Octopus Energy
The UK's most recommended energy supplier, see their latest deals, green credentials, and smart tariffs.
The UK’s most recommended energy supplier, green, tech driven, and consistently top rated for customer service.
Ofgem’s price cap for Q2 2025 is set at £1,849 a year for a typical dual fuel household, still well above pre 2022 levels.
Octopus Energy has transformed the UK energy market since its 2016 launch. In under a decade it has grown to become one of the UK’s largest domestic energy suppliers, built a globally recognised technology platform (Kraken), and established itself as the standard bearer for customer service in the industry. Its 100% renewable electricity, innovative smart tariffs, and Which? Recommended Provider status make it a starting point for most energy comparisons.
| 6m+ Customers | 4.7★ Trustpilot | 100% Renewable Electricity | Which? Recommended Provider |
About Octopus Energy
Octopus Energy Group operates across 17 countries and manages over 50 million energy accounts globally through its Kraken technology platform. In the UK it supplies domestic and business energy customers, operates renewable generation assets (including its own wind farms and solar installations), and runs some of the most new tariffs in the market, including Agile Octopus (variable half hourly pricing), Intelligent Octopus Go (EV smart charging), and Octopus Flux (for solar battery households).
Octopus Energy Tariffs at a Glance (2026)
| Tariff | Type | Exit Fee | Best For |
|---|---|---|---|
| Flexible Octopus | Variable | None | Standard use, no commitment |
| Octopus Fixed | Fixed 12/24m | £50/fuel | Budget certainty |
| Agile Octopus | Smart variable | None | Flexible households, cheapest off peak |
| Intelligent Octopus Go | Smart EV | None | EV owners, 7–9p/kWh overnight |
| Octopus Flux | Smart solar + battery | None | Solar panel + battery households |
| Cosy Octopus | Smart heat pump | None | Air source heat pump users |
Pros and Cons of Octopus Energy
| ✔ Pros | ✘ Cons |
|---|---|
| UK’s highest rated major supplier: 4.7★ Trustpilot | Agile tariff requires active engagement to maximise savings |
| 100% renewable electricity from own generation assets | Customer growth has stretched support at peak times |
| Most new tariff range in the market | Not always cheapest on a standard fixed deal vs. OVO or EDF |
| Which? Recommended Provider for multiple years | Intelligent tariffs require a compatible smart meter |
| Rapid switching and digital first experience | Appheavy, phone support less prominent |
Octopus Smart Tariffs, Agile, Go, and Cosy
Octopus leads the market on smart tariffs. Agile Octopus prices electricity every half hour based on the wholesale market, during off peak periods (especially overnight or at weekends), prices can fall below 5p/kWh or even go negative. Intelligent Octopus Go offers a guaranteed low overnight rate specifically for EV charging. Cosy Octopus is designed for heat pump households. All require a smart meter and offer savings for flexible energy users. For more on EV charging tariffs, see our EV Chargers guide.
Octopus Energy’s Green Credentials
Octopus matches 100% of the electricity it supplies to renewable sources and crucially, it generates its own renewable power through Octopus Energy Generation, which funds and operates wind and solar assets. This is a stronger green position than suppliers who only buy REGO certificates. For a full comparison of green suppliers, visit our Compare Green Energy page.
How to Switch to Octopus Energy
- Enter your postcode on Switcheroo to compare Octopus alongside all available tariffs.
- Choose your Octopus tariff, standard fixed, flexible, or smart.
- Octopus handles the entire switch digitally. No contact with your old supplier needed.
- 14 day cooling off period applies.
- Most customers report a smooth, fast switch.
Our take: Octopus is the standout choice right now, especially if you’re open to a smart or tracker tariff. Intelligent Octopus Go is one of the best overnight EV charging deals on the market.
- Compare Octopus’s current fixed rate against their Tracker before committing, the Tracker often wins when wholesale is falling
- For simplicity, Octopus Tracker follows the wholesale market with a monthly update, good when prices are falling
- Agile Octopus suits flexible households who can shift usage to cheap windows, excellent for heavy electricity users
- Smart meter installation is often the first step, book it early as slots can be 2-4 weeks out
- If you have or are getting an EV, Octopus Go or Intelligent Octopus Go can cut charging costs by two thirds versus day rates
Getting the Best Deal with Octopus Energy
Octopus has grown from a startup in 2016 to the UK’s largest energy supplier by customer count, overtaking British Gas in 2023. This growth has come through a combination of competitive pricing, technology investment, and acquiring customers from suppliers that failed during the energy crisis. Their Kraken technology platform processes billing, metering, and customer service at scale and has been licensed to energy companies in over 17 countries. Octopus generates renewable electricity through its own solar and wind assets and is investing heavily in UK storage projects. For domestic customers, this operational scale translates into generally reliable billing, fast smart meter installation, and good digital tools, though their phone service has been under pressure as the customer base has grown rapidly.
Octopus Energy’s Market Position
Octopus has built a significant market advantage through its smart tariff range, which is now among the most sophisticated available in the UK retail market. Agile Octopus prices electricity every 30 minutes based on day ahead wholesale market prices, on windy overnight periods, rates can drop below 10p/kWh or even go negative, meaning Octopus pays customers to use electricity. Octopus Go offers a flat cheap rate of around 7.5p/kWh between midnight and 5am, designed specifically for EV overnight charging. Intelligent Octopus Go goes further, integrating directly with compatible EV chargers to automatically schedule charging during the five cheapest consecutive hours. Cosy Octopus is designed for heat pump users, offering cheap rates at optimal heating times. Customers need a smart meter to access any of these tariffs, Octopus offers fast smart meter installation, often within a few weeks.
Frequently Asked Questions
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Is Octopus Energy the cheapest energy supplier?
Octopus isn’t always the absolute cheapest on a standard fixed deal, Ovo Energy or EDF sometimes undercut on unit rate. But Octopus’s smart tariffs (especially Agile and Intelligent Go) offer the potential for significantly lower bills for flexible households. Use Switcheroo to compare Octopus’s current deals with every other supplier at your postcode.
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What's Agile Octopus and how much can it save?
Agile Octopus prices electricity in 30 minute slots based on the wholesale market. At off peak times (typically overnight and at weekends), prices can be 5–10p/kWh, well below the standard unit rate. Prices can even go negative, meaning Octopus pays you to use electricity. Active users who shift usage to cheap periods report savings of 20–40% vs. a standard tariff. A smart meter is required.
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Does Octopus Energy supply 100% green electricity?
Yes. Octopus matches 100% of the electricity it supplies to renewable sources and generates its own renewable power. Its fuel mix disclosure shows 100% renewables. Compare all green energy suppliers on our Compare Green Energy page.
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What's Octopus Intelligent Go for EV owners?
Intelligent Octopus Go is a smart EV tariff that charges your car at a low overnight rate (typically 7–9p/kWh between 11pm–5am) automatically, without needing to set timers. It’s compatible with many EV brands and home chargers. Visit our EV Chargers guide for full setup details and charger recommendations.
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Can I get Octopus Energy as a business customer?
Yes. Octopus for Business supplies SMEs and larger commercial customers. Business tariffs are unregulated. See our Compare Business Energy page for guidance on switching business energy. Octopus has received strong reviews from small business customers in particular.
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How does Octopus handle complaints?
Octopus’s app and website handle most queries instantly. For unresolved issues, escalate via the in app complaints process. Citizens Advice (0808 223 1133) offers independent help. If unresolved after 8 weeks, escalate to the Energy Ombudsman. Octopus’s complaint volumes are notably lower than most large suppliers.
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Is Octopus Energy available with a prepayment meter?
Yes. Octopus serves prepayment meter customers, including smart prepayment meters that can be topped up via the app. Octopus has been vocal about improving the prepayment experience. See our Prepayment Meter Tariffs page for more on PPM options across all suppliers.
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Is Octopus Energy the cheapest supplier in the UK?
Octopus is frequently among the cheapest or near cheapest suppliers for households on standard tariffs, particularly on their Tracker product which moves with wholesale prices. On smart tariffs for EV users, they’re consistently the most competitive. However, “cheapest” changes monthly as suppliers update their rates, and the answer depends on your usage profile. Use Switcheroo to compare current live rates for your consumption level, the cheapest deal for a high electricity usage household may differ from the best deal for a typical household.