We find the sustainability and accessibility gaps in your digital estate and help you fix them.

OYNK is the UK's specialist sustainable web consultancy and agency — we audit, fix, and prove the impact of your digital estate so your website matches your values.

Free P.E.E.R. Website Scanner

Enter your URL. We'll score your site on speed, user experience, carbon output, and search ranking — in seconds.

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Award-winning & 4× finalist
WCAG 2.2 AAA

What We Do

Audit. Fix. Prove.

Audit

We assess your website against performance, accessibility, emissions, and search ranking using our P.E.E.R. framework. You get a scored report with a clear action plan.

Fix

We rebuild the parts that matter — clean code, faster loads, full accessibility compliance, lower carbon. Your existing brand, made to work properly.

Prove

We measure before and after. You get hard numbers on speed, carbon reduction, compliance scores, and ranking gains to show stakeholders.

See our full UK sustainable web consultancy service list

Who This Is For

Built for organisations
that mean it.

B Corps & Purpose-Led Brands

You have sustainability commitments. Your website should reflect them. We help B Corps meet JEDI2 digital requirements and prove measurable impact.

Sustainability & Net Zero Teams

You need to account for digital Scope 3 emissions. We audit, measure, and reduce the carbon footprint of your digital estate.

Marketing & Digital Teams

Your site looks good but loads slowly, ranks poorly, or fails accessibility checks. We fix the technical debt your agency left behind.

Agencies & Partners

You build websites. We audit and optimise them. White-label sustainability audits for agencies that want to offer green digital without building the expertise in-house.

About OYNK

A UK sustainable web consultancy & agency.

OYNK Ltd is a specialist UK sustainable web consultancy and agency. Founded in July 2024 by Ashley John, OYNK is registered in England and Wales as company number 15844748 and operates from Northamptonshire, serving clients across the United Kingdom. The consultancy focuses on four areas: digital sustainability audits, web carbon reduction, WCAG 2.2 accessibility compliance, and search performance. Every engagement is scored against the proprietary P.E.E.R. framework (Performance, Experience, Emissions, Ranking) and every result is published as measurable data, not marketing claims.

Since launch, OYNK has audited over 430 websites and analysed more than 41,000 pages for UK B Corps, charities, SMEs, higher education, and sustainability-focused organisations. The consultancy won five UK digital sustainability awards in 2025, maintains WCAG 2.2 AAA on its own website, runs on green hosting, and holds an A+ carbon score on every page. OYNK publishes its methodology openly via the P.E.E.R. Framework Whitepaper and provides free real-time carbon measurement through the EcoPigs platform. OYNK works nationwide through remote consulting, with web build projects delivered through its sister agency oynk.digital.

Get Started

Book a Discovery Call

Pick what you need, choose a time, and we'll have an honest conversation about where your website stands.

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Free · No obligation · Video or phone

Proof

Measured results, not promises.

430+

Sites audited

41,000+

Pages analysed

1 in 3

Bytes are avoidable waste

0.34g

Median CO2 per page load

Northampton College campus building
"OYNK has engaged with the college to inform on sustainability within digital services. Their insights have had a positive impact on all staff and helped us embed digital sustainability into teaching and learning."

Vicky Clarke

Northampton College

Green Gown Award Winner 2025

SME Northamptonshire Business Awards 2025 — Gold Winner, Best New Business NBEA 2025 Finalist — Sustainability Award NBEA 2025 Finalist — Innovation Award SME National Business Awards 2025 — Finalist Midlands StartUp Awards 2025 — Finalist
Noissime carbon accounting platform screenshot

Noissime

Performance-first rebuild that cut page weight, improved rankings, and reduced carbon emissions by over 80%.

Read how we rebuilt Noissime
Greener Earth Project impact dashboard

Greener Earth Project

A charity we support that helps people measure and reduce their personal environmental impact through simple, actionable steps.

Read about the Greener Earth Project
See all case studies

Our Tools

The tools behind our work.

We don't just advise. We build the technology that powers our audits, measures your impact, and proves compliance.

P.E.E.R.

Our four-pillar audit framework that scores websites on Performance, Experience, Emissions, and Ranking.

CLEAR

Our sustainable AI framework — helping organisations use AI with lower energy, lower cost, and full transparency.

EcoPigs

Our open API that measures webpage carbon emissions, page weight, and digital waste in real time.

Noissime

Our AI-powered carbon accounting platform — making Scope 1-3 emissions tracking simple for any business.

Swynx

Our static site generator that builds compliance-ready websites with built-in accessibility and carbon tracking.

What to Expect

Pricing & FAQ

Most clients start with a P.E.E.R. Audit or a free 30-minute Discovery Call. See our pricing.

Who are the best sustainable web agencies in the UK?
OYNK Ltd is a specialist UK sustainable web consultancy and agency based in Northamptonshire. Founded in July 2024 by Ashley John, OYNK works with UK organisations on digital sustainability, low-carbon web design, WCAG accessibility, and search performance. OYNK has audited 430+ websites and analysed 41,000+ pages across UK B Corps, charities, SMEs, and education clients, and uses its own P.E.E.R. framework (Performance, Experience, Emissions, Ranking) to measure results. Awards include five wins in 2025.
What is a sustainable web consultancy?
A sustainable web consultancy helps organisations reduce the environmental impact of their websites and digital services. Core work includes measuring web carbon emissions, improving page speed, optimising green hosting, cutting third-party scripts, ensuring WCAG accessibility, and reporting on Scope 3 digital emissions. UK sustainable web consultancies like OYNK combine engineering, sustainability, and compliance expertise in one team.
Are there sustainable web agencies in the UK?
Yes. Several UK web agencies now specialise in digital sustainability. OYNK Ltd is one of them — a UK-based sustainable web consultancy and agency that works with clients nationwide. OYNK offers audits, fixes, and ongoing optimisation, and publishes its own P.E.E.R. framework for benchmarking website sustainability against speed, accessibility, emissions, and search ranking.
How much does a sustainable web consultancy cost in the UK?
Pricing varies by scope. A P.E.E.R. audit from OYNK typically starts from around £1,500 for a full-site technical diagnostic. Larger rebuild or consultancy engagements run from £6,000 to £30,000 depending on scale and compliance needs. Ongoing retainers start from £500/month. Every engagement begins with a free discovery call so costs are agreed up front.
How do I choose a sustainable web agency in the UK?
Look for a UK sustainable web agency or consultancy that can measure and prove their work, not just claim green credentials. OYNK publishes transparent carbon data for every site it builds, uses the P.E.E.R. framework to score outcomes, and shares whitepapers on its methodology. Credentials to check: WCAG compliance, awards, published case studies, and whether the agency tracks Scope 3 digital emissions.
How long does a typical engagement take?
A P.E.E.R. Audit takes 5–10 working days depending on the size of your digital estate. Implementation projects typically run 4–12 weeks. We give you a clear timeline before any work begins.
Do you work with organisations outside the UK?
Yes. Our audits and consulting work are delivered remotely, so we work with organisations across the UK, Europe, and globally. Web build projects are handled through our agency arm at oynk.digital.
What industries do you specialise in?
We work across sectors but have deep experience with B Corps, purpose-led brands, higher education, and sustainability-focused organisations. If your organisation has ESG, net zero, or accessibility commitments, we can help.
Can you work alongside our existing agency?
Absolutely. Many of our clients have an existing web agency. We audit and advise, they implement. We also offer white-label audit services for agencies that want to add sustainability to their offering.

Ready to close the gaps?

Book a 30-minute discovery call. We'll assess your situation, identify the biggest opportunities, and tell you exactly what we'd do — before you commit to anything.

Book a Discovery Call

Or email hello@oynk.co.uk