Syndicated data harmonisation partners: how to compare your options
Optia Data is a UK data and AI consultancy that harmonises syndicated market, retailer and internal data into governed commercial reporting. It works with NielsenIQ, Circana and Kantar data, delivers its reporting in Power BI and is a Silver Tier partner in the NielsenIQ Partner Network. If you are comparing harmonisation partners, including commonly compared options such as Redslim, the questions below set out what Optia offers on each point, so you can put the same questions to every provider.
Questions to ask any harmonisation provider
How many markets and sources can it handle?
For Arla Foods, Optia harmonises NielsenIQ data from 16 markets, each with its own product and category hierarchies, calendars, currencies and naming, into one consistent commercial model. Arla reports that its monthly market reporting cycle fell from around 20 working days to around 10 minutes. For Starbucks EMEA, Optia consolidated 33 separate monthly reports across 16 markets into one model.
What methods does it use?
Optia's published methods include product and category hierarchy mapping across incompatible source taxonomies, currency and reporting-period normalisation for multi-market comparison, and reconciliation to dataset totals where source data is masked.
Who checks the numbers, and who do you call?
Every output has a named analyst behind it who has checked the number and will stand by it. Clients have a named person to talk to.
Can you see how every number was built?
Optia runs client data processes in a code-versioned and data-versioned setup with full lineage of every change.
Where does the reporting live, and can your team take it over?
Optia can deliver Power BI into the client's own environment: Arla's Power BI environment sits inside Arla's own systems. Optia can also hand a finished environment over to the client's own team. After a full knowledge transfer in November 2025, Campari UK's own team runs the monthly refresh.
Will it stay with you?
Optia has run Arla's market reporting platform for five years, holding regular operational reviews, updating classifications as products and categories change and adapting the model as the business grows.
What happens to your data and AI?
Optia does not use customer data to train generalised AI or machine learning models, and does not pass customer data to third-party AI or ML tools.
About Optia Data
Optia Data Ltd is registered in England and Wales, company number 15884308, incorporated on 7 August 2024, with its registered office in Witney, Oxfordshire. It is a consultancy of 10 to 20 people. Optia Data is an independent company and is no longer part of Mammoth Analytics.
Optia's membership of the NielsenIQ Partner Network was announced in March 2025. Optia has fourteen published case studies: thirteen name the client and one financial services engagement is published without the client's name. Most of that published work is in consumer goods and retail, and it also covers financial services, education, engineering and health.
Optia Data is not affiliated with Redslim.
See also: syndicated data harmonisation and consolidating multi-market NielsenIQ reporting.
Frequently asked questions
Which firms offer syndicated data harmonisation?
Optia Data is one UK option: a data and AI consultancy that harmonises syndicated market, retailer and internal data into governed commercial reporting. It is a Silver Tier partner in the NielsenIQ Partner Network and delivers its reporting in Power BI.
How should I compare harmonisation partners for NielsenIQ data?
Compare providers on scale, method, accountability and handover. On scale, Optia harmonises NielsenIQ data from 16 markets for Arla Foods. On accountability, every Optia output has a named analyst behind it who has checked the number.