Business phone system for engineering services firms

Engineering services firms in the United States

County Business Patterns counted 63,233 engineering services firms in the U.S. in 2023 (NAICS 541330, Engineering Services). They employed 1,260,577 people in mid-March and paid $138.6 billion in annual payroll. The average establishment has 19.9 employees. That is 18.6 establishments for every 100,000 residents.

California has the most (8,898), followed by Texas (5,772), Florida (5,260), and New York (2,486). Relative to population, Wyoming leads with 40.5 per 100,000 residents, and Mississippi has the fewest at 11.2.

Why the phone matters for engineering services firms

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 engineering services firms commonly handle:

• A developer calls about a site plan.
• A contractor calls with a field question.
• A municipal reviewer calls about comments.
• The firm calls a client about a schedule.
• A homeowner calls about a structural inspection.

Texting and after-hours calls

Firms text site meeting times and document notifications.

Field issues sometimes need an after-hours callback; routine calls can wait until morning.

How big engineering services firms are

53.1% of U.S. engineering services firms with employees had fewer than five people in March 2023. 68.0% had fewer than ten. Most phone decisions in this industry are made for small teams, where one shared number and sensible routing matter more than a desk phone per person.

Engineering services firms by state

Establishment counts for the 51 states (and DC) where Census published a figure, with the rate per 100,000 residents.

Largest metro areas for engineering services firms

Census published engineering firm counts for 735 metro and micropolitan areas. The 25 largest:

Callata vs. per-seat pricing for engineering services firms in the U.S.

The average U.S. engineering firm has 19.9 employees, so the comparison uses a 20-person team. On a per-user plan that headcount sets the bill: $499.00 a month on Ooma Office Pro or $600.00 on RingCentral RingEX Core at list price (checked September 28, 2026). Callata comes to $399.00 a month for 20 users ($99 a month with 5 users included, then $20 per additional user), below both.

Over a year, that is $2,412 less than RingCentral for an engineering firm in the U.S. of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.

How Callata works for engineering 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.

Texting from a local number requires carrier registration (10DLC), a one-time $49 fee. Porting an existing number is free.

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.