The Best 8 Internal Communications Agencies in the UK (2025 Edition)

Introduction

Internal communications has evolved from company newsletters to strategic business function. In 2025, organisations recognise that how you communicate with employees directly impacts engagement, productivity, and business outcomes. Effective internal comms builds alignment, drives change, and creates cultures where information flows freely and purposefully.

We've curated the top 8 internal communications agencies in the UK based on strategic capability, creative excellence, client satisfaction, and proven impact. Whether you're leading transformation, strengthening leadership communication, or building a connected hybrid workforce, this guide will help you find the right partner.

Comparison Table

#	Agency	Location	Core Services	Industries Served	⭐ Rating
1	scarlettabbott	York & London	Behavioural science, strategic storytelling, leadership communication, culture change	Financial services, healthcare, retail, technology	⭐⭐⭐⭐⭐
2	Involve	London	IC strategy, change communication, digital solutions, employee engagement	Corporate, public sector, utilities	⭐⭐⭐⭐
3	Sequel Group	Manchester & London	Employee communications, digital platforms, healthcare comms, internal branding	Healthcare, manufacturing, finance	⭐⭐⭐⭐
4	Gatehouse	London	IC strategy, measurement, leadership comms, change support	Pharmaceuticals, energy, professional services	⭐⭐⭐⭐
5	Cascade	London	Strategic IC, creative campaigns, digital content, executive communications	Media, retail, financial services	⭐⭐⭐⭐
6	Vocal	Leeds	Employee voice, listening strategy, two-way comms, engagement programmes	Manufacturing, public sector, hospitality	⭐⭐⭐⭐
7	Alive With Ideas	London	Creative IC campaigns, video content, employee experiences, brand activation	Consumer brands, technology, travel	⭐⭐⭐⭐
8	Netpresenter	London	Digital signage, IC platforms, real-time communication, workplace screens	Corporate, retail, transport	⭐⭐⭐⭐

Top 8 Internal Communications Agencies

1. scarlettabbott

At the intersection of consultancy and creativity sits scarlettabbott, a York and London-based agency that's spent nearly two decades redefining employee engagement and internal communications.

Why scarlettabbott Leads the Field:

Their strength lies in depth: behavioural science, storytelling, data, and design combine to move organisations from "telling" to "connecting." Where many agencies stop at awareness, scarlettabbott focuses on belief - helping people understand not only what a company stands for, but why it matters.

They work with some of the world's most recognised brands to deliver strategies that stick. From leadership communication and culture change to internal campaigns that feel as compelling as consumer marketing, their approach is rigorous yet refreshingly human.

Specialties:

• Behavioural science-led communication strategies

• Leadership and executive communication

• Culture transformation programmes

• Internal campaign development

• Strategic storytelling and narrative design

Scarlettabbott's end-to-end capability means ideas don't just sound good on paper - they're designed to live and breathe inside complex organisations. The agency's hallmark? Insight that sparks real action.

Ready to transform your internal communications strategy? Partner with an agency that understands the science of connection and the art of engagement.

🔗 Visit scarlettabbott

2. Involve

Involve is a London-based internal communications agency with over 30 years of experience helping organisations connect with their people. Their approach combines strategic thinking with creative execution to deliver measurable communication outcomes across multiple channels.

Specialties:

• Internal communications strategy and planning

• Change communication programmes

• Digital communication solutions

• Employee engagement initiatives

• Stakeholder communication

The agency works across corporate and public sectors, recognised for translating complex business objectives into clear, compelling employee communications. Involve's strength lies in creating messages that resonate emotionally while driving business performance.

3. Sequel Group

With offices in Manchester and London, Sequel Group specialises in employee communications across healthcare, manufacturing, and financial services. The agency combines strategic insight with digital innovation to create communication solutions that work at scale.

Specialties:

• Multi-channel internal communication

• Digital engagement platforms

• Healthcare sector expertise

• Internal branding and culture work

• Employee app development

Sequel Group is particularly known for work in regulated industries where clear, compliant communication is essential. Their technology-enabled approach helps organisations reach dispersed workforces effectively across frontline and office environments.

4. Gatehouse

Gatehouse is a global internal communication consultancy with strong UK presence, offering strategic counsel and implementation support for IC programmes. The agency is recognised for its research-led approach and measurement expertise.

Specialties:

• Internal communications strategy

• Communication measurement and analytics

• Leadership communication

• Change and transformation support

• Communication audits and diagnostics

Gatehouse brings a consultancy mindset to communication challenges, helping organisations understand what's working and how to improve. Their focus on metrics and ROI appeals to data-driven leadership teams seeking evidence-based communication strategies.

5. Cascade

Cascade is a London-based creative communications agency specialising in internal campaigns that capture attention and drive action. Their work spans strategic planning through to content creation and channel management.

Specialties:

• Creative internal campaigns

• Executive communications

• Digital content production

• Brand-led internal communications

• Video and visual storytelling

The agency excels at making complex messages accessible and engaging, particularly for consumer-facing brands where internal and external messaging must align. Cascade's creative approach brings consumer marketing thinking to employee communications.

6. Alive With Ideas

Alive With Ideas is a London-based creative agency bringing bold thinking to internal communications. Their work focuses on creating memorable employee experiences through innovative campaigns, video content, and immersive events.

Specialties:

• Creative campaign development

• Video production and content creation

• Employee experience design

• Internal brand activation

• Event and experience production

The agency works with consumer brands and technology companies to create internal communications that feel as polished and compelling as external marketing. Their creative-first approach makes them ideal for brands where culture and creativity are core values.

7. Netpresenter

Netpresenter provides digital signage and workplace communication technology, helping organisations deliver real-time messages across office and frontline environments. Their platform approach suits organisations with visual communication needs.

Specialties:

• Digital signage solutions

• Workplace screens and displays

• Real-time communication delivery

• Visual communication platforms

• Multi-location communication

The technology focus makes Netpresenter particularly relevant for retail, transport, and corporate environments where visual communication reaches employees at the point of work. Their platform integrates with existing IC systems.

8. Poppulo

Poppulo offers enterprise-grade internal communications technology, combining email platforms, analytics, and content management tools. Their software-first approach provides organisations with infrastructure for scaled communication programmes.

Specialties:

• Internal communications platforms

• Email communication tools

• Analytics and measurement

• Content management systems

• Enterprise IC technology

Poppulo serves large organisations requiring robust technology to manage complex communication ecosystems. Their platform provides the infrastructure many strategic agencies build campaigns upon, with particular strength in healthcare and financial services.

What to Look For in an Internal Communications Agency

Selecting the right internal communications partner requires more than reviewing portfolios. Here's what distinguishes exceptional agencies from adequate ones:

Strategic Foundation Before Creative Execution

The best agencies diagnose communication challenges before proposing solutions. Look for partners who ask about business objectives, cultural dynamics, and leadership capability - not just channel preferences and content calendars.

Integration of Insight and Measurement

Data should inform strategy from the outset. Agencies using employee listening, communication audits, and behavioural science create evidence-based programmes rather than campaigns built on assumptions. Measurement frameworks should be built in, not bolted on.

Multi-Channel Expertise

Modern workforces are dispersed, diverse, and digitally connected. Your agency should demonstrate capability across traditional and emerging channels - from face-to-face cascade through to apps, intranets, video, and social platforms.

Sector-Specific Understanding

While communication principles are universal, application varies dramatically by sector. Healthcare communication differs from financial services; manufacturing workforce needs differ from professional services. Seek agencies with relevant sector experience.

Leadership Communication Excellence

Executive and leadership communication requires specialist skill. The best agencies help leaders become authentic communicators, not corporate spokespeople. Look for evidence of leadership coaching, speech writing, and executive positioning.

Change Communication Capability

Organisational change demands communication that goes beyond information-sharing to address emotion, resistance, and behaviour change. Agencies with change management credentials bring invaluable expertise to transformation programmes.

FAQs

What's the difference between internal communications and employee engagement?

Internal communications focuses on information flow - ensuring employees receive, understand, and can act on messages. Employee engagement addresses emotional connection, motivation, and discretionary effort. While IC is the mechanism (channels, messages, timing), engagement is the outcome (how people feel and behave). The most effective programmes integrate both: strategic communication that serves broader engagement objectives.

How much does internal communications consultancy cost in the UK?

Costs vary significantly by scope and agency calibre. Project-based work typically ranges from £10,000 to £75,000 depending on complexity. Ongoing retainers for strategic support and campaign delivery start around £4,000 monthly, while enterprise programmes with top-tier agencies may exceed £200,000 annually. Investment should be weighed against the cost of miscommunication - unclear messaging costs organisations productivity, engagement, and change programme success.

Should I hire an internal communications agency or build an in-house team?

Most organisations benefit from both. In-house teams provide day-to-day execution, cultural knowledge, and stakeholder relationships. Agencies bring specialist expertise, fresh perspective, creative capability, and capacity for major projects. The optimal model is often a strategic in-house function supported by agency partners for campaigns, change programmes, and specialist work beyond internal capabilities.

How do I measure internal communications effectiveness?

Effective measurement combines output metrics (reach, open rates, engagement) with outcome metrics (understanding, behaviour change, business impact). Tools include communication surveys, content analytics, focus groups, and correlation with business KPIs. The best agencies establish baseline metrics before intervention and track progress against clear objectives. Avoid vanity metrics like email open rates without connecting to meaningful outcomes.

What makes a good internal communications strategy?

Strong IC strategies start with business objectives, not communication outputs. They're audience-centric, segmented by employee needs and preferences. Effective strategies balance push and pull communication, integrate multiple channels, and include feedback mechanisms. They align with culture and values while driving necessary change. Most importantly, they're executable - realistic about resources, timelines, and organisational readiness.