Kelvin
Kelvin is a Paris-based B2B SaaS company offering an AI-powered platform (kelvin°) that helps French energy renovation professionals qualify leads, generate renovation scenarios with subsidies and financing, and close more projects from a single property address.
- Company typePrivate
- Founded2021
- HeadquartersMontreuil, France
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What Kelvin does
Kelvin is a Paris-based B2B SaaS company (legal entity: KELVIN TECHNOLOGIES) that sells an AI-powered commercial platform to energy renovation professionals in France. Its core product, kelvin°, aggregates property and renovation information from a single address — building envelope, systems, surfaces, energy type, and historical data — and uses an AI engine trained by thermicians and architects to generate personalized renovation scenarios with estimated work budgets, available subsidies (CEE, MaPrimeRénov'), and financing options, all calibrated to the French 3CL-DPE methodology. The platform is co-developed with CSTB (Centre Scientifique et Technique du Bâtiment) and validated against on-site audits at <5% deviation on kWh/m².year (Hellio case study). The technology stack combines geostatistical modeling, 3D building reconstruction, computer vision, and structured-data retrieval across more than a dozen open databases (CSTB, URBS, EPISCOPE, ADEME, INSEE, cadastre, DPE registers).
The kelvin° platform is organized around three workflow modules: an embeddable Simulateur for lead generation across websites and Meta/Google/SMS/WhatsApp campaigns; an Outil d'aide à la vente (Sales Qualification Tool) that consolidates property, client, and subsidy data on a single dashboard with automatic MPR, CEE, and financing calculations; and a Ciblage prospection terrain (Site Prospecting) module that uses satellite imagery and geolocation to map prospect addresses around existing sites. Supporting free tools include the Calculette CEE, Calculette MPR, Annuaire RGE, Annuaire CEEs, and a Diagnostic de prospection. Vertical-specific modules (Logiciel PAC for heat pump installers, Logiciel Isolation for insulation specialists) extend the platform into trade-specific workflows. A public REST API plus Zapier and Mixpanel integrations enable CRM and analytics extensibility.
Kelvin operates a freemium-to-subscription go-to-market: free account creation without a credit card, plus quote-based enterprise tiers sold via direct sales to franchise networks, commercial platforms, study offices, ECFRs, and real estate agencies. Named customers span SMB contractors (Mon Majord'home, CaseRénov, Green Renov, Royal Home), enterprises (Hellio, effy, BigMat, Go Groupe, Questions-Immo.com), and government (Veyle Communauté de communes); the platform reports 2,000+ active professionals. The company raised €5 million in seed funding in June 2024 led by Racine² with participation from Seedcamp, Kima Ventures, Motier Ventures, RAISE, and Serena, and deploys a multi-channel marketing motion spanning content/SEO, paid acquisition, webinars, industry events, and partner referrals.
Kelvin firmographics
Firmographics- Name
- Kelvin
- Legal name
- KELVIN TECHNOLOGIES
- Website
- https://go-kelvin.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Kelvin is a Paris-based B2B SaaS company offering an AI-powered platform (kelvin°) that helps French energy renovation professionals qualify leads, generate renovation scenarios with subsidies and financing, and close more projects from a single property address.
- Ownership category
- akta.pro rank
Kelvin industry classification
Industry- Product category
- Energy Renovation Software
- NAICS
- Solar Electric Power Generation (221114), Steam and Air-Conditioning Supply (221330)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- Utilities & Energy Management (Meters, Boilers, Chillers) (EDALALAH)
Keywords
Where Kelvin is headquartered
LocationHeadquarters
- HQ city
- Montreuil
- HQ country
- France
- HQ region
- Europe
Offices1 record
Markets served
Kelvin business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Marketing or Sales, Personnel, Operations
Revenue model
- Subscription to kelvin° platform: Professionals pay to access the kelvin° AI platform for lead generation, commercial qualification, and renovation project management. The platform is described as 'Sans carte bancaire | +2000 pros l'utilisent' (no credit card required, free trial), indicating a freemium-to-subscription model where basic access is free and paid tiers unlock advanced features. Pricing is quote-based / not publicly disclosed.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free tier for individual pros |
| Subscription | Annual | Enterprise / team tier for franchise networks and commercial platforms |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
Kelvin product offering
Product offeringCore offering
Kelvin (KELVIN TECHNOLOGIES) operates the kelvin° platform, a B2B SaaS solution that uses AI to aggregate property information from a simple address and generate energy performance estimates, 1-3 renovation scenarios, and government subsidy calculations (CEE, MPR) for energy renovation professionals. The platform covers the full commercial workflow from prospect identification and site targeting through lead capture, sales qualification, quote preparation, and financing of the client's remaining contribution.
Product overview
Kelvin operates as a unified commercial platform for energy renovation professionals, built around the central AI-powered kelvin° platform. The platform integrates a website-embeddable Simulator for lead generation, a Sales Qualification Tool (Outil d'aide à la vente) for project qualification and quote generation, and a Site Prospecting module (Ciblage prospection) for field targeting. Supporting these core modules are free tools including a CEE Calculator (Calculette CEE), an MPR Calculator (Calculette MPR), an RGE Professional Directory (Annuaire RGE), a CEE Reference Directory (Annuaire CEEs), and a Prospecting Diagnostic. The platform is co-developed with CSTB and uses AI combining open data, computer vision, geostatistical modeling, and 3D reconstruction based on the 3CL-DPE method to generate renovation scenarios from a property address alone.
Differentiator
Problem solved
Functional benefit
Products and services
- kelvin° Platform A commercial platform for energy renovation professionals that uses AI to aggregate all key property information from a simple address — from initial prospect identification through to signed quotes with financing — covering site prospecting, work simulation, sales qualification, and government aid calculation.
- Simulateur (Simulator) A lead-generation tool embedded on a professional's website, social media, or advertising campaigns. Prospects enter a property address and receive instant energy performance estimates and renovation scenario previews in exchange for their contact details.
- Outil d'aide à la vente (Sales Qualification Tool) An AI-powered sales tool that consolidates all property and prospect information into a single dashboard for sales teams, automatically calculating MPR and CEE subsidies, financing options, and generating downloadable client reports before on-site visits.
- Trouver chantiers / Ciblage prospection (Site Prospecting & Targeting) A field prospecting module that identifies properties matching a professional's criteria (year of construction, energy type, DPE letter) around existing job sites, using satellite imagery and geolocation to map addresses for targeted outreach.
- Calculette CEE (CEE Calculator) A free online calculator that estimates CEE (Certificats d'Économies d'Énergie) volumes and subsidies for renovation projects from a property address, supporting all BAR standard sheets (BAR-TH, BAR-EN, BAR-SE, BAR-EQ).
- Calculette MPR (MPR Calculator) A free calculator for estimating MaPrimeRénov' (MPR) subsidies for renovation projects, helping professionals and homeowners determine eligible amounts based on income profile and work type.
- Annuaire RGE (RGE Directory) A free directory search tool for finding RGE-certified (Reconnu Garant de l'Environnement) professionals in the energy renovation sector, integrated into kelvin's platform.
- Annuaire CEEs (CEE Directory) A free directory for looking up CEE (Certificats d'Économies d'Énergie) standard operation sheets applicable to specific renovation work types.
- Diagnostic de prospection (Prospecting Diagnostic) A free diagnostic tool that evaluates a professional's field prospecting effectiveness through a 7-question assessment, producing a prospection score out of 100 with three personalized action recommendations.
- Logiciel Isolation (Insulation Software) A specialized module for insulation professionals that provides energy performance simulation, renovation scenario generation, and CEE/MPR calculation tailored to insulation work packages.
- Logiciel PAC (Heat Pump Software) A specialized module for heat pump (PAC) installers that delivers energy performance simulation, equipment-specific scenario generation, and CEE/MPR calculations for heat pump installations.
Quantifiable outcome
- Conversion rate from 1st contact to R1 (first site visit) multiplied by 5x
- +4 more outcomes
Companies that use Kelvin
Customer profileNamed customers13 records
Segments6 records
Ideal customer profiles6 records
Kelvin technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
AI capability7 records
Feature8 records
Kelvin partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core and minor.
- CSTB (Centre Scientifique et Technique du Bâtiment)coreCo-developed with the CSTB. The CSTB (Centre Scientifique et Technique du Bâtiment) is France's leading scientific and technical center for construction and building energy. Their collaboration validates Kelvin's methodology and data models. CSTB logo displayed prominently as 'Co-développé avec le CSTB' across all marketing materials and product interfaces.
- IsopacminorHeat pump selection software company that displays the kelvin° logo on its website and recommends the platform to its users. Mutual referral relationship within the French heat pump software ecosystem.
- INSY Logiciel PACminorHeat pump software company that shows kelvin° as a recommended partner on its website, creating a referral channel for renovation professionals using both platforms.
- Milord Logiciel PACminorHeat pump software company with kelvin° logo displayed on its site, indicating a cross-referral marketing partnership in the French PAC software market.
Scale indicators3 records
Recent moves6 records
Expansion highlights6 records
Kelvin competitors and assessment
Company assessmentDirect peers
- Deepki: Paris-based SaaS that aggregates building energy and ESG data for real estate portfolios. Deepki is comparable to Kelvin because both are French data-aggregation SaaS companies monetizing building-energy intelligence for professionals, differing mainly in their ICP (asset managers vs. renovation contractors).
- BrainBox AI: AI platform that predicts and optimizes HVAC and energy performance in commercial buildings. Comparable to Kelvin as a building-AI SaaS using predictive analytics on building data, though BrainBox focuses on operational optimization while Kelvin focuses on renovation scenario generation.
- Metrikus: Building analytics SaaS that consolidates building performance data for occupiers and operators. Comparable to Kelvin as a data-aggregation SaaS for building professionals with subscription/enterprise GTM, though it targets operational data rather than renovation scenarios.
Broad incumbents
- Hubgrade (ENGIE Solutions): Building energy management and optimization service within ENGIE Solutions. Comparable as a competitor in the French building-energy intelligence space, but with the backing and customer base of an energy major.
- Hellio: Major French energy renovation services firm and Kelvin customer. Comparable because it both competes with and consumes Kelvin's platform, sitting at the intersection of renovation services and tooling that Kelvin addresses.
- Effy: Large French energy renovation platform serving homeowners and pros. Comparable as a customer and potential channel partner for Kelvin, operating in the same renovation value chain with overlap in lead qualification.
- Schneider Electric (EcoStruxure): Global building energy and automation major with a digital platform for energy management. Comparable as the kind of large incumbent that could bundle AI-driven building energy analysis, posing a competitive threat and potential partnership target for Kelvin.
Emerging players
- GreenFlex: French energy and environmental performance consultancy with a data/analytics angle. Comparable to Kelvin as a French energy-data provider, though GreenFlex leans consulting-led rather than SaaS-led.
- Bulldoz (Bulldoz AIR): French SaaS providing estimation and project management for renovation contractors. Comparable to Kelvin in targeting French renovation pros with estimation/project tools, though focused on general renovation cost rather than energy-specific 3CL-DPE scenarios.
- Teksial: French SaaS helping energy renovation contractors structure their commercial activity and subsidy files. Comparable to Kelvin as a directly overlapping vertical SaaS for French RGE renovation pros.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
Kelvin social profiles
Digital presenceKelvin financial estimates
Financial estimateRevenue estimate
Valuation estimate
Kelvin leadership team
Management profileNumber of profiles
Profiles4 records
Kelvin funding detail
Funding detailFunding overview
Funding rounds1 record
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Kelvin 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 Kelvin
What does Kelvin do?
Kelvin (KELVIN TECHNOLOGIES) operates the kelvin° platform, a B2B SaaS solution that uses AI to aggregate property information from a simple address and generate energy performance estimates, 1-3 renovation scenarios, and government subsidy calculations (CEE, MPR) for energy renovation professionals. The platform covers the full commercial workflow from prospect identification and site targeting through lead capture, sales qualification, quote preparation, and financing of the client's remaining contribution.
Is Kelvin a public or private company?
Kelvin is a private company. It is classified as venture growth investor backed and is currently operating.
When was Kelvin founded?
Kelvin was founded in 2021. It employs 11 to 50 people.
Where is Kelvin based?
Kelvin is headquartered in Montreuil, France, in the Europe region.
How does Kelvin make money?
One revenue line is on record: subscription to kelvin° platform.
Who are Kelvin's main competitors?
Direct peers on record are Deepki, BrainBox AI and Metrikus. Broad incumbents are Hubgrade (ENGIE Solutions), Hellio, Effy and Schneider Electric (EcoStruxure). Emerging players are GreenFlex, Bulldoz (Bulldoz AIR) and Teksial.
Does Kelvin have an API?
Yes. Kelvin offers a public REST API at https://app.go-kelvin.com/api/docs with a 'lead' endpoint for retrieving prospect data. API-accessible fields include property information (address, latitude/longitude, BAN identifier, Google Maps link), simulation details, and user-provided data (contact info, fiscal profile, housing type). Authentication method, rate limits, and versioning are not specified in available sources. Developer documentation is at app.go-kelvin.com/api/docs.
What industry is Kelvin in?
Kelvin's product category is Energy Renovation Software. Its primary akta.pro industry code is EDALALAH, Utilities & Energy Management (Meters, Boilers, Chillers). Its NAICS code is 221114 and its SIC code is 3600.