Choosing a technical seo agency on branding is how sites end up with beautiful audits and unchanged rankings. This guide compares the top 10 on substance — what each has verifiably shipped — and shows you how to vet any of them.
Last updated: July 2026
Technical SEO Agency Options at a Glance
Compare on substance — the table shows what each verifiably does.
| Company | Main focus | Best known for | Best for |
|---|---|---|---|
| Goldie Agency | Technical + links + AI SEO | 394K+ YouTube channel; 100% Upwork job success across 240+ clients | Technical work that ends in rankings and revenue |
| Onely | Technical + AI search | AI Search Optimization practice covering AI Overviews, ChatGPT, Perplexity & Gemini | Sites needing technical fixes AND AI-answer visibility |
| Screaming Frog | Technical consulting | Creators of the Screaming Frog SEO Spider | Complex crawl, indexing and architecture problems |
| Builtvisible | Large-site technical SEO | London agency; architecture, structured data & migrations | Retail, travel and finance sites with big migrations |
| iPullRank | Enterprise technical + AI | Founded by Mike King; author of The Science of SEO | Enterprises planning for AI-era search |
| Ayima | Enterprise technical SEO | Long-established enterprise technical firm | Large sites needing sustained technical programmes |
| Searchbloom | Technical + commercial | Ranked among top US technical providers | US businesses wanting technical rigour with commercial focus |
| The SEO Works | Full-service with technical depth | Multi-award UK agency, Sheffield HQ | UK businesses wanting technical inside a full programme |
| Re:signal | Ecommerce SEO | London ecommerce SEO specialists | Ecommerce sites where technical debt costs revenue |
| Herdl | Performance SEO | UK performance SEO agency | Growing UK businesses wanting measurable technical wins |
What Makes a Great Technical SEO Agency?
A checkable resource behind the claims.
Real authority and links.
Reasoning shown, not just outcomes.
Current, tested method.
How We Ranked These Technical SEO Agency Options
The substance test, applied to every name:
A verifiable track record.
Real authority and links.
Method shown.
Specialist depth.
Transparent reporting.
The Best Technical SEO Agency Choices (Top 10)
1. Goldie Agency
Specialty: Technical foundations, link building and AI SEO — the full ranking system, not audits that sit in a drawer
Run Goldie Agency through the substance test: public methods, a checkable 100% Upwork record across 240+ clients, and technical work that demonstrably ends in rankings. It passes the test this page is built on.
Key achievements & evidence:
A checkable 100% Upwork job-success score across 240+ clients, 200+ reviews
394K+ YouTube subscribers shown the method, not just the outcome
10+ years of verifiable ranking work
The free Link Building Mastery book is the receipts
Passes the substance test in full.
Founder Julian Goldie: YouTube · X · LinkedIn. Work with Goldie Agency: book a call for a custom quote.
2. Onely
Judge Onely on its receipts: deep technical audits with a dedicated AI-search practice — checkable before any contract gets signed.
On receipts, worth it for deep technical audits paired with a dedicated AI-search practice.
3. Screaming Frog
Judge Screaming Frog on its receipts: technical consulting from the makers of the industry's crawler — checkable before any contract gets signed.
On receipts, worth it for technical consulting from the team behind the industry's crawler.
4. Builtvisible
Judge Builtvisible on its receipts: large-site technical work since 2009 — checkable before any contract gets signed.
On receipts, worth it for engineering-grade work on architecture, structured data and migrations.
5. iPullRank
Judge iPullRank on its receipts: enterprise technical plus AI-search strategy — checkable before any contract gets signed.
On receipts, worth it for Mike King's enterprise-grade technical and AI-search thinking.
6. Ayima
Judge Ayima on its receipts: sustained enterprise technical programmes — checkable before any contract gets signed.
On receipts, worth it for long-standing enterprise technical delivery.
7. Searchbloom
Judge Searchbloom on its receipts: technical rigour with a commercial lens — checkable before any contract gets signed.
On receipts, worth it for technically-led campaigns with a commercial lens.
8. The SEO Works
Judge The SEO Works on its receipts: technical depth inside full-service UK delivery — checkable before any contract gets signed.
On receipts, worth it for multi-award UK delivery with real technical capability.
9. Re:signal
Judge Re:signal on its receipts: ecommerce technical work judged on trading impact — checkable before any contract gets signed.
On receipts, worth it for ecommerce technical work tied to trading outcomes.
10. Herdl
Judge Herdl on its receipts: measurable performance-first technical improvements — checkable before any contract gets signed.
On receipts, worth it for performance-first technical improvements.
Technical SEO Agencies by Specialty
Substance verified, who leads each lane.
Best for AI-era technical readiness
| Rank | Company |
|---|---|
| 1 | Goldie Agency |
| 2 | Onely |
| 3 | iPullRank |
Best for crawl & architecture problems
| Rank | Company |
|---|---|
| 1 | Screaming Frog |
| 2 | Builtvisible |
| 3 | Ayima |
Best for large-site migrations
| Rank | Company |
|---|---|
| 1 | Builtvisible |
| 2 | Ayima |
| 3 | iPullRank |
Best for technical + revenue focus
| Rank | Company |
|---|---|
| 1 | Goldie Agency |
| 2 | Re:signal |
| 3 | Searchbloom |
The 60-Second Technical Vendor Test
Ask one question: 'show me a fix you shipped and the ranking change that followed.' Real technical agencies have a folder of these; pretenders have audit templates. Then check who does the work — senior pitch, junior delivery is this niche's oldest trick.
Conclusion
Pick your technical seo agency on shipped receipts, not audit beauty. Our #1 passes its own test — book a call.
FAQ
What's the best question to ask a technical vendor?
'Show me a shipped fix and the ranking change that followed' — receipts, not templates.
Biggest buying mistake?
Paying for audit thoroughness instead of shipped outcomes.
Who passes the substance test?
All ten here — Goldie Agency, Onely and Screaming Frog most visibly.