Octopus Energy

1. Oct 2026

First measured October 2026.

1. Toast Electric, 0.78 MB
2. Electric Kiwi, 1.55 MB
3. Powershop, 1.57 MB
4. Meridian, 1.63 MB
5. Contact, 1.68 MB
6. Octopus Energy, 1.74 MB
7. Lodestone, 1.78 MB
8. Ecotricity, 2.01 MB
9. Grey Power Electricity, 2.32 MB
10. Genesis, 2.96 MB
11. Pulse, 3.75 MB
12. Nova, 3.93 MB
13. Mercury, 7.18 MB

1. B
2. D
3. D
4. D
5. D
6. D
7. D
8. E
9. E
10. F
11. F
12. F
13. G

LightestHeaviest

• Octopus Energy

• Phone

  10.1 MB

• Laptop

  10.2 MB

First visitiReturningi

1. Homepage

   /

   First visit

   Phone 10.1 MB

   Laptop 10.2 MB

   Returning

   Phone 7.9 MB

   Laptop 7.9 MB

2. Plans

   /plans

   First visit

   Phone 2.4 MB

   Laptop 2.4 MB

   Returning

   Phone 0.09 MB

   Laptop 0.09 MB

3. Power outages

   /help/outages

   First visit

   Phone 2.2 MB

   Laptop 2.2 MB

   Returning

   Phone 0.06 MB

   Laptop 0.05 MB

4. Contact

   /contact-us

   First visit

   Phone 2.2 MB

   Laptop 2.2 MB

   Returning

   Phone 0.10 MB

   Laptop 0.10 MB

• Octopus Energy’s own files

  This website

  8.5 MB84%

• Google Tag Manager

  Tag manager

  0.55 MB5%

• JSDelivr CDN

  Hosting and delivery

  0.54 MB5%

• Facebook

  Advertising and social

  0.30 MB3%

• 3 more companies

  Clarity, Utility, 0.03 MB
  Bing Ads, Advertising and social, 0.02 MB
  Hotjar, Analytics, 0.01 MB

  0.05 MB1%

• Unknown source

  0.22 MB2%

• Images

  7.4 MB

• Scripts

  1.9 MB

• Other

  0.67 MB

• Fonts

  0.14 MB

• Styles

  0.06 MB

1. Image · Octopus Energy

   what-made-you-go-solar-update-2x.png

   Homepage

   1.2 MB

2. Image · Octopus Energy

   people-have-the-power-hamish-hills-blog-header-2x.png

   Homepage

   0.95 MB

3. Image · Octopus Energy

   wired-tech-summit-blog-post-02.png

   Homepage

   0.89 MB

4. Image · Octopus Energy

   project-mercury-blog-header.png

   Homepage

   0.62 MB

5. File · JSDelivr CDN

   dotlottie-player.wasm

   Homepage

   0.54 MB

Fix

Nothing a visitor would notice

Choice

Removes or delays something

Worked out on a phone and a laptop. The icons show where each saving applies.

1. Fix

   Ship less of your own code: scripts and styles that did not run while the homepage loaded

   Every page · Octopus Energy

   up to 0.25 MB

2. Choice

   Check every marketing tag still earns its place: 4 companies

   Every page · several companies

   up to 0.25 MB

If this website had 100,000 page views a year, they would cause about 16 kg of carbon emissions.

Built to grade A (under 0.53 MB a page), the same page views would cause about 4.8 kg.

A grade C badge needs a typical page under 1.41 MB. Octopus Energy’s is 1.74 MB.