Where clarity meets customer
Grenelle Group is a global strategic advisory for companies at pivotal moments of growth.
We help luxury and premium brands solve the gap between fragmented customer experience, and the seamless, high-touch personalization that their target audiences expect. By fusing positioning narrative, audience data, and identity resolution, brands can improve how they recognize, understand, and engage their best customers across multiple channels.
Luxury and premium brands often understand craft, but struggle to translate that into the right story that can reach the right customers, on the right channels.
Expectations for seamless experience are expected. Our method helps brands successfully combine brand story, customer insight, and identity technology into intelligent, frictionless customer experiences at every touchpoint.
The Clarity to Customer™ Method
Our signature method supports brands seeking to better understand their customers, reach new audiences and engage them all across the devices that matter most.
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A diagnostic assessment of what’s working, what’s missing, and where your narrative, customer data, and identity infrastructure are misaligned.
Analysis of current messaging, positioning, and narrative
Assess customer data to identify gaps — evaluating existing customer data
Identity resolution, and technology stack for quality, compliance, and usability
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We craft market-ready messaging rooted in real expectations that reflects your trajectory, while connecting fragmented customer data into a single, resolved view. We translate your story, value proposition, and traction into strategic positioning that holds up under scrutiny — from customers, partners, or acquirers.
Messaging hierarchy, brand to commercial positioning
Cross-device and cross-channel identity resolution — connecting customer touchpoints into a cross-device targeting strategy.
Broker branded data partnerships to fill the gap between customers — sourcing and structuring data relationships that close the visibility gap between what you know and who your customers are.
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Deploy market-ready messaging, and activate data and identity technology across channels, and touch-points that matter — helping you speak directly to existing and future customers with precision, enhancing conversion, loyalty, and lifetime value.
Enrich your customer profiles: Improve customer recognition, loyalty segmentation, and personalization in your marketing campaigns.
Increase response rates & retention: leverage data and identity resolution to uncover untapped audiences and engage across digital devices.
Deliver targeted messaging: increase engagement, boost response rates, and grow loyalty across the channels your customers use
Other Services
Executive Personal Brand Narrative & Visibility
To signal trust, leadership, and visibility. Services include thought-leadership development and content plan, signature founder story, media-ready soundbites, and tone of voice guide.
Executive Styling and Visual Identity
For pitch day, speaking engagements, investor meetings, and media relations. Services include colour and style audit, capsule wardrobe, and shoot styling direction.
Who We Work With
We specialise in working with luxury and premium brands, and with Founders, C-Suite, and Heads of Strategy navigating:
Data and Identity Strategy for Luxury & Premium Brands
Personalization, Clienteling, and Retention
Fundraising (Seed to Series C)
Exit Preparation (M&A, PE)
Strategic Repositioning
Leadership Storytelling
Rebranding & Positioning
About
Katie Grannell founded Grenelle Group with the intention of driving growth for meaningful brands by combining story, data and technology and turning it into lasting legacy. With over 15 years spent moving between brand strategy and data infrastructure, she brings a rare dual fluency: shaping the narrative a brand tells the market, and unlocking the identity resolution and data strategy that make that narrative true to customers.
She is based in London and regularly travels to Europe, the US, and Asia to work with clients.
Testimonials
Trent Lloyd, Co-Founder of Eyeota, a Dun & Bradstreet company
Instrumental in transforming Eyeota’s vision into tangible market momentum. From early growth through to exit, Katie and the Grenelle Group’s strategic approach drove real traction across channels and regions. The work in executive branding directly influenced our successful sale to Dun & Bradstreet, making her an invaluable force behind Eyeota’s growth journey.
Don Lee, VP Partnerships, Definitive Healthcare
Collaboration was effortless, bridging marketing and sales with clarity, empathy, and a truly strategic mindset. Their data-driven approach consistently moves the business forward. I truly hope I have the opportunity to work with Grenelle Group again in the future.
Rob Armstrong, President, Biscred
Execution style was data-driven, proactive, and always focused on measurable impact. They consistently delivered results that elevated our market messaging and drove business growth. I highly recommend Grenelle Group for any business demanding sharp strategy and team leadership.
Julia May Yong, Founder, York House Designs
So helpful advising me on my brand development, really considering how my portfolio and company voice connect with my audience. In addition to that they have also helped me with some professional wardrobe styling which has given me so much more confidence in making myself and my company more visible.
Matthew Kearney, CEO, Creative Outdoor Advertising
Katie worked on North Star and executive brand projects for me this year. I highly recommend her and the Grenelle Group. In a highly collaborative and thoughtful process the end results were excellent and produced in a timely manner.
Let's Work Together
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