CallataGuidesBusiness phone system for computer systems design services firms in Denver, CO
Computer systems design services firms in the Denver-Aurora-Centennial, CO metro area: 991 establishments in 2023, the local area codes, and what phone service costs a 15-person team.
- Establishments
- 991CBP 2023
- Employees
- 14,390mid-March 2023
- Per 100k residents
- 32.5U.S. 17.1
- Rank
- 14th of 577areas by count
How many computer systems design services firms are in Denver, CO?
County Business Patterns counts 991 computer systems design services firms (NAICS 541512, Computer Systems Design Services) in the Denver-Aurora-Centennial, CO metro area for 2023. Together they reported 14,390 mid-March employees and $1.9 billion of payroll for the year. That ranks 14th of the 577 metro and micropolitan areas where Census published a count for this industry.
With 3.1 million residents in the Census 2024 estimate, that is 32.5 computer systems design services firms per 100,000 people, 90.0% above the national rate of 17.1. Establishments average 14.5 employees, 10.1% above the U.S. average of 13.2. Payroll per employee comes to $129,092, 5.7% above the national $122,171.
| Measure | Denver, CO | Colorado | United States |
|---|---|---|---|
| Establishments | 991 | 1,661 | 58,113 |
| Mid-March employees | 14,390 | 25,134 (moderate noise) | 766,160 |
| Annual payroll | $1,857,628,000 | $3,053,316,000 (moderate noise) | $93,602,442,000 |
| Employees per establishment | 14.5 | 15.1 | 13.2 |
| Payroll per employee | $129,092 | $121,481 | $122,171 |
| Establishments per 100,000 residents | 32.5 | 27.9 | 17.1 |
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.
Establishment size: computer systems design services firms in Denver, CO
Of the computer systems design services firms in Denver, CO that had employees in March 2023, 77.3% had fewer than five (the U.S. share is 74.5%). 86.1% had fewer than ten. For a business of a few people, phone coverage is a staffing question as much as a technology one: someone has to be free to pick up, or the call needs somewhere sensible to go.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 763 | 77.3% | 74.5% |
| 5–9 employees | 87 | 8.8% | 9.7% |
| 10–19 employees | 53 | 5.4% | 6.5% |
| 20–49 employees | 38 | 3.9% | 5.0% |
| 50 or more employees | 46 | 4.7% | 4.4% |
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 computer systems design services firms in Denver, CO
Managed IT and systems integration firms field support calls that range from a forgotten password to a server outage. Clients judge them by how quickly someone answers when something breaks. That holds for computer systems design services firms in Denver, CO as much as anywhere.
A few of the calls that come in to computer systems design services firms in Denver, CO:
- A prospect calls to ask about managed IT.
- A vendor calls about a hardware order.
- The firm calls a client to schedule maintenance.
When nobody can pick up
Outages do not keep business hours, so routing urgent after-hours calls to an on-call technician is common.
With business-hours routing, calls after closing can go to transcribed voicemail or an optional AI receptionist instead of ringing an empty room.
What a phone system costs an IT services firm in Denver, CO
The average IT services firm in Denver, CO has 14.5 employees, so a 15-person team is a reasonable benchmark. Per-seat business phone plans bill every one of those people. At month-to-month list prices checked September 28, 2026, 15 users on RingCentral RingEX Core cost $450.00 a month and 15 on Ooma Office Pro cost $374.25. On Callata the same 15 people cost $299.00 a month, less than either per-seat plan.
The annual difference against RingCentral's monthly list price comes to $1,812. 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 | $299.00 | $3,588.00 |
| Quo (Starter) | $19.00 per user | $285.00 | $3,420.00 |
| Nextiva (Core) | $23.00 per user | $345.00 | $4,140.00 |
| Ooma (Office Pro) | $24.95 per user | $374.25 | $4,491.00 |
| Dialpad (Standard) | $27.00 per user | $405.00 | $4,860.00 |
| RingCentral (RingEX Core) | $30.00 per user | $450.00 | $5,400.00 |
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.
Local area codes for computer systems design services firms in Denver, CO
NANPA records place the exchanges of the area's named cities and towns in 4 area codes. 303 has the most, with 740 of 1,472 exchanges (50%). 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 |
|---|---|---|---|---|
| 303 | 740 | Mountain | 1947 | 720, 983 |
| 720 | 693 | Mountain | 1998 | 303, 983 |
| 983 | 32 | Mountain | 2022 | 303, 720 |
| 719 | 7 | Mountain | 1988 | none |
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 computer systems design services firms
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.
If you already have a number in Denver, CO, 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 computer systems design services firms are there in Denver, CO?
Census County Business Patterns counted 991 computer systems design services firms in the Denver-Aurora-Centennial, CO metro area in 2023. They employed 14,390 people in mid-March.
What does a business phone system cost for a 15-person IT services firm?
At month-to-month list prices checked September 28, 2026, 15 users cost $450.00 a month on RingCentral RingEX Core and $374.25 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $299.00.
What area code should an IT services firm in Denver, CO use?
Area code 303 has the most assigned exchanges among the area's named places, followed by 720 and 983. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for an IT services 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.