CallataGuidesBusiness phone system for engineering services firms in Durham, NC
Engineering services firms in the Durham-Chapel Hill, NC metro area: 88 establishments in 2023, the local area codes, and what phone service costs a 28-person team.
- Establishments
- 88CBP 2023
- Employees
- 2,438mid-March 2023
- Per 100k residents
- 14.2U.S. 18.6
- Rank
- 118th of 735areas by count
Engineering services firms in Durham, NC by the numbers
The Census Bureau's 2023 County Business Patterns lists 88 establishments classified as Engineering Services (NAICS 541330) in the Durham-Chapel Hill, NC metro area. They employed 2,438 people in mid-March and paid $257.3 million in annual payroll. By establishment count the area is 118th out of 735 areas with published figures for engineering services firms.
Measured against its 621,000 residents (2024 estimate), the area has 14.2 engineering services firms per 100,000 people; the U.S. rate is 18.6, so Durham, NC is 23.7% below the national figure. The average establishment here has 27.7 employees, compared with 19.9 nationally. Payroll per employee comes to $105,537, 4.0% below the national $109,949.
| Measure | Durham, NC | North Carolina | United States |
|---|---|---|---|
| Establishments | 88 | 1,779 | 63,233 |
| Mid-March employees | 2,438 (moderate noise) | 31,540 | 1,260,577 |
| Annual payroll | $257,299,000 (moderate noise) | $3,147,971,000 | $138,599,619,000 |
| Employees per establishment | 27.7 | 17.7 | 19.9 |
| Payroll per employee | $105,537 | $99,809 | $109,949 |
| Establishments per 100,000 residents | 14.2 | 16.1 | 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.
How big engineering services firms in Durham, NC are
Of the engineering services firms in Durham, NC that had employees in March 2023, 66.7% had fewer than five (the U.S. share is 53.1%). 80.2% 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 | 54 | 66.7% | 53.1% |
| 5–9 employees | 11 | 13.6% | 15.0% |
| 10–19 employees | 7 | 8.6% | 13.1% |
| 20–49 employees | 9 | 11.1% | 11.3% |
| 50 or more employees | 0 | 0.0% | 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 Durham, NC 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.
Calls an engineering firm in Durham, NC might handle in a typical week include:
- A municipal reviewer calls about comments.
- The firm calls a client about a schedule.
- A developer calls about a site plan.
What engineering services firms text about
Firms text site meeting times and document notifications.
Because carriers require registration for business texting from local numbers, Callata files a 10DLC registration for a one-time $49; after approval, anyone on the team can reply from the business number.
Callata vs. per-seat pricing for engineering services firms in Durham, NC
The average engineering firm in Durham, NC has 27.7 employees, so a 28-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, 28 users on RingCentral RingEX Core cost $840.00 a month and 28 on Ooma Office Pro cost $698.60. Callata comes to $559.00 a month for 28 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $3,372 less than RingCentral for an engineering firm in Durham, NC 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 | $559.00 | $6,708.00 |
| Quo (Starter) | $19.00 per user | $532.00 | $6,384.00 |
| Nextiva (Core) | $23.00 per user | $644.00 | $7,728.00 |
| Ooma (Office Pro) | $24.95 per user | $698.60 | $8,383.20 |
| Dialpad (Standard) | $27.00 per user | $756.00 | $9,072.00 |
| RingCentral (RingEX Core) | $30.00 per user | $840.00 | $10,080.00 |
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 Durham, NC
NANPA records place the exchanges of the area's named cities and towns in 4 area codes. 919 has the most, with 226 of 313 exchanges (72%). A local number lets clients in Durham, NC 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 |
|---|---|---|---|---|
| 919 | 226 | Eastern | 1954 | 984 |
| 984 | 73 | Eastern | 2012 | 919 |
| 336 | 13 | Eastern | 1997 | 743 |
| 743 | 1 | Eastern | 2016 | 336 |
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 Durham, NC 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.
Porting a number you already use in Durham, NC 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 engineering services firms are there in Durham, NC?
Census County Business Patterns counted 88 engineering services firms in the Durham-Chapel Hill, NC metro area in 2023. They employed 2,438 people in mid-March.
What does a business phone system cost for a 28-person engineering firm?
At month-to-month list prices checked September 28, 2026, 28 users cost $840.00 a month on RingCentral RingEX Core and $698.60 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $559.00.
What area code should an engineering firm in Durham, NC use?
Area code 919 has the most assigned exchanges among the area's named places, followed by 984 and 336. 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.