The internet runs on electricity, and most of that electricity still comes from fossil fuels. According to the International Energy Agency (IEA), data centres consumed approximately 1.5% of global electricity in 2024 — around 415 TWh — and that figure is expected to more than double by 2030, driven largely by AI workloads. In the United States alone, data centres already account for over 4% of national electricity use, projected to reach 6% by 2026.
These aren't abstract numbers. Every deployment, every CI/CD pipeline run, every staging environment left running overnight adds to the total. The question isn't whether the web has a carbon footprint — it's whether we're making deliberate choices to reduce it.
What Green Hosting
Actually Means
The term gets thrown around loosely, so let's be specific. Green hosting means your infrastructure provider powers its data centres with verified renewable energy — not just purchasing carbon offsets after the fact. There's a meaningful difference between a provider that runs on solar and wind power versus one that burns coal and then buys credits to neutralise
it.
The Green Web Foundation maintains an open dataset tracking which hosting providers have been independently verified as running on renewable energy. Their Green Web Check tool lets you verify any website — and yes, DeployHQ passes.
DeployHQ's Green Infrastructure
DeployHQ is built on Krystal, a UK-based hosting provider that takes sustainability seriously — not as a marketing exercise, but as a core business commitment backed by third-party certifications.
Here's what makes Krystal's infrastructure genuinely green:
Renewable Energy (Not Offsets)
Krystal's data centres run on 100% renewable energy from solar, wind, and tidal sources. This isn't offset-based accounting — the electricity powering the servers comes directly from renewable generation.
Industry-Leading Efficiency
Power Usage Effectiveness (PUE) measures how efficiently a data centre uses energy. A PUE of 1.0 would mean every watt goes to computing; the global average sits around 1.58. Krystal's facilities operate at:
- Netwise East (UK): PUE of 1.10 — only 5% overhead for cooling and infrastructure
- Iron Mountain (US & Amsterdam): PUE of 1.2
For context, even Google's highly optimised data centres average a PUE of 1.10. Krystal is operating at the same tier of efficiency.
Verified Commitments
Unlike vague sustainability promises, Krystal holds concrete certifications:
- B Corp certified — meeting rigorous standards for social and environmental performance
- 1% for the Planet member — donating 1% of revenue to environmental causes
- SME Climate Hub — committed to halving emissions by 2030 and net-zero by 2050
- Over 4 million trees planted through partnerships with Veritree, Ecologi, and Trees for Life — with a pledge to reach one billion trees by 2030 via 1t.org
They even offset the lifetime carbon footprint of every new employee retroactively.
If your organisation holds a B Corp certification or is verified by the Green Web Foundation, you may qualify for our Green Deployment Discount — 20% off any DeployHQ plan.
How Deployment Practices Affect Carbon Footprint
Green hosting is the foundation, but how you deploy matters too. Inefficient deployment workflows waste compute cycles, which means more electricity consumed, which means more carbon — even on green infrastructure.
Here's where deliberate engineering choices make a difference:
Atomic Deployments Eliminate Waste
A zero-downtime deployment using atomic swaps means your new code is prepared in a separate directory and switched live in a single operation. There's no period where servers are restarting, re-warming caches, or running partial code. Compare that to a naive deployment that restarts application servers, triggers cache rebuilds, and potentially runs duplicate processes during the transition — all of which burn extra CPU cycles for no user benefit.
DeployHQ's zero-downtime deployment guide walks through how to set this up.
Turbo Deployments Transfer Less Data
DeployHQ's Turbo Deployments only transfer files that have actually changed, rather than uploading your entire codebase on every deploy. On a large project, this can reduce transfer volumes by 90% or more — directly cutting the network and I/O energy cost of each deployment.
Build Pipelines Run Once, Not Everywhere
A proper CI/CD pipeline compiles, tests, and packages your code once, then distributes the built artefact to each server. Without a pipeline, you're running npm install && npm run build on every server individually — multiplying the compute cost by the number of servers in your cluster.
DeployHQ's build pipeline feature handles this automatically.
Right-Size Your Infrastructure
Over-provisioned servers waste electricity 24/7. A VPS that's correctly sized for your workload — rather than a server with 32GB of RAM running a WordPress site — can reduce energy consumption significantly. If you're weighing options, our shared hosting vs VPS comparison covers the trade-offs, including resource efficiency.
For containerised workloads, Docker enables higher density per server, meaning fewer physical machines needed for the same workload.
Measuring Your Web Carbon Footprint
You can't improve what you can't measure. The Green Web Foundation provides open-source tools for exactly this:
- Green Web Check — verify whether any website is hosted on green energy
- CO2.js — a JavaScript library that estimates the carbon emissions of data transfer, so you can build carbon awareness directly into your applications and monitoring
These aren't theoretical exercises. Integrating CO2.js into your deployment monitoring gives you real data on the carbon cost of each release — which pages are heaviest, which assets could be optimised, and whether your overall footprint is trending up or down.
The Bigger Picture
Choosing green infrastructure isn't a silver bullet. The IEA projects data centre electricity demand will reach 945 TWh by 2030 — more than double current levels. AI workloads are the primary driver, but every website and application contributes to the total.
What developers and teams can control is their slice of that footprint:
- Host on verified green infrastructure — not self-reported, but independently verified through organisations like the Green Web Foundation
- Deploy efficiently — atomic deployments, differential file transfers, centralised builds
- Right-size servers — match resources to actual workload, not worst-case projections
- Measure and monitor — use tools like CO2.js to track your carbon footprint alongside your performance metrics
- Choose providers with real commitments — B Corp certification, 1% for the Planet membership, and published PUE ratings are signals that sustainability is structural, not performative
DeployHQ is built on this foundation. Every deployment you run through our platform is powered by Krystal's renewable energy infrastructure, transferred efficiently through Turbo Deployments, and designed to minimise wasted compute cycles.
Ready to deploy on green infrastructure? Sign up for DeployHQ and start building on a platform that takes sustainability as seriously as uptime. If your organisation is B Corp certified or Green Web Foundation verified, check out our Green Deployment Discount for 20% off any plan.
Have questions about green deployments or sustainability practices? Reach out at support@deployhq.com or find us on Twitter/X.