupe social profiles
Digital presenceOpen Groupe financial estimates
Financial estimateRevenue estimate
Valuation estimate
Open Groupe leadership team
Management profileNumber of profiles
Profiles1 record
Open Groupe funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Open Groupe M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Open Groupe
What does Open Groupe do?
OpenGroupe provides paid independent building expertise and inspection services in France, analyzing structural cracks (fissures), humidity and mold issues, pre-purchase property condition, construction defects (malfaçons), VEFA new-build delivery, CCMI individual house reception, and counter-expertise against insurance company assessments (including drought/Cat-Nat claims). Each engagement produces a detailed written technical report with annotated photographs and recommendations, supported by a national network of 70+ independent experts enabling on-site intervention within 48–72 hours across 80+ French departments.
Is Open Groupe a public or private company?
Open Groupe is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Open Groupe founded?
Open Groupe was founded in 2009. It employs 1 to 10 people.
Where is Open Groupe based?
Open Groupe is headquartered in Athis-mons, France, in the Europe region.
How does Open Groupe make money?
One revenue line is on record: expertise Services.
Who are Open Groupe's main competitors?
Broad incumbents on record are SOCOTEC, Bureau Veritas and Ginger CEBTP. Direct peers are Agenda Diagnostics, Diag Précision, Allodiagnostic, Qualiconsult, AC Environnement and BTP Consultants. Cabinet d'Expertise Lacassagne is listed as a regional player.
Does Open Groupe have an API?
No public API is recorded for Open Groupe.
What industry is Open Groupe in?
Open Groupe's product category is Building Inspection Services. Its primary akta.pro industry code is HSAGALAG, Foundation Crack Repair (Masonry/Concrete). Its NAICS code is 541350 and its SIC code is 8711.