Custom GPT development for businesses
Turn your business knowledge into a Custom GPT your team can actually use. We structure your approved information, tone of voice and working processes into a practical AI assistant, with clear boundaries and human judgement built around it.
About our Custom GPT service
Turn your business knowledge into a useful AI assistant
Your team already has valuable knowledge spread across documents, websites, processes and people. We bring that information together and use it to configure a Custom GPT around a clear job, whether that’s helping your marketing team draft content, giving colleagues faster access to internal knowledge or supporting repeatable customer-service tasks.
We structure the knowledgebase, write the instructions, define what the GPT should and shouldn’t do and test how it responds when information is incomplete or unclear. The aim isn’t to remove people from the process. It’s to make useful knowledge easier to access and repetitive work easier to handle, while keeping your team in control.
Our Custom GPT development services
- Use-case discovery and Custom GPT planning
- Knowledgebase structure and organisation
- Custom instructions and operating rules
- Tone of voice and brand guidance
- Guardrails, boundaries and human review
- Testing across realistic prompts and edge cases
- Team training and practical adoption support
- Ongoing refinement as your knowledge changes
Why work with us?
- We start with the problem, not the AI
- Your approved knowledge shapes every Custom GPT
- Brand voice, processes and boundaries are considered together
- We test realistic questions, not just ideal prompts
- Human review stays part of the workflow where it matters
- Your team learns how to use and improve the GPT confidently
Build your Custom GPT around a real task
A useful Custom GPT starts with a clear job. That could be helping your marketing team work from approved brand information, giving colleagues a quicker way to find internal guidance or supporting the first draft of repeatable documents.
We map what the person needs to achieve, what information the GPT can use and where someone still needs to check, approve or make a decision. That keeps the assistant focused and makes it easier for your team to understand when to use it and when not to.
Test, learn and improve over time
A Custom GPT isn’t finished simply because it gives a good answer during a demonstration. We test realistic questions, incomplete requests and situations outside its intended scope to understand where the instructions or knowledge need improving.
As your services, processes and approved information change, the GPT can evolve with them. We can help your team review how it’s being used, update the knowledge behind it and refine the guidance where recurring problems appear.
Client Testimonials
Make your approved knowledge easier to use
A Custom GPT can give your team one practical way to work with information that would otherwise sit across folders, documents, websites and individual people’s heads.
The value comes from deciding what information belongs in the assistant, giving it clear instructions and keeping that source material under review. Your team still brings the experience, context and judgement. The GPT helps them reach and use the relevant information more efficiently.
Need more than a Custom GPT? If the requirement involves a standalone application, specialist interface or deeper system integrations, our software team can explore a better route.
Ready-made marketing AI with Cleeo
Not every business needs a bespoke development project. We built Cleeo, our marketing AI assistant, for teams that want a shared way to create content around their brand, services and agreed messages.
Cleeo gives your team templates and instructions for website copy, emails, social content, campaign ideas and other regular marketing tasks. Approved users can share conversations and develop work together, with your company information providing a consistent starting point.
The platform is ready-made and configured around your business, so you don’t need to commission software from scratch. Your team still checks the facts, develops the ideas and approves the final content.
Custom GPT development from our Surrey team
Our studio is at Priory Farm in Nutfield, with our registered office in Reigate. We work with businesses across the UK and internationally.
Tell us what knowledge your team needs to access more easily or which repetitive task you’d like to improve. We’ll help you work out whether a Custom GPT is the right approach. Call 0330 133 0304 or send us an enquiry.
Your custom GPT questions, answered
What is a Custom GPT?
A Custom GPT is a version of ChatGPT configured around a particular purpose. It can be given specific instructions, reference approved information and follow defined rules about how it should respond. We use those capabilities to create assistants around real business tasks rather than general-purpose conversations.What can a Custom GPT help our business do?
Use cases can include marketing support, internal knowledge, customer-service assistance, research, document drafting and other repeatable tasks. We start with the problem you want to solve before deciding whether a Custom GPT is the right format.Can a Custom GPT use our own business knowledge?
Yes. We can structure appropriate approved information so the GPT has useful context around your services, processes, terminology and ways of working. We also consider what information should not be included and how that knowledge will be maintained.Can it follow our tone of voice and brand guidelines?
We can build your approved tone of voice, terminology and writing rules into the instructions and supporting knowledge. That helps routine outputs stay closer to your brand, although human review is still important before content is published or used for important decisions.How do you test a Custom GPT?
We test realistic prompts, incomplete questions, edge cases and requests that fall outside its intended role. That helps us identify where instructions need tightening, information is missing or the GPT should make its limitations clearer.How do you approach privacy and sensitive information?
We consider what information the GPT genuinely needs, who should have access and whether the proposed use is appropriate for the information involved. The relevant platform settings and data arrangements also need to be understood before sensitive or confidential information is used.Can a Custom GPT connect with our other systems?
Some requirements may go beyond what is sensible within a Custom GPT. If you need deeper integrations, a dedicated interface or a standalone application, we can assess whether bespoke software or a wider AI solution is more appropriate rather than forcing everything into one tool.Can you update the GPT after launch?
Yes. Business information and processes change, so the GPT may need its knowledge and instructions refined over time. We can help review recurring issues, update approved information and improve how the assistant handles its intended tasks.
