Top 5 Technical SEO Tools an SEO Can't Live Without

Technical SEO tools do a fairly unglamorous job: crawl every page, flag what's broken, and show you what search engines actually see when they visit your site. After years of running technical audits for brands and smaller businesses alike, these are the five tools we reach for most often, what each one is good at, and roughly what they cost.

1. Google Search Console

This free tool from Google is the starting point for any audit. It shows you which pages are indexed and flags what's stopping the rest from being crawled. You get search performance data (queries, impressions, clicks, average position), a place to submit your sitemap, a mobile-friendliness check, and extras like robots.txt reporting, crawl stats, and Core Web Vitals data.

Price: Free

2. Screaming Frog SEO Spider

Screaming Frog is probably the most widely used desktop crawler out there, and for good reason - it lets you audit a website's technical health quickly. We've used it since we started the agency, and our clients' sites have benefited from it just as much as we have. The team behind it keeps adding useful features, including AI and Python scripting options recently, which cut down the manual work considerably.

It catches most of what tends to go wrong on a site, including broken links, duplicate content, canonical issues, metadata problems, and XML sitemap errors.

Price: around £199 a year for up to four licenses.

3. Ahrefs

Ahrefs started as a backlink checker and has grown into something much broader. The higher tiers get expensive if you want access to every feature, but even the cheapest plan gives you solid data to work with, including keyword research, competitor analysis, content ideas, and technical SEO audits.

Price: from around £99 a month.

4. SEMrush

SEMrush covers similar ground to Ahrefs - keyword research, competitor analysis, technical SEO - and has the same trade-off: the features that make it genuinely useful sit behind the pricier plans. It's good for tracking organic and paid search performance side by side, spotting backlink opportunities, and analysing traffic.

Price: from around $139.95 a month.

5. Sitebulb

Sitebulb is a solid crawler that costs a fraction of what the bigger platforms charge. It picks up broken links, duplicate content, canonical issues, metadata problems, XML sitemap errors, and JavaScript rendering issues - the last one matters more each year as more sites lean on client-side rendering.

Price: around £10 plus VAT a month.

There's no single "best" tool

These five cover most of what we need, but they're not the only options out there, and none of them is objectively "the best." It comes down to your budget and what you're actually trying to find. If your site is slow, if pages are dropping out of Google's index, or if you just don't know why traffic has stalled, that's exactly what a technical audit is for.