Ontario’s online casino industry is booming, but London entrepreneurs should still vet any site before they recommend It

Looking for the best Ontario online casinos? An expert comparison guide compares the top options in the province

LONDON INC. READERS spent 10 weeks nominating and voting before this year’s Best of London 2026 winners were named, and the businesses on that list know what a public recommendation is worth in this city. Most of them spent years earning it. That is a useful yardstick for a very different kind of recommendation now being sold across Ontario, one that can be set up in an afternoon: the paid referral to an online casino.

The money behind it is not small. Ontario’s regulated igaming market took more than $103 billion in wagers in fiscal 2025/26 and kept more than $4.2 billion as gaming revenue, according to iGaming Ontario’s unaudited year four figures. That kind of growth pulls in marketers, content creators, podcasters and small publishers who are paid a commission for every player they send to an operator, and it explains why comparison guides such as this one to the best online casinos in Ontario now sit near the top of so many search results. Used properly, a guide like that is a vetting tool: a quick way to check which brands hold a provincial licence before anyone, a reader or a business owner thinking about entering the space, takes a chance on a site they found through an ad.

What a licence in Ontario actually covers

Ontario runs a two part system. The Alcohol and Gaming Commission of Ontario registers operators and enforces its Registrar’s Standards for Internet Gaming, while iGaming Ontario, a provincial agency, signs the commercial agreements that let those operators take bets from people located in the province. As of September 1, 49 operators were running 84 gaming websites under that arrangement.

The standards go further than most people assume. Public advertising of sign up bonuses and deposit matches is banned under Standard 2.05; offers can only be shown on the operator’s own site or sent directly to a player who has opted in there. Since February 28, 2024, active and retired athletes have been barred from igaming ads aimed at Ontario audiences, and celebrities likely to appeal to minors face tight limits too. An offer cannot be called “free” or “risk free” unless it really is.

The province says the model is working. An Ipsos study commissioned by the AGCO and iGaming Ontario and released in May found that 91 per cent of Ontarians who gamble online are doing it on regulated sites, up from 83.7 per cent a year earlier. The share who said they gambled only on unregulated sites fell to 8.9 per cent from 16.3 per cent.

The rules travel with the recommendation

This is where the entrepreneurial angle gets real. The AGCO does not require every marketing affiliate to register on its own; it decides case by case, and its supplier guide lists commission based traffic sites among the businesses that may not need registration. But Standard 1.19 makes operators answerable for the conduct of any third party they contract, which means the advertising rules flow straight into the affiliate’s contract. Standard 1.21 adds a hard line: an affiliate working for a licensed Ontario operator cannot also promote gaming sites that take Ontario players without AGCO registration.

In practice, a London agency or creator who puts a licensed brand on the same page as a grey market site is putting the commercial relationship at risk, along with the trust of whoever reads the page. Operators audit their partners for exactly this reason. A business owner weighing a sponsorship or referral deal should ask the operator for its iGaming Ontario listing and its affiliate terms in writing, the same way they would check a contractor’s WSIB clearance before letting anyone on a job site.

Red flags to check before trusting a “top casino” list

Most bad lists give themselves away quickly. Five checks catch the majority of them:

A brand on the list does not appear on iGaming Ontario’s public directory of operators and gaming websites. That directory is the only list that matters for anyone physically in the province.

The page names a licence from Curaçao, Malta, Anjouan or Kahnawake as proof a site is legal in Ontario. Those licences can be legitimate where they apply, but they do not authorise a site to serve Ontario players.

Bonus amounts are splashed across an ad or social post aimed at Ontarians, which is the kind of public inducement marketing Standard 2.05 was written to stop.

The page never explains how its rankings are decided, or never discloses that it earns a commission from the brands it ranks.

Offers are described as risk free, or payouts are promised on a timeline nobody can guarantee.

None of these proves bad intent on its own. Together they are a strong sign that the list was built for clicks and not for the reader.

Growth is real, and so is the competition

For anyone treating this as a business opportunity, the latest monthly numbers are a reminder that a growing market is not a guaranteed one. iGaming Ontario’s August report showed total revenue of $396.3 million, up 18.4 per cent on August 2025, with casino games accounting for 85 per cent of it. Sports betting revenue fell sharply from July, and active player accounts dropped to about 1.21 million from 1.37 million the month before. Casino play is carrying the market, and that leaves revenue concentrated in one product.

Competition is also widening beyond the province. Alberta opened its own regulated igaming market on July 13 of this year, so the operators and affiliates chasing Ontario players are now spreading budgets across two provincial markets with their own rules. iGaming Ontario’s 2026 to 2029 business plan notes that operators have started chasing profitability over pure growth, with fewer promotional losses. For affiliates, that usually means tighter commission deals and closer scrutiny of where their traffic comes from.

The sector’s overall scale is not in doubt. Ontario’s licensed casino sites are now a multibillion dollar line in the provincial economy, and a properly run referral business can be a legitimate part of it. What separates the sound version from the risky one is the same thing that separates a Best of London winner from a business with a slick ad and no track record: the work behind the recommendation. London has spent years learning to tell the two apart, and that habit is worth keeping when the product is a gaming site.