> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/541511/pennsylvania/ # NAICS 541511 companies in Pennsylvania Companies with NAICS code 541511 (Custom Computer Programming Services) headquartered in Pennsylvania, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 541511 companies in Pennsylvania by headcount range include Mastech Digital, Accion Labs and Vertex. NAICS 541511 is the code for Custom Computer Programming Services. Among those counted, they are mostly very small: 52% have 50 or fewer employees. ## Which NAICS 541511 companies are in Pennsylvania? The biggest by headcount range include Mastech Digital, Accion Labs, Vertex, Avasoft and Truecommerce. NAICS 541511 is the code for Custom Computer Programming Services. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | Mastech Digital | Moon Township | 1,001 to 5,000 | | Accion Labs | Bridgeville | 1,001 to 5,000 | | Vertex | King Of Prussia | 1,001 to 5,000 | | Avasoft | Blue Bell | 1,001 to 5,000 | | Truecommerce | Cranberry Township | 1,001 to 5,000 | | Data-Core Systems | Bristol | 1,001 to 5,000 | | Genzeon | Exton | 501 to 1,000 | | Spruce Infotech | Exton | 501 to 1,000 | | Cogent Infotech | Pittsburgh | 501 to 1,000 | | Cerebra Consulting | Malvern | 501 to 1,000 | | Suvoda | Conshohocken | 501 to 1,000 | | Karya Technologies | Blue Bell | 501 to 1,000 | | Intepros | Plymouth Meeting | 201 to 500 | | Noblesoft Solutions | Langhorne | 201 to 500 | | Autosoft Dms | West Middlesex | 201 to 500 | | Scala | Malvern | 201 to 500 | | Medecision | King Of Prussia | 201 to 500 | | Healthverity | Philadelphia | 201 to 500 | | Teletracking | Pittsburgh | 201 to 500 | | Greenphire | King Of Prussia | 201 to 500 | | Atorus | Newtown Square | 201 to 500 | | Grant Street Group | Pittsburgh | 201 to 500 | | Summa Technologies | Pittsburgh | 201 to 500 | | Qnovate | Exton | 201 to 500 | | Softerware | Fort Washington | 201 to 500 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Which cities in Pennsylvania? Within Pennsylvania, Pittsburgh (18%), Philadelphia (14%) and Exton (5%) are the most common headquarters. **Figure: Cities of NAICS 541511 companies in Pennsylvania.** Bars for the share of counted NAICS 541511 companies in Pennsylvania headquartered in each city: Pittsburgh 18%, Philadelphia 14%, Exton 5%, King Of Prussia 5%, Malvern 4%, Wayne 4%, Mechanicsburg 3%, West Chester 3%. *Share of counted NAICS 541511 companies in Pennsylvania by headquarters city.* ## How big are they? 52% of the NAICS 541511 companies counted in Pennsylvania have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 541511 companies in Pennsylvania.** Seven columns for the share of counted NAICS 541511 companies in Pennsylvania in each employee range: 11 to 50 52%, 51 to 200 31%, 201 to 500 10%, 501 to 1,000 4%, 1,001 to 5,000 4%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted NAICS 541511 companies in Pennsylvania in each employee range.* ## How old are they? Most were founded in the 2010s (39%), then the 2000s (30%). **Figure: When NAICS 541511 companies in Pennsylvania were founded.** Eight columns for the share of counted NAICS 541511 companies in Pennsylvania founded in each era: Before 1960 0%, 1960s 1%, 1970s 2%, 1980s 8%, 1990s 20%, 2000s 30%, 2010s 39%, 2020s 2%. *Share of counted NAICS 541511 companies in Pennsylvania by the era they were founded in, for the ones that list a founding year.* ## How Pennsylvania compares with the rest of the country - 41% were founded in 2010 or later, against 51% across NAICS 541511 companies nationwide. ## Which SIC codes do they carry? The older SIC system and NAICS do not line up one to one. These are the SIC codes seen most here. **Figure: SIC codes of NAICS 541511 companies in Pennsylvania.** Bars for the share of counted NAICS 541511 companies in Pennsylvania with each code: 7371 83%, 5045 3%, 7379 3%. *Share of counted NAICS 541511 companies in Pennsylvania by their SIC code.* ## How do you reach the people at these Pennsylvania companies? The people to talk to are usually engineering, delivery and revenue leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 541511 in Pennsylvania ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the engineering, delivery and revenue leaders at companies with NAICS code 541511 in Pennsylvania, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/). About the place: [companies in Pennsylvania](https://enrich.chat/companies-in/pennsylvania/). NAICS 541511 in other states: [California](https://enrich.chat/naics/541511/california/)[Texas](https://enrich.chat/naics/541511/texas/)[New York](https://enrich.chat/naics/541511/new-york/)[Florida](https://enrich.chat/naics/541511/florida/)[Virginia](https://enrich.chat/naics/541511/virginia/)[New Jersey](https://enrich.chat/naics/541511/new-jersey/)[Massachusetts](https://enrich.chat/naics/541511/massachusetts/)[Georgia](https://enrich.chat/naics/541511/georgia/)[Illinois](https://enrich.chat/naics/541511/illinois/)[Washington](https://enrich.chat/naics/541511/washington/) Other NAICS codes in Pennsylvania: [NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/pennsylvania/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/pennsylvania/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/pennsylvania/)[NAICS 611110: Elementary and Secondary Schools](https://enrich.chat/naics/611110/pennsylvania/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/pennsylvania/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/pennsylvania/)[NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/pennsylvania/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/pennsylvania/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/pennsylvania/)[NAICS 523940: Portfolio Management and Investment](https://enrich.chat/naics/523940/pennsylvania/) ## Frequently asked questions ### Which NAICS 541511 companies are in Pennsylvania? The biggest by headcount range include Mastech Digital, Accion Labs, Vertex, Avasoft and Truecommerce. The page lists 25 with links to their profiles where we have them. ### What is NAICS 541511? NAICS 541511 is the code for Custom Computer Programming Services, in sector 54: Professional, Scientific, and Technical Services. ### Which cities in Pennsylvania have the most? Pittsburgh (18%), Philadelphia (14%) and Exton (5%) lead among the companies counted. ## Try this prompt Find the people at NAICS 541511 companies in Pennsylvania ```text Use www.enrich.chat to find the engineering, delivery and revenue leaders at companies with NAICS code 541511 in Pennsylvania, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 541511 in California](https://enrich.chat/naics/541511/california/) - [NAICS 541511 in Texas](https://enrich.chat/naics/541511/texas/) - [NAICS 541511 in New York](https://enrich.chat/naics/541511/new-york/) - [NAICS 541511 in Florida](https://enrich.chat/naics/541511/florida/) - [NAICS 541512 in Pennsylvania](https://enrich.chat/naics/541512/pennsylvania/) - [NAICS 524210 in Pennsylvania](https://enrich.chat/naics/524210/pennsylvania/) - [NAICS 541110 in Pennsylvania](https://enrich.chat/naics/541110/pennsylvania/) - [NAICS 611110 in Pennsylvania](https://enrich.chat/naics/611110/pennsylvania/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)