Bigger finally means better again.
Octopus Energy is now Britain’s biggest energy supplier, trusted by over 8 million customers
As of 31st October 2025 there were 20 fully licensed suppliers in the market consisting of six large suppliers, 2 medium suppliers and 12 small suppliers. More people choose Octopus Energy to supply their energy over any other supplier.
UK energy suppliers and their total number of energy accounts 👆
Not to toot our own horn (of course, we're not perfect) but the results speak for themselves.
We're the UK's most awarded energy supplier
With nine consecutive wins as Which? Recommended Provider of the Year and a 4.8 star Trustpilot rating we were named Britain's most admired company in 2025.
We put clever technology behind the scenes, so our people can focus on the most important thing: you.
Citizens Advice measured complaints from all major energy suppliers and found Octopus Energy to have the lowest number of customer complaints of any of the Big 6 Energy Suppliers.
And if you need support our average phone wait time is 1 minute.
Every Octopus customer gets a dedicated support team.
We know how frustrating it is to be passed from person to person when you just need help.
Instead of the usual maze of "please hold while I transfer you to someone who might actually know something about this" we've created something pretty special.
When you switch to Octopus, you're given to a team of energy specialists (usually between 10-15 of them). Each team is entirely responsible for a smaller group of customers, like a mini-business within Octopus, with its own 'CEO'. Each with the training and tools to handle just about anything you need.
This means when you call, you're not just another voice in the void, you're speaking to your team.
Often the same lovely person who helped you last time.
Switch online in less than 5 minutes
Backed by the Energy Switch Guarantee, you can be confident that things will run smoothly and that you're making the right move.
We really will look after you
Our customers are at the heart of everything we do. If you're struggling, we're here to help.
Through our £40 million Octo Assist fund, we’ve been able to provide genuine, practical support. We’ve sent out thousands of free electric blankets to keep customers cosy, reducing their need to put on the heating, and are waiving the standing charge for up to 100,000 customers in the greatest need over winter.
But don't take it from us. Here's what customers we've already helped had to say.
We've been a Which? recommended supplier for nine years in a row
We're one of Europe's leading investors in renewable generation
Our standard tariffs have always been priced below the Ofgem Energy Price Cap
The switching was so easy, a few little clicks on the iPad, and done. I just wish I'd done it sooner, that's the only thing
Sue
Ad claims explained
Most homes could save with Octopus
We're on a mission to make green energy cheap.
Most homes in Britain are paying for energy at the price cap rate. We're the only large supplier to price its standard tariff meaningfully below the Ofgem energy price cap, a decision that has saved our customers tens of millions of pounds in the last 12 months.
If you're paying standard variable rates with any large supplier for your gas, your electricity, or both – you'll save money if you switch to Octopus. See our calculations here.
Switching usually takes less than 5 minutes
To initiate your switch to Octopus, get a quote here, select your tariff and provide us with your contact and payment details. That's it! We'll handle the rest and inform your old supplier. We'll keep you informed throughout the process, and you'll receive an email once you're on supply, typically within 2 working days.
Previously, the processes we handled in the background to switch your supplier could have taken up to 3 weeks. But as of the 18th July 2022, Ofgem's Faster More Reliable Switching Project (FMRS) turbocharged switching to just 2 working days for a typical customer. Read more about FMRS here.
The UK's most awarded energy supplier
We've won more awards than any other energy supplier.
Britain's number 1 choice for energy - the UK's most popular energy supplier.
From the 1st of October 2024, Octopus Energy is the company with the most household energy (defined as the sum of electricity and gas) accounts in Great Britain.
Smart meter customers can claim Octoplus rewards worth over £200
Our free rewards programme Octoplus is available to all Octopus smart meter customers paying by Direct Debit.
Rewards with Octoplus can change throughout the year. For example, you can earn Octopoints for saving energy with Saving Sessions in the colder months and access Free Electricity when the grid is super green.
Last year, Octoplus customers had access to over £300 worth of rewards across the year, which, based on a typical bill, would be equivalent to 17% of annual energy costs.
As seen in
Rated 5 stars for customer service from 759,653 reviews.
Hey I'm Constantine, welcome to Octopus Energy!
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