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 for individuals, with the least expensive being the 100% French green electricity plan, priced 4% below the regulated tariff. For gas, Alterna provides five fixed-price offers, including green gas options, though its cheapest gas plan is slightly above the reference price. Known for its strong commitment to renewable energy, Alterna sources electricity from 330 renewable farms and offers 100% biomethane gas. Despite its modest size, the supplier has a growing customer base and maintains a local service presence with 60 agencies across France.

The simulation corresponds to an average consumption profile: electricity – 6,000 kWh annually (4,000 kWh peak hours and 2,000 kWh off-peak) with a 6 kVA meter strength; gas – 11,200 kWh annually in zone 1 for heating use.

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 offers various contact methods including telephone and email for both subscriptions and customer service. The main customer service line is available with extended hours on weekdays and weekends. Subscription service operates on more restricted hours during weekdays. Different contacts exist for professionals and private clients, indicating targeted communication channels. The provider has a customer service based in Poitiers but does not specify any English-speaking support. Overall, the contact options cover key needs, balancing availability and client segmentation.

How to subscribe an Alterna energy plan in France?

To subscribe to an energy plan with Alterna, you can contact their subscription service by phone at 05 49 60 54 58, available Monday to Friday from 9 AM to 5 PM. Their team will guide you through the process and provide all necessary information to finalize your subscription.

Online subscriptions for Alterna are done directly through their official website. Visit their website to explore energy offers and complete your subscription securely.

• Required documents to subscribe to Alterna
• The address of the property you wish to supply with energy.
• The PDL (Point of Delivery) or PCE (Point of Consumption) number listed on your electricity or gas bill.
• A bank account detail (RIB) for automatic payments.
• Contact information, such as your phone number and email address.

About Alterna

Alterna is an electricity and gas supplier founded in 2005 through the alliance of 50 Local Distribution Companies (ELDs), which were historical suppliers holding local monopolies in their respective territories. Rather than competing individually against EDF, these ELDs chose to join forces, with the Poitiers-based ELD, Sorégies, taking the lead from the group's inception.

Maintaining strong market shares for professional clients has been a strategic priority for Alterna, allowing it to operate effectively both within traditional local service areas and on the broader Enedis grid. The company retains a firm foothold in the French energy market, featuring a customer service center located in Poitiers and an extensive network of 60 agencies representing the local branches of each ELD partner.

Alterna stands out for its unwavering commitment to renewable energy production. It sources its green electricity from a carefully selected group of 330 renewable energy farms, including photovoltaic, wind, and hydraulic sites. Additionally, it offers biogas options, enabling customers to choose their preferred methanation farm. Notably, 100% of Alterna's investments in energy production are dedicated to renewables. The supplier also holds the VertVolt label at the “very committed” level, awarded by ADEME, emphasizing its ecological engagement.

Despite its relatively small size and limited brand recognition, Alterna has shown consistent growth since its establishment. The company operates as a Société par Actions Simplifiée with a social capital of 719,965.92 euros, and counts over 30,000 customers as of January 1, 2025. Alterna is also committed to transparency and adheres to the 13 best practices outlined by the Energy Regulation Commission.