# Energy Providers in Spain, User Review Comparison 2026 > Spanish energy suppliers compared by user reviews for 2026: Iberdrola, Endesa, Naturgy, and Repsol ranked by sentiment. No pricing on this page. Updated: July 2026 · By Jules · URL: https://www.how-to-spain.com/energy/providers-comparison Updated July 2026. Based on user-review research, the highest-rated energy provider in Spain is **[Iberdrola](https://www.iberdrola.es) (69.0% positive)**, cited for the widest **renewable and green-tariff lineup** and nationwide reach. **[Endesa](https://www.endesa.es) (67.5%)** follows with broad nationwide bundled electricity and gas coverage backed by the Enel group, and **[Naturgy](https://www.naturgy.es)(66.0%)** holds the strongest reputation specifically for **gas supply**. **[Repsol](https://www.repsol.es) (64.8%)** rounds out the ranking, valued for fuel-station loyalty discounts bundled with its energy account. ## Which Energy Providers in Spain Rank Highest in 2026? The table below ranks the leading energy suppliers in Spain by user sentiment score. Green indicates strong positive sentiment (65%+), amber is moderate (55-64%), and red signals below-average perception (<55%). | # | Provider | Sentiment | | --- | --- | --- | | 1 | Iberdrola | 69.0% | | 2 | Endesa | 67.5% | | 3 | Naturgy | 66.0% | | 4 | Repsol | 64.8% | Source: User review research, July 2026. ## What Do Users Say Is Good and Bad About Spanish Energy Providers? Across the four major suppliers, the most consistently surfaced positive and negative characteristics reveal what users associate with each brand for energy in Spain. ### What reviewers praise - +Widest renewable and green-tariff lineupIberdrola - +Nationwide bundled electricity and gas coverageEndesa - +Traditional leader specifically in gas supplyNaturgy - +Fuel-station loyalty discounts bundled with energyRepsol - +Backed by an international parent groupEndesavia Enel - +Combined electricity and gas billing simplifies adminNaturgyEndesaRepsol ### What reviewers criticise - −Premium pricing on some green tariff tiersIberdrola - −Customer service quality reported to vary by regionEndesa - −Electricity market share smaller than the two largest suppliersNaturgyRepsol - −Fewer green-tariff options than the market leaderRepsol ## What Does Each Energy Provider Score and Why? Below is a detailed breakdown of every leading energy provider in Spain, ordered by sentiment score. Each card shows the positive and negative characteristics users associate with each brand. ### Iberdrola 69.0% sentimentIberdrola is Spain's largest electricity utility by generation capacity. Users consistently describe it as the leading renewable-focused supplier, with the broadest green-tariff lineup and nationwide reach, at a modest price premium on some tariff tiers. #### Top positives - +Largest electricity supplier in Spain by generation capacity - +Strong renewable and green-tariff product range - +Nationwide coverage including islands - +Well-established brand trusted by Spanish consumers #### Top negatives - −Premium pricing on some green tariff tiers - −Gas product range narrower than Naturgy ### Endesa 67.5% sentimentEndesa is one of Spain's largest electricity and gas suppliers, part of the international Enel group. Users describe it as a reliable, broad-coverage option for bundled electricity and gas, with service quality varying somewhat by region. #### Top positives - +Nationwide electricity and gas coverage - +Backed by the international Enel group - +Broad tariff range including bundled electricity and gas - +Established brand with wide name recognition #### Top negatives - −Customer service quality reported to vary by region - −Green tariff naming less prominent than Iberdrola ### Naturgy 66.0% sentimentNaturgy is the traditional leader in gas supply in Spain and has built a growing electricity business. Users describe it as the go-to choice when gas is the primary need, with a smaller electricity footprint than the two largest suppliers. #### Top positives - +Traditional leader in Spanish gas supply - +Growing electricity supply business - +Combined electricity and gas billing - +Long-established brand in the Spanish gas market #### Top negatives - −Electricity market share smaller than Iberdrola or Endesa - −Green electricity lineup less established ### Repsol 64.8% sentimentRepsol, best known for fuel retail, has grown into a strong all-round energy challenger with combined electricity, gas, and fuel-station loyalty discounts. Users describe it as a good value option for drivers, with a smaller network footprint than the two largest incumbents. #### Top positives - +Combined electricity, gas, and fuel-discount products - +Loyalty program tied to Repsol fuel stations - +Growing challenger in the electricity and gas market - +Recognized national brand #### Top negatives - −Smaller electricity network reach than Iberdrola or Endesa - −Fewer green-tariff options than Iberdrola ## How Should You Pick the Right Energy Provider in Spain? - **Green electricity priority**: choose Iberdrola (69.0%) for the widest renewable and green-tariff lineup. - **Bundled electricity and gas, nationwide coverage**: choose Endesa (67.5%), backed by the international Enel group. - **Gas is your primary need**: choose Naturgy (66.0%), the traditional leader specifically in Spanish gas supply. - **Drivers wanting fuel-station discounts too**: choose Repsol (64.8%) for combined electricity, gas, and fuel loyalty savings. ## Related Guides [### Best Energy Providers in Spain Ranked suppliers with real CTAs.](/energy/providers)[### Energy Price Research Illustrative per-kWh bands, no sentiment.](/energy/providers-price-research) ## Frequently Asked Questions ### Which energy provider in Spain has the best user reviews in 2026? As of July 2026, Iberdrola leads with a 69.0% positive sentiment score, repeatedly cited for the widest renewable and green-tariff lineup and nationwide reach. Endesa (67.5%) follows, praised for nationwide bundled electricity and gas coverage backed by the Enel group, and Naturgy (66.0%) is the top pick specifically for gas. Repsol (64.8%) rounds out the ranking, valued for fuel-station loyalty discounts bundled with its energy account. ### Which Spanish energy supplier is best for green electricity? Iberdrola (69.0%) has the strongest reputation for renewable-backed green tariffs and the broadest green-tariff product range of the four major suppliers. Endesa (67.5%) also sells renewable-backed options. All four suppliers' green tariffs must carry a CNMC-supervised Garantia de Origen certificate confirming the electricity sold was generated from renewable sources, so the certification basis is the same across suppliers; the differentiator is product depth, such as Iberdrola's Energy Wallet letting customers pick the specific renewable plant behind their contract (source: CNMC guarantees-of-origin registry, as of July 2026). ### Which Spanish energy supplier is best for gas? Naturgy (66.0%) is the traditional leader in gas supply in Spain and carries the strongest reputation specifically for gas contracts, though Endesa (67.5%), Iberdrola (69.0%), and Repsol (64.8%) all also sell combined electricity and gas contracts. ### Which Spanish energy supplier is best for combined electricity, gas, and fuel savings? Repsol (64.8%) stands out specifically for bundling electricity and gas with loyalty discounts at Repsol fuel stations, which makes it a strong pick for households that also drive frequently. Endesa (67.5%) and Iberdrola (69.0%) offer broader nationwide coverage without the fuel-loyalty angle. --- Source: https://www.how-to-spain.com/energy/providers-comparison Last updated: Updated: July 2026 Format: LLM-readable Markdown twin (.md) of the canonical HTML page.