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In-House vs Agency SEO

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Quick Answer

An in-house SEO specialist costs $8,000-$15,000/month per person (salary + tools). A specialist agency provides 5-10 people from $1,499/month. The breakeven is typically 18 months for businesses under $50M revenue.

Both models work. The right choice depends on your budget, growth stage, and how much SEO expertise you need. Here is the honest comparison.

Cost Comparison

Factor In-House Agency
Monthly cost $8,000-$15,000+ (salary + tools) $1,500-$10,000
Team depth 1 person (usually) 5-10 specialists
Skill breadth Limited to one hire Technical + content + links + AI
Ramp-up time 2-4 months (hiring + onboarding) 1-2 weeks
AI Search (AEO/GEO) Requires new skillset Included (with RankSages)
Flexibility Hard to scale up/down Scale monthly (no contracts with RankSages)

When In-House Makes Sense

  • You have $150K+ annual budget for SEO salary, tools, and content
  • SEO is deeply integrated into product (SaaS, marketplace, publisher)
  • You need someone embedded in your company culture full-time
  • You already have an agency and need someone to manage the relationship

When an Agency Makes Sense

  • You need a full team of specialists, not one generalist
  • Your budget is $1,500-$10,000/month (cannot afford a full-time hire)
  • You need to start producing results quickly (no 3-month hiring process)
  • You want access to AI search optimization, link building, and technical expertise
  • You want month-to-month flexibility without employment commitments

The Hybrid Model

Many growing companies use both. An in-house marketing manager handles day-to-day coordination and company knowledge. An agency provides the specialized execution team (technical SEO, content production, link building, AI optimization). This gives you the best of both worlds at a lower total cost than building a full in-house team.

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Frequently asked questions

When does in-house SEO make sense?

In-house SEO makes sense for businesses over $100M revenue with multi-year strategic horizons and the budget for a 5-10 person specialist team ($600K-$1.5M/year fully loaded). Below that, agency scales better.

When does an agency make sense?

For businesses under $50M revenue, or those wanting access to multiple specialists without hiring overhead. Agencies provide breadth (SEO + AEO + GEO + PPC + content) at a fraction of in-house cost.

What is the typical breakeven?

Around month 18 for businesses planning a permanent SEO function. Before month 18, agency is cheaper. After month 18, the calculus depends on team productivity and turnover risk.

Can you do both?

Yes. Many growth-stage companies use an agency for specialist work (technical audits, AI Search Optimization, link building) while keeping an in-house generalist for content production and stakeholder coordination.

References & further reading

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