CallataGuidesBusiness phone system for interior design services firms in St. Louis, MO-IL
Interior design services firms in the St. Louis, MO-IL metro area: 117 establishments in 2023, the local area codes, and what phone service costs a 3-person team.
- Establishments
- 117CBP 2023
- Employees
- 390mid-March 2023
- Per 100k residents
- 4.2U.S. 4.9
- Rank
- 29th of 324areas by count
How many interior design services firms are in St. Louis, MO-IL?
There were 117 interior design services firms in the St. Louis, MO-IL metro area in 2023, according to Census County Business Patterns (NAICS 541410, Interior Design Services). They employed 390 people in mid-March and paid $19.9 million in annual payroll. By establishment count the area is 29th out of 324 areas with published figures for interior design services firms.
Measured against its 2.8 million residents (2024 estimate), the area has 4.2 interior design services firms per 100,000 people; the U.S. rate is 4.9, so St. Louis, MO-IL is 15.7% below the national figure. The average establishment here has 3.3 employees, compared with 3.3 nationally. Payroll per employee comes to $51,059, 23.5% below the national $66,767.
| Measure | St. Louis, MO-IL | Missouri | United States |
|---|---|---|---|
| Establishments | 117 | 186 | 16,797 |
| Mid-March employees | 390 | 579 | 55,286 |
| Annual payroll | $19,913,000 | $26,682,000 | $3,691,277,000 |
| Employees per establishment | 3.3 | 3.1 | 3.3 |
| Payroll per employee | $51,059 | $46,083 | $66,767 |
| Establishments per 100,000 residents | 4.2 | 3.0 | 4.9 |
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.
How big interior design services firms in St. Louis, MO-IL are
Of the interior design services firms in St. Louis, MO-IL that had employees in March 2023, 75.0% had fewer than five (the U.S. share is 81.7%). 92.2% had fewer than ten. Small teams usually share the phone: the person who answers is often also serving a customer or doing the job, which is when calls get missed.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 87 | 75.0% | 81.7% |
| 5–9 employees | 20 | 17.2% | 12.1% |
| 10–19 employees | 9 | 7.8% | 4.3% |
| 20–49 employees | not published | — | 1.6% |
| 50 or more employees | 0 | 0.0% | 0.3% |
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.
Calls an interior design firm in St. Louis, MO-IL has to catch
Interior designers coordinate clients, contractors and vendors while spending much of the day on site. A business line that rings their cell and transcribes voicemail keeps project details from getting lost. That holds for interior design services firms in St. Louis, MO-IL as much as anywhere.
A few of the calls that come in to interior design services firms in St. Louis, MO-IL:
- A client calls about an installation date.
- A homeowner calls about a kitchen redesign.
- The designer calls a client to review selections.
Business texting for interior design services firms
Designers text photos, selections and delivery windows to clients and trades.
Texts sent from a local business number in St. Louis, MO-IL have to be registered with carriers first (10DLC); on Callata that is a one-time $49 fee, after which the whole team can text from the shared number.
Phone system pricing for a 3-person interior design firm
The average interior design firm in St. Louis, MO-IL has 3.3 employees, so a 3-person team is a reasonable benchmark. Priced per seat, 3 users would run $90.00 a month on RingCentral RingEX Core and $74.85 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). Callata costs $99.00 a month ($99 a month with 5 users included, then $20 per additional user), so at this team size both per-seat plans are cheaper; Callata drops below them from 4 users.
At this team size the per-seat plans cost less than Callata's $99 base price, which already covers 5 users; Callata becomes the lower price from 4 users.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $99.00 | $1,188.00 |
| Quo (Starter) | $19.00 per user | $57.00 | $684.00 |
| Nextiva (Core) | $23.00 per user | $69.00 | $828.00 |
| Ooma (Office Pro) | $24.95 per user | $74.85 | $898.20 |
| Dialpad (Standard) | $27.00 per user | $81.00 | $972.00 |
| RingCentral (RingEX Core) | $30.00 per user | $90.00 | $1,080.00 |
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%). A local number lets clients in St. Louis, MO-IL call without dialing out of area. Callata includes up to 3 local numbers, and which numbers are open in an area code depends on carrier inventory when you choose.
| 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.
How Callata works for interior design services firms
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
Porting a number you already use in St. Louis, MO-IL is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.
AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.
Frequently asked questions
How many interior design services firms are there in St. Louis, MO-IL?
Census County Business Patterns counted 117 interior design services firms in the St. Louis, MO-IL metro area in 2023. They employed 390 people in mid-March.
What does a business phone system cost for a 3-person interior design firm?
At month-to-month list prices checked September 28, 2026, 3 users cost $90.00 a month on RingCentral RingEX Core and $74.85 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $99.00.
What area code should an interior design firm 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 interior design firm?
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.