Alterna: active energy supplier in France - July 2025

Alterna is a supplier of both electricity and gas, serving both residential and professional customers. It offers four electricity plans with the least expensive being the 100% French green electricity option, which is priced 4% below the regulated tariff. For gas, Alterna provides five plans, with the cheapest being the Gaz Zen 1-year fixed price offer, slightly above the benchmark gas price by 1%. Alterna is strongly committed to green energy, sourcing electricity from over 330 renewable farms and offering 100% biomethane gas. Despite its relatively small size, it distinguishes itself with competitive prices and certified green energy solutions.

Simulation for average consumption profiles: electricity—6,000 kWh/year (4,000 kWh peak hours, 2,000 kWh off-peak) with a 6 kVA meter and peak/off-peak option; gas—11,200 kWh/year in zone 1, used for heating.

Alterna energy offers in France in July 2025

The 3 electricity offers from Alterna

The 4 gas offers from Alterna

Alterna reviews: what customers are saying?

How to contact Alterna in 2025: phone, email, online

Alterna provides multiple contact options, including phone and email, for both subscriptions and customer service. The phone lines have extended hours on weekdays and Saturdays, with subscription support available during standard business hours. Certain contacts are specifically reserved for professionals or subscriptions. The service client is based in Poitiers and does not clearly specify the availability of English-speaking support. Overall, the provider offers a diverse yet segmented customer assistance network.

How to subscribe an Alterna energy plan in France?

To subscribe to an energy offer with Alterna, you can reach their subscription service by phone at 05 49 60 54 58, available from Monday to Friday, 9 AM to 5 PM. For convenience, you can also email them at [email protected].

If you prefer online subscription, you can directly register through the provider’s website. Simply visit Alterna Energie's official site to proceed.

• Documents required to subscribe to Alterna
• A valid identity document
• Your IBAN for direct debit setup
• The PDL (electricity) or PCE (gas) number of your meter, found on your latest bill
• Address of the property to supply
• The name of the previous occupant, if available

About Alterna

Alterna is an electricity and gas supplier established in 2005 through the merger of 50 Local Distribution Companies (ELD) that were historical monopolies in their respective service areas. The company was led from its inception by Sorégies, an ELD based in Poitiers.

Alterna retains a strong foothold in the French energy market by preserving the market shares of its ELD partners, allowing it to serve both their traditional territories and the wider Enedis network. This structure provides Alterna with a unique dual presence that blends local expertise with national reach.

The company’s customer service is centrally based in Poitiers, supported by a network of 60 agencies that correspond to the local offices of each ELD. This wide-reaching territorial presence reinforces its commitment to maintaining customer proximity and operational responsiveness throughout France.

Alterna demonstrates a clear and deep commitment to renewable energy. Their electricity is sourced from a carefully selected portfolio of 330 renewable energy farms, including photovoltaic, wind, and hydroelectric power. Beyond electricity, Alterna offers biogas sourced from methanation farms chosen by customers, dedicating 100% of its energy production investments to renewable sources. The supplier’s efforts are recognized with the ADEME’s VertVolt label at the highest level of engagement.

Despite being relatively small and less widely known, Alterna has shown consistent growth since its foundation. It has also been recognized in the industry with the Selectra 2024 Award for Best Green Electricity and Gas Provider, reflecting its dedication to green energy combined with competitive pricing and innovative offerings.

Legally, Alterna is a Société par Actions Simplifiée with a social capital of 719,965.92 euros and had more than 30,000 clients as of January 1, 2025. The company has committed to upholding the 13 best practices outlined by the French Energy Regulatory Commission for transparency, ensuring a responsible and customer-focused approach to its operations.