8 Best Technical SEO Agencies in 2026, Ranked and Priced

Most sites lose traffic to problems nobody sees: pages Google cannot crawl, slow templates and broken migrations. The best technical SEO agencies in 2026 are Loopex Digital, Omnius and SmartSites, because each shows what it fixes and the results it got.

We compared technical SEO agencies on their named deliverables: audits, crawl and index control, Core Web Vitals, JavaScript rendering and migrations. Every price and result below comes from the agency's own pages or its Clutch profile.

The ranking at a glance

The table compares all eight agencies on pricing model, entry cost and minimum term. Clutch figures were checked on 2026-10-06.

"Not published" means the agency does not disclose that figure.

How we ranked these agencies

We screened 40+ agencies that sell technical SEO. To make the shortlist, an agency needed a dedicated technical SEO page with named deliverables. It also needed a technical case study or a Clutch rating of 4.5 or higher.

Two agencies, Salt Agency and iPullRank, have no Clutch reviews. They stay on the list because their technical case studies are detailed and dated. The missing reviews cost them points.

• Service depth and deliverables 25% · crawl, indexation, rendering, Core Web Vitals, migrations, implementation
• Independent reviews 20% · Clutch rating weighted by review volume
• Pricing transparency 20% · a published retainer or audit price
• Proof 15% · technical case studies with numbers, units and dates
• AI search 10% · technical readiness for AI crawlers, measured
• Terms 10% · minimum term published, month to month preferred

Total: 100%

Loopex Digital is an SEO and AI search agency whose technical team audits a site and then implements the fixes. Work covers crawl and index control, site speed, structured data and site migrations. Its migration for a Latin American telecom company grew monthly organic visits from 97,000 to 129,000.

Loopex Digital checks that AI crawlers can read a site and reports citation share across ChatGPT, Perplexity and Google AI Overviews. Its Bed Kingdom work on Magento grew organic traffic from 44,000 to 138,000. Retainers start at $1,500 per month, month to month. It holds a 5.0 Clutch rating across 97 reviews.

Omnius is a London SEO and AI search agency that works only with B2B SaaS, fintech and AI companies. It also has offices in Dubai and Belgrade. Its technical SEO work covers crawl and index fixes, page speed, canonical tags, structured data, redirects, migrations, XML sitemaps and an LLMs.txt file. It also sets up tracking in GA4, Google Search Console and Looker Studio.

For AuthoredUp, a LinkedIn content SaaS, Omnius rebuilt the site on Webflow and mapped old URLs to new ones with wildcard redirects. Daily organic clicks grew from about 400 to 1,600+ after the February 2024 launch. Conversions rose 64%, and the site logged 2,600+ signups in about 3.5 months. Omnius tracks AI search visibility in Atomic AGI, an analytics tool it built in house.

SmartSites is a digital marketing agency in Paramus, New Jersey, with a 4.9 Clutch rating across 368 reviews, the most on this list. Its technical SEO audit covers a full crawl, indexing, sitemaps, Core Web Vitals, structured data and backlink health. It says the first crawl and priority fixes happen within the first weeks.

SmartSites prices technical SEO from $2,600 per month, which buys 40 hours at $65 per hour, setup included. It reports AI assistant visits as their own channel in its client hub. It says those visitors converted at 6.5% against 3.6% for organic, across 600 client sites. It fits small and mid-size businesses.

Pearl Lemon is a London SEO agency that publishes a technical SEO price: from £3,000 per month with a 3-month minimum. Its deliverables cover crawl budget, indexation, JavaScript rendering, Core Web Vitals, hreflang and platform migrations. It reports a 61% increase in valid indexed pages for an international SaaS client.

Pearl Lemon also sells an AI engine visibility service for ChatGPT, Gemini, Perplexity and Claude, tracked with prompt testing. It says first visibility arrives in 30 days and full results in 60 to 90 days. It holds a 4.8 Clutch rating across 73 reviews. It fits international sites with hreflang and indexing problems.

Salt Agency is a UK technical SEO agency in Leeds that runs a 300-point technical audit framework. Its work covers JavaScript rendering, site architecture, log file analysis, Core Web Vitals and headless sites. It says it has run hundreds of SEO migrations. After Bikmo merged four country sites into one domain, organic traffic rose 100%.

Salt Agency measures AI search through LLM visibility, AI referral traffic in GA4 and repeated prompt audits. It has no Clutch reviews yet, and its Clutch profile lists a $10,000+ minimum project. It does not publish a price. It fits mid-size and large sites facing a migration or a JavaScript rebuild.

iPullRank is a New York SEO agency known for enterprise technical audits and its founder's research on how search engines work. Its technical page covers site audits, page speed, technical specifications and backlink audits. For an automotive publisher, it grew search traffic 130% and added 13M+ visits over 2 years.

iPullRank sells a GEO service that tracks citation frequency, AI referral traffic and fan-out coverage. It has no Clutch reviews, and its Clutch profile lists a $50,000+ minimum project. It does not publish a price. It fits enterprise publishers and large brands with in-house developers.

Straight North is a Chicago digital marketing agency, founded in 1997, with a 4.7 Clutch rating across 142 reviews. It sells technical SEO inside a monthly SEO retainer rather than as a standalone audit. Clutch lists hourly rates of $100 to $149 and a team in the 50-249 band.

Straight North runs a GEO service for Google AI Overviews, ChatGPT and Gemini, tracked in its GoNorth! reporting. That reporting connects Google Analytics, Search Console, BrightEdge and CallRail, with conversions as the main metric. We could not verify a technical case study on its site. It fits B2B firms that judge SEO by leads.

Markitors is a small business SEO agency in Scottsdale, Arizona, with a 4.9 Clutch rating across 27 reviews. Its technical service covers XML sitemaps, robots.txt, 301 redirects, canonical URLs, schema markup and tracking setup. It reports that Threads Software's domain rating rose from 2 to 53 in 2 years.

Markitors says on its technical page that it analyzes but does not implement JavaScript changes, migrations or mobile fixes. We found no AI search service on its site. It does not publish a price. It fits small businesses that need technical basics set up correctly and have a developer for larger changes.

How these agencies handle AI search

Technical SEO now includes making a site readable for AI crawlers and answer engines. Seven of the eight agencies sell AI search work, and six say how they measure it.

Loopex Digital reports citation share. Omnius tracks AI visibility in its own tool, Atomic AGI. Salt Agency uses LLM visibility, GA4 AI referral traffic and prompt audits. iPullRank tracks citation frequency, and SmartSites and Straight North report AI traffic as its own channel. Markitors has no AI service.

See our AI SEO page for what AI search work covers.

The 5-Prompt AI Visibility Test

Before you hire, check where your site stands in AI answers. Run these in ChatGPT, Perplexity and a Google search that shows an AI Overview:

1. “Best [your product] for [use case]”
2. “[Your brand] alternatives”
3. “[Your brand] vs [top competitor]”
4. “Is [your brand] good for [need]?”
5. “How much does [your product] cost?”

How to evaluate a technical SEO agency

A good technical agency explains the problem, fixes it and proves the change. Check these six points before you sign.

1. Ask for a sample audit and check that each issue has a priority and an owner.
2. Ask whether the agency implements fixes or hands them to your developers.
3. Ask about JavaScript rendering, log files and migrations if your site needs them.
4. Ask for a dated technical case study with crawl, index or speed numbers.
5. Ask how they check AI crawler access, such as robots.txt rules for AI bots.
6. Confirm the price, the term and what happens after the audit.

Red flags when choosing

• An audit that is a tool export with 300 issues and no priorities.
• No plan for who implements the fixes.
• Speed scores reported without real user data from Core Web Vitals.
• Migrations run without a redirect map and a test crawl.
• No dated case study with crawl, index or traffic numbers.

Which technical SEO agency fits your site

Match the agency to your site size and the help you need. Use this table to build a shortlist of two or three.

What technical SEO agencies cost in 2026

Three agencies on this list publish a technical SEO price. They range from $1,500 per month at Loopex Digital to about £3,000 per month at Pearl Lemon. Two more list project minimums on Clutch.

A one-off audit costs less than a retainer, but fixes still need someone to build them. For what each tier buys, see our SEO pricing guide.

FAQ

What does a technical SEO agency do?

A technical SEO agency makes sure search engines and AI crawlers can find, render and index your pages. It audits crawl and index issues, site speed, Core Web Vitals, structured data, redirects and migrations. The better agencies then implement the fixes and measure the change in indexed pages and traffic.

How much do technical SEO agencies cost?

On this list, technical SEO starts at $1,500 per month at Loopex Digital, $2,600 per month at SmartSites and £3,000 per month at Pearl Lemon. Enterprise firms list project minimums on Clutch of $10,000+ at Salt Agency and $50,000+ at iPullRank. Price depends on site size and whether fixes are included.

How long does a technical SEO audit take?

A focused audit of a small site usually takes one to two weeks. Large sites with millions of URLs, JavaScript rendering or log file analysis can take four to eight weeks. SmartSites says its first crawl and priority fixes happen within the first weeks of a retainer.

Do I need a technical SEO agency or a developer?

You usually need both. The agency finds and prioritises the issues and writes the specification. A developer, in house or at the agency, builds the fix. Ask every agency who implements the work, because some only deliver an audit document.

Does technical SEO affect AI search visibility?

Yes. AI assistants can only cite pages their crawlers can reach and read. Blocked AI bots in robots.txt, JavaScript-only content and slow pages all reduce your chances of being cited. Ask an agency how it checks AI crawler access and how it measures citations.

When should I hire a technical SEO agency?

Hire one before a site migration, a redesign or a platform change. Also hire one when traffic drops after an update, when pages stop being indexed or when Core Web Vitals fail. Fixing problems before launch costs far less than recovering lost traffic later.