Here are the Top 7 Technical SEO Agencies to Trust with Your Website's Health

Quick summary

This article highlights the top 7 technical SEO agencies to ensure website health and growth. It covers agencies like Embarque, NextLeft, and Loopex Digital, detailing services and results, including how to select the best one for your website. Learn how these agencies optimize technical SEO across platforms to boost traffic, rankings, and conversions.

Struggling to keep your website technically healthy and ranking?

Managing a website’s technical SEO can feel like navigating a maze. Broken links, slow page speeds, crawl errors, and indexing issues often hold back even the most carefully crafted content. 

Many businesses pour effort into content and marketing but overlook the backend issues that search engines care about most. Without proper technical SEO, your site might never reach its full traffic and conversion potential.

In this Embarque article, we’re going to review the top 7 technical SEO agencies you can trust to safeguard your website’s health, boost performance, and help you rank higher in search results.

But first…

Why listen to us?

At Embarque, we’ve helped over 27 SaaS, marketplace, and enterprise clients boost traffic, conversions, and search rankings through expert technical SEO. Our hands-on experience optimizing sites, fixing crawl issues, and scaling content strategies gives us a unique perspective, allowing us to confidently highlight the best agencies to ensure your website’s health and performance.

What is a technical SEO agency?

A technical SEO agency is a specialized firm that focuses on optimizing the backend and structural elements of a website to boost visibility and overall performance. Unlike traditional SEO agencies that focus primarily on content and link building, technical SEO ensures your site is crawlable, indexable, fast, secure, and properly structured.

These agencies collaborate closely with developers and content teams to implement best practices, helping your website be better understood, trusted, and ranked by search platforms.

Why hire a technical SEO agency?

Fix complex site issues

Many websites have hidden technical problems like crawl errors, slow page speeds, or broken links that hurt performance. A technical SEO agency identifies and resolves these issues to improve overall site health.

Optimize for growth 

Beyond fixing errors, a technical SEO agency implements strategies that scale traffic and conversions. At Embarque, we combine technical fixes with data-driven insights to ensure your website not only ranks but also drives measurable business results.

Stay ahead of algorithm changes 

Search platforms frequently update their ranking criteria. Technical SEO experts monitor these changes and adjust your site accordingly, keeping your website competitive and future-proof.

Our list of the 7 best technical SEO companies

Below is a summary of the agencies we’ll cover in this guide:

Embarque tops our list as a leading technical SEO agency, helping businesses unlock their website’s full potential. We focus on diagnosing and fixing complex SEO issues, optimizing site structure, and improving performance to drive more traffic, leads, and revenue.

Our team combines performance-driven strategies with hands-on expertise to deliver measurable results quickly and efficiently. We work closely with clients to provide clear roadmaps and ongoing support for sustainable growth.

Key services

• Technical SEO audits to identify and prioritize issues
• On-page optimization including meta tags, headers, and internal linking
• Site speed improvements for faster load times and better UX
• Structured data implementation to enhance search visibility
• Backlink analysis and toxic link removal
• Programmatic SEO for scalable, high-impact content strategies
• Core Web Vitals monitoring to improve performance and user experience

Results

• Reached 9.6M in yearly traffic under 12 months for a SaaS tool (Flick)
• 60x Organic Traffic to a Client’s Website Using Linkbuilding Techniques in a Year
• Helped Instatus Boost Traffic by 1,500% and MRR by 833%
• Took SignHouse from Zero to 60,000 Monthly Organic Visitors in Just 6 Months

WebFX focuses on increasing website traffic, improving Core Web Vitals, website security, mobile experience, and conversion rates. They use proprietary marketing software called RevenueCloudFX to provide clients with deep insights and ROI tracking, ensuring continuous optimization and long-term growth. The agency serves a wide range of industries with a holistic approach to technical SEO combined with conversion rate optimization.

Key services

• Technical SEO audits and site health monitoring
• Core Web Vitals and page speed optimization
• Mobile user experience enhancement
• Website security implementation (HTTPS and protocols)
• Conversion rate optimization (CRO)
• Competitor and content analysis with AI-driven insights
• SEO ROI tracking and reporting with proprietary software

Results

• 113% YTD SEO conversion increase for All Pro Trailer Superstore
• 125% increase in organic traffic for Ryan Amato Painting
• 198% increase in organic transactions for KOA
• 52% site traffic increase for Bar’s Leaks

NextLeft is a technical SEO agency specializing in local and enterprise campaigns with a strong emphasis on structured data, crawlability, and content targeting. They design SEO programs tailored to high-value sectors, including education, healthcare, and multi-location businesses. By combining detailed audits with conversion-based content strategies, NextLeft improves organic rankings while aligning with client lead-gen goals.

Key services

• Technical SEO audits and site optimization
• Enterprise SEO for large and complex websites
• Content marketing and SEO-friendly content creation
• Premium link building and backlink strategies
• Web development and design optimized for SEO
• Paid media management, including Google, Meta, and LinkedIn Ads
• Conversion rate optimization (CRO) for maximizing ROI

Results

• 1,100% Increase in Organic Traffic for Widen
• Generated $613K/month in traffic value for Paper Mart 
• 13,900 Keywords, $18,200/mo in SEO value for HFS Federal Credit Union
• 500%+ Increase, 14,700 Organic Keywords for Luna DNA

Victorious is a leading technical SEO agency based in San Francisco. They are known for their data-driven, results-oriented approach to boosting website visibility and search rankings. They focus on optimizing site structure, crawlability, indexability, and user experience to help brands outrank competitors and grow organic traffic. 

Key services

• Technical SEO audits and troubleshooting
• Website speed and mobile optimization
• Core Web Vitals compliance and enhancement
• Structured data and schema markup
• Competitor analysis and gap identification
• Onsite SEO and internal linking strategy
• Managed website maintenance and WordPress hosting

Results

• Achieved 85% more organic traffic for AmeriNote Exchange
• Drove 381% increase in blog traffic for CSA Transportation
• Increased page-one keywords by 117% for NAACP Legal Defense Fund
• Boosted organic traffic by 270% for Eden Health

Vixen Digital is a dynamic technical SEO agency specializing in driving brand visibility online through data-backed, technology-driven strategies. They emphasize actionable insights and measurable outcomes, avoiding generic approaches in favor of tailored, proactive solutions. Their expertise includes thorough technical SEO audits, backlink audits, and gap analysis.

Key services

• Technical SEO audits and site health analysis
• Backlink audits and link building
• Gap analysis for SEO opportunities
• Onsite SEO optimization
• SEO content creation
• PPC campaign management with test-and-learn approach
• Keyword research and competitive analysis

Results

• 120% Increase in organic traffic for Olic
• 360% increase in enquries for The Education Group (London)
• 918% increase in organic traffic for UWS (London)

Single Grain is a top-ranked technical SEO agency known for its comprehensive, results-driven SEO strategies that integrate deep technical expertise with conversion optimization, paid advertising, and creative services. They specialize in growth-stage B2B companies, SaaS, e-commerce, and fintech sectors, using AI-powered programmatic SEO to scale technical optimization across thousands of pages.

Key services

• AI-powered programmatic technical SEO optimization
• Comprehensive technical SEO audits and implementation
• Core Web Vitals and site speed optimization
• Structured data and schema markup integration
• Conversion rate optimization with rapid testing cycles
• Integrated content strategy aligned with SEO
• In-depth analytics and performance tracking 

Results

• WineDeals achieved a 268% increase in clicks in 3 months
• LS Building Products increased site conversions by 229% in 12 months
• Simon Pearce increased conversions by 25% month over month

Loopex Digital is a boutique SEO agency known for its strong focus on technical SEO combined with strategic content development and high-authority link building. They specialize in driving sustainable growth for startups, SaaS companies, e-commerce, and other sectors by focusing on revenue-driven SEO strategies, technical site optimizations, and transparent client collaboration.

Key services

• Technical SEO audits and site structure optimization
• AI-powered technical SEO and performance enhancements
• High-authority link building and digital PR
• SEO content strategy and creation aligned with user intent
• Keyword research targeting commercial and buyer intent
• SEO migrations with no ranking drops
• Local and international SEO strategies for multiple industries

Results

• 65% Boost in Organic Traffic for Paystub Hero
• 352% Boost in Organic Traffic for Soundsory
• 710% Growth in Monthly Organic Traffic for Wave Connect
• 100% Boost in Organic Traffic for Reimagine Psychiatry

How to choose the right technical SEO agency

Look for proven technical expertise

Choose an agency with a strong track record in addressing complex SEO issues like site speed optimization, crawl errors, and structured data implementation. At Embarque, we provide thorough site audits and actionable recommendations tailored to your website’s specific needs.

Evaluate their technical SEO tools and processes

A top agency uses modern SEO tools and a systematic approach to monitor performance, track indexing, and implement technical fixes efficiently, ensuring your website stays optimized over time.

Check case studies and results

Review past client results to see measurable improvements in rankings, organic traffic, and conversions. Embarque’s case studies highlight clients achieving up to 1,600% YoY revenue growth, demonstrating our ability to deliver real, impactful results.

Ensure transparent reporting

The right agency provides clear, consistent reports on completed tasks, their impact, and recommendations for next steps. Transparent reporting helps you understand the value of your investment and make informed decisions.

Here’s how we do GA4 reporting (step-by-step)

Look for a collaborative approach

Choose an agency that works closely with your team, offering guidance, strategy sessions, and seamless integration with your broader marketing efforts. A dedicated project manager can help coordinate tasks, keep communication clear, and ensure consistent delivery of results.

How much does it cost to hire a technical SEO agency?

Pricing for a technical SEO agency varies depending on your website size, complexity, and how in-depth you want your optimization to be. Here’s a simplified breakdown of typical packages you’ll find in the market:

Use our SEO ROI calculator to see how hiring a technical SEO agency could translate into faster indexing, higher rankings, and more organic traffic for your website.

At Embarque, we make technical SEO straightforward and results-driven. With packages starting at just $1,499/month, our tailored SEO services include not just technical SEO but also on-page optimization, content strategy and creation, link building, local SEO, and detailed performance reporting to ensure measurable growth for your business.

Boost your website’s health and rankings with Embarque

A technically optimized website is key to outranking competitors and capturing more organic traffic. Ensuring your site runs smoothly can unlock growth you didn’t realize was possible.

At Embarque, we combine technical SEO audits, structured data, site speed optimization, and content strategy to tackle every backend issue. Our hands-on approach has helped SaaS, marketplaces, and enterprises achieve millions of organic visitors while improving conversions and overall site performance.

Get started today with Embarque today — Book an intro call.