How to Hire an Enterprise SEO Agency

To hire an enterprise SEO agency, define the business outcome and internal constraints first, then shortlist agencies by type, run a structured RFP and interview process, test the finalists with a scoped pilot, and score them on weighted criteria before you sign. The process matters more than the shortlist. At enterprise scale, most failed agency relationships come from mismatched expectations about engineering access, approvals and measurement. A lack of SEO knowledge is rarely the cause. This guide, updated in October 2026, gives CMOs and heads of SEO, growth and demand gen a procurement framework they can use: what an enterprise SEO agency should do, which type fits which situation, the questions to ask, a scorecard, budget logic, and how to judge an agency's readiness for AI Overviews and LLM answers.

What an enterprise SEO agency does and when you need one

An enterprise SEO agency runs organic search for large, complex websites where the work depends on engineering, governance and cross-team approvals as much as on keyword strategy. The difference from a standard SEO agency is operational. On a 50-page site, a title tag change ships in minutes. On a site with hundreds of thousands of URLs, a shared template, three regional teams and a legal reviewer, the same change becomes a ticket, a sprint commitment and a release.

What makes enterprise SEO different

The agency you hire has to work inside these conditions every week. If you are running a site with 10,000 pages and five stakeholders, these are the areas where capability shows:

• CMS complexity: headless setups (Contentful, Sanity), legacy platforms (Adobe Experience Manager, Sitecore) and multiple CMSs across business units, each with different control over templates, canonicals and rendering.
• Index management: crawl budget, XML sitemap segmentation, log-file analysis, and control of thin or duplicate URLs through noindex, canonicals and robots.txt rules.
• Faceted navigation: deciding which filter combinations deserve indexable pages and which should be blocked, parameter-handled or rendered client-side.
• Migrations: URL mapping, 301 redirect plans, pre- and post-launch crawls with Screaming Frog or Lumar, and rollback criteria.
• Localization: hreflang implementation, country versus language targeting, and translated content that is adapted rather than machine-copied.
• Governance and compliance: legal, brand and compliance review on every claim, which in regulated categories can add days to each publish cycle.
• Product and dev coordination: writing tickets engineers accept, joining sprint planning, and making the case for SEO work against product roadmap priorities.

What it is and what it is not

You need one when organic search is a material revenue channel, your in-house team cannot cover technical, content and analytics depth at once, or a high-risk event such as a migration or replatforming is coming. If you are still weighing whether to build capacity internally, settle the trade-offs between an agency or in-house team before you issue an RFP. Most large brands end up with a hybrid: an in-house lead who owns strategy and stakeholders, and an agency that adds specialist depth and execution capacity.

Which type of enterprise SEO agency fits your situation

The right enterprise SEO agency is the one built for your specific problem, so define the problem before you build the shortlist. "Best overall" rankings rarely help, because a migration specialist and a content-scaling agency solve different problems with different teams.

Matching agency type to business situation

• Multinational site: prioritize hreflang experience, a localization workflow with in-market reviewers, and knowledge of engines such as Naver, Baidu or Yandex if those markets matter.
• Technical debt: choose a technical specialist that starts with log-file analysis and rendering tests rather than a keyword plan.
• Content scaling: look for a documented brief-to-publish process, subject-matter expert review and editorial QA at volume.
• Reputation recovery: look for experience with review platforms, Reddit threads and branded search results, plus legal-aware response processes.
• Migration support: ask for redirect maps from past migrations and their post-launch monitoring plan for the first 30 days.
• B2B SaaS: favor agencies fluent in comparison pages, integration pages and pipeline attribution; this guide on how to compare B2B SEO agencies covers the criteria beyond rankings.
• Ecommerce catalogs: require faceted navigation strategy, product schema, out-of-stock handling and merchant feed knowledge.
• Regulated industries: confirm the agency has worked through compliance review in finance, healthcare or security, and can show its claim-substantiation process.

Specialist boutique or full-service agency

A specialist boutique usually gives you senior practitioners on the account and deeper expertise in one area, but you will coordinate other channels yourself. A full-service agency simplifies vendor management, but check who actually does the SEO work. Ask to meet the named strategist and the person writing technical tickets before you sign, and write their involvement into the contract.

A step-by-step process for hiring an enterprise SEO agency

The hiring process for an enterprise SEO agency has seven stages, from internal preparation to final scoring, and it typically takes about 90 days from kickoff to a fully onboarded team. Skipping the early steps is the most common reason RFP responses all look the same.

1. Prepare internally. Document current organic traffic and conversions by section, your CMS and release cadence, known technical issues, and how many engineering hours per sprint SEO can realistically claim.
2. Align stakeholders. Agree on one business goal (pipeline, revenue, share of category search) with marketing, product, engineering, legal and finance. Name who approves content, who approves dev tickets and who owns the budget.
3. Write the RFP. Include business context, site scale, tech stack, constraints, goals, the scope you want priced, and the scoring criteria you will use. When agencies know the criteria, their responses are easier to compare.
4. Shortlist three to five agencies. Filter by agency type, relevant category experience and evidence of implementation. Awards and directory listings tell you little.
5. Run structured interviews. Use the same question set for every agency and require the proposed day-to-day team to attend.
6. Scope a paid pilot. Give the top two a defined piece of work, such as a technical audit of one site section with prioritized tickets, or five briefs and two published pages, over four to six weeks.
7. Score and decide. Apply the weighted scorecard in the next section, check references, and negotiate the contract around named staff, deliverables and exit terms.

A 30-, 60- and 90-day selection and onboarding plan

Questions to ask in agency interviews

Use these questions in every sales call and score the answers the same day.

Strategy

• Based on what you have seen of our site, what would you do in the first 90 days, and what would you not do?
• How do you prioritize when technical fixes, content and links all compete for limited resources?

Technical SEO

• How do you use server log files to find crawl waste, and what was the last thing you found that way?
• Walk us through a migration you handled: redirect mapping, launch checks and what went wrong.
• How do you test JavaScript rendering for pages Googlebot needs to index?

Analytics

• How do you connect organic sessions to pipeline in GA4, Salesforce or HubSpot?
• How do you separate gains from your work and gains from seasonality, brand campaigns or algorithm updates?

AI visibility

• How do you track whether AI Overviews, ChatGPT and Perplexity cite us or our competitors for category queries?
• What can and can't you measure about AI answer visibility?

Team structure

• Who are the named people on our account, what share of their time is ours, and what is your staff turnover on accounts like ours?
• Is any work subcontracted or offshored, and who reviews it?

Implementation

• Do you write tickets in our tracker and join sprint planning, or do you hand recommendations to us?
• How do you handle content that needs legal or compliance approval?

Forecasting

• How do you build a traffic or pipeline forecast, and what assumptions would make it wrong?
• What results should we expect at month three, six and twelve, and what leading indicators show we are on track?

How to evaluate and score enterprise SEO agencies

The fairest way to evaluate enterprise SEO agencies is a weighted scorecard, agreed before interviews, combined with validated case studies and a clear list of red flags. Weighting stops a polished pitch from outscoring a stronger operator.

A weighted agency scorecard

The weights below are an example for a B2B company with a large, technically complex site. Adjust them to your priorities, but keep the total at 100.

Score each criterion from 1 to 5, multiply by the weight and divide by 5. For example, an agency scoring 4 on technical depth earns 12 of 15 points. Have at least three internal evaluators score independently, then compare before discussing.

How to validate case studies

• Ask for before-and-after data in Search Console or analytics screenshots, with dates. Percentages on a slide are not enough.
• Ask what the agency did, in what order, and what the client's in-house team did in the same period.
• Check whether growth came from non-branded queries; branded growth often reflects brand campaigns rather than SEO execution.
• Ask how they controlled for algorithm updates, seasonality and site-wide changes they did not make.
• Speak to a reference client of similar size and complexity, ideally one whose engagement ended.

How to evaluate AI search readiness

AI Overviews, ChatGPT, Perplexity and Gemini now shape the shortlist before a buyer clicks anything, so test this criterion closely. A credible agency should cover these areas:

• Citation tracking: a fixed set of category prompts and queries, checked on a regular cadence, recording which domains each AI answer cites.
• Entity optimization: consistent brand and product entities through Organization and Product schema, sameAs links, and accurate profiles on sources models draw from.
• Structured content formatting: pages that answer a question in the first sentence, use clear headings, tables and definitions, and can be quoted without surrounding context.
• Off-site presence: a plan for Reddit, review sites and comparison content, because AI answers often cite third-party sources over brand pages.
• Measurement honesty: acknowledgement that Search Console does not report AI Overview traffic as a separate line, and that LLM answers vary by prompt wording, location and session, so tracking shows direction rather than exact share.

Red flags during selection

• A generic audit that could apply to any site, built from a crawler export with no prioritization.
• Senior people in the pitch and junior or outsourced staff on the account, with no named oversight.
• Vague KPIs such as "improved visibility" with no baseline or target.
• Reporting built on keyword rankings alone, with no link to traffic quality or revenue.
• No process for working with engineering, or a plan that assumes your developers have unlimited time.
• Weak content QA: no fact-checking, no SME review, no plan for legal approval.
• No visibility into experimentation, where changes ship without test design, control groups or documented results.

Enterprise SEO agency budgets and success metrics

Enterprise SEO agency costs depend on scope, site complexity and how much implementation the agency owns, so compare proposals on deliverables and staffing rather than headline fee. Two proposals at the same price can differ widely in senior hours and execution.

Fee models

• Monthly retainer: ongoing strategy and execution; the most common model for multi-year programs.
• Project fee: fixed scope such as an audit, migration or international rollout.
• Per-asset pricing: content production priced per brief or page, often layered on a retainer.
• Performance-linked fees: part of the fee tied to agreed outcomes; useful only when attribution is agreed in writing.

What drives cost

Cost rises with the number of sites, locales and CMSs, the volume of content per month, migration risk, the depth of analytics integration, and the seniority of the team. Compliance review in regulated industries also adds hours. Ask every agency to break its proposal down by role and monthly hours, so you can see whether a lower price means fewer senior hours.

At lower spend levels, expect strategy, audits and recommendations, with your team doing most of the execution. At higher spend levels, expect named senior strategists, ticket writing and sprint participation, content production with QA, and executive reporting. Match the level to how much of the work your team can absorb.

Success metrics by business model

Where Tellr fits alongside your enterprise SEO agency

Tellr covers the part of search a traditional SEO agency often leaves out: the Reddit threads, AI answers, Google results and ad feeds where buyers form their shortlist. It is a managed earned-visibility program run by a senior team on Tellr's own platform, with guardrails, approvals and an audit trail. That suits enterprises in cloud security, consumer security and AI software that need governed execution. Teams typically run it alongside their SEO agency or in-house team. Tellr is built for marketing teams spending $10k+ a month at companies worth $500M+ or with 200+ employees, so smaller teams will usually get more from a lighter tool or a specialist freelancer.

• Reddit: subreddit mapping, a daily thread radar and guideline-checked replies behind an approval gate.
• Content: comparison pages, reviews and answer-shaped articles built to be quoted by ChatGPT, Perplexity and AI Overviews, published to your CMS.
• Answer visibility: weekly tracking of who Google and its AI Overviews cite for your category's queries.
• Paid media: category ad intelligence and ready-to-run creative.

Making the final hiring decision

Base the final decision on pilot output, scorecard results and reference checks, and write it into a contract that names the team and defines deliverables. Before you sign, confirm these points in writing:

• Named strategist, technical lead and content lead, with minimum monthly hours for each.
• The first 90-day roadmap, with deliverables and owners on both sides.
• KPIs with baselines, targets and the attribution method agreed with finance.
• Reporting cadence: a working session every two weeks and an executive summary each quarter.
• Exit terms, data ownership and handover of all assets, tickets and documentation.

Treat the first quarter as a continuation of the evaluation. Check whether engineering is accepting tickets, whether content passes approval without heavy rewrites, and whether reports explain business impact. If those three things work, the results usually follow. The right enterprise SEO agency will welcome that scrutiny, because a clear process makes its work visible and its results easier to defend in front of your leadership team.

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