Best Technical SEO Agencies (2026), Scored on Evidence
The best technical SEO agencies in 2026, scored on public evidence: case studies, Clutch rates, contract terms, time on your account, and AI crawler work.
The best technical SEO agencies in 2026 are iPullRank for enterprise sites and AI search, Onely for JavaScript rendering and Core Web Vitals, Uproer for mid-market ecommerce, and SALT.agency for international sites and migrations. Go Fish Digital, Seer Interactive, and Orainti round out the seven agencies that cleared my scorecard.
I am not on this list. I run SEO and AI search strategy for B2B SaaS companies, technical audits included, and I scored every agency below the same way: from public evidence on its own site, its Clutch profile where one exists, and its case studies, all checked in November 2026. The scores are my opinion based on that evidence. If an agency has public proof I missed, it can send it through my contact page and I will re-score it. More vetting guides live in the SEO services library.
A list like this matters more than it used to, because AI answers are built from them. In a citation export across six B2B SaaS accounts I track, 88.7% of the sources AI answers cited were independent third parties, and only 2.6% were the brand’s own site. When an engineering lead asks ChatGPT for the best technical SEO company, the answer comes from lists like this one, which is where ChatGPT gets its information.
The best technical SEO agencies at a glance
Minimum engagement is the smallest total budget the agency reports on Clutch for a whole engagement, which can span several months. Hours are an estimate: a $5,000 monthly budget divided by the agency’s Clutch hourly rate.
| Agency | Best for | My score | Minimum engagement (total) | Hours $5,000 a month buys | Engineers on staff |
|---|---|---|---|---|---|
| iPullRank | Enterprise sites, AI search | 72 | $50,000+ | Not listed | Relevance and SEO engineers |
| Onely | JavaScript rendering, Core Web Vitals | 67 | $10,000+ | 17 to 25 | Works through your developers |
| Go Fish Digital | Technical SEO inside a full-service program | 65 | $5,000+ | Not listed | Yes, in-house developers |
| Seer Interactive | Enterprise analytics-led SEO | 62 | $10,000+ | 17 to 25 | Developers for its own data platform |
| Uproer | Mid-market ecommerce | 61 | $5,000+ | 25 to 33 | Writes specs and QA, no code |
| SALT.agency | International sites and migrations | 59 | No Clutch profile | Not listed | Yes, in-house development team |
| Orainti | International and ecommerce consulting | 55 | No Clutch profile | Not listed | Consultancy, your team implements |
How I scored these technical SEO agencies
Every agency was scored out of 100 on public evidence only. If something was not public, it scored zero on that line, and I say “not public” so you know what to ask for.
| Criterion | Points | What earns full marks |
|---|---|---|
| Proof of outcomes | 25 | Case studies with business numbers (revenue, leads, recovered traffic after a migration), ideally dated |
| Technical depth | 15 | Specialist work on rendering, migrations, international, crawl, or performance, with published tools or research |
| Senior attention | 15 | Real hours on your account at a typical budget, and a clear picture of who does the work |
| Pricing and terms | 10 | Published pricing, minimums, or contract terms, and a clean exit |
| Strategy | 10 | A published, specific method, original research, or free tools |
| Reporting | 10 | Reports on revenue, leads, or recovered traffic |
| AI search | 10 | AI crawler access and AI visibility treated as technical work, with a stated way of measuring it |
| Reviews | 5 | Verified client reviews, recent and plentiful |
Four things disqualify an agency outright, because each one has cost my clients money before: guaranteed rankings or guaranteed placement in AI answers, cheap monthly link packages, no verifiable case study anywhere, and growth claims with no baseline and no business number. These come straight from the red flags in my guide on how to choose an SEO agency.
On time and senior attention. No agency publishes how many hours you get, so I estimate it from each agency’s Clutch rate. Technical work is where that number bites hardest, because a migration audit alone can take a senior specialist a few days. I carry five accounts as a senior strategist, which leaves me about a day a week for each, and that is the benchmark I hold agencies to.
What I could not see. Several agencies here do not list a rate or minimum on Clutch or publish pricing. Those lines score zero until they are public. I read the individual case study pages, where most of the dates and baselines live.
Engineers on staff. Whether an agency has its own developers decides whether it ships fixes or hands your team a ticket list. I report it for every agency, sourced, and leave it out of the score, because the right answer depends on your own engineering capacity.
Here is the full breakdown, so you can check my work or re-weight it for your situation.
| Agency | Proof (25) | Depth (15) | Attention (15) | Pricing (10) | Strategy (10) | Reporting (10) | AI search (10) | Reviews (5) | Total |
|---|---|---|---|---|---|---|---|---|---|
| iPullRank | 22 | 14 | 7 | 3 | 10 | 8 | 8 | 0 | 72 |
| Onely | 15 | 15 | 11 | 3 | 6 | 6 | 6 | 5 | 67 |
| Go Fish Digital | 18 | 7 | 8 | 3 | 7 | 8 | 9 | 5 | 65 |
| Seer Interactive | 12 | 9 | 8 | 3 | 10 | 9 | 9 | 2 | 62 |
| Uproer | 15 | 12 | 8 | 8 | 6 | 7 | 5 | 0 | 61 |
| SALT.agency | 20 | 15 | 5 | 0 | 8 | 6 | 5 | 0 | 59 |
| Orainti | 12 | 13 | 12 | 0 | 7 | 5 | 6 | 0 | 55 |
Best technical SEO agencies for complex and enterprise sites
Large sites break in ways small sites never do: millions of URLs, JavaScript frameworks, faceted navigation, and migrations that move everything at once. A technical SEO firm for this tier has to read logs, render pages the way Googlebot does, and work alongside your engineers.
iPullRank
Best for: enterprise brands with large, complex sites that want technical SEO and AI search handled as one discipline.
What the evidence shows: iPullRank frames its work as relevance engineering alongside technical SEO and content, and lists clients including Target, American Express, and Adidas. Its homepage cites “$2.4 billion in incremental revenue” for a financial services client and “130% in traffic recovery” for an automotive publisher. Its case studies page dates every entry, from April 2025 to May 2026. The car publisher case study reports 13 million more visits over two years after crawl, log file, and SERP analysis and a series of workshops with the client’s product teams, and the financial services case study reports a 121% increase in sign-ups over six months.
iPullRank’s team page lists relevance engineers and an SEO engineer, and founder Mike King lists three decades in web development. It publishes an AI Search Manual and a research newsletter, The Rank Report. On Clutch, it lists a $50,000+ minimum engagement, 10 to 49 employees, a 2014 founding, and New York headquarters, with no reviews.
My take: dated case studies are rare in this market, and a firm that publishes a manual on how AI search retrieves content is a firm with a real method. For an enterprise site, this is the most complete technical and AI search pick here.
The catch: Clutch lists a $50,000+ minimum engagement, so it fits larger programs, and there are no verified reviews on Clutch. Its case studies describe the work shipping through the client’s own product and engineering teams, so plan for your developers to implement.
Score: 72/100.
Onely
Best for: JavaScript-heavy sites, rendering problems, and Core Web Vitals work.
What the evidence shows: Onely lists JavaScript SEO and Core Web Vitals as technical specializations, alongside traffic drop recovery, international SEO, AI-aware migrations, and generative engine optimization, and shows logos including eBay, Oracle, Atlassian, and IKEA. On Clutch, it lists a $10,000 minimum, a $200 to $300 rate, 10 to 49 employees, and a 5.0 rating from 19 reviews, and says “a dedicated senior specialist stays through implementation and testing.” Reviewers report a 40% year-over-year revenue increase (October 2022) and 129% organic traffic growth (August 2020). Its JavaScript SEO page describes “actionable, prioritized advice for your development team” and working “with your development team to bring the project to fruition,” so your engineers ship the changes.
My take: if you need a JavaScript SEO agency, this is the specialist on the list. A senior specialist who stays through implementation is the thing most technical engagements lack. Recommendations that never ship are the most common way a technical audit fails.
The catch: at $200 to $300 an hour, $5,000 buys about 17 to 25 hours, and several of the reviews with numbers are a few years old.
Score: 67/100.
SALT.agency
Best for: international sites, hreflang, and site migrations.
What the evidence shows: SALT.agency describes itself as “a specialist enterprise SEO agency and AI visibility consultancy,” with offices in London, Leeds, and Boston, and publishes free tools including a Hreflang Checker, a Bulk Redirect Generator, and a Search Console BigQuery SQL helper. Its case studies include 318% organic traffic growth for Cloudflare, 40% non-branded organic growth for JetBrains, a 63% Core Web Vitals improvement for an invoicing software company, a 100% traffic increase after a migration for Bikmo, and 385% organic revenue growth for International Filter Products. The Cloudflare case study shows US organic visits growing from 22.4K to 235.9K a month over three years, and the Bikmo migration consolidated four country sites onto one domain, starting in early 2021.
SALT.agency also has an in-house development team, which built its Mirador software.
My take: free tools built for hreflang and redirects tell you what an agency spends its days on. For an international migration, I would want this team on the shortlist.
The catch: pricing is not public, and I found no Clutch profile.
Score: 59/100.
Best for ecommerce and international technical SEO
Ecommerce technical SEO is a catalog problem: faceted navigation, out-of-stock pages, duplicate product URLs, and a platform that decides more than your team does. An international SEO agency adds hreflang, country targeting, and translated templates on top.
Uproer
Best for: mid-market ecommerce brands ($10 million to $1 billion in revenue) that want technical and on-page SEO with clear contract terms.
What the evidence shows: Uproer offers technical and on-page SEO, paid search, and GEO and AEO, and was started in May 2017 by its founder and CEO, Griffin Roer. It publishes its terms: a one-month commitment for the strategy phase, then an annual commitment with 60-day terms. On Clutch, it lists a $5,000+ minimum, a $150 to $199 rate, 10 to 49 employees, a 60% ecommerce focus, and mid-market companies as 80% of its clients, and cites a client’s organic traffic growing from 100,000 in 2019 to more than 4 million in 2023. Its enterprise ecommerce page says: “While we don’t write code, we provide detailed technical specs, collaborate closely with your engineering teams, and QA every implementation.”
My take: published contract terms are a green flag I almost never see. A one-month strategy phase before an annual commitment is the right order: diagnose first, then sign for the program. The specs-and-QA model fits a brand with its own engineers.
The catch: there are no verified reviews on Clutch, and the AI search service has no stated way of measuring it.
Score: 61/100.
Orainti
Best for: international, ecommerce, and SaaS companies that want a senior consultant to direct their own technical team.
What the evidence shows: Orainti is a Madrid-based SEO and AI search consultancy led by Aleyda Solis, who lists 19 years of SEO experience and was named European Search Personality of the Year in 2018. It offers international SEO, ecommerce and SaaS SEO, audits, and training, and shows testimonials from Turo, Trade Republic, and Krisp. One client describes SEO traffic growing 500% after a year of working together.
My take: this is a consultancy, and that is the point. You get senior judgment from someone who has done international SEO for nearly two decades, and your engineers do the implementation.
The catch: pricing is not public, there is no Clutch profile, and the results on the site are testimonials more than case studies.
Score: 55/100.
Best full-service agencies with technical depth
Some companies need technical SEO as one workstream inside a bigger program: content, paid search, digital PR, and AI visibility under one contract. These two are full-service agencies with real technical benches.
Go Fish Digital
Best for: brands that want technical SEO, AI search monitoring, and paid media in one program.
What the evidence shows: Go Fish Digital is based in Raleigh, describes itself as a GEO and full-service digital marketing agency with 20 years in search, and runs Barracuda, its own tool for monitoring how brands appear in ChatGPT. Its site cites a 500% year-over-year increase in organic sales-qualified leads for SimpleTexting and a 74.8% increase in clicks for MoneyGeek, and shows logos including HP, Lowe’s, and LegalZoom. Its web design and development team includes developers, so it can build and ship site changes itself. On Clutch, it lists a $5,000+ minimum, 250 to 999 employees, a 2005 founding, and a 5.0 rating from 13 reviews.
My take: a 500% lift in sales-qualified leads is the kind of result I trust, because it is a pipeline number. The in-house AI monitoring tool shows it treats AI search as something to measure.
The catch: technical SEO is one service among many here, so ask who on the team owns your technical work.
Score: 65/100.
Seer Interactive
Best for: enterprise brands that want analytics-led SEO and original AI search research.
What the evidence shows: Seer Interactive offers organic search, GEO, paid media, analytics, and CRO, cites 130+ enterprise clients with a 92% retention rate, and publishes original AI search studies monthly that have been cited by Forbes, eMarketer, and Search Engine Land. On Clutch, it lists a $10,000+ minimum, a $200 to $300 rate, 50 to 249 employees, a 2002 founding, and Philadelphia headquarters, with a 3.8 rating from four reviews. Its developers build SeerSignals, Seer’s own data platform, and I found no client web development service, so plan for your team to ship site changes. One March 2020 reviewer wrote that “changes in account management led to a reduction in service quality.”
My take: a 92% retention rate across 130+ enterprise clients is strong evidence that the work holds up, and the research program is among the best in the industry.
The catch: technical SEO sits inside a broader analytics and search practice, and the Clutch reviews are few and mixed.
Score: 62/100.
Technical SEO agencies I considered and cut
Four agencies on other technical SEO lists fell short on evidence, for the reasons below.
- Screaming Frog: best known for its SEO Spider crawler, which I use. Its agency side publishes little client proof, and the one review on its Clutch profile covers the crawler software.
- Webris: appears on technical lists as an audit specialist, but its site now positions it as a law firm marketing agency.
- Builtvisible: now part of Brave Bison, and its homepage positions it around SEO, content, and digital PR.
- Brainlabs: its homepage positions it as a media agency with an AI visibility service, and I found no technical SEO offering.
How to choose a technical SEO agency
The best technical SEO agency for you is the one built for the problem you actually have. Name the problem first.
- A migration or redesign: you need redirect mapping, staging checks, and launch-day monitoring. Look at SALT.agency or Onely, and read my guide on redesigning without losing SEO.
- A JavaScript site that is not being indexed: you need rendering expertise. Onely is built for it.
- A large or enterprise site: you need log analysis, crawl budget work, and engineers who will talk to yours. Look at iPullRank or Seer Interactive.
- An ecommerce catalog: you need faceted navigation, product URL, and inventory rules. Look at Uproer, and compare it with the store-focused agencies on my best ecommerce SEO agencies list.
- International markets: you need hreflang and country targeting. Look at SALT.agency or Orainti.
- Decide who ships the fixes. If your engineers are backlogged, look at an agency with its own developers (Go Fish Digital, SALT.agency). If you have engineers, a specs-and-QA model (Onely, Uproer) or a consultancy (Orainti) puts your budget into senior judgment.
What a good technical audit should find
A good technical audit finds problems you did not know you had, ranked by business impact. On a healthcare software account I run, the first technical review found 541 URLs failing Interaction to Next Paint in field data, a blog platform exposing 292 articles at 620 URLs through duplicate tag pages, FAQ questions tagged as H5s, and a robots.txt rule blocking Google-Extended. Broken heading outlines showed up on all five of my accounts. If an agency’s audit sample reads like a generic checklist with none of that specificity, keep looking.
The checks that decide technical SEO are deterministic: status codes, canonicals, directives, and the rendered HTML. AI is useful for triage and explanation on top of those checks, which is how I run audits and what I cover in the best AI for technical SEO.
Green flags
- Recommendations come with an owner, an effort estimate, and the business impact, ranked.
- A senior specialist stays through implementation and verifies the fix.
- Case studies with dates and a business number, such as recovered revenue after a migration.
- Published tools, research, or a method you can read before you sign.
- They raise AI crawler access as a decision for you to make.
Red flags
- Guaranteed rankings or guaranteed placement in AI answers.
- An audit made of tool exports with no prioritization.
- A long contract before anyone has diagnosed the site.
- Results reported only as traffic or “issues fixed.”
Questions to ask before you sign
- Who runs my technical work, and will that person talk to my engineers?
- How many hours a month does my budget buy, and how many are senior?
- Show me a dated case study from a site like mine, with a business number.
- How do you test rendering, and which tools do you use for logs and crawls?
- How do you prioritize fixes when engineering time is scarce?
- How do you handle AI crawlers in robots.txt, and how do you measure AI visibility?
- What happens in the first month, and can we stop after the audit?
- Do you have developers who ship fixes, or do you write tickets for my team?
Technical SEO and AI crawlers
AI crawler access is now part of technical SEO, and it is a business decision more than a technical default. Google says Google-Extended controls whether content from your site can be used to train Gemini models and for grounding, and that it “does not impact a site’s inclusion in Google Search nor is it used as a ranking signal in Google Search.” On the healthcare software account above, robots.txt blocked Google-Extended, and I recommended reversing it for AI visibility after a legal review.
A good technical SEO company will show you which AI crawlers your robots.txt allows, whether your important content renders without JavaScript for crawlers that do not execute it, and how your robots.txt choices trade privacy against AI visibility.
What a technical SEO agency costs
Technical SEO services from the agencies on this list start around $5,000 a month or a $5,000 to $10,000 project, and enterprise programs run far higher. The published signals:
- Minimum engagements on Clutch (the total for a whole engagement): $5,000+ (Uproer, Go Fish Digital), $10,000+ (Onely, Seer Interactive), and $50,000+ (iPullRank).
- Clutch hourly rates: $150 to $199 (Uproer) and $200 to $300 (Onely, Seer Interactive).
- Published terms: Uproer’s one-month strategy phase, then annual with 60-day terms.
At a $5,000 monthly budget, those rates buy about 17 to 33 hours a month. That covers a focused audit or a month of steady implementation support, rarely both, so ask how the hours split. Technical SEO audit services are often sold as a fixed project, which is the right way to start. My full breakdown of pricing models is in how much does SEO cost.
When an agency is the wrong answer
An agency retainer is the right tool when technical work is constant: a large site, frequent releases, or an ongoing migration. Two situations call for something smaller.
- A small or mid-size site: Search Console catches most of the big errors on its own. A fixed-scope SEO and GEO audit gives you the prioritized list, and the technical SEO guide covers the fundamentals.
- A company with its own engineers: you need senior technical direction, and your team can ship it. That is the work I do as a technical SEO consultant, and results from my accounts are on my work page.
For a list scored on the same method for a different market, see my best healthcare SEO agencies, or my best SaaS and B2B SEO agencies if you sell software.
Frequently asked questions
What is a technical SEO agency?
A technical SEO agency is a firm that makes a site easy for search engines and AI crawlers to crawl, render, index, and understand. The work covers site architecture, rendering, redirects and migrations, canonicals and directives, page speed, international targeting, structured data, and the audits that find what is broken.
How is a technical SEO agency different from a regular SEO agency?
A technical SEO agency specializes in the infrastructure of a site, while a full-service SEO agency spreads its work across content, links, and technical fixes. Technical specialists read server logs, debug JavaScript rendering, and plan migrations with your engineers, which is work a generalist team often hands off.
How much does a technical SEO agency cost?
A technical SEO agency costs about $5,000 a month and up among the agencies I scored, or a $5,000 to $10,000 project for an audit, with minimum total engagements on Clutch from $5,000 to $50,000+. Enterprise migrations and ongoing programs cost the most.
What technical SEO issues do agencies fix?
Technical SEO agencies fix crawl waste, duplicate URLs, broken redirects and canonicals, JavaScript content that does not render for crawlers, slow pages and failing Core Web Vitals, hreflang errors, broken heading structure, and robots.txt rules that block pages or crawlers by mistake.
Can a technical SEO agency fix Core Web Vitals?
A technical SEO agency can diagnose Core Web Vitals and specify the fixes, and your developers or platform usually ship them. Ask whether the agency stays through implementation and re-tests field data afterward, because lab scores improve faster than the field data Google uses.
Do you need a technical SEO agency or a technical SEO consultant?
You need a technical SEO consultant when your own engineers can implement and you need senior direction, and an agency when you need a team to carry ongoing technical work at volume. Many companies start with a consultant-led audit and decide after they see the backlog.
Does technical SEO matter for AI search?
Technical SEO matters for AI search because AI crawlers can only use what they can reach and read. That means robots.txt rules that allow the crawlers you want, content that renders without JavaScript for crawlers that do not execute it, and clean, specific pages an answer can quote.