CallataGuidesBusiness phone system for custom computer programming services firms in St. Louis, MO-IL
Custom computer programming services firms in the St. Louis, MO-IL metro area: 452 establishments in 2023, the local area codes, and what phone service costs a 19-person team.
- Establishments
- 452CBP 2023
- Employees
- 8,770mid-March 2023
- Per 100k residents
- 16.1U.S. 20.0
- Rank
- 30th of 563areas by count
Custom computer programming services firms in St. Louis, MO-IL by the numbers
There were 452 custom computer programming services firms in the St. Louis, MO-IL metro area in 2023, according to Census County Business Patterns (NAICS 541511, Custom Computer Programming Services). They employed 8,770 people in mid-March and paid $1.1 billion in annual payroll. By establishment count the area is 30th out of 563 areas with published figures for custom computer programming services firms.
Measured against its 2.8 million residents (2024 estimate), the area has 16.1 custom computer programming services firms per 100,000 people; the U.S. rate is 20.0, so St. Louis, MO-IL is 19.7% below the national figure. The average establishment here has 19.4 employees, compared with 14.9 nationally. Payroll per employee comes to $119,832, 3.6% below the national $124,254.
| Measure | St. Louis, MO-IL | Missouri | United States |
|---|---|---|---|
| Establishments | 452 | 733 | 68,051 |
| Mid-March employees | 8,770 | 17,120 | 1,012,250 |
| Annual payroll | $1,050,923,000 (moderate noise) | $1,885,175,000 | $125,775,835,000 |
| Employees per establishment | 19.4 | 23.4 | 14.9 |
| Payroll per employee | $119,832 | $110,115 | $124,254 |
| Establishments per 100,000 residents | 16.1 | 11.7 | 20.0 |
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 custom computer programming services firms in St. Louis, MO-IL are
Of the custom computer programming services firms in St. Louis, MO-IL that had employees in March 2023, 67.2% had fewer than five (the U.S. share is 72.0%). 78.9% 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 | 303 | 67.2% | 72.0% |
| 5–9 employees | 53 | 11.8% | 10.1% |
| 10–19 employees | 42 | 9.3% | 7.0% |
| 20–49 employees | 28 | 6.2% | 5.9% |
| 50 or more employees | 25 | 5.5% | 4.9% |
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 a custom software firm in St. Louis, MO-IL has to catch
Small software shops juggle client meetings, support requests and sales calls with a team that is mostly heads-down building. A shared line with routing keeps support from interrupting developers while still answering clients.
A few of the calls that come in to custom computer programming services firms in St. Louis, MO-IL:
- A partner agency calls about a subcontract.
- A client calls to schedule a demo.
- A prospect calls to discuss a new app project.
Texting clients
Firms text release notices and meeting reminders.
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 19-person custom software firm
The average custom software firm in St. Louis, MO-IL has 19.4 employees, so a 19-person team is a reasonable benchmark. On a per-user plan that headcount sets the bill: $474.05 a month on Ooma Office Pro or $570.00 on RingCentral RingEX Core at list price (checked September 28, 2026). Callata comes to $379.00 a month for 19 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $2,292 less than RingCentral for a custom software firm in St. Louis, MO-IL of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $379.00 | $4,548.00 |
| Quo (Starter) | $19.00 per user | $361.00 | $4,332.00 |
| Nextiva (Core) | $23.00 per user | $437.00 | $5,244.00 |
| Ooma (Office Pro) | $24.95 per user | $474.05 | $5,688.60 |
| Dialpad (Standard) | $27.00 per user | $513.00 | $6,156.00 |
| RingCentral (RingEX Core) | $30.00 per user | $570.00 | $6,840.00 |
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.
What custom computer programming services firms in St. Louis, MO-IL get with Callata
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 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 custom computer programming services firms are there in St. Louis, MO-IL?
Census County Business Patterns counted 452 custom computer programming services firms in the St. Louis, MO-IL metro area in 2023. They employed 8,770 people in mid-March.
What does a business phone system cost for a 19-person custom software firm?
At month-to-month list prices checked September 28, 2026, 19 users cost $570.00 a month on RingCentral RingEX Core and $474.05 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $379.00.
What area code should a custom software 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 a custom software 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.