Curb6

What Curb6 does

Curb6 is a Paris-based, pre-launch carbon management platform founded in 2020 by Didier Negiar. The company offers a self-serve web product at curb6.com comprising four multi-modal emissions calculators (Plane, Bus, Car, Train), an Airport Carbon Footprint Calculator covering 200+ airports with IATA codes, altitude and city data, and a Country Carbon Footprint Data module providing CO2 emissions, air pollution, PM2.5 exposure, and energy statistics for 130+ countries. Its underlying technology relies on "scientifically proven formulas" for emissions estimation rather than machine learning, with structured inputs covering flight class, vehicle energy type, passenger count, and route connections. The platform is entirely free at the calculator level, with no pricing tiers, subscription plans, or enterprise contracts disclosed.

The company's go-to-market is product-led growth: acquisition is driven by SEO-optimized calculator and country/airport landing pages, educational blog content, and organic LinkedIn and Twitter presence, with an early-access email signup capturing leads ahead of the full platform launch. Curb6 currently has no monetization in market; the only forward revenue stream is a planned Carbon Offsetting Service that would allow users to automatically compensate monthly emissions, leveraging a core partnership with Gold Standard for certified offsetting projects. Until that service launches, Curb6 directs users externally to Gold Standard certified projects rather than transacting in-house.

The intended customer base is horizontal: environmentally conscious individuals seeking personal footprint visibility, and companies seeking to measure, report, and reduce operational and travel emissions. However, the company has disclosed no named customers, no revenue, no funding rounds, and a headcount of only 1-10, placing it firmly in pre-revenue, pre-launch operational mode. Operational geographies implied by the airport and country databases span Europe, the Americas, Asia Pacific, the Middle East, and Africa, though distribution is exclusively through the owned curb6.com website with no mobile app, marketplace presence, or field sales organization identified.

Name

Curb6

Legal name

Curb6

Website

https://curb6.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

Curb6 is a Paris-based carbon management platform offering free self-serve web calculators for plane, bus, car, and train emissions, plus airport and country-level CO2 data, targeting individuals and businesses. A paid offsetting service via Gold Standard is planned but not yet launched.

Ownership category

akta.pro rank

Product category

Carbon Management Software

akta.pro primary industry

Emissions Factors, LCA & Product Carbon Footprint (PCF) Platforms (EUABAEAD)

akta.pro secondary industry

Decarbonization Strategy & Marginal Abatement Cost Curve (MACC) Advisory (EUABAKAC)

Keywords

• Carbon footprint calculators
• Carbon offsetting platform
• Emissions tracking software
• Sustainability measurement tools
• Climate action solutions

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Markets served

GTM type

B2C

Offering type

Software

Cost components

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

Revenue model

1. Carbon Offsetting Service (Planned): Curb6 plans to provide a carbon offsetting service where users can compensate for their calculated emissions. Until the service launches, the platform directs users to Gold Standard certified offsetting projects. Revenue mechanics are not yet disclosed but the model suggests a marketplace or transaction-fee approach.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Curb6 provides free web-based carbon footprint calculators for four transport modes (plane, bus, car, train), an Airport Carbon Footprint Calculator covering 200+ global airports, and a Country Carbon Footprint Data module covering 130+ countries, all using scientifically proven CO2 calculation algorithms. A Carbon Offsetting Service, planned for future launch, will allow users to compensate calculated emissions via Gold Standard certified climate protection projects. The platform targets both environmentally conscious individuals and businesses seeking to measure and reduce travel-related emissions.

Product overview

Curb6 is a carbon neutrality platform offering a unified set of tools for calculating, analyzing, and offsetting carbon dioxide emissions. The core product suite includes four travel carbon footprint calculators (Plane, Bus, Car, and Train) that rely on scientifically proven formulas for accurate emissions estimation. The platform also provides an Airport Carbon Footprint Calculator covering 200+ airports worldwide, enabling users to calculate emissions for specific flight routes, and a Country Carbon Footprint Data module providing environmental statistics for nations globally. A Carbon Offsetting Service is under development, pending launch, which will enable users to offset emissions through Gold Standard verified projects. The platform also includes an educational blog with guides on carbon reduction strategies. All calculators are accessible as a comprehensive carbon management toolkit, with users able to register for early access to the full platform.

Differentiator

Problem solved

Functional benefit

Products and services

• Plane Calculator Free web-based carbon dioxide footprint calculator for air travel, supporting parameters for passenger count, trip type (return/one-way), seating class (economy/business/first), departure/destination airports, and connection preferences. Designed for environmentally conscious individuals and businesses calculating flight-related emissions.
• Bus Calculator Free web-based carbon dioxide footprint calculator for bus travel, supporting parameters for passenger count, trip type, energy source (diesel/hybrid/natural gas/electric), and route details. Built for users quantifying emissions from bus journeys.
• Car Calculator Free web-based carbon dioxide footprint calculator for car travel, supporting parameters for passenger count, energy type (petrol/diesel/hybrid/bio gas/natural gas/electric), vehicle type (compact/medium/minivan/SUV), and fuel consumption. Designed for users measuring emissions from personal or business car travel.
• Train Calculator Free web-based carbon dioxide footprint calculator for train travel, supporting parameters for energy type (high-speed electric/electric/partially diesel/diesel) and route details. Built for users measuring emissions from rail journeys.
• Airport Carbon Footprint Calculator Web-based tool enabling users to select a departure airport and calculate the carbon footprint of all common flight routes from that airport, covering approximately 200+ airports globally with IATA codes, city locations, and altitude data. Targets travelers and researchers investigating specific flight route emissions.
• Country Carbon Footprint Data Web-based environmental impact database providing country-level CO2 emissions, air pollution mortality rates, PM2.5 exposure data, energy statistics, and territorial information for 130+ countries worldwide. Designed for users researching national-level environmental performance.

Quantifiable outcome

• Accurate multi-modal carbon footprint calculation for individuals and businesses

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Gold StandardcoreGTM or Marketing PartnerCurb6 recommends Gold Standard certified carbon offsetting projects to its users as the trusted offsetting partner. The company states: 'We do not yet provide our own offsetting, until we launch, we invite you to offset your carbon footprint by giving to one of the Gold Standard trusted projects.' Gold Standard is described as one of the most trusted carbon offset certification programs, listing hundreds of verified carbon reduction projects. This is a core partnership as it provides the offsetting pathway for Curb6's ultimate value proposition of going carbon neutral.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Watershed: Watershed is a US-based enterprise carbon accounting and reporting platform that helps large companies measure, report, and reduce emissions across all scopes including travel. It serves as the high-end incumbent benchmark that defines what a scaled, venture-backed carbon platform looks like versus Curb6's current consumer-scale stage.
• Carbon Trust: Carbon Trust is a global sustainability consultancy that helps organizations measure, reduce, and certify their carbon footprint, including business travel emissions. It is comparable to Curb6 on the advisory and measurement side and is a credible incumbent for any corporate customer evaluating carbon tools.
• Patch: Patch is a leading carbon credit API platform that enables businesses to embed carbon offsetting directly into their products. While more developer-focused than Curb6, it competes for the same end demand (carbon offset transactions) and is a credible threat should Curb6 attempt to move upstream into B2B offsetting infrastructure.
• Persefoni: Persefoni is an enterprise climate management and carbon accounting platform used by large corporations for Scope 1-3 measurement. While enterprise-focused and far larger than Curb6, it represents the upside trajectory for any carbon accounting platform that successfully moves upmarket into corporate sustainability reporting.
• Greenly: Greenly is a Paris-based carbon accounting platform that helps SMBs and enterprises measure and reduce their carbon footprint across operations including business travel. It overlaps directly with Curb6 on travel emissions measurement and is geographically close in the Paris ecosystem, making it a strong incumbent competitor.
• South Pole: South Pole is a major Zurich-based carbon credit developer and advisory that both develops offset projects and helps companies decarbonize. Comparable to Curb6 on the offsetting side, it represents the incumbent that owns the supply side of carbon credits that Curb6 currently routes to via Gold Standard.

Direct peers

• ClimateHero: ClimateHero is a Sweden-based platform offering free carbon footprint calculators for individuals and businesses, combined with offsetting via certified projects. It is highly comparable to Curb6 in product (free calculator funnel), customer base (consumers and SMEs), and sustainability messaging.
• Doconomy: Doconomy offers consumer-facing carbon footprint tracking and offsetting, including integrations with banks and payment networks. It targets the same environmentally-conscious consumer and embeds within financial products, making it a comparable peer for Curb6's planned offsetting-and-share features.
• Klima: Klima is a Berlin-based consumer carbon footprint app that lets individuals measure, reduce, and offset their emissions through a subscription model. It is a direct competitor to Curb6 in the consumer carbon calculator and offsetting category, targeting the same environmentally-conscious individual persona with a mobile-first experience.

Emerging players

• Cloverly: Cloverly provides a carbon offset and emissions calculation API used by travel and ecommerce platforms to offer offsetting at checkout. It is an emerging comparable in the carbon calculation-plus-offsetting space and represents a possible partnership target or competitive threat as Curb6 develops its API roadmap.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/curb_6
• LinkedInlinkedin.com/company/curb6

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Curb6