The trusted HCM & Payroll software for the UK&I
Thousands of organisations across the private and public sectors choose to work with us. Backed by decades of experience, our AI-enabled HR and payroll solutions are secure, compliant, and recognised with industry awards year after year.
Trusted by leading global clients
Organisational success is dependent on real work in action
Work doesn't just happen in offices.
It happens on factory floors and shop floors, in hospitals, classrooms, call centres, restaurants, loading bays and supermarkets. Wherever real work gets done, the success of our economy is won by the workers and managers who get it done every single day.
This is work that is human, shift-based, time-sensitive, high-pressure and on-the-go, and it is what powers the UK and Ireland economy.
Existing workforce systems were not built for how the world is changing
UK and Ireland organisations are under new pressures: economic restructuring, the inevitability of AI disruption, and a great work squeeze that hits workers and managers first, and hardest.
- 59%of workers will need to be reskilled within three years.
- 73%of leaders believe labour costs are hurting margins
- 380,000+retail jobs have disappeared since 2015.
The People Powering the Economy
Worklife reinvention means redesigning how work gets done for the people who keep the economy moving.
The next generation of UK and Ireland winners will lead with worklife that is trusted, personalised, faster and adaptive: not one-size-fits-all systems, but experiences built around the reality of modern work.
Existing workforce systems were not built for how the world is changing. Organisations can no longer run effectively on software that is inflexible, friction-filled, too slow, siloed, unreliable and disconnected from modern worklife.
Zellis exists to change that. We are the trusted HCM foundation for the organisations powering the UK and Ireland economy.
The Zellis Difference
We design all our AI-enabled solutions and services to help you manage risks. Security and compliance is built into our technology, so you’ll always be up to date with UK and Irish regulations.
Powering the UK&I, together
- Purpose-built for complex UK and Ireland industries: multi-site, shift-based, unionised and variable-pay.
- Proven at scale, where reliability matters most.
- Modern, secure and capable.
Applied AI
for real work
- An intelligent platform built on structured, AI-ready data.
- Practical AI embedded in everyday worklife.
- Trusted, governed AI for high-confidence decisions.
Shaped
for you
- Adaptable workflows and employee experiences for every organisation.
- Modular: start where it matters, and evolve over time.
- Flexible integrations across your ecosystem.
Unlimit what’s
next with ZellisONE,
The trusted HCM PLATFORM
- A purpose-built platform that handles any complexity with ease.
- Configurable software that adapts to your organisation, never force-fit.
- A secure AI platform that does the work, built around privacy and permissions.
- In the flow of daily worklife: connected HR, workforce management, pay, talent and benefits.
- Runs at new speed, reducing lag across hiring, scheduling, payroll and compliance.
What’s next is confidently compliant
We design all our AI-enabled solutions and services to help you manage risks. Security and compliance is built into our technology, so you’ll always be up to date with UK and Irish regulations.
27001
A vision that shapes what's next
We bring out the best in people and drive businesses forward with cutting-edge, human-first, AI technology.
Our approach to sustainability
We believe that employee experiences can be a catalyst for change. Our environmental, social and governance policies ensure that our impact can go even further.
Don’t just take our word for it
"We know with Zellis, that the technology is underpinned by a market-leading provider. It’s amazing to see that partnership of tech and strategy delivered to our employees."
“Supported by Zellis, we see our role as treating the employee as a customer and want to give them an exceptional customer experience from end-to-end.”
"We could not imagine working without Zellis: using their payroll functions, HR functions, and employee self-service systems. They’ve been by our side for so long now."
Reimagine what's possible
No matter your starting point, we help you move forwards: from assessing your current maturity, to a programme of work for the opportunities that matter, to execution and change.
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