IT companies in Houston: 4,174 small firms serving an industrial city, and how to pick one

Most people searching for IT companies in Houston want one to hire: a managed service provider for an office, a developer for an app, a partner for a plant or clinic. This page gives the federal count so you know the size of the field, then shows how the market splits, which lists name firms, how to choose one, and, for B2B sellers, how to prospect them.

Houston IT companies by the numbers

County Business Patterns (CBP), the Census Bureau's annual count of businesses with employees, puts 4,174 tech establishments in the Houston-Pasadena-The Woodlands, TX Metro Area (CBSA 26420) for 2023. Tech means four NAICS industry groups: software publishers (5112), computer systems design and related services (5415), data processing, hosting and related services (518) and other information services (5191).

Houston has more than half as many tech establishments as Dallas-Fort Worth (7,996) but a third of its tech employment (151,365). The difference is size.

Mostly very small firms

The Census Bureau withholds every size cell from 50 employees up for Houston to protect confidentiality, so the last row is the published total less the smaller cells. That gives 3,789 establishments with 1 to 19 employees and 385 with 20 or more. For a buyer, the practical field of providers big enough to cover a multi-site company around the clock is a few hundred, not four thousand.

What they do: integrators first

Systems design firms, which plan and integrate hardware, software and networks, are the largest group, but they average just seven employees each. The facilities management and other computer services firms, where many outsourced IT operators sit, are fewer but larger, at about 20 each. Software publishers number only 267. The Greater Houston Partnership's digital technology page describes the city's core industries of health care, energy and advanced manufacturing as "each highly precise, data rich, and undergoing massive digital transformations": those are the clients these firms are built around.

Harris County, Fort Bend and The Woodlands

Employee counts marked not reported carry the Census Bureau's high-noise flag: to protect confidentiality it changed them by 5% or more, so they're left out here.

Harris County has 64% of the establishments and 86% of the jobs. Fort Bend County, home to Sugar Land, has 888 establishments with 3,219 employees, under four each, which points to independent consultants and very small firms. Montgomery County, which includes The Woodlands, has 389. The rows total 4,160; 14 establishments are in counties not shown.

Public tech companies headquartered in the Houston area

Headquarters and revenue are from each company's latest 10-K. HPE and Applied Optoelectronics are classified as manufacturers, so they're outside the Census count above. The Greater Houston Partnership names its own notable digital tech employers: Cart.com, Liongard, BMC Software, HPE, Crown Castle, HighRadius, Improving and Softeq.

How to choose a Houston IT company

1. Match the firm to the job. Office IT, networks and managed services come from 541512 and 541513 firms; an app or integration from a 541511 programming firm. Industrial sites need a firm that has worked on plant or control networks, not just offices.
2. Check the name. Many small Houston firms trade under an assumed name. The Harris County Clerk's assumed name search covers filings since 1978 and shows who is behind a business name.
3. Count the people. With three in four local establishments under five employees, ask who covers your account when the lead engineer is out, and get it in writing.
4. Use public-sector vetting if it helps. Firms on Texas DIR cooperative contracts have been through the state's procurement process; cloud services that handle Texas state agency data must be certified under TX-RAMP, and DIR publishes the certified list.
5. Ask for references in your industry, ideally a client with the same compliance load as yours.

Lists that name Houston IT firms

Prospecting Houston IT companies

Selling to Houston tech firms means selling to small businesses. At the 3,789 establishments with fewer than 20 employees the owner buys, often within a week. The 385 with 20 or more have a service delivery or operations manager who owns tools and vendors; at the 182 with 50 or more, expect a security review. The good triggers here are a new DIR contract award, an energy or health system client announced on the firm's site, and hiring for field engineers.

Worked example: an OT security firm recruiting integrator partners

Illustrative example. The company, people and figures are fictional, to show the method.

Bayou Shield (bayoushield.example) assesses the security of operational technology, the control systems in plants and pipelines. Rather than sell to every plant itself, it partners with Houston integrators that already have industrial clients and resells through them.

• Establishments with 5 to 49 employees: 353 + 258 + 203 = 814.
• Systems design firms are 1,791 of 4,174 establishments (43%), so about 350 of those 814.
• Bayou Shield assumes 30% serve industrial or energy clients: about 105 partner prospects.
• Signing 8 partners that each bring two assessments a year gives 16 assessments without a direct sales team.

The hard part is finding which 105 integrators work in plants. Bebop takes "Houston IT integrators with 5 to 49 employees that serve refineries or chemical plants" and returns matching firms with the evidence for each.

Subject: OT security for [Company]'s plant clients

Hi [first name],

I saw [Company] supports [client type: refineries, terminals, chemical plants] on its site. Those clients are getting more questions about control system security, and most integrators your size don't want to staff a specialist for it.

We run the OT assessment under your name and hand your team the remediation work. Would a short call about how two other Houston partners set it up be useful?

[Your name], Bayou Shield

Reading the numbers

CBP counts establishments, single locations with at least one paid employee, for the week of March 12, 2023. A firm with offices in the Energy Corridor and The Woodlands counts twice, owner-only consultants aren't counted, and in-house IT teams at energy companies and hospitals count under their employers' industries. For the buyers themselves, see oil and gas companies in Houston.

Next step: find the owner or operations lead at each firm with how to find decision makers.