Our pick: Krystal · 8.1/10 in this guide
Check Krystal price£8.40/mo inc VAT · £302 over 3 years. Affiliate link: we may earn a commission, which never changes a score. Why this pick?
Which UK host is best for UK sites that want hosting run on renewable energy, with the claim checked rather than taken on trust? We rank 7 hosts with a published score built from prices (inc VAT) and features verified on each provider's own site. Commission is never an input.
Best for eco / green
8.1/10 in this guide
Krystal has the highest score in this guide. £8.40/mo, and the same price at renewal inc VAT. 10 GB NVMe, 1 site. About £302 over 3 years.
Advertised by the host as £7/mo (ex VAT).
Affiliate link: we may earn a commission, which never changes a score. Disclosure Krystal review
Also worth a look
Why scores differ from the homepage. Every guide uses the same six score components but weights them for the job. This one counts guide features (45%) and renewal price (15%) most; the homepage's all-round score gives renewal price the biggest share. So Krystal scores 8.1 here and 6.5 overall (#5 on the homepage, where WebHosting UK is #1). See this guide's weights · Methodology
Lowest 3-year cost is not the same as the top score. Hostinger has the lowest 3-year total in this guide (£86 inc VAT, against £302 for Krystal) but scores 5.8/10 here, because the guide score weighs more than the 3-year total. Check the terms on its plan before you buy: some of the lowest prices need a long term paid upfront.
| # | Host & plan | Intro /mo | Renews /mo | 3-yr cost | Storage / sites | UK data centre | Score | Visit |
|---|---|---|---|---|---|---|---|---|
| 1 | Our pick KrystalAmethyst | £8.40£7/mo | £8.40£7/mo | £302 | 10 GB NVMe · 1 site | UK data centre | 8.1/10 | See Krystal plans |
| 2 | 20iStartup | £12.00£10/mo | £12.00£10/mo | £421 | 10 GB · 1 site | UK data centre | 8.0/10 | See 20i plans |
| 3 | IONOSStandard | £3.60£3/mo for 6mo | £7.20£6/mo | £238 | 100 GB NVMe · Unlimited sites | No UK data centre verified | 7.8/10 | See IONOS plans |
| 4 | WebHosting UKStarter | £3.95£3.29/mo | £3.95£3.29/mo | £142 | 10 GB SSD · 2 sites | UK data centre | 7.3/10 | See WebHosting UK plans |
| 5 | FasthostsStart | £1.20£1/mo for 3mo | £6.90£5.75/mo | £231 | 100 GB SSD · 1 site | UK data centre | 6.4/10 | See Fasthosts plans |
| 6 | HostingerSingle | £1.79£1.49/mo | £9.59£7.99/mo | £86 | 10 GB SSD · 1 site | UK data centre | 5.8/10 | See Hostinger plans |
| 7 | Heart InternetPlus | £3.60£3.00/mo | £7.19£5.99/mo | £216 | 25 GB NVMe · 1 site | UK data centre | 5.7/10 | See Heart Internet plans |
Small print under each price is exactly as the provider advertises it. Buttons are affiliate links (disclosure). Converted figures add VAT at 20% where prices are quoted ex VAT (or the basis isn't stated). 3-yr cost = intro price for the promo period then renewal.
Each component is scored 0–10 and weighted as shown. Commission is never an input. Full methodology.
| Host | Renewal price (inc VAT) 15% | Intro price (inc VAT) 5% | Trustpilot 15% | Support 10% | Guide features 45% | UK data centre 10% | Total |
|---|---|---|---|---|---|---|---|
| Krystal | 4.7 | 1.4 | 9.5 | 4.0 | 10.0 | 10.0 | 8.1 |
| 20i | 3.3 | 1.0 | 9.0 | 6.0 | 10.0 | 10.0 | 8.0 |
| IONOS | 5.5 | 3.3 | 8.5 | 10.0 | 10.0 | 0.0 | 7.8 |
| WebHosting UK | 10.0 | 3.0 | 9.5 | 10.0 | 5.0 | 10.0 | 7.3 |
| Fasthosts | 5.7 | 10.0 | 9.0 | 4.0 | 5.0 | 10.0 | 6.4 |
| Hostinger | 4.1 | 6.7 | 8.0 | 4.0 | 5.0 | 10.0 | 5.8 |
| Heart Internet | 5.5 | 3.3 | 8.5 | 2.0 | 5.0 | 10.0 | 5.7 |
Guide features: Renewable energy. Only features verified on the provider's own site count.
Green web hosting (also called eco or sustainable hosting) means the electricity your website's servers and data centre use is renewable, or is matched with an equivalent amount of renewable generation. Every website runs on servers drawing power 24/7, so where that power comes from is the biggest environmental difference between hosts.
On 2026-11-01 we ran the Green Web Foundation check against every host we track and read each provider's own sustainability claims. Of the 7 hosts in this guide, Krystal, 20i, IONOS are listed by the Green Web Foundation; the rest make self-declared claims only.
| Host | Domain checked | Result | Listed under | What it means |
|---|---|---|---|---|
| 123 Reg | 123-reg.co.uk | ✗ Not found | – | Not found in the Green Web Foundation dataset. Raw result |
| 20i | 20i.com | ✓ Green | 20i | Listed under 20i's own name in the Green Web Foundation directory. Raw result |
| eukhost | eukhost.com | ✓ Green | Cloudflare | Website passes via Cloudflare (CDN), not a listing for eukhost's own data centres. Raw result |
| Fasthosts | fasthosts.co.uk | ✓ Green | IONOS SE | Passes via IONOS SE (Fasthosts' parent group), not a Fasthosts listing of its own. Raw result |
| GoDaddy | godaddy.com | ✗ Not found | – | Not found in the Green Web Foundation dataset. Raw result |
| Heart Internet | www.heartinternet.uk | ✓ Green | Cloudflare | Passes only because the website sits behind Cloudflare's CDN; this does not tell you about customer hosting servers. Raw result |
| Hostinger | hostinger.co.uk | ✓ Green | Cloudflare | Passes only because the marketing site sits behind Cloudflare's CDN; this does not tell you about customer hosting servers. Raw result |
| IONOS | ionos.co.uk | ✓ Green | IONOS SE | Listed under IONOS SE, with its 2025 sustainability report as supporting evidence. Raw result |
| Krystal | krystal.io | ✓ Green | Krystal | Listed under Krystal's own name in the Green Web Foundation directory. Raw result |
| SiteGround | siteground.co.uk | ✓ Green | Google Cloud | Passes via Google Cloud, the infrastructure the site runs on. Raw result |
| WebHosting UK | webhosting.uk.com | ✓ Green | Cloudflare | Passes only because the marketing site sits behind Cloudflare's CDN; this does not tell you about customer hosting servers. Raw result |
Checked 2026-11-01 via the Green Web Foundation's public greencheck API. A pass only shows the checked domain is served from infrastructure listed as green. If a site sits behind a CDN like Cloudflare, the check sees the CDN, not the host's customer servers, so we don't count those as evidence.
| Host | Our rating | How energy is sourced | PUE published | Evidence |
|---|---|---|---|---|
| Krystal | Independently listed | Renewable matching + PPAs | 1.17 | Power matched 100% with renewable energy (Krystal's own wording: matched, not directly powered). Flagship Netwise East data centre PUE 1.17 (2024/25, UK Climate Change Agreement); Telehouse North on a direct PPA with the London Array offshore wind farm. Verified green host with the Green Web Foundation; certified B Corp. Source |
| 20i | Independently listed | Renewable supply / cloud partners | 1.2 | States all web hosting runs on 100% renewable power via renewable suppliers and cloud partners; own data centres PUE 1.2. Listed under its own name by the Green Web Foundation. Source |
| IONOS | Independently listed | Green electricity supply | Not published | Data centres "powered by 100% green energy" (IONOS web hosting page). IONOS SE is listed by the Green Web Foundation with its 2025 sustainability report. Source |
| WebHosting UK | Self-declared | REGO certificates | Not published | Self-declared: buys REGO certificates for its green energy; ISO 14001 and ISO 50001; net-zero goal. No Green Web Foundation listing (its site only passes via Cloudflare). Source |
| Fasthosts | Self-declared | Renewable supply + on-site solar | 1.3 or less | Self-declared: UK data centres on 100% renewable electricity (offshore wind and biofuel), HVO generators, ISO 50001, PUE 1.3 or less, 524 kWp solar roof at Worcester. Its domain passes the Green Web Foundation check via parent IONOS SE, but there's no Fasthosts listing of its own. Source |
| Hostinger | Self-declared | PPAs + certificates | Not published | Self-declared: data-centre electricity matched with renewables via supply contracts/PPAs and certificates (GOs, RECs, I-RECs). No Green Web Foundation listing of its own (its site passes via Cloudflare). Source |
| Heart Internet | Self-declared | – | Not published | Self-declared: "All our hosting packages are powered by 100% Renewable Energy". Its website passes the Green Web Foundation check only via Cloudflare, which doesn't cover the hosting servers. Source |
Hosts we track with no renewable claim on the pages we checked: 123 Reg, eukhost, GoDaddy, SiteGround. That doesn't prove they use fossil power, only that they don't publish a claim we could cite.
Our eco score gives 45% to the renewable-energy rating: independently listed = 10, self-declared = 5, no claim = 0. The rest is renewal price (15%), Trustpilot (15%), support (10%), UK data centre (10%) and intro price (5%). Krystal scores highest at 8.1/10, with 20i close behind at 8.0. We don't run our own energy measurements; everything above links to the provider's page or the Green Web Foundation result.
Related: cheap web hosting UK (if price matters more than energy source) · small business hosting · Krystal vs WebHosting UK · green hosting glossary.
UK-based, renewable-powered host with flat pricing (no renewal jump)
Scored plan: Amethyst, 10 GB NVMe, 1 site. Monthly. Trustpilot 4.9/5. Verified 2026-11-01.
UK reseller specialist with autoscaling cloud hosting and London data centre
Scored plan: Startup, 10 GB, 1 site. Monthly, no contract (first month £1). Trustpilot 4.8/5. Verified 2026-11-01.
Rock-bottom entry prices with big storage allowances
Scored plan: Standard, 100 GB NVMe, Unlimited sites. Monthly after promo. Trustpilot 4.7/5. Verified 2026-11-01.
Leeds-based host with transparent pricing and 24/7 UK support
Scored plan: Starter, 10 GB SSD, 2 sites. Monthly. Trustpilot 4.9/5. Verified 2026-11-01.
British brand, UK data centres, strong small-business hosting
Scored plan: Start, 100 GB SSD, 1 site. Monthly after promo. Trustpilot 4.8/5. Verified 2026-11-01.
Cheapest multi-year intro prices, with a selectable UK server location
Scored plan: Single, 10 GB SSD, 1 site. 48 months. Trustpilot 4.6/5. Verified 2026-11-01.
Long-running UK host with cPanel plans on UK data centres, bundled mailboxes and a free .uk domain for year one
Scored plan: Plus, 25 GB NVMe, 1 site. 12 months paid yearly (50% off first year; renews £71.88/yr). Trustpilot 4.7/5. Verified 2026-11-01.