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The Diag Decarbonaction Program with Altopi

Access preferential rates for your first carbon footprint assessment with Altopi through the Diag Decarbonaction program. This article covers everything you need to know about the Diag Decarbon'action program.

Eloïse GRENIER
Publié le  
October 1, 2026
Mis à jour le  
10/1/2026
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What is the Decarbon’action Diagnostic?

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The Decarbon’action Diagnostic is a support program for businesses transitioning to eco-friendly practices. It helps companies start reducing their carbon footprint.

The program is co-funded by ADEME and implemented by BPI France in partnership with the Association Bilan Carbone.

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Decarbon'action Diagnostic Program

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With the help of qualified experts, the Decarbon’action Diagnostic allows you to:

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- Conduct a carbon assessment

- Develop an action plan to decarbonize your business

- Get a CSR roadmap to help you implement your first 10 high-impact actions within your company and with your stakeholders

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The goals of the Decarbon’action Diagnostic are to:

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- Reduce business energy consumption

- Limit business dependence on fossil fuels

- Build internal expertise in managing your carbon footprint

- Raise employee awareness to make them active participants in the company's shift toward sustainability

- Improve the company's image with stakeholders and customers

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Are you eligible for the Decarbon’action Diagnostic program?

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Your company is eligible if:

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- You have fewer than 500 employees

- You have never conducted a GHG assessment

- You are up to date with your tax and social security contributions

- You have been in business for at least one year

- You are not considered a company in difficulty under European regulations

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How much does the Diag Decarbon’action service cost?

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- €4,000 excl. tax for companies with fewer than 250 employees (based on an initial cost of €10,000, meaning a €6,000 subsidy)

- €6,000 excl. tax for companies with 250 to 499 employees (based on an initial cost of €10,000, meaning a €4,000 subsidy)

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What does the Diag Decarbon’action program involve?

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The Diag Decarbon’action support program lasts 12 days and is divided into 3 phases:

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- Phase 1: Calculating your Scope 1, 2, and 3 carbon footprint

- Phase 2: Co-creating a plan to reduce your company’s greenhouse gas emissions

- Phase 3: Implementing your first actions within your company and with your ecosystem (clients, suppliers, investors, etc.)

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Altopi: your Diag Decarbon’action expert

Selected by ADEME, the Association Bilan Carbone, and BPI, ALTOPI was chosen for our expertise in corporate carbon footprint reduction, our teaching skills, the relevance of our approach, and our commitment.

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We support you through every phase of the project to guide your low-carbon transition:

- We calculate your company’s carbon footprint (Scope 1, 2, and 3)

- We work with you to co-create a plan to reduce your company’s main greenhouse gas emissions

- Developing a roadmap

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Get in touch!

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