# Top 50 Advertising Services companies in Ontario

Tamtam tracks 100 Advertising Services companies headquartered in Ontario. This list ranks the 50 largest by number of employees on LinkedIn, led by SHOP, Other.™ and Mosaic North America. Their median headcount is 173. Half of them were founded in 2005 or later. The most common headquarters are Toronto (36), Mississauga (5) and Oakville (3).

These companies in Ontario are primarily large advertising services firms. SHOP is an innovative marketplace for trendy products, while Other.™ specializes in paid media and performance creative. Mosaic North America is an integrated marketing agency with a 30-year history, and Klick is an independent commercialization partner for life sciences brands. WSI World is a global leader in digital marketing.

The data shows a strong concentration of these larger advertising services companies in Toronto, which hosts many headquarters, including those of Other.™, Mosaic North America, Klick, and Bond Brand Loyalty. Other significant hubs include Mississauga and Milton.

🇨🇦 Ontario · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [SHOP](https://www.tamtam.ai/c/shop) (searchfindorder.com)<br>Innovative marketplace offering a variety of trendy products including gadgets, electronics, home items, and automotive accessories for consumers seeking the latest trends | Advertising Services | 🇨🇦 Milton | 11,517 |  |
| 2 | [Other.™](https://www.tamtam.ai/c/other-toronto) (weareother.ca)<br>Specialized paid media and performance creative agency helping marketers optimize media spend, achieve targets, and outperform competition with proven methodologies and successful campaigns | Advertising Services | 🇨🇦 Toronto | 9,168 | 2015 |
| 3 | [Mosaic North America](https://www.tamtam.ai/c/mosaic-north-america) (mosaic.com)<br>An integrated marketing agency in North America, creating connected brand experiences using data-led insights, expertise in various areas, and a 30-year history | Advertising Services | 🇨🇦 Toronto | 2,946 |  |
| 4 | [LABORATORY](https://www.tamtam.ai/c/laboratory) (wearelaboratory.com)<br>A full-service agency creating innovative marketing solutions without boundaries, collaborating closely with forward-thinking brands to deliver impactful strategies and designs | Advertising Services | 🇨🇦 Toronto | 2,731 | 2016 |
| 5 | [Klick](https://www.tamtam.ai/c/klick) (klick.com)<br>An independent commercialization partner for life sciences brands, focused on developing, launching, and supporting brands to maximize market potential globally | Advertising Services | 🇨🇦 Toronto | 2,006 | 1997 |
| 6 | [WSI World](https://www.tamtam.ai/c/wsi-world) (wsiworld.com)<br>Global leader in digital marketing, providing tailored solutions to unlock potential for brands across various industries with over 25 years of experience | Advertising Services | 🇨🇦 Etobicoke | 1,174 | 1995 |
| 7 | [MaxBounty](https://www.tamtam.ai/c/maxbounty) (maxbounty.com)<br>A top CPA network focusing on maximizing client ROI, offering seamless global online marketing experiences for affiliates and advertisers | Advertising Services | 🇨🇦 Ottawa | 997 | 2004 |
| 8 | [LAUNCH!](https://www.tamtam.ai/c/launch) (launchthis.com)<br>A top Retail Activation agency in Canada, specializing in experiential, promotional, and interactive marketing campaigns that drive immediate and measurable results | Advertising Services | 🇨🇦 Mississauga | 644 | 1993 |
| 9 | [Bond Brand Loyalty](https://www.tamtam.ai/c/bond-brand-loyalty) (bondbl.com)<br>This company specializes in creating lasting relationships between people and brands through intelligent connections, engaging experiences, and advanced technology solutions globally | Advertising Services | 🇨🇦 Toronto | 640 | 1980 |
| 10 | [Diamond](https://www.tamtam.ai/c/diamond) (experiencediamond.com)<br>An independent and creative communications agency disrupting the industry by creating unique and impactful ideas that drive business growth and transformation | Advertising Services | 🇨🇦 Toronto | 558 | 2006 |
| 11 | [PATTISON Outdoor](https://www.tamtam.ai/c/pattison-outdoor) (pattisonoutdoor.com)<br>Provides comprehensive Out-of-Home advertising solutions, including digital and transit, with extensive market coverage and customer support across Canada. | Advertising Services | 🇨🇦 Mississauga | 513 |  |
| 12 | [SuperMarket](https://www.tamtam.ai/c/supermarket-toronto) (thesupermarketinc.com)<br>A strategic content agency crafting captivating strategies and content for global brands to drive engagement and growth | Advertising Services | 🇨🇦 Toronto | 487 | 2012 |
| 13 | [LoyaltyOne](https://www.tamtam.ai/c/loyaltyone) (loyalty.com)<br>A leading loyalty program in Canada with over 200 retailer brands, online retailers, and credit card partners, providing valuable shopper insights | Advertising Services | 🇨🇦 Toronto | 486 |  |
| 14 | [PUSH Media](https://www.tamtam.ai/c/push-media) (push.agency)<br>A performance marketing consultancy specializing in building measurable media and creative platforms using martech and AI technology, with a Zero-Waste™ philosophy | Advertising Services | 🇨🇦 Toronto | 477 | 2012 |
| 15 | [Brand Momentum](https://www.tamtam.ai/c/brand-momentum) (brandmomentum.ca)<br>Canada's largest independent Sales, Marketing, and Retail agency focused on authentic brand connections, remarkable programs, and employee well-being Recognized for excellence and growth | Advertising Services | 🇨🇦 Mississauga | 445 | 2009 |
| 16 | [CanadaX](https://www.tamtam.ai/c/canadax) (canadax.net)<br>A company that collaborates with Oracle to provide specialized services, products, and solutions related to Oracle's technology and software offerings | Advertising Services | 🇨🇦 Toronto | 369 |  |
| 17 | [SCS](https://www.tamtam.ai/c/scs) (wearescs.com)<br>This company delivers brand excitement through storytelling, amplifying moments, and creating emotional connections to enhance people's lives, driving lifelong consumer loyalty | Advertising Services | 🇨🇦 Toronto | 363 | 1985 |
| 18 | [Environics Analytics](https://www.tamtam.ai/c/environics-analytics) (environicsanalytics.com)<br>A leading marketing and analytical services company specializing in proprietary data, software, and consulting to help organizations understand customers and markets | Advertising Services | 🇨🇦 Toronto | 294 | 2003 |
| 19 | [The Hive](https://www.tamtam.ai/c/the-hive-toronto) (thehiveinc.com)<br>An independent, collaborative experiential agency specializing in driving commercial growth for clients through inventive and strategic touchpoint opportunities since 1994 | Advertising Services | 🇨🇦 Toronto | 293 |  |
| 20 | [illumin](https://www.tamtam.ai/c/illumin) (illumin.com)<br>A leading advertising technology firm empowering marketers with an omnichannel journey automation platform for smarter targeting and communication with online consumers | Advertising Services | 🇨🇦 Toronto | 232 | 2009 |
| 21 | [Bensimon Byrne](https://www.tamtam.ai/c/bensimon-byrne) (bensimonbyrne.com)<br>A strategic and creative advertising agency focused on building brands, driving growth, and impacting culture through talent, decency, and consumer-first mindset | Advertising Services | 🇨🇦 Toronto | 232 | 1993 |
| 22 | [KSG](https://www.tamtam.ai/c/ksg-toronto) (knewsales.com)<br>A team of experts specializing in Experiential Sales™ programs to drive customer acquisition, with a focus on delivering measurable results for clients | Advertising Services | 🇨🇦 Toronto | 180 | 2003 |
| 23 | [UM Canada](https://www.tamtam.ai/c/um-canada) (umww.ca)<br>A strategic media agency providing innovative solutions through the power of Better Science and Better Art to drive growth for brands | Advertising Services | 🇨🇦 Toronto | 176 | 2010 |
| 24 | [Embr](https://www.tamtam.ai/c/embr) (embrevents.com)<br>This national experiential marketing agency specializes in creating memorable brand campaigns through fair practices, transparency, and a friendly corporate culture | Advertising Services | 🇨🇦 Toronto | 173 | 2013 |
| 25 | [The Kitchen North America](https://www.tamtam.ai/c/the-kitchen-north-america) (kraftheinz.com)<br>In-house agency for Kraft Heinz focused on innovative marketing strategies, creativity, and collaboration to elevate iconic brands | Advertising Services | 🇨🇦 Toronto | 173 | 2021 |
| 26 | [OMD Canada](https://www.tamtam.ai/c/omd-canada) (omd.com)<br>A global media network that combines innovation, creativity, empathy, and evidence to help clients make better decisions and achieve profitable business outcomes | Advertising Services | 🇨🇦 Toronto | 172 |  |
| 27 | [INNOCEAN Canada](https://www.tamtam.ai/c/innocean-canada) (innocean.ca)<br>A full-service advertising agency founded in 2009, with over 130 employees in Toronto and Montreal, working with renowned brands | Advertising Services | 🇨🇦 Toronto | 166 | 2009 |
| 28 | [Mint](https://www.tamtam.ai/c/mint-toronto) (themintagency.com)<br>A Toronto-based independent creative agency specializing in brand building to positively impact culture and the future through multidisciplinary expertise | Advertising Services | 🇨🇦 Toronto | 164 | 2005 |
| 29 | [JAM CRM](https://www.tamtam.ai/c/jam-crm) (jamcrm.com)<br>The company specializes in CRM Marketing with a focus on empowering culture, personalized communication, and long-term partnerships based on measurable results | Advertising Services | 🇨🇦 Toronto | 163 | 2007 |
| 30 | [Seed](https://www.tamtam.ai/c/seed-london) (seedcreative.ca)<br>A leading total creative services provider, delivering effective advertising and marketing solutions with a track record of successful problem-solving | Advertising Services | 🇨🇦 London | 163 | 2002 |
| 31 | [#paid](https://www.tamtam.ai/c/paid) (hashtagpaid.com)<br>A technology company creating tools for the creator economy, enabling businesses to collaborate with creators and drive growth Visit website for more | Advertising Services | 🇨🇦 Toronto | 160 | 2013 |
| 32 | [Saatchi & Saatchi Canada](https://www.tamtam.ai/c/saatchi-and-saatchi-canada) (saatchi.ca)<br>A creative team of 163 diverse individuals dedicated to delivering groundbreaking ideas for the world's top brands with an unbeatable attitude | Advertising Services | 🇨🇦 Toronto | 159 | 1970 |
| 33 | [Inergi LP](https://www.tamtam.ai/c/inergi-lp) (inergi.com)<br>Inergi creates customer-centered experiences for market success through imagination and innovation, leveraging a diverse team of designers, engineers, marketers, and communicators | Advertising Services | 🇨🇦 Toronto | 152 |  |
| 34 | [Kenna](https://www.tamtam.ai/c/kenna) (kenna.ca)<br>Marketing solutions provider specializing in creating unified customer experiences through fully integrated engagement ecosystem for more personalized conversations and continuous connectivity | Advertising Services | 🇨🇦 Mississauga | 151 |  |
| 35 | [OUTFRONT Media Canada](https://www.tamtam.ai/c/outfront-media-canada) (outfrontmedia.ca)<br>Utilizing technology, strategic locations, and creative assets to connect brands with consumers through outdoor advertising campaigns on a local to national scale | Advertising Services | 🇨🇦 Toronto | 147 | 1904 |
| 36 | [Red Lion](https://www.tamtam.ai/c/red-lion) (redlioncanada.com)<br>A Toronto advertising agency specializing in creating unique solutions to influence culture through tailored campaigns for various client partners | Advertising Services | 🇨🇦 Toronto | 146 | 2012 |
| 37 | [Genumark](https://www.tamtam.ai/c/genumark) (genumark.com)<br>A Canadian leader in custom-branded merchandise and apparel, with a commitment to ethical sourcing, sustainability, and exceptional customer service | Advertising Services | 🇨🇦 Toronto | 136 | 1980 |
| 38 | [Encore Market Engagement](https://www.tamtam.ai/c/encore-market-engagement) (encore.market)<br>A leading field sales organization in Canada, specializing in consulting, technology, and execution services to optimize sales investment and drive client success | Advertising Services | 🇨🇦 Oakville | 124 | 2011 |
| 39 | [Walmart Connect Canada](https://www.tamtam.ai/c/walmart-connect-canada) (walmartconnect.ca)<br>This company connects brands with customers through advertising on Canada's largest omnichannel retail platform to drive shared growth | Advertising Services | 🇨🇦 Mississauga | 105 | 2016 |
| 40 | [Harding Display](https://www.tamtam.ai/c/harding-display) (hardingdisplay.com)<br>A leading Canadian provider of point-of-sale and in-store marketing solutions, offering innovative designs and logistical support for retail success since 1927 | Advertising Services | 🇨🇦 Toronto | 105 | 1927 |
| 41 | [Cartel](https://www.tamtam.ai/c/cartel) (cartel.me)<br>Specializing in internet marketing, digital marketing, web marketing, and e-marketing to promote products and services online effectively | Advertising Services | 🇨🇦 Cambridge | 72 |  |
| 42 | [Infiniti Retail](https://www.tamtam.ai/c/infiniti-retail) (irdinc.ca)<br>This company specializes in creating and executing integrated brand activations, focusing on instore marketing and digital instore strategies | Advertising Services | 🇨🇦 Toronto | 65 |  |
| 43 | [Promotional Source](https://www.tamtam.ai/c/promotional-source) (promotionalsource.ca)<br>A leading provider of promotional products in Canada, offering a curated collection with bulk purchasing, preferential deliveries, and a Satisfaction Guarantee | Advertising Services | 🇨🇦 Toronto | 62 | 1996 |
| 44 | [Protagon Display](https://www.tamtam.ai/c/protagon-display) (protagon.com)<br>A company that partners with brands and retailers to create custom merchandising solutions, focusing on attracting customers and delivering results | Advertising Services | 🇨🇦 Toronto | 59 | 1995 |
| 45 | [Ex-Sell Canadian Instore Services](https://www.tamtam.ai/c/ex-sell-canadian-instore-services) (ex-sell.com)<br>A Canadian retail support company offering HQ support, in-store service teams, merchandising, display installs, demonstrations, training, and assisted sales programs | Advertising Services | 🇨🇦 Oakville | 58 | 1983 |
| 46 | [Entripy Custom Clothing](https://www.tamtam.ai/c/entripy-custom-clothing) (entripy.com)<br>A leading Canadian company specializing in custom printed apparel and promotional products, offering a wide range of options with fast turnaround times and competitive pricing | Advertising Services | 🇨🇦 Oakville | 56 | 1999 |
| 47 | [Central Station Toronto](https://www.tamtam.ai/c/central-station-toronto) (centralstationto.com)<br>A unique agency specializing in branding, innovations, physical experiences, and digital marketing to create impactful connections and move people | Advertising Services | 🇨🇦 Toronto | 54 | 2015 |
| 48 | [Pareto - CLOSED PERMANENTLY](https://www.tamtam.ai/c/pareto-closed-permanently) (pareto.ca)<br>Specializing in metrics-driven marketing solutions to drive sales, enhance brand presence, and optimize customer engagement through innovative business strategies and services | Advertising Services | 🇨🇦 Toronto | 53 |  |
| 49 | [Measure Marketing Results Inc.](https://www.tamtam.ai/c/measure-marketing-results-inc) (measuremarketing.com)<br>Develops innovative digital marketing strategies focused on demand generation, lead qualification, sales support, revenue growth, and maximizing ROI for businesses. | Advertising Services | 🇨🇦 Toronto | 51 | 2008 |
| 50 | [ALKO](https://www.tamtam.ai/c/alko) (alko.com)<br>Provider of strategic materials and services including digital printing, web design, and plastic gift cards & loyalty programs for clients in evolving business environments | Advertising Services | 🇨🇦 Kitchener | 40 | 1963 |

## 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 Ontario

- [The largest companies in Ontario](https://www.tamtam.ai/l/largest-companies-ontario) (5,032)
- [Multinational companies in Ontario](https://www.tamtam.ai/l/multinational-companies-ontario) (901)
- [Financial services firms in Ontario](https://www.tamtam.ai/l/financial-services-firms-ontario) (396)
- [Manufacturers in Ontario](https://www.tamtam.ai/l/manufacturers-ontario) (389)
- [Critical infrastructure operators in Ontario](https://www.tamtam.ai/l/critical-infrastructure-operators-ontario) (344)
- [Retail chains in Ontario](https://www.tamtam.ai/l/retail-chains-ontario) (327)
- [Companies with in-house R&D in Ontario](https://www.tamtam.ai/l/r-and-d-companies-ontario) (300)
- [Logistics companies in Ontario](https://www.tamtam.ai/l/logistics-companies-ontario) (285)
- [Education providers in Ontario](https://www.tamtam.ai/l/education-companies-ontario) (276)
- [SaaS companies in Ontario](https://www.tamtam.ai/l/saas-companies-ontario) (275)
- [Truck Transportation companies in Ontario](https://www.tamtam.ai/l/truck-transportation-companies-ontario) (270)
- [Transportation, Logistics, Supply Chain and Storage companies in Ontario](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-ontario) (261)
- [Public sector organisations in Ontario](https://www.tamtam.ai/l/public-sector-organisations-ontario) (259)
- [Financial Services companies in Ontario](https://www.tamtam.ai/l/financial-services-companies-ontario) (250)
- [IT Services and IT Consulting companies in Ontario](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ontario) (235)
- [Software Development companies in Ontario](https://www.tamtam.ai/l/software-development-companies-ontario) (231)
- [Healthcare providers in Ontario](https://www.tamtam.ai/l/healthcare-providers-ontario) (226)
- [Hardware manufacturers in Ontario](https://www.tamtam.ai/l/hardware-companies-ontario) (213)
- [Professional services firms in Ontario](https://www.tamtam.ai/l/professional-services-firms-ontario) (211)
- [Hospitals and Health Care companies in Ontario](https://www.tamtam.ai/l/hospitals-and-health-care-companies-ontario) (205)
- [Distributors and wholesalers in Ontario](https://www.tamtam.ai/l/distributors-and-wholesalers-ontario) (183)
- [Companies with a mobile app in Ontario](https://www.tamtam.ai/l/companies-with-mobile-app-ontario) (181)
- [Publicly traded companies in Ontario](https://www.tamtam.ai/l/publicly-traded-companies-ontario) (156)
- [IT services companies in Ontario](https://www.tamtam.ai/l/it-services-companies-ontario) (156)

## The same list elsewhere in Canada

- [Advertising Services companies in Canada](https://www.tamtam.ai/l/advertising-services-companies-canada) (182)
- [Advertising Services companies in the province of Quebec](https://www.tamtam.ai/l/advertising-services-companies-province-of-quebec) (34)
- [Advertising Services companies in British Columbia](https://www.tamtam.ai/l/advertising-services-companies-british-columbia) (28)
- [Advertising Services companies in Toronto](https://www.tamtam.ai/l/advertising-services-companies-toronto) (66)
- [Advertising Services companies in Montreal](https://www.tamtam.ai/l/advertising-services-companies-montreal) (26)

## The same list elsewhere

- [Advertising Services companies in the world](https://www.tamtam.ai/l/advertising-services-companies-in-the-world) (7,500)
- [Advertising Services companies in North America](https://www.tamtam.ai/l/advertising-services-companies-in-north-america) (2,164)

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Source: https://www.tamtam.ai/l/advertising-services-companies-ontario