Company lists · Data refreshed September 2026

Top 25 Supply side platform agencies based in Canada

Name: Supply side platform agencies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 60 companies tracked

RevenueBase identified 60 supply side platform agencies headquartered in Canada as of September 2026 and tracks 1,391 professional contacts across them, including 747 with verified work emails and 221 with mobile numbers. Toronto is the largest hub.

This list covers supply side platform agencies headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 6, 2026 86% judged on-target in blind review

60Companies

1,391Contacts tracked

747Verified emails

221Mobile numbers

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The 25 largest supply side platform agencies based in Canada

Ranked by team size

Top 25 of 60 supply side platform agencies based in Canada, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to supply side platform agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Index Exchange	Strong evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	501-1,000	671 contacts →
	“Index Exchange is a global advertising supply-side platform enabling media owners to maximize the value of their content on any screen.” Source: company website · checked Sep 6, 2026
2	Monetizemore	Indirect evidence	White Rock, BC, CanadaHQ checked Sep 6, 2026	51-200	101 contacts →
	“MonetizeMore is a Google Certified Publishing Partner that has built an award-winning suite of AdTech to empower digital publishers.” Source: company website · checked Sep 6, 2026
3	Optable	Partial evidence	Montréal, CanadaHQ checked Sep 6, 2026	51-200	63 contacts →
	“Optable is the Agentic Audience Platform for publishers and media companies, providing the infrastructure to build identity, activate premium audiences, and transact efficiently…” Source: company website · checked Sep 6, 2026
4	Sharethrough	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	51-200	62 contacts →
	“Sharethrough merged with District M in February 2021 to form what is now one of the leading independent global ad exchanges, connecting publishers and advertisers with true…” Source: company website · checked Sep 6, 2026
5	Clearpier Performance	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	51-200	43 contacts →
	“ClearPier is Canada’s Leading Premium Performance Marketplace.” Source: company website · checked Sep 6, 2026
6	WAR Room	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 6, 2026	11-50	40 contacts →
	“Know exactly where your digital spend is going, why it's working, and how to do more of it.” Source: company website · checked Sep 6, 2026
7	Adbutler	Partial evidence	Victoria, CanadaHQ checked Sep 6, 2026	11-50	30 contacts →
	“AdButler is an API-first ad server and retail media platform used by publishers, retailers, marketplaces, SaaS teams, and app developers to launch and scale ad businesses fast.” Source: company website · checked Sep 6, 2026
8	PDI	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	11-50	29 contacts →
	“Through a DSP-agnostic strategy, and the buying power of an internal trading desk, campaign performance is evaluated on a holistic basis using custom algorithms – in conjunction…” Source: company website · checked Sep 6, 2026
9	Blockthrough	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	11-50	28 contacts →
	“Blockthrough helps the world’s leading publishers generate incremental revenue by delivering lighter, non-disruptive ads to 350 million ad-filtering users.” Source: company website · checked Sep 6, 2026
10	Trafficjunky	Partial evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	201-500	27 contacts →
	“Founded in Montreal in June of 2008, our platform lets you reach your target audience while using data-driven decisions in order to optimize your content.” Source: company website · checked Sep 6, 2026
11	brax.io	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 6, 2026	11-50	22 contacts →
	“Brax enables content distribution at scale by providing a single platform for bulk management, unified reporting and rule-based optimization across native sources.” Source: company website · checked Sep 6, 2026
12	Sourceknowledge	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	11-50	20 contacts →
	“SourceKnowledge, founded in 2009, is an ad network that helps performance marketers and E-Commerce stores get an incremental lift in sales outside of Google, Facebook and Amazon.” Source: company website · checked Sep 6, 2026
13	Mediatonik	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	1-10	16 contacts →
	“MediaTonik est une régie publicitaire multiplateforme qui a pour mission de promouvoir et d’assurer la pérennité des éditeurs de contenu.” Source: company website · checked Sep 6, 2026
14	Cue7ven Digimark Private Limited	Indirect evidence	Bardco Blvd, CanadaHQ checked Sep 6, 2026	11-50	16 contacts →
	“CUE7VEN is a digital advertising technology company that provides programmatic advertising solutions through the use of all adverising formats.” Source: company website · checked Sep 6, 2026
15	Wired Carbon INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	11-50	13 contacts →
	“Wired Carbon is a 360-degree digital media support team of experts providing innovative and tested solutions for all players in the digital media industry ‒ ranging from direct…” Source: company website · checked Sep 6, 2026
16	ad.plus	Indirect evidence	Vancouver, CanadaHQ checked Sep 6, 2026	11-50	12 contacts →
	“Premium Solutions for Publishers and Advertisers.” Source: company website · checked Sep 6, 2026
17	Pixfuture	Partial evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	11-50	11 contacts →
	“PixFuture is an Agentic AI platform built by publishing veterans.” Source: company website · checked Sep 6, 2026
18	M32 Connect	Indirect evidence	Montreal, ON, CanadaHQ checked Sep 6, 2026	11-50	9 contacts →
	“M32 Connect is an Ad Tech & Analytics company helping digital publishers understand, control and optimize data and the various monetization sources & formats.” Source: company website · checked Sep 6, 2026
19	Hivestack By Perion	Partial evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	51-200	8 contacts →
	“Hivestack is the global, full stack, adtech company that powers the buy and sell side of programmatic digital out of home (DOOH) advertising.” Source: company website · checked Sep 6, 2026
20	Bulletin	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1-10	8 contacts →
	“Bulletin enables advertisers to reach audiences while they are streaming content on any device.” Source: company website · checked Sep 6, 2026
21	NÜ Programmatique	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	1-10	8 contacts →
	“Complices de votre performance NÜ est une extension de votre entreprise.” Source: company website · checked Sep 6, 2026
22	The Altitude Platform	Partial evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	1-10	7 contacts →
	“Altitude is a full service, cloud-based advertising management platform.” Source: company website · checked Sep 6, 2026
23	Curate	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	51-200	7 contacts →
	“Curate is a global performance-focused advertising technology firm that empowers brands and marketers through transparent, scalable, data-driven digital and mobile marketing and…” Source: company website · checked Sep 6, 2026
24	Campsite	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 6, 2026	201-500	7 contacts →
	“As part of the Broadsign family, we’re making it easier than ever for publishers, agencies and brands to harness the power of out-of-home and connect with audiences across the…” Source: company website · checked Sep 6, 2026
25	Grand Slam Media INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 6, 2026	11-50	6 contacts →
	“Grand Slam Media Inc, is a global company focused on improving the communication threshold between buyers and sellers of online advertising.” Source: company website · checked Sep 6, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: supply side platform agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names supply side platform agencies.
Partial evidence: Its own public description names part of supply side platform agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name supply side platform agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 60 supply side platform agencies based in Canada

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Supply side platform agencies based in Canada at a glance

As of Sep 6, 2026

53.7%Verified-email coverage

15.9%Mobile-number coverage

23.2Average contacts per company

11-50Median size (employees)

35.0%Largest-city concentration · Toronto

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

7020–30

3931–60

061–90

090–180

6180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among supply side platform agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “supply side platform agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names supply side platform agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among supply side platform agencies, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 747 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names supply side platform agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many supply side platform agencies are there based in Canada?

RevenueBase identified 60 supply side platform agencies headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Index Exchange, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most supply side platform agencies?

Toronto leads with 21 headquartered companies, followed by Montreal (12) and Vancouver (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 747 verified decision-maker contacts tracked across these 60 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.