Digital’s dirty secret. What sustainable digital agencies should be doing about it.

Building websites, apps, and digital products is what we do. We love it, and we’re proud to work in this industry. But like any industry, digital has a footprint, often unseen because we aren’t spewing out fumes from our office or running a fleet of HGVs, but the work we do still has a very real impact on the planet. 

The invisible impact is the easiest to ignore, and that’s exactly why this matters so much. Let’s break it down. Your website lives on a physical server somewhere, drawing power every hour of every day. The data centres that keep the internet running consume a staggering amount of energy, more than the global aviation industry. Every page load, every image, every plugin quietly runs in the background. It all adds up, and most businesses have no idea.

A real, sustainable digital agency will understand that building sustainably and building brilliantly turn out to be pretty much the same thing. Efficient code is clean code, and fast websites use less energy and convert better. Greener choices in how you run a business tend to be smart choices by default. It’s win-win! So why wouldn’t you want a sustainably built digital product?

If you’re looking for a digital agency that takes sustainability seriously, here’s what that should look like and how we approach it ourselves at Hiyield.

What does a sustainable digital agency actually do?

Sustainable agency” is everywhere right now. On websites, in pitches, in email footers. So, it’s worth knowing what separates the agencies that mean it from the ones who’ve written it on their about page and left it at that. 

A genuinely sustainable digital agency makes environmental and ethical decisions at every single level, not just in the work they deliver to clients, but in how they run as a business, the hosting they use, the clients they take on, where their money sits, and how they treat accessibility. 

The tick box version is easy, the reality is more complex and takes years of work to build a foundation and continued work to maintain it.

Start with how they build

The most direct environmental impact a digital agency has is in what it actually produces.

A bloated, inefficient website uses more energy every single time someone loads it. Oversized images, unnecessary scripts, third-party plugins that have been gathering dust for years, it all costs something. Multiply one inefficient page load across thousands of visitors, and you’ve got a meaningful carbon footprint.

A sustainable agency builds light. Assets are compressed (and anyone who uses the site knows it), clean code, no dead weight. A leaner website doesn’t just use less energy. It loads faster, ranks better, and converts better, too. 

Before considering any agency, looking at their approach to performance and efficiency will tell you a lot. 

At Hiyield, we host websites on servers powered by 100% renewable energy. Not as a premium tier, it’s just standard because it matters.

Look beyond the work

This is where a lot of agencies stop. But if the business itself isn’t running in a sustainable way, none of it matters.

Where does the agency bank? Traditional high street banks are quietly major financiers of fossil fuel projects. The money sitting in a standard business account gets lent out, and for most big banks, some of that goes to oil and gas. At Hiyield, we moved our business banking to Tide, whose partner ClearBank holds funds at the Bank of England rather than lending them out. Our pensions moved to Penfold for exactly the same reason.

These are small decisions, but real ones with a huge impact.

Ask about accountability

Anyone can write  “we care about the planet” on a website. The question is what’s holding them to account for it? 

B Corp certification is one of the more meaningful signs. It’s an independent assessment across governance, workers, community, environment, and customers. You have to hit a verified score, and recertification every three years ensures you are continually held to account. Plus standards are always evolving, so it keeps complacency at bay and us on our toes.

We’re B Corp certified, and it’s something we’re so very proud of. It’s not just a badge for us, it’s a framework that gives us something real to measure ourselves against year on year. And because we’re 80% employee-owned, it’s part of what makes Hiyield so brilliant because our team lives and breathes these standards. 

If an agency mentions sustainability but can’t point to anything external that verifies it, that’s worth questioning. 

Don’t forget accessibility

A website that not everyone can use isn’t a sustainable product, however green the hosting.

Accessibility and sustainability pull in the same direction more than most people realise. Clean, well-structured code benefits your carbon footprint and your users simultaneously. Faster load times help people on slower connections. Logical navigation helps screen reader users. Readable contrast helps people with visual impairments.

They might seem like separate checklists, but they’re the same underlying discipline of building thoughtfully. A sustainable agency should be building accessibility by default, not offering it as an optional extra.

Who do they work with

A sustainable agency should be selective about its clients, not in a precious way, but because it matters where expertise goes.

We work with a lot of purpose-driven organisations. Charities, social enterprises, and founders building products that solve real problems. We partner with Plant One CIC as part of our own climate commitments. We measure our environmental impact and set targets.

While we’re on the subject of dirty secrets… We signed the Clean Creatives pledge, which means we’re committed to not working with fossil fuel companies or their PR and marketing agencies. We will proactively turn down work in any of these sectors because we think it matters greatly when running a business with integrity and the planet in mind. 

When you partner with an agency whose values align with yours, the work is always better. 

No one’s squeaky clean

No agency gets this perfectly right. Sustainability is a direction and an ongoing journey, and the ones worth working with will tell you that openly and transparently.

What you’re looking for isn’t perfection. You’re looking for evidence that it’s genuinely woven into how they operate. That’s in everything from the code to the contracts, the banking to the certifications they’ve acquired, and most importantly, the clients they say yes and no to.

The internet has a carbon problem. The best digital agencies are paying attention to their part in it, being honest about where they are, and getting on with doing something about it.

If that sounds like the kind of studio you want on your side, we’d love to hear from you.