The biggest green supplier

We're proud to be the UK's biggest green supplier. We provide our members with 100% renewable electricity from solar, wind and hydro. Plus, our gas is 100% carbon neutral. 10% is green gas produced from renewable sources like food or farm waste. And we offset the rest of the gas we supply by supporting carbon reduction projects around the world.

Unicorns from Bulb's TV advert
A photo of Miles and Gale, the owners of Old Walls Farm, one of our renewable electricity generator.

Independent generators

We buy our energy from independent renewable generators from across the UK, like Gail and Miles from Old Walls Hydro in Dartmoor. Wherever possible, we have direct relationships with these generators to purchase their electricity. We buy the rest from the wholesale market. We source our energy from solar, wind and hydro. They're a pretty impressive bunch, our generators.

The best kind of energy

Which do you choose: energy that harms the planet or energy that doesn't? Exactly. 100% of Bulb's electricity is renewable. And our gas is 100% carbon neutral. Win win.

By going green, the average Bulb member lowers their carbon impact by 3.5 tonnes of CO2 a year. That’s the hard work of around 1,770 trees.

Source: Data provided by Electricity Info, an independent energy information site

A Bulb energy specialist turns, smiling to the camera, in our naturally lit and bustling office.

Trusting your energy supplier

For us, giving great service is first, last and everything. We're chuffed to be rated 4.7 out of 5 with over 10,000 reviews on Trustpilot.

trustpilot logo, rated 4.7 out of 5

One low tariff for all. Phew

Too many energy companies confuse customers with lots of complicated tariffs. We like to keep things simple.

With Bulb's single tariff, you know you're getting the best possible price for your energy. In fact, we're one of the cheapest suppliers on the market, renewable or not.

Source: Data provided by Energy Helpline, an independent energy switching site
Based on typical annual consumption of 3,100 kwh electricity and 12,000 kwh gas in the Eastern region

Only 2 minutes to switch and we'll take care of the rest


Leave it to us

We'll let your supplier know you're leaving. All you need to do is send us a meter reading.

A light bulb

You'll always have power

Your energy supply will never be cut off while you're switching to us.

A chainlink being broken

We'll pay your exit fees

If your old supplier charges you for leaving, we'll refund you.

Keep on top of your energy

Understanding your energy usage helps you to lower your bills, so we make it easy for you.

Keep on top of your energy with your Bulb Account. Sign in online, or download the app. You can track your usage, submit meter readings and check your balance.

And as part of our Community you can chat with other members and share ideas about Bulb. Including how we can improve - we know we're not perfect.

Doing the right thing

As a certified B-Corp, we meet the highest social and environmental standards. For every new member that switches to Bulb, we donate £1 towards Edible Playgrounds by Trees for Cities, a charity building vibrant, outdoor spaces in inner-city schools.

Photo shows children playing in the edible playgrounds that are made possible by Bulb's donations to Trees for Cities.

Only 2 minutes to switch and we'll take care of the rest

As featured in

The Times

"Bulb bucked the trend"


"Challenger green energy firm"

Fast Track

Named one of ten "Disruptors to Watch"

The Guardian

"One tariff that's fair for all"