CallataGuidesBusiness phone system for interior design services firms in Missouri
186 interior design services firms operated in Missouri in 2023. Where they are, how big their teams are, and what phone service costs them.
- Establishments
- 186CBP 2023
- Employees
- 579mid-March 2023
- Per 100k residents
- 3.0U.S. 4.9
- State rank
- 23rd of 51by count
Interior design services firms in Missouri by the numbers
County Business Patterns counts 186 establishments in Missouri classified as Interior Design Services (NAICS 541410) for 2023. They employed 579 people in mid-March and reported $26.7 million in annual payroll. That is the 23rd highest count among the 51 states and DC with published figures. Interior design services firms make up 0.12% of the 151,475 business establishments in the state.
Per 100,000 residents (2024 estimate) Missouri has 3.0 interior design services firms, 39.7% below the national rate of 4.9. The average establishment has 3.1 employees against 3.3 nationally. Payroll per employee is $46,083, 31.0% below the U.S. figure of $66,767.
| Measure | Missouri | United States |
|---|---|---|
| Establishments | 186 | 16,797 |
| Mid-March employees | 579 | 55,286 |
| Annual payroll | $26,682,000 | $3,691,277,000 |
| Employees per establishment | 3.1 | 3.3 |
| Payroll per employee | $46,083 | $66,767 |
| Establishments per 100,000 residents | 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.
Where interior design services firms in Missouri are concentrated
Census published interior design firm counts for 4 metro or micropolitan areas that include part of Missouri. The largest is St. Louis, MO-IL, with 117 establishments (a multi-state area; its count covers every state it spans). Single-state metro and micropolitan areas account for 16% of the statewide total; the rest are outside any published area or in areas Census suppressed.
| Area | Establishments | Employees | Per 100k residents |
|---|---|---|---|
| St. Louis, MO-IL | 117 | 390 | 4.2 |
| Kansas City, MO-KS | 98 | 238 | 4.3 |
| Springfield, MO | 20 | 50 | 4.0 |
| Columbia, MO | 9 | 36 | 4.1 |
Source: Census County Business Patterns 2023; population from Census Vintage 2024 estimates.
Team sizes at interior design services firms in Missouri
77.7% of Missouri's interior design services firms with employees had fewer than five people in March 2023, compared with 81.7% nationally. 95.7% had fewer than ten. At that size the phone is shared, so routing (who rings, when, and what happens after hours) matters more than the number of desk phones.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 143 | 77.7% | 81.7% |
| 5–9 employees | 33 | 17.9% | 12.1% |
| 10–19 employees | 8 | 4.3% | 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.
Why the phone matters for interior design services firms in Missouri
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.
Typical inbound and outbound calls for interior design services firms in Missouri:
- A vendor calls about a backordered item.
- The designer calls a client to review selections.
- A contractor calls with a measurement question.
What interior design services firms text about
Designers text photos, selections and delivery windows to clients and trades.
Texting from a local number in Missouri requires carrier registration (10DLC), a one-time $49 fee on Callata.
Callata vs. per-seat pricing for interior design services firms in Missouri
Interior design services firms in Missouri average 3.1 employees, so the comparison uses a 3-person team. On a per-user plan that headcount sets the bill: $74.85 a month on Ooma Office Pro or $90.00 on RingCentral RingEX Core at list price (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.
Area codes in Missouri
Missouri has 9 geographic area codes in service according to NANPA. Callata includes up to 3 local numbers, so an interior design firm can hold a number in more than one of them.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 573 | 786 | Central | 1996 | 235 |
| 816 | 785 | Central | 1947 | 975 |
| 314 | 783 | Central | 1947 | 557 |
| 417 | 711 | Central | 1950 | none |
| 660 | 516 | Central | 1997 | none |
| 636 | 435 | Central | 1999 | none |
| 557 | 83 | Central | 2022 | 314 |
| 235 | 41 | Central | 2024 | 573 |
| 975 | 28 | Central | 2023 | 816 |
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 in Missouri
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
Porting a number you already use in Missouri 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 in Missouri?
186 in 2023, according to Census County Business Patterns. They employed 579 people in mid-March.
Which Missouri metro area has the most interior design services firms?
St. Louis, MO-IL, with 117 establishments in 2023.
What does a phone system cost a 3-person interior design firm?
$90.00 a month on RingCentral RingEX Core or $74.85 on Ooma Office Pro at month-to-month list prices (checked September 28, 2026); $99.00 on Callata ($99 a month with 5 users included, then $20 per additional user).
Do I need to register to text customers from a Missouri number?
Yes. US carriers require business texting from local numbers to be registered (10DLC). On Callata the registration is a one-time $49 fee, and texting turns on once it is approved.