CallataGuidesBusiness phone system for advertising agencies in St. Louis, MO-IL
Advertising agencies in the St. Louis, MO-IL metro area: 99 establishments in 2023, the local area codes, and what phone service costs a 17-person team.
- Establishments
- 99CBP 2023
- Employees
- 1,691mid-March 2023
- Per 100k residents
- 3.5U.S. 4.6
- Rank
- 32nd of 351areas by count
Advertising agencies in St. Louis, MO-IL by the numbers
The Census Bureau's 2023 County Business Patterns lists 99 establishments classified as Advertising Agencies (NAICS 541810) in the St. Louis, MO-IL metro area. Together they reported 1,691 mid-March employees and $138.4 million of payroll for the year. That ranks 32nd of the 351 metro and micropolitan areas where Census published a count for this industry.
With 2.8 million residents in the Census 2024 estimate, that is 3.5 advertising agencies per 100,000 people, 22.8% below the national rate of 4.6. Establishments average 17.1 employees, 32.2% above the U.S. average of 12.9. Payroll per employee comes to $81,855, 23.4% below the national $106,841.
| Measure | St. Louis, MO-IL | Missouri | United States |
|---|---|---|---|
| Establishments | 99 | 235 | 15,512 |
| Mid-March employees | 1,691 (moderate noise) | 5,183 (moderate noise) | 200,465 |
| Annual payroll | $138,416,000 (moderate noise) | $498,398,000 (moderate noise) | $21,417,972,000 |
| Employees per establishment | 17.1 | 22.1 | 12.9 |
| Payroll per employee | $81,855 | $96,160 | $106,841 |
| Establishments per 100,000 residents | 3.5 | 3.8 | 4.6 |
Census County Business Patterns 2023 (mid-March employment; annual payroll). Employees and payroll flagged high-noise are shown but not used in the text. Residents: Census Vintage 2024 estimates.
Team sizes at advertising agencies in St. Louis, MO-IL
Of the advertising agencies in St. Louis, MO-IL that had employees in March 2023, 53.1% had fewer than five (the U.S. share is 68.2%). 71.4% had fewer than ten. When a business has only a few people, whoever is free answers the phone, and calls that arrive while everyone is busy go to voicemail unless they are routed somewhere else.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 52 | 53.1% | 68.2% |
| 5–9 employees | 18 | 18.4% | 12.0% |
| 10–19 employees | 15 | 15.3% | 8.4% |
| 20–49 employees | 7 | 7.1% | 6.4% |
| 50 or more employees | 6 | 6.1% | 5.0% |
Employment-size classes count establishments by mid-March 2023 employment. Establishments with no March employees are excluded from the size classes, so shares are of establishments with employees. Source: Census County Business Patterns 2023.
Why the phone matters for advertising agencies in St. Louis, MO-IL
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. That holds for advertising agencies in St. Louis, MO-IL as much as anywhere.
A few of the calls that come in to advertising agencies in St. Louis, MO-IL:
- A prospect calls about agency services.
- A production vendor calls about a shoot.
- A client calls to change a campaign budget.
Calls after closing time
Launch-day issues can be urgent; otherwise after-hours calls can wait.
With business-hours routing, calls after closing can go to transcribed voicemail or an optional AI receptionist instead of ringing an empty room.
Callata vs. per-seat pricing for advertising agencies in St. Louis, MO-IL
The average advertising agency in St. Louis, MO-IL has 17.1 employees, so a 17-person team is a reasonable benchmark. Priced per seat, 17 users would run $510.00 a month on RingCentral RingEX Core and $424.15 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.
The annual difference against RingCentral's monthly list price comes to $2,052. Some vendors discount annual contracts; the table shows month-to-month prices.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $339.00 | $4,068.00 |
| Quo (Starter) | $19.00 per user | $323.00 | $3,876.00 |
| Nextiva (Core) | $23.00 per user | $391.00 | $4,692.00 |
| Ooma (Office Pro) | $24.95 per user | $424.15 | $5,089.80 |
| Dialpad (Standard) | $27.00 per user | $459.00 | $5,508.00 |
| RingCentral (RingEX Core) | $30.00 per user | $510.00 | $6,120.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Getting a local number in St. Louis, MO-IL
NANPA records place the exchanges of the area's named cities and towns in 8 area codes. 314 has the most, with 723 of 1,483 exchanges (49%). Callata's plan includes up to 3 local numbers; you can pick them in the area codes your clients recognize, subject to carrier inventory, or port the number you already have for free.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 314 | 723 | Central | 1947 | 557 |
| 618 | 324 | Central | 1947 | 730 |
| 636 | 308 | Central | 1999 | none |
| 557 | 71 | Central | 2022 | 314 |
| 730 | 30 | Central | 2023 | 618 |
| 217 | 14 | Central | 1947 | 447 |
| 573 | 11 | Central | 1996 | 235 |
| 447 | 2 | Central | 2021 | 217 |
Exchanges are NANPA-assigned central office codes (NPA-NXX) in the rate centers matched to the area's named places. Source: NANPA utilized code and NPA reports.
Setting up Callata for an advertising agency in St. Louis, MO-IL
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.
If you already have a number in St. Louis, MO-IL, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.
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.
Frequently asked questions
How many advertising agencies are there in St. Louis, MO-IL?
Census County Business Patterns counted 99 advertising agencies in the St. Louis, MO-IL metro area in 2023. They employed 1,691 people in mid-March.
What does a business phone system cost for a 17-person advertising agency?
At month-to-month list prices checked September 28, 2026, 17 users cost $510.00 a month on RingCentral RingEX Core and $424.15 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $339.00.
What area code should an advertising agency in St. Louis, MO-IL use?
Area code 314 has the most assigned exchanges among the area's named places, followed by 618 and 636. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for an advertising agency?
Yes. Callata's optional AI agents can answer when the team is busy or closed, take a message, text, email or transfer the call. They disclose that they are AI and are billed from prepaid AI minutes at $0.25 per minute.