Business phone system for advertising agencies

Advertising agencies in the United States

County Business Patterns counted 15,512 advertising agencies in the U.S. in 2023 (NAICS 541810, Advertising Agencies). They employed 200,465 people in mid-March and paid $21.4 billion in annual payroll. The average establishment has 12.9 employees. That is 4.6 establishments for every 100,000 residents.

California has the most (2,462), followed by New York (1,610), Florida (1,367), and Texas (1,264). Relative to population, District of Columbia leads with 11.4 per 100,000 residents, and West Virginia has the fewest at 1.8.

Why the phone matters for advertising agencies

Agencies manage many client relationships at once, and clients expect to reach their account team quickly. Recording and summarizing calls helps teams keep track of approvals and requests.

Calls advertising agencies commonly handle:

• A client calls to change a campaign budget.
• A prospect calls about agency services.
• A media rep calls about an ad placement.
• The agency calls a client to review creative.
• A production vendor calls about a shoot.

Texting and after-hours calls

Agencies text approvals and schedule changes.

Launch-day issues can be urgent; otherwise after-hours calls can wait.

How big advertising agencies are

68.2% of U.S. advertising agencies with employees had fewer than five people in March 2023. 80.1% had fewer than ten. Most phone decisions in this industry are made for small teams, where one shared number and sensible routing matter more than a desk phone per person.

Advertising agencies by state

Establishment counts for the 51 states (and DC) where Census published a figure, with the rate per 100,000 residents.

Largest metro areas for advertising agencies

Census published advertising agency counts for 351 metro and micropolitan areas. The 25 largest:

Phone system pricing for a 13-person advertising agency

The average U.S. advertising agency has 12.9 employees, so the comparison uses a 13-person team. Per-seat business phone plans bill every one of those people. At month-to-month list prices checked September 28, 2026, 13 users on RingCentral RingEX Core cost $390.00 a month and 13 on Ooma Office Pro cost $324.35. On Callata the same 13 people cost $259.00 a month, less than either per-seat plan.

The annual difference against RingCentral's monthly list price comes to $1,572. Some vendors discount annual contracts; the table shows month-to-month prices.

How Callata works for advertising agencies

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

Existing numbers can be ported at no charge, and team texting turns on after the one-time $49 carrier registration (10DLC) is approved.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.