Octopus Energy OVO Energy (November 2026)
Overall comparison
Octopus Energy is our pick on customer ratings, Which? scores and app ratings, while OVO Energy answered calls faster and replied to more emails within two days.
Octopus Energy comes out ahead on most of the evidence here. It has the higher Trustpilot rating (4.8 against 4.7), a higher Which? total score (74 against 61) and higher app-store ratings on both iPhone and Android. Its Flexible Octopus tariff is also £8 a year cheaper than OVO's Simpler Energy, although that works out at only about £1 a month. OVO's main strength is speed of contact, because it answered calls faster on average and replied to more emails within two days. If quick replies by phone or email matter most to you, OVO is worth a closer look.
About Octopus Energy and OVO Energy
Who are Octopus Energy?
Octopus Energy is the household energy brand of Octopus Energy Group, which describes itself as a global clean energy tech business. In June 2025 the group said its retail brand served over 9 million households worldwide, with operations in 32 countries. Which? groups Octopus with OVO as relative newcomers that have joined the long-established big suppliers.
The company runs on its own technology platform, Kraken. The group also licenses Kraken to other energy firms such as EDF, E.ON and Origin Energy. Octopus says its aim is to end reliance on fossil fuels in power, heating and transport, and to reward customers for greener choices. This is why so much of its business is built around smart meters and home technology.
Octopus was named a Which? Recommended Provider for energy for the ninth year in a row in February 2026. In 2025 it won three Uswitch Energy Awards: Customer Service, Value for Money and Overall Customer Satisfaction.
Products & services
Awards & recognition
Who are OVO Energy?
OVO Energy Limited is based in Bristol. According to Which?, it became one of the large household suppliers when it took over from SSE Energy Services as a domestic supplier. It sits within a wider OVO Group of brands. OVO's own terms name Boost as another group brand, and Boost customers can't use OVO's Beyond rewards.
OVO's green approach centres on how it buys electricity rather than on renewable certificates. It stopped using REGO certificates as standard in 2023. Instead, it says it prefers to buy directly from renewable generators and to invest in new, independent renewable power. OVO has held Which? Recommended Provider status in the past. It is not among the four energy companies named for 2026.
Products & services
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Tariffs and pricing
The lowest annual estimate shown for Octopus is Flexible Octopus, a variable tariff at £1,664 a year. OVO's lowest is Simpler Energy, also a variable tariff, at £1,672 a year. That makes Octopus £8 a year cheaper, or about £1 a month, which is a small gap. Neither has a fixed term and both have a £0 exit fee, so you can leave without a charge, but their rates can go up or down while you are on them.
Fixed deals cost more than these variable tariffs, but in return they hold your unit rates for the contract term. Octopus's cheapest fixed deal is Octopus 18M Fixed October 2026 v7 at £1,848 a year on an 18-month contract with a £150 exit fee. If that feels like too long a commitment, Octopus 12M Fixed October 2026 v8 costs £1,899 a year for 12 months with a £100 exit fee. You would pay about £51 a year more for the shorter tie-in and lower fee.
OVO's cheapest fixed deal is 1 Year Fixed + Complete Cover 29 October 2026 at £2,027 a year, a 12-month contract with a £100 exit fee. Because it comes bundled with OVO's Complete Cover home cover, it is mainly relevant if you want that cover too. The plain 1 Year Fixed 29 October 2026 costs £2,031 a year on the same term and fee. Octopus's cheapest fixed deal is £179 a year (about £15 a month) lower than OVO's, and its 12-month deal is £128 a year lower. All the deals priced here are paid by monthly Direct Debit.
Octopus Energy and OVO Energy: Tariff Options
Octopus Energy tariffs
For most homes, the choice is between Flexible Octopus, the standard variable tariff, and a fixed deal. The fixed deals listed here run for 12 months or 18 months. The shorter deal ties you in for less time, while the longer one holds your rates for longer. Each has its own exit fee, shown in the price table. Flexible Octopus has no fixed end date, so it suits households who may want to move.
The rest of the range rewards homes that can shift when they use electricity or that own particular equipment: - Octopus Go and Intelligent Octopus Go give cheap overnight hours to electric car drivers. - Cosy Octopus is built around heat pumps and other electric heating, and Snug Octopus around storage heaters. - Agile Octopus and Octopus Tracker follow the wholesale market. Bills can fall quickly when prices drop, but they can also rise sharply. - Octopus Flux and the Outgoing Octopus export tariffs suit homes that generate or store power. Almost all of these need a smart meter that sends half-hourly readings. New customers usually join a standard tariff first.
Octopus runs its smart import tariffs as a beta programme, so things may not always work first time. Under its smart tariff terms, once you join a smart tariff you can't move to a different one for 30 days. If you switch back to a standard tariff, you can't rejoin a smart tariff for 30 days. Octopus is also signing households up to Octopus Shape Shifters, which it describes as cheaper electricity nearly all day in return for using some energy outside a few peak hours. It also says a new Charge Pack add-on can manage a home battery around your import tariff.[1][2][3]
Eligibility
Octopus customer who owns or leases an electric car and charges it at home; no home charger needed; A compatible smart meter sending half-hourly readings; If you export, only certain export tariffs can be paired with Go
Eligibility
Octopus customer with a compatible smart meter sending half-hourly readings
Eligibility
Octopus customer with a working smart meter sending half-hourly readings; Economy 7 meters need resetting to a single register; Leaving during the 12-month term means a 9-month wait to rejoin; leaving at the end without renewing does not
Eligibility
A heat pump (air or ground source), electric boiler or electric radiators, installed and working; Octopus decides which other systems qualify; Supplied by Octopus, with a SMETS2 or Secure SMETS1 smart meter sending half-hourly readings
Eligibility
You must be the Octopus account holder and live at the property. You need electric night storage heaters controlled by the auxiliary load control switch (ALCS) in a SMETS2 smart meter, set up with a compatible ALCS calendar. Not every SMETS2 meter works. Half-hourly readings are needed. You let Octopus control when your heaters charge, along with anything else on the same circuit, such as an immersion heater. Octopus also gets sole demand-response rights, so you can't join other flexibility schemes.
Eligibility
Already on an Octopus import tariff and the Outgoing Octopus export tariff; Solar panels and a home battery installed and working, fitted by any installer; Smart meter for import and export with half-hourly readings, plus an export MPAN; MCS certificate for the solar system and G98/G99 certification from your network operator; Feed-in Tariff export payments stop, and you tell any other FiT supplier; generation payments continue; You schedule your battery's charging and discharging yourself
Eligibility
Octopus customers on a compatible import tariff: any standard tariff such as Flexible Octopus, but only certain smart tariffs. New customers start on an interim tariff. You need a smart meter that sends half-hourly export data (almost all SMETS2 and most SMETS1 meters) and a new export MPAN from your network operator, which can take 1–4 weeks. Octopus usually asks for your MCS certificate, plus the network operator notification form and its response. You can't receive Feed-in Tariff export payments at the same time, so you opt out of deemed export, but generation payments continue. If your FiT payments started in the last 12 months, you can't switch yet.
OVO Energy tariffs
OVO's main choice is between Simpler Energy, its standard variable tariff, and a fixed deal. Both fixed editions listed here run for 12 months. So the decision is less about contract length and more about whether you want home cover with your energy, because one version comes bundled with Complete Cover. Taking the bundle means signing up for home cover as well as energy, so it only makes sense if you want that cover.
For electric car drivers, Charge Anytime is an add-on to OVO's eligible electricity tariffs rather than a separate tariff. You stay on your home tariff and OVO schedules your charging for the cheapest and greenest times. Smart charging is first billed at your normal rate, then OVO credits your account the following month. The add-on is only open to existing pay monthly customers paying by Direct Debit who have a compatible EV or charger and a suitable smart meter. You can pay as you go or choose a monthly plan that includes a home charging mileage allowance and a public charging voucher.
Eligibility
A compatible EV or charger , a smart mete r , and an OVO account. if you have solar PV installed at your home, you must have a Solar Compatible Charger. have a Compatible EV or Charger with a working internet connection. have a compatible electricity smart meter that communicates half-hourly data to OVO – currently the main types of smart meters that work with Charge Anytime are SMETS2 meters by any manufacturer, and SMETS1 meters manufactured by Secure.
- [1] Octopus Energy: smart tariff terms
- [2] Octopus Energy: Octopus Shape Shifters
- [3] Octopus Energy: Charge Pack add-on
- Octopus Energy — Octopus Go
- Octopus Energy — Agile Octopus
- Octopus Energy — Octopus Tracker
- Octopus Energy — Cosy Octopus
- Octopus Energy — Snug Octopus
- Octopus Energy — Octopus Flux
- Octopus Energy — Outgoing Octopus
Customer reviews
On Trustpilot, Octopus scores 4.8 from 911,202 reviews and OVO scores 4.7 from 309,371 reviews, so both ratings rest on a very large number of reviews. The difference becomes clearer below the headline score. 90% of Octopus reviews are five-star and 3% are one-star, against 78% and 9% for OVO. Overall, 4% of Octopus reviews are negative, compared with 10% for OVO.
Octopus reviewers talk most about customer service, staff and response times. Many describe staff as knowledgeable, polite and helpful on the phone, and say the website and app are easy to use when changing tariffs or setting up services. Criticism centres on booking appointments, repeated estimated bills and slow progress on complex meter problems, and a few people say promised call-backs never came. Octopus replies to 97% of negative reviews, typically within a week.
OVO reviewers also focus on service and staff, along with problem solving, communications and billing. Many describe advisers as friendly and patient with tricky account set-ups and billing questions, and they praise engineers who arrive on time and explain the work clearly. The main frustrations are long phone waits, difficulty reaching a person quickly, and email replies or automated chat that did not fix urgent problems. OVO replies to 99% of negative reviews, typically within 24 hours.
The Which? total score is 74 for Octopus and 61 for OVO. In the Which? customer survey, Octopus scored 4 out of 5 for overall customer service, ease of contacting and clarity of statements, while OVO scored 2 out of 5 on each. Both did well in the separate Which? supplier assessment of help for those who need it, with 10 out of 10 for Octopus and 9 out of 10 for OVO.
Mobile apps
Both apps list 1,000,000+ installs on Google Play, and both have been updated recently on iPhone and Android. Octopus is better rated on both platforms: 4.8 from 268,000 App Store ratings against OVO's 4.6 from 18,000, and 4.3 from 47,585 Google Play ratings against OVO's 3.0 from 11,178. The gap is larger on Android, where Octopus has a net-positive score of 69.2% and OVO has 2.8%, meaning OVO's positive and negative Play ratings are close to evenly split.
OVO says its app lets you check your balance, send meter readings, track your energy use, get home energy insights and find your bills. You can also join its Power Move scheme through the app, which gives points for using electricity at greener times. One iPhone user praised the level of detail, including being able to change the Direct Debit amount and date. Another found that once the app was installed they could no longer log into the OVO website on their phone, even though the app sends you to the website to see all tariffs.
For Octopus, one iPhone user reported repeated gaps in the app's usage data and a reading far higher than their gas boiler could use, which they had raised with Octopus over several months.
Service and support
Average response: 1.2 min (April to June 2026)
Hours: Monday 9am-5pm, Tuesday 9am-5pm, Wednesday 9am-5pm, Thursday 9am-5pm, Friday 9am-4pm
Average response: 47 sec (April to June 2026)
Replies: 86.4% within 2 days (April to June 2026)
Hours: 7 days/week
Replies: 98.7% within 2 days (April to June 2026)
Average response: 1.1 min (April to June 2026)
Hours: Available
Citizens Advice scores the two almost the same: 3.67 out of 5 for Octopus and 3.65 for OVO, ranked 5th and 6th. Because that is a near tie, the more useful differences lie in how quickly each supplier responds. In April to June 2026, OVO answered calls faster on average, in 47 seconds against 1 minute 9 seconds for Octopus, and it replied to 98.7% of emails within two days, against 86.4% for Octopus. Customers in the Which? survey still rated Octopus easier to contact, so measured speed and customer views point in different directions.
For webchat, OVO's average response time was 1 minute 7 seconds over the same period. Octopus's phone lines for routine enquiries are open Monday to Thursday 9am to 5pm and Friday 9am to 4pm, and it says its email team is available seven days a week.
Meter and billing measures are closer. In April to June 2026, 95.08% of OVO's smart meters were working, against 91% for Octopus. For smart meters, 98.44% of OVO bills and 96.33% of Octopus bills were based on actual readings, while for traditional meters Octopus was ahead at 93.99% against 90.24%. Bills based on actual readings reduce the chance of a large catch-up bill later.
| Billing and metering | Octopus Energy — April to June 2026 | OVO Energy — April to June 2026 |
|---|---|---|
| Smart meters working correctly | 91% | 95.08% |
| Bills based on readings — smart meters | 96.33% | 98.44% |
| Bills based on readings — traditional meters | 93.99% | 90.24% |
Complaints and performance
Both suppliers' own complaint figures are for Q2 2026, so they can be compared directly. These figures count complaint events per 100,000 customer accounts. They do not show how many people or households complained, because one customer can make more than one complaint and one household can hold more than one account. In Q2 2026 Octopus Energy received 476 complaints per 100,000 customer accounts. OVO Energy received 1,775, which is nearly four times as many on the same measure.
How quickly complaints were sorted out tells a different story. In Q2 2026 OVO Energy resolved 63.5% of complaints by the same or next working day and 90.7% within eight weeks. Octopus Energy resolved 43% by the same or next working day and 80% within eight weeks. These figures show speed only, not whether customers were happy with the result. In short, Octopus Energy received fewer complaints for its size, while OVO Energy closed a larger share of the complaints it received more quickly.
Citizens Advice figures measure something else. They count complaints that customers took to advice bodies and the Energy Ombudsman, not complaints made directly to the supplier, and they are counted per 10,000 customers. For April to June 2026, Octopus Energy had 21.4 such complaints per 10,000 customers and OVO Energy had 37.5. Both figures cover the same period, so they can be compared with each other. They should not be compared with the supplier-reported rates above, because the scope and the counting base are different.
Each supplier lists its top five complaint themes in ranked order. Neither gives a time period for these themes, so they should not be assumed to cover Q2 2026. Neither gives the share of complaints for each theme, so it is not possible to say how big each problem is or to compare the size of the same problem between the two suppliers. Octopus Energy describes what it has done and plans to do for each theme, but does not describe the problems themselves. OVO Energy describes each type of problem but does not list any actions in response.
Top complaint themes
Green energy: Octopus Energy and OVO Energy
The charts show each supplier's latest published annual fuel mix: the sources of the electricity it supplied to customers over a year. Octopus's figures cover April 2024 to March 2025. OVO's cover April 2025 to March 2026. Because they describe different years, the charts are not a like-for-like ranking.
Octopus Energy
From 1 April 2024 to 31 March 2025, the electricity Octopus supplied was 86.4% renewable and 13.6% nuclear, with no gas or coal. That makes its supply zero-carbon at the point of generation, but not wholly renewable. Nuclear power is low-carbon, but it is not a renewable source. Octopus says it mainly buys power from renewable sources such as wind, solar and hydro.
Much of this comes through power purchase agreements (PPAs), which are contracts to buy electricity straight from generators. Octopus says it buys renewable electricity directly from more than 700 UK generators this way. Some are independent, and some are within the portfolio of UK renewable producers it operates. It also says it buys from about a third of the community energy sector through over 250 PPAs. In these projects, local people own and run the generation and reinvest the profit in local causes.
Some named tariffs carry their own promise. On Agile Octopus and Octopus Flux, '100% green' means Octopus matches every MWh used on that tariff with a Renewable Energy Guarantee of Origin (REGO). A REGO is a certificate showing that a unit of renewable power was generated in Britain. Matching works on totals, so it does not mean the power reaching your home is renewable at every moment.
Octopus has also begun owning wind turbines, which it calls 'Fans'. It owns two in Yorkshire and South Wales and has adopted two more in Lincolnshire and Yorkshire from wind farms it operates. Through the Octopus Fan Club, people living closest to these turbines get power up to 50% cheaper when the turbines are working hardest. Separately, Octopus Energy Generation is part of Octopus Energy Group and backs, builds and manages renewable projects. In May 2026 it reported £8.5bn of assets under management and 5.7 GW of capacity across its portfolio. These are managed assets and do not show where any one household's power comes from.
OVO Energy
From 1 April 2025 to 31 March 2026, the electricity OVO supplied was 64% natural gas, 12% coal, 12% renewable, 7% nuclear and 5% other sources. Only 19% came from zero-carbon sources. OVO reports a carbon intensity of 393g per kWh for the same period.
The low renewable share partly reflects a choice OVO made. It stopped using REGO certificates as standard in 2023. OVO argues that REGOs only reassign renewable power that is already being generated, rather than adding new green power to the grid. Instead, it says it buys electricity for its Greener Electricity customers directly from renewable generators and invests in new, independent renewable power.
For households who want renewable backing, OVO offers Greener Electricity. OVO describes it as 100% renewable electricity backed by PPAs with UK-based generators. Your home still draws its power from the National Grid's mix. However, for every unit you use, OVO adds the same amount of renewable electricity to the grid from a UK generator. This promise applies to Greener Electricity customers, not to OVO's supply as a whole.
OVO's smart products also encourage households to use power at cleaner times. Power Move gives app users points for using electricity at greener times. The Charge Anytime EV add-on schedules charging for the cheapest wholesale times and for when the carbon intensity of the electricity is lowest. OVO also says it has planted 5 million trees in UK schools and communities on behalf of customers since 2015. Tree planting does not change the electricity mix.
Our verdict
| If you care most about | Choose |
|---|---|
| Lower prices on the tariffs priced here | Octopus Energy |
| Higher app ratings on iPhone and Android | Octopus Energy |
Octopus Energy is our pick on customer ratings, Which? scores and app ratings, while OVO Energy answered calls faster and replied to more emails within two days.
Octopus comes out ahead because the customer evidence leans its way. It has the higher Trustpilot rating with far fewer one-star reviews, a Which? total score of 74 against 61, and customers in the Which? survey rated its overall service 4 out of 5 against 2 for OVO. It also had fewer complaints taken to Citizens Advice and the Energy Ombudsman in April to June 2026, at 21.4 per 10,000 customers against 37.5 for OVO. Its apps are also rated higher on both iPhone and Android.
OVO may suit you better if quick replies matter most. In April to June 2026, it answered calls faster, replied to a higher share of emails within two days and had a higher share of working smart meters. It also offers webchat, and its reviewers often praise its engineers. Price is a smaller factor between these two: Flexible Octopus is only £8 a year cheaper than Simpler Energy, although Octopus's fixed deals are priced lower. If you care where your electricity comes from, Octopus reported 86.4% renewable power for April 2024 to March 2025, while OVO reported 12% renewable and 76% gas and coal for April 2025 to March 2026.
- Trustpilot rating of 4.8, with 90% of reviews five-star and 3% one-star
- Which? total score of 74%, and 4 out of 5 from customers for overall service
- Flexible Octopus estimate of £1,664 a year with no exit fee, £8 less than Simpler Energy
- Higher app ratings: 4.8 on the App Store and 4.3 on Google Play
- Electricity mix of 86.4% renewable and 13.6% nuclear (April 2024 to March 2025)
- Slower average call answer: 1 minute 9 seconds against 47 seconds
- 86.4% of emails answered within two days, against 98.7% for OVO
- Cheapest fixed deal ties you in for 18 months with a £150 exit fee; the 12-month deal costs £1,899 with a £100 fee
- Reviewers mention appointment booking problems and repeated estimated bills
- Faster average call answer of 47 seconds and 98.7% of emails answered within two days
- Webchat with an average response time of 1 minute 7 seconds
- 95.08% of smart meters working, against 91% for Octopus
- Replies to 99% of negative Trustpilot reviews, typically within 24 hours
- Reviewers praise friendly advisers and engineers who arrive on time
- Which? total score of 61%, and 2 out of 5 from customers for overall service and ease of contacting
- Google Play rating of 3.0, with positive and negative ratings close to evenly split
- Cheapest fixed deal shown is £2,027 a year and comes bundled with Complete Cover
- 9% of Trustpilot reviews are one-star, against 3% for Octopus
- Reviewers mention long phone waits and trouble reaching a person
Frequently asked questions
Do the cheapest tariffs have exit fees?
No. Flexible Octopus (£1,664 a year) and OVO's Simpler Energy (£1,672 a year) are both variable tariffs with no fixed term and a £0 exit fee. The fixed deals priced here do charge exit fees: £150 on Octopus 18M Fixed October 2026 v7, and £100 on Octopus 12M Fixed October 2026 v8 and on both OVO 1 Year Fixed deals.
How long do the fixed deals last?
Octopus's cheapest fixed deal runs for 18 months at £1,848 a year, and its 12-month deal costs £1,899 a year. Both OVO fixed deals priced here run for 12 months, starting at £2,027 a year for the version bundled with Complete Cover home cover. The plain OVO 1 Year Fixed 29 October 2026 costs £2,031 a year.
Which supplier answers the phone faster?
OVO did in April to June 2026, with an average call centre wait of 47 seconds against 1 minute 9 seconds for Octopus. OVO also answered 98.7% of emails within two days, against 86.4% for Octopus. Customers in the Which? survey still rated Octopus easier to contact, with 4 out of 5 against 2 out of 5.
When can I phone Octopus?
For routine enquiries, Octopus's phone lines are open Monday to Thursday 9am to 5pm and Friday 9am to 4pm. Octopus says its email team is available seven days a week.
What can I do in the OVO app?
OVO says its app lets you check your balance, send meter readings, track your energy use, get home energy insights and find your bills. You can also join its Power Move scheme, which gives points for using electricity at greener times. The app is rated 4.6 on the App Store and 3.0 on Google Play.
How often are bills based on actual meter readings?
In April to June 2026, 98.44% of OVO's smart meter bills and 96.33% of Octopus's were based on actual readings. For traditional meters the order flips, with 93.99% for Octopus against 90.24% for OVO. OVO also had more of its smart meters working, at 95.08% against 91%.
How do the two compare on help for customers who need extra support?
Both scored highly in the Which? supplier assessment of help for those who need it: 10 out of 10 for Octopus and 9 out of 10 for OVO. This assesses each supplier's support arrangements rather than guaranteeing the help any one household will receive.
Where does each supplier's electricity come from?
For April 2024 to March 2025, Octopus reported 86.4% renewable and 13.6% nuclear electricity, with no gas or coal. For April 2025 to March 2026, OVO reported 64% natural gas, 12% coal, 12% renewable, 7% nuclear and 5% other sources. OVO says it stopped using renewable certificates (REGOs) as standard in 2023, which partly explains its lower renewable share. The two cover different years, so they are not a like-for-like ranking.
Watch the video
What changed this month
This month, OVO Energy's play store net-positive % rose from -4.1 to 2.8, Octopus Energy's iOS sampled positive reviews rose from 0 to 1, and OVO Energy's iOS sampled positive reviews rose from 0 to 2. There were 17 other data changes this month — see the full changelog below for details.
Data changes this month (28)
Octopus Energy
- Trustpilot reviews880,701 → 911,202
- iOS app ratings count263,000 → 268,000
- iOS app days since last update25 → 7
- iOS sampled reviews avg starsnow available (2.33)
- iOS sampled positive reviews0 → 1
- iOS sampled negative reviews0 → 2
- Play Store rating4.328419 → 4.3003545
- Play Store ratings count47,449 → 47,585
- Play Store days since last update17 → 7
- Play Store positive ratings %83.2 → 82.4
- Play Store negative ratings %12.6 → 13.2
- Play Store neutral ratings %4.2 → 4.4
- Play Store net-positive %70.6 → 69.2
- Cheapest fixed tariff£1,831.1 → £1,848.31
OVO Energy
- Trustpilot reviews304,542 → 309,371
- iOS app days since last update29 → 17
- iOS app updates in last 90 days2 → 3
- iOS sampled reviews avg starsnow available (3.67)
- iOS sampled positive reviews0 → 2
- iOS sampled negative reviews0 → 1
- Play Store rating2.9077778 → 3.045154
- Play Store ratings count11,054 → 11,178
- Play Store days since last update29 → 18
- Play Store positive ratings %46 → 49.6
- Play Store negative ratings %50.1 → 46.8
- Play Store neutral ratings %3.9 → 3.6
- Play Store net-positive %-4.1 → 2.8
- Cheapest fixed tariff£1,968.62 → £2,027.01
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Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.