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COMPARISON GUIDE

Agency vs In-House Marketing
compared.

An honest side-by-side. Cost, time, pros, cons, and our take on which suits which type of London business.

BUILD

In-House Team

£15k–£40k / mo
6–12 mo to ramp

PROS

  • Total focus on your brand
  • Faster decision-making
  • Deep product knowledge accrues
  • Direct line to founders
  • Better culture fit

TRADE-OFFS

  • High fixed cost
  • Slow to ramp (6–12 months)
  • Vacation / sick coverage gaps
  • Niche skill gaps (PPC + SEO + design)
  • Must hire managers
  • Equipment, software, office overhead

BEST FOR

  • Companies over £10m revenue
  • Brand-focused / IP-sensitive companies
  • Long-horizon plays
  • Single-channel mastery (e.g. SEO-only)
vs
BUY

Agency Retainer

£3k–£15k / mo
2–4 wks to start

PROS

  • Multi-discipline team day-1
  • Specialised expertise (SEO + PPC + design + content)
  • No fixed cost — scale up / down
  • Cross-pollination across clients & industries
  • Senior strategist on retainer for less than one in-house hire

TRADE-OFFS

  • Less product-deep over time
  • Multiple agencies = coordination cost
  • Quality varies wildly between agencies
  • Less "always-on" feel

BEST FOR

  • Pre-Series-B companies
  • Multi-channel needs
  • Tight teams with growth pressure
  • Fractional CMO arrangements
WHICH IS RIGHT FOR YOU?

Decision matrix.

Revenue under £10m, growing
→
Agency
Pre-seed / seed startup
→
Agency (or fractional)
Revenue over £25m, brand-led
→
In-House
Need 5 channels (SEO, PPC, content, design, ads)
→
Agency
Need single-channel mastery
→
In-House
Want flexibility to pause / scale
→
Agency
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