CallataGuidesBusiness phone system for engineering services firms in Chicago, IL-IN
Engineering services firms in the Chicago-Naperville-Elgin, IL-IN metro area: 1,434 establishments in 2023, the local area codes, and what phone service costs a 20-person team.
- Establishments
- 1,434CBP 2023
- Employees
- 28,500mid-March 2023
- Per 100k residents
- 15.2U.S. 18.6
- Rank
- 6th of 735areas by count
How many engineering services firms are in Chicago, IL-IN?
The Census Bureau's 2023 County Business Patterns lists 1,434 establishments classified as Engineering Services (NAICS 541330) in the Chicago-Naperville-Elgin, IL-IN metro area. Together they reported 28,500 mid-March employees and $3.3 billion of payroll for the year. That ranks 6th of the 735 metro and micropolitan areas where Census published a count for this industry.
With 9.4 million residents in the Census 2024 estimate, that is 15.2 engineering services firms per 100,000 people, 18.0% below the national rate of 18.6. Establishments average 19.9 employees, in line with the U.S. average of 19.9. Payroll per employee comes to $114,958, 4.6% above the national $109,949.
| Measure | Chicago, IL-IN | Illinois | United States |
|---|---|---|---|
| Establishments | 1,434 | 1,752 | 63,233 |
| Mid-March employees | 28,500 | 35,017 | 1,260,577 |
| Annual payroll | $3,276,316,000 | $3,866,951,000 | $138,599,619,000 |
| Employees per establishment | 19.9 | 20.0 | 19.9 |
| Payroll per employee | $114,958 | $110,431 | $109,949 |
| Establishments per 100,000 residents | 15.2 | 13.8 | 18.6 |
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 engineering services firms in Chicago, IL-IN
Of the engineering services firms in Chicago, IL-IN that had employees in March 2023, 51.5% had fewer than five (the U.S. share is 53.1%). 66.1% 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 | 737 | 51.5% | 53.1% |
| 5–9 employees | 209 | 14.6% | 15.0% |
| 10–19 employees | 186 | 13.0% | 13.1% |
| 20–49 employees | 164 | 11.5% | 11.3% |
| 50 or more employees | 135 | 9.4% | 7.6% |
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.
What engineering services firms in Chicago, IL-IN use the phone for
Engineering firms handle client calls, contractor questions and agency coordination, often while staff are in the field. Routing calls to the right project engineer saves time on every project.
Typical inbound and outbound calls for engineering services firms in Chicago, IL-IN:
- A municipal reviewer calls about comments.
- A contractor calls with a field question.
- A homeowner calls about a structural inspection.
Calls after closing time
Field issues sometimes need an after-hours callback; routine calls can wait until morning.
Business-hours routing in Callata sends calls to voicemail, a teammate's cell or an AI agent once the day ends, and voicemails arrive transcribed with an urgency flag.
Callata vs. per-seat pricing for engineering services firms in Chicago, IL-IN
The average engineering firm in Chicago, IL-IN has 19.9 employees, so a 20-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, 20 users on RingCentral RingEX Core cost $600.00 a month and 20 on Ooma Office Pro cost $499.00. On Callata the same 20 people cost $399.00 a month, less than either per-seat plan.
The annual difference against RingCentral's monthly list price comes to $2,412. 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 | $399.00 | $4,788.00 |
| Quo (Starter) | $19.00 per user | $380.00 | $4,560.00 |
| Nextiva (Core) | $23.00 per user | $460.00 | $5,520.00 |
| Ooma (Office Pro) | $24.95 per user | $499.00 | $5,988.00 |
| Dialpad (Standard) | $27.00 per user | $540.00 | $6,480.00 |
| RingCentral (RingEX Core) | $30.00 per user | $600.00 | $7,200.00 |
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 Chicago, IL-IN
NANPA records place the exchanges of the area's named cities and towns in 8 area codes. 630 has the most, with 778 of 3,886 exchanges (20%). 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 |
|---|---|---|---|---|
| 630 | 778 | Central | 1996 | 331 |
| 847 | 766 | Central | 1996 | 224 |
| 708 | 748 | Central | 1989 | 464 |
| 224 | 581 | Central | 2002 | 847 |
| 219 | 369 | Eastern and Central | 1948 | none |
| 815 | 292 | Central | 1947 | 779 |
| 331 | 224 | Central | 2007 | 630 |
| 779 | 128 | Central | 2007 | 815 |
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 engineering services firms in Chicago, IL-IN get with Callata
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.
If you already have a number in Chicago, IL-IN, 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 engineering services firms are there in Chicago, IL-IN?
Census County Business Patterns counted 1,434 engineering services firms in the Chicago-Naperville-Elgin, IL-IN metro area in 2023. They employed 28,500 people in mid-March.
What does a business phone system cost for a 20-person engineering firm?
At month-to-month list prices checked September 28, 2026, 20 users cost $600.00 a month on RingCentral RingEX Core and $499.00 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $399.00.
What area code should an engineering firm in Chicago, IL-IN use?
Area code 630 has the most assigned exchanges among the area's named places, followed by 847 and 708. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for an engineering 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.