If you are searching for a digital transformation agency in London, you will find agencies, consultancies and independents listed side by side, and they are not the same thing. The right choice depends less on the firm than on the type of problem you have and how clearly you can describe it.
I run a consultancy, so weigh my view accordingly. I will state the trade-offs as I see them, including those that count against firms like mine.
The three models, in plain terms
London has suppliers of every size, and the labels on their websites are used loosely. As a rule of thumb:
- Agency: a larger team with defined roles, such as project managers, designers, developers and testers. You usually buy a defined build or programme of work.
- Consultancy: a smaller, advice-led firm that diagnoses the problem, recommends an approach and often delivers it too.
- Senior independent: one experienced person working alone, sometimes with associates brought in for specific tasks.
Because the websites of digital transformation companies in London can look almost identical, the differences show up in the first conversation and in the contract, not on the page.
Where Henderson Digital sits
We are a consultancy in the sense above. We start by understanding how a business actually runs, then recommend what to do, and we also build: bespoke software, process automation, system integration and AI implementation.
That has a cost. Diagnosis comes before building, which can feel slow if you want to see something built straight away. And if you already hold a detailed specification for a large programme, an agency with a full delivery team is probably closer to what you need.
Who actually does the work
I would ask this first, because it affects everything else.
In a larger agency, the people who sell the work are often not the people who do it. That is not a flaw; it is how a bigger team stays busy and delivers at scale. But you should know who you will deal with day to day, and whether the person who understood your business in the first meeting is still involved in month three.
With a senior independent, you get one person’s judgement throughout. The risk is concentration. If they are ill, overbooked or move on, there is no bench behind them, and a large build may be more than one person can deliver in a sensible timeframe.
A consultancy sits between the two, though this varies by firm. Ask for names, roles and who will be on your project.
How scoping happens
Scoping is where first-time buyers most often get caught out.
Many agencies scope by quoting against a specification. That works well when you already know what you need. If you do not, you end up specifying a solution before anyone has understood the problem, and later changes become formal change requests.
An advice-led consultancy or independent usually starts with how the business runs: where work gets stuck, where data is retyped, where one person’s knowledge holds a process together. The output is a recommendation, which might be software, automation, an integration between systems you already have, or simply a tidier process. How to map the way your business actually works explains the groundwork.
Location matters here more than people expect. Ask whether the supplier will come to your premises. Seeing the office, the shared drive and the person who keeps the process going tells them more than a video call usually does.
Where the cost sits
I will not quote typical day rates or project costs, because they vary too widely to be useful. Instead, here is where the cost tends to sit.
- Agency: overheads and team structure are built into the price. You pay for project management, process and capacity, which is valuable on a large build and wasteful on a small one.
- Consultancy: cost often concentrates in senior time during diagnosis, with delivery priced separately. Check whether advice and build are contracted separately.
- Independent: usually lower overheads, but you are paying for one person’s availability. Delays tend to come from capacity rather than cost.
Whichever you choose, ask what happens if the scope changes, who owns the code and documentation at the end, and what ongoing support costs. Those answers turn a reasonable quote into an expensive project, or prevent it.
Three illustrative scenarios
These are hypothetical, but they are the kinds of situation I see owners describe.
A small professional services firm quotes in spreadsheets, retypes the figures into its accounting system and suspects the process is the problem. The owner cannot say whether the answer is software, automation or a change of habits. A consultancy or independent that diagnoses first fits better than an agency that would need a specification on day one. Signs your business has outgrown its spreadsheets covers the symptoms.
An operator has already decided, with an internal operations lead, exactly what a new customer-facing system must do. The requirements are written and someone on staff can manage the supplier. This is agency territory, because the job is delivery at scale.
A business needs two existing systems to share data, and nothing more. The task is narrow and clearly bounded. A capable independent can do it well, provided you are comfortable with the single point of dependency and have asked about cover.
Lowering the risk of a first engagement
Whichever route you take, start small. A short, fixed-price piece of work that produces something usable is safer than a long contract signed on the strength of a proposal.
That is how we begin. A Transformation Day is a fixed-price day, often on site, at £600. It produces a prioritised roadmap, and there is no obligation to go further. What a Transformation Day actually looks like describes how the day runs.
Any supplier worth hiring should be comfortable with a low-commitment first step. If one is not, ask why.
If you are weighing a consultancy specifically, our page on digital transformation consultancy in London sets out how we work. For a wider checklist of questions to put to any supplier, see how to choose a digital transformation consultant.
FAQs
Is an agency or a consultant better for a small business?
Neither is better by default. An agency suits a well-defined, larger build. A consultancy or independent usually suits an owner who needs the problem diagnosed first. The deciding factor is how clearly you can already describe what you need.
Why do agencies and consultancies quote so differently?
They are often pricing different things. One may be quoting a build against a specification, another a period of diagnosis and advice. Compare what is included, who does the work and what is excluded, not just the totals.
Should I hire a senior independent instead?
It can work well for focused projects where you value one person’s judgement. Ask about cover for illness and holidays, and whether the scale of the project is realistic for one person.
Do I need to know what software I want before I start?
No. It is often better not to, because the right answer may be a process change or an integration rather than new software. Starting with the problem keeps your options open.
How much does the first conversation cost?
The first call costs nothing. A Transformation Day costs £600 and carries no obligation to continue.
A sensible next step
If you are comparing options and want to talk through which type of supplier fits your situation, the first call costs nothing. If it helps to read first, our approach to digital transformation explains how we work.
