How to read this list
Rank
Position in the Top 15, sorted by audience size from largest to smallest. Updated weekly.
Audience size
Estimated number of unique people in United Kingdom who actively engage with this audience, derived from anonymized search-behavior signals.
Country share
Share of the global audience that is active in United Kingdom. A higher value means the audience is more locally concentrated here.
Avg age
Average age in years across the people who engage with this audience in United Kingdom, derived from anonymized search-behavior signals. A dash means demographic data is not yet available.
Female share
Share of women among the people who engage with this audience in United Kingdom. 50% is gender-balanced; values above mean female-skewed, below mean male-skewed.
Ranking
| Rank | Audience | Audience size | Country share | Avg age | Female share | Subtype |
|---|---|---|---|---|---|---|
| 1 |  SEMrush |
247k | 2.8% | 38.5 | 51.1% | Online / mobile marketing |
| 2 |  Optimizely |
92k | 2.7% | 43.8 | 61.7% | Online / mobile marketing |
| 3 |  Search Engine Journal |
61k | 9.2% | 35.3 | 46.0% | Online / mobile marketing |
| 4 |  Search Engine Land |
60k | 9.4% | 35.4 | 46.2% | Online / mobile marketing |
| 5 |  Outbrain |
57k | 7.5% | 43.1 | 64.1% | Online / mobile marketing |
| 6 |  Criteo |
24k | 3.0% | 35.4 | 49.1% | Online / mobile marketing |
| 7 |  Unbounce |
18k | 5.3% | 32.4 | 52.5% | Online / mobile marketing |
| 8 |  GetResponse |
18k | 1.8% | 37.4 | 66.8% | Online / mobile marketing |
| 9 |  App Annie |
18k | 4.3% | 37.2 | 52.3% | Online / mobile marketing |
| 10 | InMobi |
15k | 4.2% | 37.5 | 53.9% | Online / mobile marketing |
| 11 |  Instapage |
9k | 5.1% | 31.2 | 62.3% | Online / mobile marketing |
| 12 |  tapjoy |
4.3k | 3.3% | 33.0 | 81.4% | Online / mobile marketing |
| 13 |  Marin Software |
2.5k | 6.3% | 40.0 | 54.7% | Online / mobile marketing |
| 14 |  Moz (marketing software) |
1.6k | 2.9% | 38.6 | 50.2% | Online / mobile marketing |
| 15 |  Kenshoo |
1.2k | 2.8% | 32.7 | 34.7% | Online / mobile marketing |
Want the full picture for any of these audiences?
Open any profile to see psychographics, top regions, peer affinities and demographic splits — all derived from the same anonymized signals.
Frequently asked questions
How is this Top 15 list compiled?
Rascasse aggregates anonymized search-behavior signals across United Kingdom and ranks each online / mobile marketing by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest online / mobile marketing in United Kingdom?
SEMrush currently leads with an estimated audience of 247k people in United Kingdom.