Marketing and Advertising Agencies
Marketing and advertising agencies sell growth. Some run the whole function, some go deep on one channel like search, social, or email, and some exist to buy media at scale. What unites them is the model: a client pays a retainer, a percentage of spend, or a project fee for demand it cannot generate in house. This is the largest and most crowded group on the map, and the overlap between categories is heavy, because most agencies claim at least three of them.
All 26 categories
Ordered by estimated sizeDigital Marketing (Full Service)
Full service online marketing under one retainer.
SEO Agencies
Winning organic search traffic from Google and AI engines.
Social Media Marketing
Running brand accounts, content, and community on social platforms.
Advertising Agencies (Traditional)
Campaign creative and media across TV, radio, print, and digital.
PPC / Paid Media Agencies
Managing paid ads on Google, Meta, and other auction platforms.
Content Marketing
Editorial content that earns attention and converts buyers.
PR / Communications
Earning media coverage and managing public reputation.
Marketing Automation / CRM Partners
Implementing and running CRM and marketing automation platforms.
Branding / Brand Strategy
Brand strategy, naming, identity, and the system behind them.
Video Marketing
Video content engines for social, ads, and sales, not one big film.
Event Marketing
Events built to produce pipeline, not just attendance.
Email Marketing
Email and SMS programs, from flows to deliverability.
Media Buying
Planning and purchasing ad inventory at negotiated rates.
Growth Marketing
Experiment-driven marketing across the whole funnel.
Fractional CMO Firms
Part-time marketing executives for companies between hires.
Influencer Marketing
Finding, paying, and managing creators for brands.
Amazon / Marketplace Agencies
Managing brands' sales and ads on Amazon and other marketplaces.
Direct Mail
Physical mail campaigns, from postcards to dimensional packages.
Affiliate Marketing
Building and policing pay-for-performance partner programs.
Experiential Marketing
Live brand experiences: activations, pop-ups, tours, and stunts.
Conversion Rate Optimization
Turning more of your existing traffic into customers.
Podcast Production & Marketing
Producing and promoting podcasts for brands and executives.
Reputation Management
Repairing and defending what search and reviews say about you.
ABM Agencies
B2B marketing aimed at named target accounts, not audiences.
SMS / Text Marketing
Text message campaigns, subscriber growth, and compliance.
App Store Optimization
Getting mobile apps found and downloaded in the app stores.
Comparisons touching this group
The Margin Map: net margins across 12 agency types, compared
Every agency sits in the middle and takes a cut. The size of the cut that survives as profit varies by a factor of ten. Here is the map.
Insurance agencies and marketing agencies have the same business model (almost)
One sells protection, one sells growth. Strip away the subject matter and the economics are nearly identical. The few places they diverge explain why one of them is a sellable asset and the other usually is not.
The agency types AI helps vs the agency types AI threatens
Exposure has almost nothing to do with how technical the work is. It has everything to do with what the client is actually paying for.