# List of companies with a mobile app in Maryland

Tamtam tracks 49 companies with a mobile app headquartered in Maryland. This list ranks all of them by number of employees on LinkedIn, led by Marriott International, Under Armour and Hughes. Their median headcount is 532. Half of them were founded in 1977 or later. The most common headquarters are Baltimore (13), Bethesda (7) and Columbia (4).

The companies with mobile apps in Maryland are large organizations. Many are in hospitality, such as Marriott International, which manages 9,000 hotels worldwide, Aloft Hotels, offering contemporary spaces, and AC Hotels by Marriott, focusing on essential urban experiences. Other sectors include retail with Under Armour, designing performance apparel, and Royal Farms, operating over 240 stores. Hughes provides broadband equipment and services, while WSSC Water is a leading water utility. This selection of companies highlights a concentration of hospitality businesses, particularly around Bethesda. Many of these organizations, like MedStar Union Memorial Hospital, founded in 1854, and WSSC Water, established in 1918, have a long history, indicating well-established operations in the region.

🇺🇸 Maryland · 49 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Marriott International](https://www.tamtam.ai/c/marriott-international-bethesda) (marriott.com)<br>Management and operation of approximately 9,000 hotels and resorts across more than 30 brands in 141 countries worldwide. | Hospitality | 🇺🇸 Bethesda | 240,261 |  |
| 2 | [Under Armour](https://www.tamtam.ai/c/under-armour) (underarmour.com)<br>Design and develop innovative performance apparel, footwear, and gear focused on enhancing athletes' training, competition, and recovery experiences. | Retail Apparel and Fashion | 🇺🇸 Baltimore | 13,004 | 1996 |
| 3 | [Hughes](https://www.tamtam.ai/c/hughes) (hughes.com)<br>Provides broadband equipment, services, and network operations to millions of consumers, businesses, and governments worldwide via satellite and multi-transport technologies. | Telecommunications | 🇺🇸 Germantown | 3,209 | 1971 |
| 4 | [Aloft Hotels](https://www.tamtam.ai/c/aloft-hotels) (aloft-hotels.marriott.com)<br>Aloft hotels offer unique, contemporary spaces with vibrant social scenes and innovative programming for the next generation of global travelers | Hospitality | 🇺🇸 Bethesda | 3,090 | 2007 |
| 5 | [Royal Farms](https://www.tamtam.ai/c/royal-farms) (royalfarms.com)<br>Operating over 240 stores on the East Coast, this company offers fresh foods, dairy products, convenience items, and gasoline products | Retail | 🇺🇸 Baltimore | 2,814 |  |
| 6 | [AC Hotels by Marriott](https://www.tamtam.ai/c/ac-hotels-by-marriott) (ac-hotels.marriott.com)<br>AC Hotels by Marriott offers stylish, modern accommodations with a focus on essentials, European-inspired breakfast, flexible dining options, and a unique urban experience for travelers worldwide | Hospitality | 🇺🇸 Bethesda | 2,570 | 1988 |
| 7 | [Choice Hotels International](https://www.tamtam.ai/c/choice-hotels-international) (choicehotels.com)<br>Global lodging franchisor managing 22 brands across upscale and midscale segments, supporting thousands of hotels and offering a rewards program for travelers. | Hospitality | 🇺🇸 North Bethesda | 2,000 |  |
| 8 | [Mariner Finance](https://www.tamtam.ai/c/mariner-finance) (marinerfinance.com)<br>A consumer finance company offering creative, flexible, and convenient lending options with a focus on superior customer service and community relationships | Financial Services | 🇺🇸 Nottingham | 1,729 | 2002 |
| 9 | [WSSC Water](https://www.tamtam.ai/c/wssc-water) (wsscwater.com)<br>A leading water and wastewater utility established in 1918, serving 19 million residents with a vast network of pipelines meeting federal standards | Utilities | 🇺🇸 Laurel | 1,448 | 1918 |
| 10 | [Live! Casino & Hotel Maryland](https://www.tamtam.ai/c/live-casino-and-hotel-maryland) (livech.com)<br>A large commercial casino & hotel offering a variety of gaming options, luxury accommodations, dining choices, event venues, and entertainment experiences | Gambling Facilities and Casinos | 🇺🇸 Hanover | 1,334 | 2012 |
| 11 | [SAGE Dining Services](https://www.tamtam.ai/c/sage-dining-services) (sagedining.com)<br>Established in 1990, this company provides campus dining and upscale catering services to independent schools and private colleges, emphasizing great food, nutrition, and sustainability | Food and Beverage Services | 🇺🇸 Lutherville | 1,332 | 1990 |
| 12 | [MedStar Franklin Square Medical Center](https://www.tamtam.ai/c/medstar-franklin-square-medical-center) (medstarhealth.org)<br>A top community teaching hospital providing leading-edge medical services, recognized for excellence in nursing and quality care Contact for appointments | Hospitals and Health Care | 🇺🇸 Baltimore | 1,190 | 1898 |
| 13 | [Brivo](https://www.tamtam.ai/c/brivo) (brivo.com)<br>A global leader in cloud-based access control technology for commercial real estate, multifamily residential buildings, and large enterprises | IT Services and IT Consulting | 🇺🇸 Bethesda | 1,147 | 1999 |
| 14 | [CALVERT COUNTY PUBLIC SCHOOLS](https://www.tamtam.ai/c/calvert-county-public-schools) (calvertnet.k12.md.us)<br>A public school system in Calvert County, Maryland, educating over 16,000 students in 24 schools with a focus on excellence and collaboration | Primary and Secondary Education | 🇺🇸 Prince Frederick | 1,102 |  |
| 15 | [MedStar Union Memorial Hospital](https://www.tamtam.ai/c/medstar-union-memorial-hospital) (medstarhealth.org)<br>A leading not-for-profit acute care teaching hospital specializing in cardiac care, orthopaedics, sports medicine, and various outpatient services in Maryland | Hospitals and Health Care | 🇺🇸 Baltimore | 910 | 1854 |
| 16 | [Glory Days Grill](https://www.tamtam.ai/c/glory-days-grill) (glorydaysgrill.com)<br>A family restaurant chain offering affordable prices, sports-themed atmosphere, award-winning menus, large screen TVs, catering services, and private banquet facilities | Restaurants | 🇺🇸 Gaithersburg | 869 | 1996 |
| 17 | [citizenM hotels](https://www.tamtam.ai/c/citizenm-hotels) (marriott.com)<br>An integrated hotel brand catering to modern urban travellers, offering stylish, affordable accommodations in prime city locations with high profitability | Hospitality | 🇺🇸 Bethesda | 831 | 2006 |
| 18 | [Bethesda Game Studios](https://www.tamtam.ai/c/bethesda-game-studios) (bethesdagamestudios.com)<br>Award-winning game development team known for creating groundbreaking titles like The Elder Scrolls and Fallout series, with multiple 'Game of the Year' awards | Computer Games | 🇺🇸 Rockville | 770 | 2001 |
| 19 | [Baltimore Ravens](https://www.tamtam.ai/c/baltimore-ravens) (baltimoreravens.com)<br>An NFL team with multiple Super Bowl wins, a commitment to diversity, community service, and a mission to win games while serving fans | Spectator Sports | 🇺🇸 Owings Mills | 759 | 1996 |
| 20 | [The Y in Central Maryland](https://www.tamtam.ai/c/the-y-in-central-maryland) (ymaryland.org)<br>A cause-driven organization offering diverse professionals meaningful careers to inspire others and make a positive impact on the community | Wellness and Fitness Services | 🇺🇸 Baltimore | 748 | 1853 |
| 21 | [Sandy Spring Bank](https://www.tamtam.ai/c/sandy-spring-bank) (atlanticunionbank.com)<br>A premier community bank in the Greater Washington, DC region offering commercial and retail banking, mortgage, wealth management, and trust services | Banking | 🇺🇸 Olney | 685 | 1868 |
| 22 | [Columbia Association](https://www.tamtam.ai/c/columbia-association) (columbiaassociation.org)<br>A non-profit service corporation managing a master planned community in Columbia, MD, providing recreational, cultural, and community services while enhancing overall quality of life | Wellness and Fitness Services | 🇺🇸 Columbia | 666 | 1966 |
| 23 | [Ahmadiyya Muslim Community](https://www.tamtam.ai/c/ahmadiyya-muslim-community) (alislam.org)<br>A not-for-profit religious entity associated with the Ahmadiyya Muslim Community | Religious Institutions | 🇺🇸 Silver Spring | 633 | 1889 |
| 24 | [Tower Federal Credit Union](https://www.tamtam.ai/c/tower-federal-credit-union) (towerfcu.org)<br>Member-owned financial institution offering a variety of products and services, with headquarters in Maryland and serving over 210,000 members worldwide through branches and digital banking | Financial Services | 🇺🇸 Laurel | 622 | 1953 |
| 25 | [SECU Credit Union](https://www.tamtam.ai/c/secu-credit-union) (linktr.ee)<br>Maryland's largest credit union, offering financial services, customer support, and community outreach like scholarships and financial education, with many locations and online banking. | Financial Services | 🇺🇸 Linthicum | 532 | 1951 |
| 26 | [Bach to Rock: America's Music School](https://www.tamtam.ai/c/bach-to-rock-america-s-music-school) (bachtorock.com)<br>Music school offering unique method combining individual lessons with band instruction, jam sessions, Battles of the Bands, recording studios, and public concerts to cultivate musicianship | Primary and Secondary Education | 🇺🇸 Bethesda | 514 | 2007 |
| 27 | [First Home Mortgage](https://www.tamtam.ai/c/first-home-mortgage) (firsthome.com)<br>A mortgage corporation offering home loan services in 21 states, with a focus on superior customer service and empowering employees for innovative ideas | Financial Services | 🇺🇸 Baltimore | 508 | 1990 |
| 28 | [Carey International](https://www.tamtam.ai/c/carey-international) (carey.com)<br>Innovative global ground transportation solutions since 1921, offering chauffeured services, enterprise management, logistics, technology, and preferred partner programs across 1000+ cities worldwide | Ground Passenger Transportation | 🇺🇸 Frederick | 504 | 1921 |
| 29 | [Volo Sports](https://www.tamtam.ai/c/volo-sports) (volosports.com)<br>A company based in Baltimore offering adults sports, fitness, social activities, and volunteer opportunities while supporting free youth sports programs nationwide | Spectator Sports | 🇺🇸 Baltimore | 495 | 2014 |
| 30 | [MedStar Good Samaritan Hospital](https://www.tamtam.ai/c/medstar-good-samaritan-hospital) (medstarhealth.org)<br>A specialty healthcare provider offering a range of services including rehabilitation, orthopaedics, gynecology, pediatrics, emergency care, screenings, nursing, and senior living options | Hospitals and Health Care | 🇺🇸 Baltimore | 482 | 1968 |
| 31 | [IUEC - International Union of Elevator Constructors](https://www.tamtam.ai/c/iuec-international-union-of-elevator-constructors) (iuec.org)<br>The company represents over 27,000 skilled elevator constructors in the US and Canada, shaping skylines and keeping nations moving | Public Safety | 🇺🇸 Columbia | 446 | 1901 |
| 32 | [AOPA](https://www.tamtam.ai/c/aopa) (aopa.org)<br>The company is the largest aviation community, providing media, technology, advocacy, and services to pilots worldwide, promoting the freedom of flight | Airlines and Aviation | 🇺🇸 Frederick | 434 | 1939 |
| 33 | [MedStar St. Mary's Hospital](https://www.tamtam.ai/c/medstar-st-mary-s-hospital) (medstarhealth.org)<br>A 103-bed full-service community hospital in Maryland offering state-of-the-art emergency, inpatient, and outpatient care with a focus on excellence and compassionate medical care | Hospitals and Health Care | 🇺🇸 Leonardtown | 415 | 1912 |
| 34 | [U.S. Consumer Product Safety Commission](https://www.tamtam.ai/c/u-s-consumer-product-safety-commission) (cpsc.gov)<br>An organization dedicated to protecting the public from risks of injury or death from consumer products through regulation and safety measures | Public Safety | 🇺🇸 Bethesda | 412 | 1972 |
| 35 | [Merritt Clubs](https://www.tamtam.ai/c/merritt-clubs) (merrittclubs.com)<br>A Maryland-based fitness company focused on creating customized facilities and programs to support overall well-being and build a healthier community | Wellness and Fitness Services | 🇺🇸 Baltimore | 405 | 1977 |
| 36 | [TV One](https://www.tamtam.ai/c/tv-one) (tvone.tv)<br>TV One offers original programming, classic series, movies, and music for African American viewers, reaching millions of households through TV and HD channels | Broadcast Media Production and Distribution | 🇺🇸 Silver Spring | 392 |  |
| 37 | [Welldoc](https://www.tamtam.ai/c/welldoc) (welldoc.com)<br>The company offers BlueStar, an in-app digital assistant for type 2 diabetes to drive down costs and promote personal healthcare transformation | Hospitals and Health Care | 🇺🇸 Columbia | 391 | 2005 |
| 38 | [Travel Center Of America](https://www.tamtam.ai/c/travel-center-of-america) (tatravelcenters.com)<br>A food & beverages company located in Baltimore, Maryland, specializing in offering services to travelers at their center | Food and Beverage Services | 🇺🇸 Baltimore | 370 |  |
| 39 | [Howard Bank](https://www.tamtam.ai/c/howard-bank) (fnb-online.com)<br>The company values personal connections and outstanding service to help individuals and communities build dreams and legacies | Banking | 🇺🇸 Baltimore | 352 | 2004 |
| 40 | [Atlas Restaurant Group](https://www.tamtam.ai/c/atlas-restaurant-group) (atlasrestaurantgroup.com)<br>A national hospitality group with 34 restaurants across multiple states, focusing on authentic cuisine, impeccable service, and entertainment Employs over 2,000 people | Restaurants | 🇺🇸 Baltimore | 349 | 2014 |
| 41 | [Shore United Bank](https://www.tamtam.ai/c/shore-united-bank) (shoreunitedbank.com)<br>A full-service community bank with over a billion in assets, offering innovative financial services, digital banking, and trust management | Banking | 🇺🇸 Easton | 343 | 1876 |
| 42 | [MTA Maryland](https://www.tamtam.ai/c/mta-maryland) (mta.maryland.gov)<br>State-operated agency providing Local Bus, Light Rail, Metro Subway, Commuter Bus, and Mobility paratransit services throughout the Baltimore-Washington region and statewide technical support. | Government Administration | 🇺🇸 Baltimore | 331 | 1972 |
| 43 | [Vectorworks](https://www.tamtam.ai/c/vectorworks) (vectorworks.net)<br>A global leader in design and BIM software for architecture, landscape, and entertainment industries, providing one-platform solutions for collaborative project lifecycle management | Software Development | 🇺🇸 Columbia | 322 | 1985 |
| 44 | [Shoppers Supermarket](https://www.tamtam.ai/c/shoppers-supermarket) (shoppersfood.com)<br>A full-service supermarket offering everyday low prices, quality meat, produce, deli items, seafood, and hot foods while supporting local communities | Retail Groceries | 🇺🇸 Bowie | 314 | 1949 |
| 45 | [NASA Federal Credit Union](https://www.tamtam.ai/c/nasa-federal-credit-union) (nasafcu.com)<br>Offers financial services and career opportunities, including competitive salaries, benefits, and professional development programs to its employees and members. | Financial Services | 🇺🇸 Upper Marlboro | 303 | 1949 |
| 46 | [Keany Produce & Gourmet](https://www.tamtam.ai/c/keany-produce-and-gourmet) (keanyproduce.com)<br>A long-standing produce distributor with a commitment to quality, service, and sustainability, offering a wide range of products and services to customers in multiple states | Food and Beverage Services | 🇺🇸 Hyattsville | 256 | 1978 |
| 47 | [SemaConnect](https://www.tamtam.ai/c/semaconnect) (blinkcharging.com)<br>The company specializes in providing complete EV charging solutions for commercial, multifamily residents, fleet, and property owners with reliable performance and industry-best uptime | Motor Vehicle Manufacturing | 🇺🇸 Bowie | 47 | 2008 |
| 48 | [SkyPoint Federal Credit Union](https://www.tamtam.ai/c/skypoint-federal-credit-union) (skypointfcu.com)<br>A premier financial institution offering a wide array of services in Maryland, Virginia, and DC, prioritizing member needs, financial integrity, and value | Financial Services | 🇺🇸 Germantown | 37 | 1968 |
| 49 | [Unit-e Technologies](https://www.tamtam.ai/c/unit-e-technologies) (unitetechno.com)<br>Technology development studio specialized in arcade design, electronics fabrication, interactive games, and lighting solutions Notable products include videmption games, music games, and unique displays | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Halethorpe | 2 | 2011 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in Maryland

- [The largest companies in Maryland](https://www.tamtam.ai/l/largest-companies-maryland) (1,688)
- [Multinational companies in Maryland](https://www.tamtam.ai/l/multinational-companies-maryland) (216)
- [IT Services and IT Consulting companies in Maryland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-maryland) (189)
- [IT services companies in Maryland](https://www.tamtam.ai/l/it-services-companies-maryland) (179)
- [Professional services firms in Maryland](https://www.tamtam.ai/l/professional-services-firms-maryland) (176)
- [Education providers in Maryland](https://www.tamtam.ai/l/education-companies-maryland) (151)
- [Hospitals and Health Care companies in Maryland](https://www.tamtam.ai/l/hospitals-and-health-care-companies-maryland) (114)
- [Consulting firms in Maryland](https://www.tamtam.ai/l/consulting-firms-maryland) (112)
- [Companies with in-house R&D in Maryland](https://www.tamtam.ai/l/r-and-d-companies-maryland) (107)
- [Healthcare providers in Maryland](https://www.tamtam.ai/l/healthcare-providers-maryland) (105)
- [Critical infrastructure operators in Maryland](https://www.tamtam.ai/l/critical-infrastructure-operators-maryland) (94)
- [Retail chains in Maryland](https://www.tamtam.ai/l/retail-chains-maryland) (91)
- [Public sector organisations in Maryland](https://www.tamtam.ai/l/public-sector-organisations-maryland) (91)
- [Financial services firms in Maryland](https://www.tamtam.ai/l/financial-services-firms-maryland) (88)
- [Aerospace and defence companies in Maryland](https://www.tamtam.ai/l/aerospace-and-defense-companies-maryland) (80)
- [Construction companies in Maryland](https://www.tamtam.ai/l/construction-companies-maryland) (80)
- [Manufacturers in Maryland](https://www.tamtam.ai/l/manufacturers-maryland) (75)
- [Financial Services companies in Maryland](https://www.tamtam.ai/l/financial-services-companies-maryland) (65)
- [Government Administration companies in Maryland](https://www.tamtam.ai/l/government-administration-companies-maryland) (61)
- [Higher Education companies in Maryland](https://www.tamtam.ai/l/higher-education-companies-maryland) (54)
- [Hardware manufacturers in Maryland](https://www.tamtam.ai/l/hardware-companies-maryland) (53)
- [Research institutes in Maryland](https://www.tamtam.ai/l/research-institutes-maryland) (52)
- [SaaS companies in Maryland](https://www.tamtam.ai/l/saas-companies-maryland) (52)
- [AI companies in Maryland](https://www.tamtam.ai/l/ai-companies-maryland) (48)

## The same list elsewhere in United States

- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Companies with a mobile app in New York State](https://www.tamtam.ai/l/companies-with-mobile-app-new-york-state) (491)
- [Companies with a mobile app in Texas](https://www.tamtam.ai/l/companies-with-mobile-app-texas) (366)
- [Companies with a mobile app in Florida](https://www.tamtam.ai/l/companies-with-mobile-app-florida) (284)
- [Companies with a mobile app in Illinois](https://www.tamtam.ai/l/companies-with-mobile-app-illinois) (178)
- [Companies with a mobile app in Massachusetts](https://www.tamtam.ai/l/companies-with-mobile-app-massachusetts) (159)
- [Companies with a mobile app in Alabama](https://www.tamtam.ai/l/companies-with-mobile-app-alabama) (156)
- [Companies with a mobile app in Pennsylvania](https://www.tamtam.ai/l/companies-with-mobile-app-pennsylvania) (130)
- [Companies with a mobile app in Washington State](https://www.tamtam.ai/l/companies-with-mobile-app-washington-state) (128)
- [Companies with a mobile app in Georgia](https://www.tamtam.ai/l/companies-with-mobile-app-georgia) (117)
- [Companies with a mobile app in Ohio](https://www.tamtam.ai/l/companies-with-mobile-app-ohio) (114)
- [Companies with a mobile app in New Jersey](https://www.tamtam.ai/l/companies-with-mobile-app-new-jersey) (113)
- [Companies with a mobile app in Colorado](https://www.tamtam.ai/l/companies-with-mobile-app-colorado) (100)
- [Companies with a mobile app in North Carolina](https://www.tamtam.ai/l/companies-with-mobile-app-north-carolina) (96)
- [Companies with a mobile app in Michigan](https://www.tamtam.ai/l/companies-with-mobile-app-michigan) (95)
- [Companies with a mobile app in Virginia](https://www.tamtam.ai/l/companies-with-mobile-app-virginia) (93)
- [Companies with a mobile app in Arizona](https://www.tamtam.ai/l/companies-with-mobile-app-arizona) (87)
- [Companies with a mobile app in Minnesota](https://www.tamtam.ai/l/companies-with-mobile-app-minnesota) (84)
- [Companies with a mobile app in Missouri](https://www.tamtam.ai/l/companies-with-mobile-app-missouri) (78)
- [Companies with a mobile app in Utah](https://www.tamtam.ai/l/companies-with-mobile-app-utah) (78)
- [Companies with a mobile app in New York](https://www.tamtam.ai/l/companies-with-mobile-app-new-york) (371)
- [Companies with a mobile app in San Francisco](https://www.tamtam.ai/l/companies-with-mobile-app-san-francisco) (238)
- [Companies with a mobile app in Los Angeles](https://www.tamtam.ai/l/companies-with-mobile-app-los-angeles) (81)

## The same list elsewhere

- [Companies with a mobile app in the world](https://www.tamtam.ai/l/companies-with-mobile-app-in-the-world) (18,922)

---

Source: https://www.tamtam.ai/l/companies-with-mobile-app-maryland