Ranked · 8 assessed
Ordered by Agency List ScoreCommunity gymnastics club fostering potential in Buckinghamshire.
Integrated PR and communications for travel and consumer brands
AI-native digital products for ambitious businesses
Global provider of virtual assistance and IT services
Delivers seamless retail execution and sustainability insights
Offshore IT staffing and talent sourcing for global companies
Executive search for media, technology, and information services
Transforms brands and culture for sustainable growth
Also in London · 2 not yet assessed
Listed agencies queued for assessment. Alphabetical.About this ranking
What this page ranks
This page ranks the 8 Customer Support BPO agencies in London, Greater London that have been assessed on the Agency List Score, out of 10 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, Customer Support BPO in London, Greater London. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 8, so the strongest award available here is top 25%.
The 2 Customer Support BPO agencies not yet assessed are listed on this page but not ranked.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Categories in London
Customer Support BPO nearby
Questions
- How many Customer Support BPO agencies are in London, Greater London?
- 10 are listed on Agency List in London, Greater London. 8 of them have been assessed on the Agency List Score as of October 2026.
- Which Customer Support BPO agency in London, Greater London is ranked highest?
- 2 agencies share the top Agency List Score of 97 among the 8 assessed agencies in Customer Support BPO in London, Greater London, so no single agency is named the highest.
- Why are 2 Customer Support BPO agencies listed here but not ranked?
- 2 of the 10 listed have not yet been assessed on the Agency List Score. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the Customer Support BPO in London, Greater London cohort of 8 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.