Companies Using Gatsby in London: 119 Active Firms (2026)

Updated June 2026

London companies running static-site web frameworks use prebuilt front ends to publish fast content-led websites and digital services.

Gatsby users usually sit between marketing, product and engineering buying centres rather than a single IT budget. Adoption signals a company with public web properties where content operations, search visibility, release control and page performance matter enough to justify developer-owned front-end infrastructure. The common buyer is B2B and commercial rather than consumer-only: software vendors, property operators, managed-services firms and AI-adjacent teams using pre-rendered pages for marketing, documentation, recruitment and customer education. Engagements tend to be modest by enterprise-platform standards, often owned by lean web teams and agencies, but they imply recurring spend on hosting, content management, analytics and compliance work.

London has 119 actively trading companies running Gatsby, making this a specialist adoption cluster rather than a broad default for business websites. The employment footprint is also concentrated: these firms report 2,393 employees between them, although the typical user looks much smaller than the total suggests. Software-as-a-service and property-tagged operators are especially visible, with start-up, managed-services and AI categories also present. That mix points to public web estates where marketing, documentation, lead generation and product education sit close to the revenue process, rather than brochure sites maintained only as corporate hygiene.

No UK licence is required simply to run Gatsby, so the relevant controls sit around the website rather than the framework. ICO guidance on PECR requires operators to explain cookies or similar tracking, describe their purpose and obtain consent unless the cookie is strictly necessary for a requested online service; UK GDPR applies where personal data is involved. For public-sector work, GOV.UK guidance treats WCAG AA accessibility as the minimum standard for websites and mobile apps. Procurement also tends to involve hosting location, analytics configuration, content-governance processes and audit trails, especially where marketing teams rely on agencies or contractors.

Adoption appears likely to remain selective rather than universal. Gatsby fits organisations that want developer-controlled publishing and predictable front-end delivery, but it competes with hosted site builders, server-rendered application frameworks and content platforms bundled into wider marketing stacks. London users therefore tend to look like digitally mature small teams or mid-market operators with enough content volume to justify the architecture. Migration pressure may come from maintenance burden, plugin compatibility and the cost of keeping specialist skills in house. At the same time, firms with established static-site workflows may keep the stack where performance, governance and editorial reliability outweigh the appeal of consolidation.

What’s in the file

One row per company, 14 columns. The contact columns unlock when you get the list.

Included

Company name

Website

City & address

Companies House no.

Incorporation year

Turnover (£)

Employees

Headcount growth (YoY)

Financial-health score

Sales-readiness score

Unlock the contact columns

Decision-maker name

Role / title

Verified email

LinkedIn URL

Adoption by company size

Adoption of Gatsby rises with company size across the trading companies in this cohort. 0% of the 532,485 companies with under 10 employees run Gatsby (75 detected). 0.2% of the 15,364 companies with 10–50 employees run Gatsby (38 detected). 0.3% of the 1,763 companies with over 50 employees run Gatsby (6 detected). That is a 0.3% gap between the over 50 employees and under 10 employees bands.

119

Active firms

2026

Above £5M turnover

Trading firms

Median headcount

Filed accounts

284

Verified contacts

Across this cohort

Top companies using Gatsby in London

Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.

Company

Sales readinessHow strongly each company matches this list’s ideal-customer profile. An AI model assesses what each company does (from its website), its sector and size, and scores its overall fit 0–100. Companies are listed highest score first, so the best-fit prospects appear at the top.

Turnover

Employees

Growth (yoy)Year-on-year change in UK headcount, from filed accounts.

Financial healthComposite 0–100 score from recent XBRL filings (profitability, net assets, liquidity, cash, headcount). Bands: Strong, Healthy, Stable, Weak, Distressed.

Location

TRUELAYER LIMITED

Truelayer

FintechSaaSScale-up

2 employeesInc. 2016LondonCH 10278251

truelayer.com

Get all 223 companies as a spreadsheet

What’s in the file

Adoption by company size

Top companies using Gatsby in London

What else do Gatsby users run?

Who runs Gatsby in the UK?

How Gatsby usage is detected

Company data

Detection

Freshness

Gatsby elsewhere

Frequently asked questions