What are the Top Audio Annotation Companies in the United Kingdom 2026-2027?
Teams transcribing and labelling speech, sounds and speakers. Compare verified providers in the United Kingdom, see typical 2026-2027 pricing and use our checklist to pick the right partner.
Companies based in the United Kingdom only: established outsourcing and customer experience firms based in the United Kingdom selected by the iCreativez research team. Shortlist drawn from verified Data Annotation providers. International providers are shown separately below and are not counted as local.
Companies based in the United Kingdom
- 1
Capita
London, United Kingdom
Why listed: established firm with an office in the United Kingdom, selected by the iCreativez research team for its scale and track record.
- 2
Serco
Hook, Hampshire, United Kingdom
Why listed: established firm with an office in the United Kingdom, selected by the iCreativez research team for its scale and track record.
International firms to consider for the United Kingdom
Headquartered outside the United Kingdom or working remotely, so not counted in the local list above. Some work with clients in the United Kingdom through regional offices, partners or remote teams; check coverage before you shortlist.
- 3
Appen
Headquarters: Sydney, Australia
Why listed: Established Data Annotation firm operating internationally.
- 4
Scale AI
Headquarters: San Francisco, USA
Why listed: Established Data Annotation firm operating internationally.
- 5
TELUS Digital
Headquarters: Vancouver, Canada
Why listed: Established Data Annotation firm operating internationally.
- 6
iMerit
Headquarters: San Jose, USA
Why listed: Established Data Annotation firm operating internationally.
- 7
Sama
Headquarters: San Francisco, USA
Why listed: Established Data Annotation firm operating internationally.
About Audio Annotation providers
Teams transcribing and labelling speech, sounds and speakers.
Data annotation companies label images, text, audio and video to train AI models. Label quality and consistency directly affect model performance.
In the United Kingdom, Audio Annotation Companies are concentrated around London, Manchester, Birmingham, Edinburgh and Bristol. Local rates sit at the upper end of the global ranges, so many buyers in the United Kingdom pair a local lead with nearshore or offshore delivery to manage cost. For regulated services, always confirm the provider is licensed to operate in the United Kingdom.
How to choose the best Audio Annotation Companies in 2026-2027
- Ask about language and accent coverage.
- Ask about quality assurance and inter-annotator agreement.
- Check security for sensitive data.
- Run a paid pilot batch first.
What does it cost?
Annotation is usually priced per item or per hour, from a few cents per simple label to several dollars for complex segmentation.
Before you sign
Ask for a written proposal with scope, milestones, team members and exit terms, and speak to at least one current client of each shortlisted provider.
Related Data Annotation lists
Popular lists
Audio Annotation Companies by country
Frequently asked questions
What are the top Audio Annotation Companies in 2026-2027?
Our 2026-2027 shortlist of Audio Annotation Companies includes verified providers such as Task Virtual, Growth Hub, SixEleven Global Services and Solutions, Inc., Appen, Scale AI. Use the country selector to see only firms based in your country.
What do Audio Annotation Companies do?
Teams transcribing and labelling speech, sounds and speakers. Data annotation companies label images, text, audio and video to train AI models.
How much do Audio Annotation services cost in 2026-2027?
Annotation is usually priced per item or per hour, from a few cents per simple label to several dollars for complex segmentation. Prices vary by scope, seniority and location, so ask at least three providers for written proposals.
How do I choose the right Audio Annotation Company?
Ask about language and accent coverage. Ask about quality assurance and inter-annotator agreement. Check security for sensitive data.
How were these Audio Annotation Companies selected?
The worldwide view lists Clutch-verified specialists (registered businesses independently verified on Clutch with working websites, ordered by verified client reviews as of November 2026) and established industry leaders. When you choose a country, the main list shows only companies based in that country or with an office there: Clutch-verified firms with a local office, plus established local firms selected by the iCreativez research team. International firms are shown in a separate, labelled section. Inclusion is free and not paid for. Because Audio Annotation is a specialist niche, the shortlist is drawn from verified Data Annotation providers.
How this list is compiled
Worldwide view: Clutch-verified specialists (registered businesses independently verified on Clutch with a working website, ordered by their number of verified client reviews) followed by established industry leaders. Country view: the main list is strictly local. It shows only Clutch-verified firms with an office in the selected country and established firms based in that country that the iCreativez research team selected for their scale and track record. Large international firms and remote teams that serve the country appear in a separate, labelled section and are never counted as local. Where we have not yet verified enough local firms, the page says so instead of padding the list. Minimum project size, hourly rates and team size are as published by each company in November 2026. Inclusion is free and not paid for. Shortlist drawn from verified Data Annotation providers. Providers can request a review via our contact page.