Written by: Ben Adams | September 12, 2026 | | Last reviewed: September 17, 2026
If you lead marketing at a growth-stage B2B SaaS company, choosing between an SEO consultant and an SEO agency often becomes urgent when organic growth stalls and the board starts asking what search is contributing to pipeline. The practical difference is straightforward: you work directly with a consultant, while an agency assigns a team that is usually coordinated through an account manager.
I run a fractional CMO practice that includes SEO services, so I have a stake in this comparison. There are still situations where I would recommend an agency. I have called those out below so you can judge the trade-offs for yourself.
The short version
The decision usually comes down to two questions: who will do the work after the contract is signed, and whether your team has time to act on the plan.
- A consultant gives you direct access to one senior SEO practitioner; an agency gives you a coordinated team; a fractional consultant combines senior direction with hands-on execution in a part-time role.
- Choose a consultant if you need senior direction and already have people who can execute. Select an agency if several workstreams need to move at once or procurement requires a larger vendor.
- Use a fractional consultant if you need strategy and execution from the same senior person but do not want to add a full-time role.
- Before you sign, ask who will work on the account, what are the deliverables, and how the provider will approach the work outlined in the contract.
The three options side by side
Start with the work your team can already cover. If your writers and developer have capacity, you may only need experienced direction. If nobody can carry the work, an agency’s larger team becomes more useful. A fractional consultant makes sense when you want one senior person to set the direction and stay involved in execution. The table below shows what you are buying in each case.
| Consultant | Agency | Fractional consultant | |
|---|---|---|---|
| What you buy | Senior judgment on what to target and why | A team and a process | Strategy and hands-on work from one senior person |
| Who does the day-to-day work | Your team or freelancers, following the consultant’s plan | Specialists coordinated by an account manager | The person who sold you the work |
| How it is priced | Hourly, by project, or a monthly retainer | Tiered monthly retainers that scale with scope | A monthly retainer for a set share of their time |
| Works best when | The problem is strategic and you can execute | You need high volume across several disciplines | You need the plan and the work, without a full-time hire |
| Strains when | You need heavy production on several fronts at once | You need senior attention on a narrow set of problems | The workload outgrows one person |
| What it costs | $100 to $171 per hour, or by project | $2,000 to $20,000 per month as a retainer | A monthly retainer for a set share of one person’s time |
When a consultant fits
A consultant fits when the problem is mainly strategic and your team has the time to act on what comes back. Diagnosing a ranking drop. Picking the next set of topics. Working out whether the site structure itself is the thing holding you back. You hire one experienced person, and your own writers and developer do the work. For a lean team that can already execute, this is usually the cheapest thing that works.
One person can only do so much. If you need content production, technical fixes, and a design refresh in the same month, you will be waiting on your consultant.
When an agency fits
An agency makes more sense when several workstreams need to move at the same time and nobody on your team can coordinate them. Its advantage is capacity: strategists, writers, link builders, and sometimes developers working through a shared process.
That structure can also create distance. Ask whether the senior person in the pitch will work on the account, who manages the specialists, do they provide a project manager and a strategist, and how much access you will have to them. Part of the retainer pays for that coordination, whether or not every specialist is active in a given month.
I would recommend an agency when you need sustained production across content, links, paid search, social media, and SEO. The same applies when you need coverage that does not depend on one person’s availability, or when procurement requires formal service levels and a larger vendor. In those cases, capacity and continuity matter more than direct access to one consultant.
When a fractional consultant fits
For a lean team that needs both direction and execution, a fractional consultant can fill the gap. This is an experienced marketer who works part-time inside your team and handles the strategy as well as the hands-on work. You work directly with that person without adding a full-time salary. It is how I work, so the questions below apply to me as much as to any other provider.
Why it matters who does the work
The value of direct senior involvement becomes clearer when an SEO problem has to be traced through the site and then fixed with another team. At a media company where I led growth marketing, the flagship site ran on a JavaScript-rendered LMS platform that Google could not index properly, so almost nothing ranked. I traced the cause, worked with engineering on a pre-render fix so every page could be crawled, and then built SEO practices across the site that grew leads 50 percent within the following 12 months compared to the previous 12 months.
Finding the issue was only part of the job. Someone had to stay involved until engineering implemented the fix and the SEO changes were in place. Ask who will own that handoff before you hire either a consultant or an agency.
Four questions to settle it
1. Who on your team can act on a plan this quarter? Start with the people you already have. If a writer or developer can take on the work this quarter, a consultant may be enough. If they cannot, advice alone will leave you with another backlog.
2. How many workstreams need to run at once? Count the ones that genuinely need to move together. One senior person may be able to lead three or four; a broader content, technical, and authority program usually needs a team.
3. Who will manage the vendor each week? Be honest about the time available for vendor management. An agency model built around weekly coordination will struggle if nobody on your team owns the relationship.
4. Do they know your category? Category experience matters when it changes the advice. A learning platform, a transportation management system (TMS), and a healthcare product have different buyers, sales cycles, and search behavior. Ask for a relevant example and how the provider connected search performance to pipeline. I work mainly with B2B SaaS companies in LMS and edtech, logistics and TMS, and healthcare. But much of my work is industry agnostic as that information can be learned and supplied by the client. The marketing strategies and tactics transfer across industries fluently in most cases.
Before you sign, ask any provider
- Who will do the work each week? Ask for a name. If it is not the person leading the pitch, meet the person who will own the account.
- What will be finished by the end of month two? Ask for three deliverables: an SEO audit of the site’s information architecture and existing content; keyword research with clear scoring rules for deciding what content to build; and the foundations of a content hub that organizes the content assets, calendar, and execution strategy around your business goals, data, and team inputs. Ask who owns each deliverable.
- Will paid media be an aspect of your campaign strategy? You’ll ask the provider whether they have expertise in paid search, display, paid social and other types of paid media campaigns.
- How will you earn citations in AI answers? Pew Research Center tracked 68,879 Google searches in March 2025. Users clicked a traditional result on 8 percent of visits with an AI summary, compared with 15 percent when no summary appeared. Conventional rankings still matter, but your provider should also be able to explain how the content is structured so answer engines can understand and cite it. This work is often described as AEO or GEO. If the provider cannot explain the approach in plain terms, treat that as a gap.
How I would decide
Make the choice based on the constraint inside your team. Hire a consultant when you have execution capacity but need senior direction. Hire an agency when several disciplines must move at once. Consider a fractional consultant when you need one senior person to set the direction and carry out the work. The label matters less than knowing who will do the work and what your team can support.
If you want one person doing both, here is how I structure fractional engagements. And if you would rather talk it through against your own situation, get in touch. I will tell you which of the three you need, including when the answer is an agency.
Frequently asked questions
What does an SEO consultant cost compared with an agency?
Pricing overlaps more than the labels suggest. Agencies usually sell tiered monthly retainers that include account management and coordination. Consultants may charge by the hour, project, or monthly retainer, with rates varying by experience and scope.
Clutch, drawing on reviews from more than 65,000 SEO companies, puts typical agency retainers at $2,000 to $20,000 per month and the most common hourly band at $100 to $149 (September 2026). Ahrefs surveyed 439 providers and reported an agency average of $98.90 per hour and $3,209 per month, compared with $171.18 per hour for consultants. Backlinko, based on a survey of more than 300 SEO professionals, puts senior rates at $101 to $150 per hour and expert rates at $151 to $200 and above. It puts the most common monthly retainer at $1,001 to $2,500, with $2,501 to $5,000 typical for competitive industries (December 2025).
A senior consultant may cost as much as an agency by the hour. The more useful comparison is the monthly scope: who will work on the account, what they will deliver, and how much coordination is included.
Can a consultant also do the execution?
Some do, and the useful question is what breaks when they do. One person doing strategy and execution means the strategy stays connected to what is actually being completed, which is the upside. It also means that when that person has a heavy month, both stop at once. Ask any fractional provider what happens to your work when they take two weeks off.
What is the difference between a fractional head of SEO and a consultant?
A fractional head of SEO joins part-time and takes responsibility for the function. They set priorities and may manage employees, freelancers, or agencies. A consultant is usually hired to solve a defined problem without running the team, although the roles can overlap in practice.
When should I move from a consultant to an agency, or back?
Move from a consultant to an agency when the work requires more parallel production than one person can provide. Move back when your internal team can handle execution and needs senior direction, or when the agency’s coordination layer is slowing decisions.
Does either cover AEO and GEO?
Either can, but the capability depends on the people doing the work rather than the business model. Ask how the provider makes content and structured information easy for AI answer engines to understand and cite, and ask for an example. If they cannot explain the method in plain terms, treat it as a capability gap.