AI consultancy · London · Est. 2025
AI consultancy,
priced in the open.
We design, build and integrate AI software for UK businesses. Our quotes come from a cost model we publish, so you can run your own number before you talk to us.
The model is appdevelopmentcostcalculator.com, which we built. It opens in a new tab.
How a Digital Signet quote is made
- 01
Hours
From a cost model anyone can run. The quote lists them by category, with the inputs that produced them.
- 02
AI running costs
At cost, on their own line, or billed to your own provider account.
- 03
Early delivery
Hours left unused on a fixed-price phase are credited.
- 04
Exclusivity
None. You can work with other firms alongside us.
The record, with dates
All evidence →- Domains live and ours
- 501
- Sites with Search Console presence
- ~370
- AI assistant visits to one site
- 109
- Hours from domain to gated release
- <22h
domains confirmed live and ours. 381 of them are deployed sites we built and run.
of those sites with Google Search Console presence, so their search performance is on record.
visits in 28 days from Gemini, Claude, ChatGPT and Perplexity to one of our sites, egresscost.com.
from registering a domain to a live cost model with a 87,048-assertion check.
Three kinds of work, each priced from its own logic
AI product development
New apps and products with AI inside them, built the AI-native way: agents write most of the code, and people own the design, the review and the testing.
Pricing logic · Priced from the model's AI-native hours for your scope.
AI integration and automation
Language-model features added to systems you already run: search over your own documents, drafting, triage, extraction, assistants for staff.
Pricing logic · Feature hours from the model, plus usage at cost.
AI advisory and quote review
A second opinion on an agency quote, a build-or-buy call on an AI feature, or a scoped readiness review for a team about to spend.
Pricing logic · A fixed number of days, stated before we start.
Five questions to ask any AI consultancy, with our answers
- Q1
Which pricing model is this quote on, and why that one for this project?
Ours: Fixed price for each phase whose scope is written and signed. Time and materials, with a monthly cap, for work we both expect to move.
- Q2
Do your estimates assume AI-assisted working, or the way the work was done before?
Ours: They assume AI-assisted working, because that is how we build. The hours come from the AI-native column of a model we publish, category by category.
- Q3
How will AI model and API costs appear on our invoices?
- Q4
Who owns the code, prompts, evaluation sets and model configuration this work produces?
- Q5
What happens to the price if the scope is delivered early?
An app cost model, from domain to gated release in under 22 hours
We registered appdevelopmentcostcalculator.com and shipped a sourced cost calculator on it, with two independent hour models and a test gate that checks the site's sources, its arithmetic and the example figures its pages print against the engine that produced them. The gate found a labelling fault in our own model before a reader did; we fixed it in a separate, labelled commit.
2 Oct, 11:32 UTC
Domain registered
2 Oct, 12:39 UTC
First 15-page build live on its preview host
2 Oct, 22:44 UTC
Live on appdevelopmentcostcalculator.com
3 Oct, 09:06 UTC
Engine and 87,048-assertion gate shipped, gate passing
What AI did to the cost of software, measured
Essay · 3 Oct 2026
What a UK AI consultant costs, and why the guides disagree
Three published guides give three different prices for a "boutique" day. The one source that counts its data reports a median of £575.
Essay · 3 Oct 2026
The code got cheaper. Who keeps the difference?
In our published model, code hours fall by about 70% while testing does not move. Whether you see that saving depends on one clause.
Who you deal with
Digital Signet is run by Oliver Wakefield-Smith, who has spent more than twenty years building software as a developer, tech lead, engineering manager and architect. AI agents write most of the code now. He directs them and checks what they produce.
About Digital SignetStart a conversation
Send us a scope, or a link to your numbers in the model. We reply with questions or a quote.