The best LLM SEO agency on my list is Goldie Agency, and because it's my own agency, I'm telling you about that bias in the very first line.
LLM SEO means doing two jobs at once, which are getting your brand named inside the answers that large language models write and keeping your pages ranking in normal Google results.
My seven third-party picks are Previsible, Kaizen, Re:signal, Impression, WebFX, Ignite Visibility and Brainlabs, and I read each one's own service page on 18 October 2026.
This is the operator version, so after the ranking I'll give you the exact two-sided test I'd run on any LLM SEO agency before signing anything.
If you'd rather have a plan before you speak to anyone, book a free SEO strategy session and get a custom game plan for Google and AI search.
Here's my full ranking of the eight LLM SEO agencies in one table, with my own agency at number one.
| Rank | Agency | Best for |
|---|---|---|
| 1 | Goldie Agency (mine) | Links, content and AI visibility from one team |
| 2 | Previsible | Research-led AI visibility strategy |
| 3 | Kaizen | UK brands that want PR to feed AI citations |
| 4 | Re:signal | eCommerce brands |
| 5 | Impression | Brands that want SEO, PR and GEO together |
| 6 | WebFX | Businesses that want tracking software included |
| 7 | Ignite Visibility | US brands that want comparison and entity work |
| 8 | Brainlabs | Large brands working across owned and earned channels |
Top 3 Picks At A Glance
- 🥇 Goldie Agency is my pick, it's my own agency, and the first step is a free SEO strategy session.
- 🥈 Previsible is my top third-party pick, because its GEO page spells out a prompt cluster map, a competitive gap analysis and a placement strategy.
- 🥉 Kaizen is my pick for UK brands, because its page links citation insights directly to digital PR prospecting.
What LLM SEO Actually Means
LLM SEO is search engine optimisation for answers written by large language models, done alongside the classic SEO you already know.
When someone asks one of those tools for a recommendation, it writes a short answer and often names only a handful of businesses.
In my GEO examples video, I explain why that changes the game, because old search gave you ten blue links and even position seven still got clicks.
An AI answer might name one to three businesses, so there's no room for number seven any more.
| Side | What it covers | What you should see |
|---|---|---|
| Classic SEO | Technical health, pages that rank, links and content | Rankings and clicks in Search Console |
| LLM side | Your brand in AI answers, citations, brand facts and third-party mentions | Dated AI answers that name you and cite your pages |
Google's AI features guide says AI Overviews and AI Mode have no additional requirements beyond normal SEO, so an agency that skips the classic side is building on sand.
How I Ranked These LLM SEO Agencies
I ranked each agency on what its own service page says today, because that's what I can check for you.
- I checked that the page advertises AI search, GEO or LLM optimisation as a service right now.
- I checked that the page also covers classic SEO work, because LLM SEO needs both sides.
- I noted the first step the page offers, such as a call, an audit or a proposal.
I deliberately avoided the agencies I've already ranked in my best GEO agency and AI SEO optimization agency posts, so this list gives you fresh names.
I haven't hired the seven third-party agencies, and I haven't listed prices, because agencies quote after a call.
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The 8 Best LLM SEO Agencies In 2026
1. Goldie Agency (My Agency)
Goldie Agency is the SEO and link building agency I started on my own, and it now has 70+ people in Bangkok.
The site lists link building with manual outreach and no PBNs, a Complete Site Audit and AI Automation, which covers the classic side.
The strategy session page covers the LLM side, because it says the agency helps brands get found, cited and recommended by Google and AI across AI Overviews, ChatGPT, Perplexity and Gemini.
It says AI platforms look for consistent signals across the wider web, such as trusted publications, expert articles, independent reviews and comparisons.
In my GEO examples video, I show Google's AI Overview for "best HARO agency" listing five suppliers and linking Goldie Agency first, which is my own result on my own screen and not a promise for yours.
Best for: I'd pick it for brands that want links, content and AI visibility handled by one team.
First step: I describe the first step in my video as a free one-to-one GEO, AEO and AI audit call, where we look at your site, your competitors and the keywords you're closest to winning.
→ Book your free SEO strategy session
2. Previsible
Previsible has a GEO Strategy page that says AI visibility is binary, because your brand is either cited or it isn't.
The page says it audits how and where you're cited, what's being said and how competitors are positioned, then fixes the gaps.
It lists three deliverable areas, which are content and placement strategy, visibility and measurement, and GEO implementation.
Best for: I'd pick it for teams that want a research-led plan with a prompt cluster map and a competitive gap analysis.
First step: Its page offers a "Talk to an Expert" call.
3. Kaizen
Kaizen describes itself as a GEO and AI search agency in London that helps brands rank in AI and LLM results.
Its page says it builds prompt banks, tracks visibility across multiple models and uses fan-out analysis and entity mapping to find content gaps.
It also says it uses frequently cited sources to build targeted prospect lists for digital PR, which is a neat bridge between the two sides.
Best for: I'd pick it for UK brands that want digital PR aimed at the sources AI tools already cite.
First step: Its page offers a free performance audit and a "Book a call" option.
4. Re:signal
Re:signal calls itself the GEO agency for eCommerce brands.
Its AI search page says GEO isn't a replacement for SEO and is built on it, which is exactly the LLM SEO view.
It measures three things, which are influence (are you the source), visibility (how often you appear against competitors) and recommendation (how often your products are suggested).
Best for: I'd pick it for online shops that care about product recommendations inside AI answers.
First step: Its page offers a scoping call for a fixed-scope audit or a chat about an ongoing programme.
5. Impression
Impression has a generative engine optimisation agency page and offices in Nottingham, London and Manchester.
The page describes GEO as an evolution of traditional SEO and says good GEO is based on a strong organic search strategy.
Best for: I'd pick it for brands that want SEO, PR and GEO run by one multi-channel team.
First step: Its page invites you to get in touch with the team.
6. WebFX
WebFX has an AI search optimisation and GEO services page.
The page says every engagement begins with a GEO audit, followed by an AI search strategy and ongoing AI search optimisations.
It says effective AI search work starts with a strong SEO foundation, and it names its own OmniSEO tracking platform for AI visibility across 10+ AI platforms.
Best for: I'd pick it for businesses that want an agency and a visibility tracking tool in one package.
First step: Its page offers a free proposal.
7. Ignite Visibility
Ignite Visibility has an AI SEO services page and is based in San Diego.
The page describes making content retrievable by AI systems, writing answer-first content and building comparison and alternatives pages that AI tools often cite.
It also describes keeping your brand entity consistent across your site, Wikipedia, Wikidata and directories, and tracking AI share of voice, citations and sentiment.
Best for: I'd pick it for US brands that want comparison content and entity clean-up done together.
First step: Its page offers a free proposal.
8. Brainlabs
Brainlabs has an AI search optimisation page built around three layers, which are your website, your owned channels and your earned presence.
The page lays out what your first 90 days look like, starting with a full AI visibility opportunity assessment and a baseline across ChatGPT, Gemini, Perplexity and Google AI Mode.
Best for: I'd pick it for larger brands that need SEO, PR, brand and social teams working on AI search together.
First step: Its page offers a "Speak to a Brainlabber" contact.
📞 Not sure which LLM SEO agency fits your brand? Book a free SEO strategy session and my team will show you where AI tools mention you today, why competitors appear more often and which keywords you're closest to winning. → Get your free game plan
The 8 LLM SEO Agencies Compared
| Rank | Agency | Classic SEO side on its site | LLM side on its site | First step shown |
|---|---|---|---|---|
| 1 | Goldie Agency (mine) | Link building, a Complete Site Audit and AI Automation | Trusted-source coverage across Google, AI Overviews, ChatGPT, Perplexity and Gemini | A free strategy session |
| 2 | Previsible | Technical SEO, SEO strategy and content marketing | Prompt cluster maps, gap analysis and GEO implementation | A call with an expert |
| 3 | Kaizen | Search, content and technical teams | Prompt banks, fan-out analysis and citation-led PR | A free performance audit |
| 4 | Re:signal | Technical foundations and structured product data | Influence, visibility and recommendation tracking | A scoping call |
| 5 | Impression | Organic search strategy and technical work | PR, LLM-friendly content and technical GEO | A contact form |
| 6 | WebFX | An SEO foundation review | A GEO audit and OmniSEO tracking | A free proposal |
| 7 | Ignite Visibility | Technical AI-readiness and on-page work | Comparison pages, entity clarity and AI share of voice | A free proposal |
| 8 | Brainlabs | Technical fixes and structured data | Three-layer AI visibility with a 90-day plan | A contact form |
The order is my judgement of how clearly each site covers both sides, and it isn't a quality score.
🚀 Ready to put Best LLM SEO Agency to work in your business? Inside the AI Profit Boardroom you get step-by-step video trainings, my installable Agent OS and four coaching calls a week with 3,400+ members building real automations. → Join the AI Profit Boardroom
The Two-Sided Test I'd Run On Any LLM SEO Agency
This is the operator part, so here's the exact test I'd use if I were hiring an agency other than my own.
Step 1: Write twenty buyer prompts
Write twenty questions a real buyer would type into ChatGPT, Claude, Gemini or Google before choosing a business like yours.
Step 2: Record your LLM baseline
Ask every prompt in each tool, and save the answer with the date, the brands named and the sources cited.
Ask each prompt more than once, because AI answers change from one chat to the next.
Step 3: Record your classic SEO baseline
Export your top queries, clicks and positions from Search Console for the last three months.
Google counts AI Overviews and AI Mode traffic inside the "Web" search type of the Search Console Performance report, so this export already includes some AI data.
Step 4: Score every agency on both sides
| Question | Side | A strong answer | Points |
|---|---|---|---|
| Which of my prompts would you target first, and why? | LLM | It names prompts and the sources currently cited | 20 |
| Which third-party sites would you try to get me mentioned on? | LLM | It names real publications, reviews and comparisons in my market | 20 |
| How will you fix the facts about my brand across the web? | LLM | It names the profiles, listings and pages it would check | 10 |
| What technical fixes come first? | Classic | It names crawl, speed and indexing issues on my site | 15 |
| How will you build links and content? | Classic | It describes real outreach and pages written from experience | 20 |
| How will you report progress? | Both | Raw dated answers plus Search Console data | 15 |
Anything under 70 points goes in the bin.
Step 5: Sign a short first phase
Agree a 90-day first phase with deliverables you can inspect, and re-run both baselines at the end.
🔥 Want the AI SEO system I run on my own sites? Inside the AI Profit Boardroom, you get my AI SEO trainings, the installable Agent OS and the search workflows my agents use to publish answer-first pages. You'll be alongside 3,400+ members, with four coaching calls a week. → Get access here
What I Look For Because Of My Own Results
In my GEO examples video, I show Google's AI Overview for "best geo expert" naming me first, and several of my own pages appear in its sources.
I also show one of my sites going from zero to about 1,300 Google clicks a day, with over 9,600 impressions inside Google's AI features on a single day.
Those are my numbers from my own screens, and I share them so you know what I'm basing my criteria on, not as a promise for your site.
My system, which I call the answer engine, comes down to three moves.
- The first move is to be the source, which means every page carries a real case study or test that only you could have run.
- The second move is to be everywhere, which means several sites and platforms that each take a different angle but point to the same answer.
- The third move is to be first, which means publishing within about 24 hours of a new topic appearing.
The Google Rule Every LLM SEO Agency Should Follow
On 1 October 2026, Google updated its guidance on using generative AI content.
It says "It is critical to manually factcheck and review all AI-generated content" before you publish it.
It says that review also applies to titles, meta descriptions, structured data and image alt text.
So ask every agency who checks the facts on each page before it goes live, and walk away if the answer is nobody.
📞 Want a second opinion on an agency proposal? Grab a free SEO strategy session with Goldie Agency and bring the proposal with you, and we'll tell you what it covers on both sides and what it misses. → Claim your free session
Red Flags When Hiring An LLM SEO Agency
- Walk away from any agency that guarantees ChatGPT, Claude, Gemini or Google's AI will recommend you.
- Walk away from any plan that only covers AI answers and ignores rankings, because the two sides feed each other.
- Walk away from anyone selling special schema or an AI text file as the secret, because Google says AI Overviews and AI Mode don't need them.
- Walk away from any agency that won't show you raw, dated AI answers.
Nobody can guarantee what a model says, and that includes me and Goldie Agency.
Related Reading On This Site
- My LLM SEO services agency guide shows what an agency should deliver month by month once you've signed.
- My best GEO agency list ranks eight different agencies if you want a wider shortlist.
- My AEO audit guide shows how to run the AI answer baseline yourself.
Final Verdict On The Best LLM SEO Agency
Goldie Agency is my pick, and I've been open about the bias from the first line.
Previsible is the third-party agency I'd call first for a research-led plan, and Kaizen is the one I'd call first for a UK brand that wants PR to drive AI citations.
Run the two-sided test, keep your own baselines and never pay for a guarantee.
If you'd like a head start, book a free SEO strategy session and get a custom game plan for Google and AI search.
Also On Our Network
- 🌐 Which LLM SEO agency fits your kind of business
- 🌐 Eight LLM SEO agencies compared side by side
- 🌐 An LLM SEO agency quick start with your Agent OS keeping score
- 🌐 The language models behind AI answers, scored on GoldieBench
FAQ: Hiring The Best LLM SEO Agency
What is the best LLM SEO agency in 2026?
I rank my own agency, Goldie Agency, first and I disclose that bias.
My third-party picks are Previsible, Kaizen, Re:signal, Impression, WebFX, Ignite Visibility and Brainlabs.
What is LLM SEO?
LLM SEO is the work of getting your brand named and cited in answers from large language models such as ChatGPT, Claude and Gemini.
It also keeps the classic SEO that those answers often draw on.
Is LLM SEO different from GEO?
They overlap heavily.
GEO is the name from the research world, and LLM SEO is the name many buyers use when they want AI answers and Google rankings handled together.
Can an LLM SEO agency guarantee that ChatGPT will recommend me?
No, because nobody can guarantee what a model says.
Treat any guarantee as a red flag.
How do I vet an LLM SEO agency?
Score it on both sides, which are the classic SEO side and the LLM side.
The two-sided scorecard above gives you six questions and a 100-point total.
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About Julian
I'm Julian Goldie, an SEO entrepreneur, author and founder of the AI Profit Boardroom, which has 3,400+ members.
I help business owners scale with AI agents, automation and SEO.
- I started Goldie Agency on my own, and it is now a 7-figure SEO and link-building agency with 70+ people.
- I've grown my YouTube channel to 400,000+ subscribers.
- I wrote "Link Building Mastery".
- My Udemy courses have taught 29,000+ students.
→ Get my best AI training inside the AI Profit Boardroom
Run the two-sided test, keep your own baselines, and you'll hire the best LLM SEO agency for your brand without paying for a promise.
