# Best AI Agencies for Mid-Market Firms in London

> 5 agencies. Top-ranked: Vention, Kortical, Datasparq.

Canonical page: https://www.aiagencies.eu/for/mid-market/london
Generated: 2026-09-28 · Curated by Gabor Kiss · No paid placements — inclusion, score, and rank are never sold.

## Ranked roster
1. **Vention** — London, United Kingdom · €45-85/hr (directory-listed) · team 1000+ · founded 2002 · services: AI Development, AI Consulting, AI Agents · 10 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/vention
2. **Kortical** — London, United Kingdom · €85-130/hr (directory-listed) · team 2-9 · founded 2016 · services: AI Consulting, AI Development, Generative AI · 8 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/kortical
3. **Datasparq** — London, United Kingdom · rate not published · team 50-249 · founded 2018 · services: AI Consulting, AI Development, AI Agents · 6 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/datasparq
4. **Nebuli** — London, United Kingdom · rate not published · team 2-9 · founded 2019 · services: Generative AI, AI Development, AI Consulting · 5 documented client engagements with source URLs · reviewed 2026-09-07 · https://www.aiagencies.eu/agency/nebuli
5. **NOVOS** — London, United Kingdom · €130-170/hr (directory-listed) · team 10-49 · founded 2018 · services: AI SEO, AI Marketing · 5 documented client engagements with source URLs · reviewed 2026-09-23 · https://www.aiagencies.eu/agency/novos


## About this market
London's mid-market bench sells different shapes of engagement, and the documented work shows what each leaves behind. Kortical has the clearest measured deliveries: a six-month Deloitte build that took a tax computation from five hours to six minutes at above 90% accuracy, NHS Blood and Transplant platelet forecasting reported at a 54% cut in expiries, and a Shopify support chatbot for The Edit LDN at 88% lower support costs. Datasparq's RS Group engagement is a recommendation engine serving more than 1.3 million DesignSpark members at sub-second latency. Nebuli documents one private-cloud deployment end to end, the UK Sports Institute, on its own Nano Workspace and AIQ models. Vention's studies describe dedicated teams held for years, Kafene's growing from two to seven engineers since 2022, with AI a thin line inside the software work. NOVOS reports Osprey's share of AI answers up 21.4 points to 72.6% through SEO and digital PR, no system built.

For a company of 200 to 1,000 people with no ML team to hand to, the sorting question is what you hold when the invoices stop. Kortical sells its platform with the people, so ask what the license costs afterward and whether the models run without it. Nebuli's Nano is supported by a registered headcount of 2-9, so ask who operates it. NOVOS prices retainers against its own 20-point Signal score, so agree independently measurable targets. Vention delivers from centers across Europe and Asia with London as point of contact, so ask where your team sits.

## Questions buyers ask

### How many AI agencies work with mid-market in London?
5 agencies in our directory combine verified mid-market client evidence with a London base. The current top-ranked are Vention, Kortical, Datasparq — ordered by depth of documented client evidence, then our editorial scoring (portfolio quality, credibility, completeness); placement is never paid.

### How much does an AI agency cost in London?
Published rates across this page's agencies run €45–170 per hour (median ~€108). Project totals depend on scope — the rate index at /rates breaks the computed bands down by region, country and team size.

### How is mid-market experience verified on this page?
Each listed agency has at least two documented, named mid-market clients — published case studies or engagement descriptions our research actually read, with source URLs stored per client. Logo walls without published evidence carry no weight, which is what separates this list from self-declared directories.

---
Source: AIAgencies.eu — the curated register of European AI agencies. Rate provenance: "agency-confirmed" = disclosed via submission or claimed profile; "directory-listed" = Clutch or two agreeing B2B directories (lone unverified sources are never written). Full method: https://www.aiagencies.eu/methodology · Rate index: https://www.aiagencies.eu/rates