--- title: "giffgaff vs O2: Which is searched more in the United Kingdom?" description: "Is giffgaff or O2 more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Mobile networks set in the United Kingdom. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/uk/compare/giffgaff-vs-o2-uk" publisher: "Brandwave" --- # giffgaff vs O2: Which is searched more in the United Kingdom? Is giffgaff or O2 more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Mobile networks set in the United Kingdom. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: giffgaff and O2 - **Competitive set**: Mobile networks - **Market**: United Kingdom - **Month measured**: Sep 2026 - **giffgaff Share of Search**: 11.9% - **O2 Share of Search**: 10.2% ## Is giffgaff or O2 more popular in search? - In September 2026, giffgaff had more branded searches than O2 among mobile networks in the United Kingdom. giffgaff had about 550,000 branded searches, while O2 had 468,000. giffgaff made up 11.9% of all mobile network searches we track, and O2 accounted for 10.2%. - The lead changed hands 3 times in the 12 months ending September 2026: giffgaff took it in December 2025, O2 took it in March 2026, giffgaff took it in April 2026. - Across the 12 months ending September 2026, giffgaff’s share of searches among mobile networks in the United Kingdom moved from 10% to 11.9%, and its estimated monthly branded searches held steady at 550K. - Across the 12 months ending September 2026, O2’s share of searches among mobile networks in the United Kingdom moved from 10.4% to 10.2%, and its estimated monthly branded searches moved from 577K to 468K. ## Top mobile networks in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, giffgaff and O2 were each mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. O2 was listed before giffgaff in every answer that named either. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Vodafone | 1st | 3 of 3 | 2 of 2 | 5 of 5 | | EE | 2nd | 2 of 3 | 2 of 2 | 4 of 5 | | Three | 3rd | 3 of 3 | 1 of 2 | 4 of 5 | | O2 | 4th | 2 of 3 | 1 of 2 | 3 of 5 | | SMARTY | 5th | 2 of 3 | 1 of 2 | 3 of 5 | | Lebara | 6th | 1 of 3 | 2 of 2 | 3 of 5 | | iD Mobile | 7th | 2 of 3 | 1 of 2 | 3 of 5 | | giffgaff | 8th | 2 of 3 | 1 of 2 | 3 of 5 | | Lyca Mobile | 9th | 1 of 3 | 0 of 2 | 1 of 5 | | VOXI | 10th | 2 of 3 | 0 of 2 | 2 of 5 | | Tesco Mobile | 11th | 2 of 3 | 1 of 2 | 3 of 5 | | Sky | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about mobile networks - Asked ChatGPT "Which mobile network should I use in the UK?": 1. EE, 2. Vodafone, 3. O2, 4. Three, 5. VOXI, 6. Tesco Mobile, 7. giffgaff - Asked ChatGPT "What are the best mobile networks and SIM-only providers in the UK?": 1. EE, 2. Vodafone, 3. O2, 4. Three, 5. giffgaff, 6. SMARTY, 7. Lebara, 8. VOXI, 9. iD Mobile, 10. Tesco Mobile - Asked ChatGPT "What's the best SIM-only deal in the UK for lots of data?": 1. Lyca Mobile, 2. iD Mobile, 3. SMARTY, 4. Three, 5. Vodafone - Searched Google, AI Overview "sim only deals": 1. Lebara, 2. Vodafone, 3. EE - Searched Google, AI Overview "best mobile network": 1. EE, 2. Three, 3. Vodafone, 4. O2, 5. SMARTY, 6. iD Mobile, 7. giffgaff, 8. Tesco Mobile, 9. Lebara Not named in any answer: Sky. Brands are listed in the order each answer named them. The answers were collected in United Kingdom on October 22, 2026. ## How did search popularity change for United Kingdom mobile networks in September 2026? - In September 2026, O2 gained share of searches among mobile networks in the United Kingdom, from 9% to 10.2%. - In September 2026, giffgaff lost share of searches among mobile networks in the United Kingdom, from 13% to 11.9%. ## Month by month | Month | giffgaff estimated searches | giffgaff Share of Search | giffgaff rank | O2 estimated searches | O2 Share of Search | O2 rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 550K | 10% | 5 | 577K | 10.4% | 4 | | Nov 2025 | 673K | 12.5% | 4 | 695K | 12.9% | 3 | | Dec 2025 | 550K | 12.8% | 3 | 465K | 10.8% | 5 | | Jan 2026 | 550K | 12.3% | 2 | 465K | 10.4% | 5 | | Feb 2026 | 550K | 14% | 2 | 383K | 9.8% | 5 | | Mar 2026 | 450K | 10.9% | 5 | 465K | 11.3% | 4 | | Apr 2026 | 450K | 11.4% | 4 | 383K | 9.7% | 5 | | May 2026 | 550K | 14.1% | 2 | 380K | 9.8% | 5 | | Jun 2026 | 550K | 14.4% | 2 | 380K | 9.9% | 5 | | Jul 2026 | 550K | 14.5% | 2 | 383K | 10.1% | 5 | | Aug 2026 | 550K | 13% | 2 | 383K | 9% | 5 | | Sep 2026 | 550K | 11.9% | 2 | 468K | 10.2% | 5 | ## How each brand is measured Brandwave collects information about searches that people make online using giffgaff’s and O2’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading. - **giffgaff**: Measured on the search term “giffgaff”. - **O2**: Measured on the search terms “o2” and “o2 uk”, summed into one figure. - [giffgaff profile](/demand/uk/brands/giffgaff) - [O2 profile](/demand/uk/brands/o2-uk) - [All mobile networks in the United Kingdom](/demand/uk/categories/uk-mobile-networks): The set both shares are measured inside, 12 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is giffgaff or O2 more popular in search? In September 2026, giffgaff had more branded searches than O2 among mobile networks in the United Kingdom. giffgaff had about 550,000 branded searches, while O2 had 468,000. giffgaff made up 11.9% of all mobile network searches we track, and O2 accounted for 10.2%. ## Cite this page Brandwave. "giffgaff vs O2: Which is searched more in the United Kingdom?". https://gobrandwave.com/demand/uk/compare/giffgaff-vs-o2-uk This page is also available as HTML at https://gobrandwave.com/demand/uk/compare/giffgaff-vs-o2-uk. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.