Onyx Boxing vs. the Top 6 Group Fitness Studios: An Honest Comparison

If you live in Scottsdale or the East Valley, you have no shortage of group fitness options. Heart-rate studios, functional-training circuits, bag-cardio franchises — they're on practically every corner. So where does a certified boxing studio like Onyx actually fit, and how do we stack up on the things you care about: price, time, and results?

We pulled the publicly available 2026 numbers for the six concepts we get compared to most. We've tried to be fair — including the places where another studio might genuinely be the better call for you. Here's the honest breakdown.

→ Swipe to see the full table

Pricing and figures gathered from publicly available sources in June 2026. Nearly every brand here is franchised, so prices vary by location and promotion — always confirm with the specific studio. *Onyx's calorie figure is an honest estimate for a 45–60 minute boxing class; actual burn depends on body weight and effort. "Advertised" numbers are each brand's own marketing claims, which tend to reflect best-case ceilings rather than averages.

Price: Where Onyx Lands

For unlimited monthly training, Onyx's $129/month comes in below the boutique boxing and HIIT brands that often run $150–$300 — Rumble and the premier tiers at Orangetheory and F45 in particular. If you train fewer than three times a week, our $109 eight-class plan or the 10-class pack ($140, or $14 a class) usually beats paying a premium studio's full unlimited rate you won't fully use.

The bigger difference is how you get in the door. Most studios offer a single free class — one session to decide. Onyx gives you a full week of unlimited classes for $15. A week is enough time to get past the first-class nerves, feel the soreness fade, and actually know whether boxing is for you before you commit to anything. And every Onyx plan is month-to-month with no long-term contract.

Time: The 30-to-60 Minute Spread

If your only constraint is the clock, 9Round wins on pure speed — a 30-minute circuit with no class schedule, so you start when you walk in. That's a real advantage for a packed calendar, and we'll happily say so.

Everyone else, Onyx included, lands in the 45–60 minute range. The trade-off is what fills those minutes. A longer class buys time for a proper warm-up, genuine skill coaching, rounds on the bag, and a cool-down — not just a sweat-and-go. For most people building a real skill, that's time well spent rather than time lost.

Calorie Burn: Reading the Claims Honestly

You'll notice the "calories" column ranges from 300 to 1,200. Here's the part most gyms won't tell you: those high numbers are marketing ceilings, not averages. A "burn up to 1,200 calories" claim describes a heavier athlete going all-out for a full hour — not what a typical member burns on a typical day.

The honest reality is that any high-intensity boxing or HIIT class in this list will put most people in roughly the 400–800 calorie range per session, driven far more by your body weight and how hard you work than by the logo on the wall. Heavy-bag work like Onyx's ranks among the higher-burn group formats because it's full-body and continuous — but we'd rather you trust us with a real number than chase an inflated one. The studio that promises the biggest calorie figure is rarely the one delivering the best workout.

The Thing No One Else on This List Offers

Here's the distinction that matters most. Of the seven studios in that table, only Onyx is an actual boxing gym.

TITLE, Rumble, 9Round, and CKO are bag-cardio and kickboxing-fitness concepts — great workouts, but built around hitting a bag to a beat, not learning to box. Orangetheory and F45 aren't boxing at all; they're heart-rate and functional-training studios. At Onyx, every coach holds a USA Boxing certification — the credential issued by the national governing body for the sport in the United States. You don't just sweat. You learn real footwork, real technique, and the six fundamental punches, taught by someone qualified to teach them.

That's why people who start at a bag-cardio franchise often end up at Onyx eventually: once you want to actually get good at boxing, you need coaching, not choreography.

So Who Should Pick Whom?

We'll be straight with you, because pretending we're right for everyone helps no one:

• Pick 9Round if your single biggest constraint is time and you want in-and-out in 30 minutes with no schedule.
• Pick Orangetheory or F45 if you specifically want treadmill/rower or barbell-style functional training and aren't drawn to boxing at all.
• Pick TITLE, Rumble, or CKO if you want a high-energy, music-driven bag-cardio class and aren't fussed about learning real boxing technique.
• Pick Onyx Boxing if you want to genuinely learn to box from certified coaches, in a real boxing room, at a price that undercuts the premium boutiques — with a full week to try it for $15.

The Bottom Line

On price, Onyx sits at or below most of the field for unlimited training and offers the most generous trial in the group. On time, we're in the standard 45–60 minute range — built to teach, not just to burn. And on the one dimension that's hardest to copy — certified boxing coaching and real skill — nobody else on this list is even playing the same game.

The best way to settle a comparison is to feel it. Come take a week of unlimited classes for $15 at our Scottsdale or Mesa studio and see how it stacks up against anything else you've tried.