Content Marketing Agency

Acceleris

PR and reputation management agency, now trading as Definition, serving corporate clients, senior executives and entrepreneurs

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TrustList summary

Acceleris was a PR and communications agency that bought Limelight and then combined both firms under a single new brand, Definition. The merged agency handles corporate communications and personal brand work for clients in the UK and abroad, with offices in London and Leeds.

Services

Reputation management: helping companies, executives and entrepreneurs shape, promote and protect how they are seen.
Corporate communications: media relations and messaging for large organisations.
Personal brand work: profile building for senior leaders and business founders.
B2B PR: press and publicity for business-to-business firms.
B2B social media and SEO: online visibility work run by specialists in those channels.

Clients

The agency works across tech, engineering, legal, education, transport and healthtech. Named clients include EY, the intellectual property firm HGF, construction services company Rhodar, maritime pensions provider Ensign and the Association of Charitable Organisations.

Key facts

Offices: London and Leeds
Team: around 30 people, including former print and broadcast journalists
Current name: Definition, formed from Acceleris and Limelight
Recognition: more than 60 awards in the UK and internationally, including European Communications Excellence Awards for issues and reputation management

Summary written by TrustList from the business's own published information, Sep 2026.

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Categories & features

Rankings

Acceleris is ranked on 3 TrustList rankings: #4 on 1, #19 on 1 and #27 on 1.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Acceleris has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

Content marketing agency · 3 rankings

#4of 74
Supply chain logistics and transport
It is one of 13 here listing non profit and one of 16 here listing real estate.
Of the top 57 here, 25 also cover consumer products & services and 24 also cover business services.
Behind A&A Associates, ahead of Agência Digital Experience.
#19of 229
Real estate
It is one of 6 here listing supply chain, logistics, and transport and one of 17 here listing retail.
Of the top 75 here, 28 also cover financial services and 27 also cover medical; 3 also work in York and 3 also work in Hyderabad.
Behind Digital Consulting Group, ahead of Agent Easy Site.
#27of 31
London
It is one of 8 here listing medical.
Its profile: “The merged agency handles corporate communications and personal brand work for clients in the UK and abroad, with offices in London and Leeds.”
Of the 31 here, 18 also cover advertising & marketing and 18 also cover SEO; 3 also work in Reading and 2 also work in Wales.
Behind GoldSand Digital, ahead of JeffreyM Consulting.