Overall Comparison
BetRivers ✔ Lower Vig
Average vig · D
↑ 0.06% up since yesterday
Fliff
Average vig · D-
↑ 0.08% up since yesterday
BetRivers wins on 16 of 18 sports. The biggest gap is in EPL, where BetRivers charges 4.19% less vig. Fliff is only competitive in NCAA Baseball and NBA.
BetRivers and Fliff represent fundamentally different approaches to sports betting in the U.S. market. BetRivers, operated by Rush Street Interactive, is a traditional licensed sportsbook available in numerous regulated states, offering standard real-money wagering with a full suite of pre-match and live betting markets. Fliff, while also operating legally, uses a social sportsbook model built around sweepstakes-style currency — Fliff Cash and Fliff Coins — which allows it to operate in a broader range of states where traditional sports betting legislation hasn't yet passed. This distinction in business model shapes nearly everything about the two platforms, from market depth to the profile of their typical user.
Bettors who prioritize a conventional sportsbook experience — real-money deposits, established banking methods, competitive lines across major and niche markets, and access to parlays, teasers, and props — will generally gravitate toward BetRivers. Its vig tends to be competitive among mid-tier U.S. books, and it frequently offers boosted odds and promotional pricing. Fliff, on the other hand, appeals to bettors in states without legal real-money sportsbooks, casual users who want a low-barrier entry point, or those looking to wager smaller amounts without the friction of traditional deposit and KYC processes. If you're in a state where BetRivers operates, it's typically the more versatile option; if you're not, Fliff fills a gap that few other platforms address.
Beyond vig, bettors should weigh several practical factors. BetRivers offers higher limits, faster payouts through established withdrawal channels, and a more mature interface with robust live betting functionality. Fliff's sweepstakes model means redemption processes for Fliff Cash can be slower and less transparent than standard sportsbook withdrawals. Market selection is also notably deeper on BetRivers, particularly for in-play wagering and derivative props. Reliability and customer support infrastructure tend to favor BetRivers as well, given Rush Street Interactive's longer track record. The live vig data on this page provides a real-time snapshot of where each book prices its markets — useful context for understanding which platform consistently offers sharper numbers on the sports you bet most.
Vig Comparison by Sport
Frequently Asked Questions
Is BetRivers or Fliff better for odds?
BetRivers currently offers lower vig overall. BetRivers averages 7.60% vig (D) while Fliff averages 9.28% vig (D-).
How does BetRivers compare to Fliff by sport?
We compare both books across 71 sports. The comparison covers vig percentages, grades, and which book offers better odds per sport.
What is vig (vigorish) in sports betting?
Vig — short for vigorish, also called juice or overround — is the margin a sportsbook builds into its odds. It's the difference between the true probability of an outcome and what the odds imply. Lower vig means you keep more of your winnings on every bet. For example, a standard -110/-110 line has about 4.76% vig.
How often is this data updated?
We pull fresh odds from The Odds API three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds. The timestamp at the top of the page shows the most recent refresh.
How is the vig grade calculated?
Each sportsbook is graded on a letter scale based on average vig: A+ (under 2%) is exceptional, A (2–3%) is excellent, B+ (3–4%) is above average, B (4–5%) is the industry standard, C (5–6%) is below average, and D (above 6%) indicates high-juice markets.
Why does lower vig matter for bettors?
Lower vig directly impacts your long-term returns. A bettor placing $1,000 per week at a book with 4% vig loses roughly $40/week to the house edge. At 2% vig, that drops to $20/week — a $1,040 difference over a year. For serious bettors, shopping for lower vig is one of the most reliable ways to improve profitability.
What sportsbooks do you track?
We track both regulated US sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) and offshore books (Bovada, BetOnline, MyBookie, BetUS, LowVig.ag, BetAnySports). Data comes from The Odds API, which aggregates real-time lines from licensed sources.
How We Calculate These Numbers
- Data Source
- All odds on this page come from The Odds API, which aggregates real-time lines from licensed US and offshore sportsbooks. We track moneyline, spread, and totals markets across every sport with active betting lines.
- Update Frequency
- We pull a fresh snapshot of every tracked market three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds for a given event. The timestamp at the top of each page tells you exactly when the data was last refreshed.
- Vig Calculation
- Vig (short for vigorish, also called juice or overround) measures the margin a sportsbook builds into its odds. We calculate it by converting the odds on each side of a market to implied probabilities, summing those probabilities, and subtracting 100%. For example, a market priced at -110/-110 implies 52.38% on each side — a total of 104.76%, meaning a vig of 4.76%. Lower vig means better value for bettors because you keep more of your winnings.
- Per-Market Breakdown
- We compute vig separately for each market type: moneyline (h2h), point spreads, and totals (over/under). The "average vig" shown for each sportsbook is the mean across all market types weighted by the number of events sampled in each market.
- Grading Scale
- Every sportsbook receives a letter grade based on its average vig: A+ (under 2%) is exceptional and rare — these are typically sharp-friendly books. A (2–3%) is excellent. B+ (3–4%) is above average. B (4–5%) is the industry standard for most recreational sportsbooks. C (5–6%) is below average. D (above 6%) indicates high-juice markets where bettors face a steep cost per wager.
- Trend Tracking
- We store daily snapshots for 30 days, allowing us to show 24-hour and 7-day vig trends. A downward trend (improving) means sportsbooks are tightening their lines — often in response to increased competition or higher betting volume as a season heats up.