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For Agencies & Freelancers

Making you more revenue whilst building stronger client relationships

Stop waiting for a client email to find out something has gone wrong. SiteVitals gives you a real-time view across your entire portfolio so you can be their proactive technical partner.

From a team trusted by

NHS
BBC Two
Aardman
National Charities
Award-Winning Agencies

A Tool That Pays For Itself

It doesn't just protect your clients. It gives you something to talk about every month.

This is the bit we didn't see coming when we started building SiteVitals - it is not just a monitoring tool. It is a recurring pipeline for work. Because websites are never finished. They always have something that could be better - and SiteVitals surfaces it, continuously, automatically.

Instead of waiting for a client to notice a problem and call you, you get to be the one who spots it first. That is a very different conversation to have.

01 — Performance £££

Performance dips become optimisation conversations

Core Web Vitals slip after a content update. Page load times creep up. SiteVitals flags it - and you have a genuine, data-backed reason to go back to your client with a proposal.

02 — Renewals £££

SSL and domain alerts become renewal conversations

A nearly-lapsed SSL or an approaching domain renewal is not a crisis - it is a prompt. You reach out proactively, client feels looked after, job gets done. Everyone wins

03 — SEO £££

SEO health checks become ongoing retainer work

Technical SEO is not a one-time job. SiteVitals continuously monitors the fundamentals - and with AI search changing the landscape, being technically sound is more important than ever. That is a retainer waiting to happen.

04 — Third-party code £££

Third-party script failures become dependency audits

When an external font, analytics tool or widget breaks, it can make a site look completely broken - even when the client’s own code is fine. Catching these opens up a wider conversation about dependencies, resilience, and site architecture.

05 — Downtime alerts £££

Downtime alerts become hosting conversations

Recurring uptime alerts on a client’s site are often a sign of a hosting problem. SiteVitals gives you the data to have that conversation confidently and back it up.

06 — Change Intelligence £££

Change Intelligence becomes a monthly check-in

SiteVitals lets clients (or you) log site changes - new plugins, updated content, image swaps - and overlays them against performance data. It makes monthly reporting straightforward, and gives you a clear story to tell.

Who built SiteVitals?

SiteVitals is run by 18a, a web development agency who for the last two decades have been the outsourced technical team that bigger agencies come to when they need technical back up. Back when “digital” was a new frontier, we helped studios and creative agencies build their digital departments, take on web clients, and deliver projects they could not have done alone.

We know what it feels like to be responsible for a client’s website when something goes wrong at 5pm on a Friday. We know the particular stress of being the person who has to call a client to say their site is down - and we know there is almost nothing worse than finding out from the client themselves.

Starting out over 25 years ago meant learning the whole web - not just one corner of it. DNS, hosting, domains, performance, security, front end, back end: all of it. That breadth is rare now, and it is baked into everything SiteVitals checks. The problems that fall between the cracks of modern specialisations are often the ones that cause the most damage to client relationships. SiteVitals catches them.

What SiteVitals Does

Everything a watchful developer keeps an eye on.

SiteVitals is the always-on technical oversight your web portfolio deserves. It's mix of language and explanations makes it perfect for the senior developer who can't watch everything at once and the non-techy agency account manager.

What does SiteVitals monitor?

Uptime & Availability

Two Ways to Work With SiteVitals

Run it yourself, or let your clients in.

There is no one right way to use SiteVitals as an agency or freelancer. Some people want full control. Others prefer to hand the tool to clients and stay in the loop. Both work - and both can work at the same time.

You manage it for your clients

Add all your client sites to one SiteVitals account. Monitor everything from a single dashboard. Share reports or give clients read access so they can see what you see, without you having to translate it every month.

✔ One account, unlimited client sites
✔ Portfolio-wide dashboard view
✔ Share reports directly with clients
✔ Give clients view access to their own site data
✔ You stay in control of the monitoring

Great for: Retainer clients, ongoing support agreements, anyone who wants monitoring to be part of their service offering.

Affiliate option

Your clients manage their own accounts

Prefer to let clients handle their own SiteVitals subscription? Our affiliate programme means you earn a commission when a client signs up through your link - and you can still stay in the loop.

✔ Client creates and manages their own account
✔ You earn affiliate commission on their subscription
✔ Client can share dashboard access with you at any time
✔ You stay informed without carrying the subscription cost
✔ Works well alongside other tools clients already manage

Great for: Clients who want ownership of their own data, one-off projects, or anywhere you want to add value without adding cost to your own account.

Find out more about the affiliate programme →

A note on account sharing: Whichever approach you take, SiteVitals makes it easy to share access. If you manage client accounts yourself, you can give clients view access to their own site data. If your client runs their own account through our affiliate programme, they can share access with you so you always have the context you need. No duplicate work, no awkward handovers - just the right people seeing the right information.

Beyond your own sites

Know when the market is moving,
not just when your client's site is.

One of the subtler advantages of continuous change monitoring is that it works on any public URL - including your clients' competitors. When a rival brand quietly repositions their homepage, shifts their service copy, or starts targeting a different set of keywords, you'll see it. Not because you were watching, but because SiteVitals was.

Being the agency that notices a competitor has pivoted before your client does is a very different conversation than the one where you're catching up.

This isn't surveillance - it's market awareness. Every page you're tracking is publicly accessible. SiteVitals simply means you don't have to visit them manually to know something has changed. Add a competitor's homepage alongside your client's, and the same monitoring that protects your client's site starts informing their strategy.

Accessible pricing

SiteVitals is independent, built without big overheads, and priced so every business can afford professional-grade monitoring.

Best Value for Agencies

£79 /month

+ VAT

When paid annually

No per-seat fees

Shareable client reports

🔗

Interested in the affiliate programme?

If you would rather recommend SiteVitals to your clients than run it yourself, our affiliate programme pays you a commission on every subscription that comes through your link. Your clients manage their own account, choose their own plan, and can share access with you whenever they need to. It is a genuinely low-effort way to add value for clients and earn a little something in the process.

Find out more about the affiliate programme →

One Dashboard.
Every Client Portfolio.

Stop waiting for client emails to find out a site is down. Monitor site health and performance across your entire agency from one real-time view.

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Questions

Things people often ask us.

If something isn't covered here, we're genuinely happy to answer it. We're a real team and we actually respond.

How does SiteVitals help me manage multiple client portfolios?

Instead of checking sites individually, our Agency Dashboard aggregates uptime, SEO, and performance data for every client into a single real-time view, allowing you to spot issues across your entire portfolio in seconds.

Can I use SiteVitals as a value-add for my maintenance packages?

Absolutely. By providing proactive monitoring, you can fix client issues before they even notice them. It turns "I think the site is fine" into "I have the data to prove your site is performing at 100%."

Will monitoring slow down my clients’ websites?

No. SiteVitals uses non-intrusive, lightweight pings and API-based checks (like Google PageSpeed) that do not impact the front-end user experience or server load for your clients.

How can I prove to clients that their site is healthy?

SiteVitals tracks historical performance and uptime. You can use these metrics during monthly check-ins to demonstrate the ongoing value of your maintenance and hosting services.

What happens when a client’s site goes down?

You get an immediate alert via your preferred channel. This allows your team to investigate and resolve the issue-often before the client is even aware there was a problem.

Does it work with different platforms like WordPress, Webflow, or Shopify?

Yes. Since SiteVitals monitors from the "outside-in," it works perfectly with any CMS or platform. You can monitor a diverse portfolio of client sites all from the same dashboard.