These Ontario-based companies are primarily established design services firms, many of which have been operating for several decades. They offer a broad range of specialized services, from engineering and architectural design to digital marketing and product development.
Key players include Smith + Andersen, an integrated engineering firm, and H.H. Angus & Associates Ltd., which provides consulting engineering services. JLR offers multidisciplinary engineering, architecture, and planning, while Umbra designs and distributes homeware products globally. WalterFedy is an integrated design team of architects and engineers, and Freelance, self-employed provides services for home offices. The data shows a strong concentration of these firms in Toronto, with several others located in Ottawa, Kitchener, Mississauga, and Markham.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Freelance, self-employedjobicy.com
A company dedicated to providing services and solutions for home offices, catering to the needs of remote workers and independent professionals |
1,245 | |||
| 2 |
Smith + Andersensmithandandersen.com
One of Canada's leading integrated engineering firms, specializing in creative, quality designs with a commitment to sustainability and innovation |
659 | |||
| 3 |
H.H. Angus & Associates Ltd.hhangus.com
Provider of consulting engineering services to institutional, commercial, and industrial sectors, with expertise in energy generation, technology, project management, and operational consulting |
557 | |||
| 4 |
MyOwn Marketingmyownmarketing.agency
This company specializes in digital marketing services for restaurants, including a tool to enhance Google reviews and increase customer traffic |
556 | |||
| 5 |
JLRjlrichards.ca
A multidisciplinary practice offering integrated services in engineering, architecture, planning, and project management, focusing on cost-effective and coordinated designs |
535 | |||
| 6 | 346 | ||||
| 7 |
WalterFedywalterfedy.com
An award-winning, integrated design team of architects and engineers dedicated to excellence, sustainability, and creating rewarding careers for employees |
324 | |||
| 8 |
The Central Groupcentralgrp.com
Design and manufacture of innovative retail merchandising solutions combining shopper research, packaging, displays, and operational excellence for maximum marketing impact. |
233 | |||
| 9 | 179 | ||||
| 10 |
Stone Tile Internationalstone-tile.com
A leading distributor of a wide range of premium tiles and materials, offering impeccable customer service and innovative design solutions nationwide |
157 | |||
| 11 |
Fidus Systemsfidus.com
Fidus specializes in electronic product development, offering services in hardware, software, FPGA, signal integrity, PCB layout, wireless, and mechanical design |
157 | |||
| 12 |
The HIDI Grouphidi.com
A global consultancy offering comprehensive building services through eight disciplines, committed to innovation, partnership, and creating safer, healthier, and more efficient buildings |
154 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 13 |
Mulvey & Bananimbii.com
The company provides innovative engineering services for electrical and electronic systems in new construction and renovation projects, specializing in Building Intelligence |
153 | |||
| 14 |
Ableablecreates.com
Company nurtures collaboration & thoughtful innovation with clients, providing creative resources from concept to production to bring ideas to life |
152 | |||
| 15 |
Envisionenvisioncreates.com
Specializing in fixture, wayfinding, and digital experience design, we provide end-to-end solutions for creating exceptional branded experiences for top North American companies |
58 | |||
| 16 | 35 | ||||
| 17 |
Design 1stdesign1st.com
Hardware product design firm with extensive experience, offering services in industrial design, engineering, electronics, software, and manufacturing setup to bring ideas to market successfully |
34 | |||
| 18 | 7 | ||||
| 19 |
Khayeri Flooringkhayericonstructor.com
Specializing in luxury engineered flooring, we provide custom and production builders with high-quality, design-inspired options that add beauty and value to any project |
7 | |||
| 20 | 3 | ||||
| 21 |
Unparallel Brand + Designunparallel.com
A full-service branding and marketing firm specializing in crafting authentic brand experiences to engage and inspire audiences across all touch points |
3 | |||
| 22 |
ABE Designabedesign.ca
The company provides engineering, CAD drafting, manufacturing, installation, and electrical & electronics services, including custom product design and certification Serving US & Canada |
3 | |||
| 23 | 2 | ||||
| 24 |
NOMA Marketingnomamarketing.com
A creative media agency that develops tailored marketing solutions to build and nurture brands, delivering excellence, innovation, and meaningful connections |
2 | |||
| 25 |
INsight Workspace Planningthebizdesigner.com
The company specializes in designing workspaces for mid to large-sized businesses, using data-driven programming and visionary solutions to support their vision and culture |
2 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 11, 2026.
More company lists in Ontario
- The largest companies in Ontario 5,032
- Multinational companies in Ontario 901
- Financial services firms in Ontario 396
- Manufacturers in Ontario 389
- Critical infrastructure operators in Ontario 344
- Retail chains in Ontario 327
- Companies with in-house R&D in Ontario 300
- Logistics companies in Ontario 285
- Education providers in Ontario 276
- SaaS companies in Ontario 275
- Truck Transportation companies in Ontario 270
- Transportation, Logistics, Supply Chain and Storage companies in Ontario 261
- Public sector organisations in Ontario 259
- Financial Services companies in Ontario 250
- IT Services and IT Consulting companies in Ontario 235
- Software Development companies in Ontario 231
- Healthcare providers in Ontario 226
- Hardware manufacturers in Ontario 213
- Professional services firms in Ontario 211
- Hospitals and Health Care companies in Ontario 205
- Distributors and wholesalers in Ontario 183
- Companies with a mobile app in Ontario 181
- Publicly traded companies in Ontario 156
- IT services companies in Ontario 156