Alterna: active energy supplier in France - June 2025

Alterna is a supplier of both electricity and gas, catering to residential and professional customers. It offers four electricity plans with the most affordable being the "100% French Green Electricity" plan, priced at 4% below the regulated tariff. For gas, Alterna features four offers but does not currently market gas contracts widely; its cheapest gas plan, "Gaz Zen 1 an," is 1% less expensive than the reference gas price. Alterna stands out for its commitment to green energy, sourcing electricity from 330 renewable farms and providing 100% biomethane gas options. With a strong regional presence and competitive pricing, Alterna serves over 30,000 customers with award-winning green energy solutions.

Simulation based on an average profile: electricity consumption of 6000 kWh per year (4000 kWh peak hours and 2000 kWh off-peak hours) with a 6 kVA meter on the Peak/Off-Peak option, and gas consumption of 11,200 kWh per year in zone 1 for heating use.

Alterna energy offers in France in June 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 offers multiple contact options including telephone and email, ensuring accessible communication channels. The main customer service telephone line has extended hours during weekdays and weekends. Subscription-related contacts are available only during standard business hours and dedicated to specific requests. Furthermore, Alterna maintains a physical customer service address. However, there is no clear information regarding English-speaking support. The provider caters distinctly to professionals and private clients with different contact numbers, reflecting a structured communication approach.

How to subscribe an Alterna energy plan in France?

To subscribe to Alterna, you can contact their subscription service by phone at 05 49 60 54 58. The phone line is available from Monday to Friday, 9 a.m. to 5 p.m. This option allows you to easily get assistance from a representative to choose an energy plan suited to your needs.

For an online subscription, you will need to go directly to the official Alterna website and follow their subscription process. This ensures you can complete your registration at your convenience and access all relevant information about their energy offers.

• Documents required to subscribe to Alterna
• Proof of identity (e.g., ID card or passport)
• The full address of the property
• Your electricity or gas meter reference (e.g., the PDL for electricity or PCE for gas)
• A recent energy bill (if available)
• Your bank account details for direct debit payments

About Alterna

Alterna is an energy supplier established in 2005 through the unification of 50 Local Distribution Companies (ELDs) across France. These historic suppliers, each holding local monopolies in their territories, decided to join forces in order to compete more effectively against EDF. The ELD Sorégies, based in Poitiers, assumed leadership of this alliance from the outset.

Alterna maintains a strong presence in France with a customer service center located in Poitiers and a network of 60 local agencies, which correspond to the original ELDs’ local offices. This territorial anchoring allows Alterna to serve professional clients both within their traditional service areas and across the broader Enedis network.

One of Alterna's distinguishing features is its genuine commitment to renewable energy. The supplier sources its electricity from a selection of 330 renewable production farms, providing customers options including photovoltaic, wind, and hydraulic energy. Moreover, Alterna offers biomethane gas sourced from methanization farms chosen by the clients themselves. Notably, 100% of Alterna’s investments in energy production are dedicated to renewable sources, and the company holds the VertVolt "very committed" label awarded by ADEME.

Despite being relatively small and having limited brand recognition, Alterna has demonstrated consistent growth since its inception. The company adheres to transparency by committing to the 13 best practices set by the French Energy Regulation Commission (CRE), ensuring clear and reliable communication with its customers.