BetBuilder by Oddin.gg: The Bet Builder Built for Esports and eSims

TL;DR

While most bet builders were created for traditional sports and adapted for esports, BetBuilder from Oddin.gg was built for esports and eSimulators. The deployment data reflects that difference: bettors construct higher-odds, multi-leg slips, and pre-match margins run up to 3× higher than standard esports bets.

Combination betting drives margin. In esports, it needs to be built for it.

Combination bets are a natural part of traditional sports betting. From the NBA to the NFL to football leagues around the world, bettors combine outcomes within the same match, stacking selections into a single same-game parlay with a higher potential payout that rewards them for getting it right. For operators, the result is higher hold per bet, longer sessions, and stronger margins. It’s one of the reasons bet builders have become a standard sportsbook product.

In esports, though, that same relationship between combination depth and margin doesn’t always hold. The reason usually comes down to the product itself. Specifically, the fundamentals that determine whether a bet builder actually changes how bettors bet: how many markets can be combined within a single match, whether combinations work during live play, and whether the tool was designed around how esports matches unfold.

Those fundamentals are what shaped our BetBuilder. It was designed from the ground up to work with the structure of esports matches and the pace of eSims content. And the data from live deployments shows what that difference looks like in practice.

How BetBuilder works across esports and eSims

BetBuilder gives bettors access to a wide range of combinable markets within a single esports or eSims match. Rather than being limited to a few selections, bettors can layer outcomes across the match until the bet reflects their own read on how things will play out.

The range of available combinations is one of the key differences. In a CS2 match, each round generates its own set of outcomes: map and round winners, pistol round results, round handicaps, and more. BetBuilder lets bettors combine across those outcomes within the same match, so the slip can be as simple or as detailed as they want. In eSimulator titles like eFootball and eBasketball, where matches run continuously in short cycles, the same applies across a session of matches. That kind of short-cycle, high-frequency environment requires a bet builder designed for it, which is one reason BetBuilder was built to support eSims alongside core esports titles.

The other key difference is live betting support. Live betting accounts for the majority of esports activity. If combination betting is only available pre-match, it misses the window where most betting decisions happen. Our BetBuilder works in both pre-match and live environments, so bettors can build and adjust multi-leg slips while the match is still going.

For operators, this means two things. First, the product creates a reason for bettors to spend more time building bets within a single match rather than placing quick singles and moving on. Second, because those bets carry higher total odds, the margin profile shifts in the operator’s favor.

The numbers behind it

Across live BetBuilder deployments, two things stand out.

Bettors build genuinely different bets. On pre-match markets, average odds on BetBuilder slips sit at 4.89 across supported titles, compared to 1.82 on standard bets. That’s roughly 2.7× higher. You only see that kind of gap when bettors are consistently stacking multiple selections into each slip. Stakes tend to be smaller on each individual bet, but the total odds are significantly higher. It’s the same pattern you see in any mature market where combination betting works well.

Margins are meaningfully higher. Across titles, BetBuilder bets generate materially higher hold than non-BetBuilder bets from the same bettor base. The headline figure is up to 3× higher margins on pre-match bets, but in some titles, the difference is larger than that.

It’s worth being clear what this means in practice. BetBuilder doesn’t replace standard betting, and the results don’t apply equally across every bettor. What it does is give a segment of bettors a different way to engage with a match, and that segment generates stronger margins. The value comes from how those bets are structured, not from how many bettors use the tool.

What we’re seeing across our partners

Beyond the margin story, the usage trajectory suggests bettors come back to this.

Across our partners, eFootball live BetBuilder volume has grown consistently since June 2025, averaging over 24% week-on-week. Given how frequently eFootball matches run, that points to bettors returning to the tool across sessions.

Across all supported titles, we’ve seen month-to-month volume grow by 64%, suggesting the product is reaching a broader range of bettors rather than remaining in a niche.

What BetBuilder covers today and what’s coming

BetBuilder is currently live across Counter-Strike 2, VALORANT, CS2 Duels, eFootball, and eBasketball, covering both pre-match and live environments.

On the roadmap: Dota 2, League of Legends, map-level combinations, pre-combined bets, and expanded live options.

How integration works

If you’re already using the Oddin.gg iFrame, BetBuilder sits on top of the existing setup. If not, it can be deployed via API. Correlation and pricing are handled within the product, so adding combination betting doesn't create additional workload for your trading team.

See it running in real matches

The simplest way to evaluate BetBuilder is to see the data on live matches: how the bets are being built, what the odds look like, and how the margin compares to non-BetBuilder bets.

Request a BetBuilder Demo

FAQs

Does BetBuilder work for eSimulator titles like eFootball?

Yes. It supports both esports and eSimulators, including eFootball and eBasketball. These titles run continuously with short match cycles, which makes live combination betting particularly effective. eFootball live BetBuilder volume has averaged 24%+ weekly growth since June 2025.

How does BetBuilder affect operator margins?

Operators using BetBuilder have seen up to 3× higher margins on pre-match bets compared to standard bets. In some titles, the difference is larger. The change comes from how bets are structured: bettors build higher-odds, multi-leg slips rather than placing singles.

Can BetBuilder be used for live betting?

Yes. Bettors can build multi-leg combinations during a match, which matters because live betting accounts for the majority of esports activity. Live combinations support longer sessions and more bets within the same event.

How does BetBuilder integrate with existing platforms?

If you’re already using Oddin.gg, BetBuilder sits on top of the existing setup. Otherwise, it can be deployed via API. Correlation and pricing are handled within the product.