If you’ve been researching non-surgical skin tightening, you’ve almost certainly run into both of these. They get compared constantly, usually by clinics that only offer one of them.
Here’s the thing most comparison articles won’t say plainly: these are both legitimate treatments with real clinical evidence behind them. Neither is a gimmick. They reach similar tissue by
completely different physical means, and the right answer depends on your anatomy, your tolerance for discomfort, and what you’re actually trying to change.
We offer XERF at our St. Petersburg clinic. We don’t offer Ultherapy. We’re telling you that up front so you can weigh what follows accordingly — and we’ve tried to write the version we’d want to read if we were the ones spending the money.
Ultherapy uses focused ultrasound to create precise thermal points at set depths. XERF uses radiofrequency to heat a broader volume of tissue across multiple depths at once. Ultherapy is more established and has more published research. XERF is newer, notably more comfortable, and treats a wider area per pass.
Ultherapy delivers micro-focused ultrasound with visualization — MFU-V. Focused sound waves converge at a specific point beneath the skin and create a small zone of controlled thermal injury, typically at depths of 1.5mm, 3.0mm, and 4.5mm. The 4.5mm setting reaches the SMAS, the connective tissue layer surgeons lift during a facelift.
The distinguishing feature is the imaging. Ultherapy shows the provider a real-time ultrasound view of the tissue underneath, so they can see the layers before delivering energy. No other device in this category does that. For patients with unusual anatomy or previous surgery, that visibility genuinely matters.
Energy lands in discrete points rather than continuously — think of it as a grid of small treatment zones rather than a wash of heat.
XERF is monopolar radiofrequency. It passes an electrical current through tissue, and the tissue’s own resistance generates heat. What makes XERF different from previous RF devices is that it runs two frequencies at the same time: 6.78 MHz, which concentrates in the upper dermis, and 2 MHz, which travels deeper toward the SMAS.
Because RF heats a volume rather than a point, coverage per pass is broader. The handpiece also reads your skin’s electrical resistance on every pulse and adjusts output accordingly, with surface cooling running throughout.
| XERF | Ultherapy PRIME | |
|---|---|---|
| Energy | Dual-frequency monopolar RF (6.78 + 2 MHz) | Micro-focused ultrasound with visualization |
| Imaging | No | Yes — real-time ultrasound view |
| Depth | Shallow, mid, and SMAS simultaneously | Discrete points at 1.5 / 3.0 / 4.5mm |
| Coverage | Broad volume per pass | Focused points in a grid |
| Numbing | Generally not needed | Commonly used |
| Reported comfort | Warm; most patients rate it low | More intense; the main patient complaint |
| Sessions | 1–2, often spaced 4–6 weeks | Usually 1 |
| Downtime | None | Minimal; some swelling possible |
| Results timeline | Builds over 2–6 weeks, peaks 3–6 months | Builds over 2–3 months, peaks around 6 |
| U.S. track record | Cleared 2025 | Over a decade, extensive published literature |
This is the honest headline. Ultherapy’s efficacy is well established, and so is the fact that patients find it uncomfortable. Most providers use numbing, and a fair number of patients describe the deeper passes as sharp or hot. It’s tolerable — millions of treatments have been performed — but people remember it.
XERF was engineered around this problem. Continuous surface cooling plus real-time output adjustment means most patients get through a full face without topical anesthetic and describe it as a hot stone massage. That’s not marketing spin; it’s the single most commonly cited reason the device has drawn attention since launch.
If discomfort is the reason you’ve put off skin tightening, this difference is the whole conversation.
Ultherapy has been in the U.S. market for over a decade with a large body of peer-reviewed literature, consensus guidelines from expert panels, and millions of treatments performed. XERF earned FDA clearance in 2025 and has years of use in South Korea behind it, but the U.S. long-term data simply doesn’t exist yet at the same scale.
If you weight published evidence heavily, that’s a real point in Ultherapy’s favor, and any provider who waves it away is selling rather than advising.
Real-time visualization is a genuine engineering advantage. For a patient with prior facial surgery, implants, or atypical tissue thickness, seeing the layers before treating them is meaningfully safer. For a typical patient with early jawline laxity, it’s a nice-to-have rather than a deciding factor.
Focused points versus heated volume produce slightly different result characteristics. Point-based energy can produce more concentrated lift at specific vectors. Volume heating tends to read as more even overall firming. Neither is objectively better — they’re different, and which you prefer is genuinely subjective.
We’d rather tell you this than have you find out later:
Worth saying plainly. If you have significant excess skin — the kind that hangs or folds — no energy device is going to get you where you want to go. Both treatments improve skin quality and produce modest lift. Neither removes tissue.
A patient with substantial laxity who spends several thousand dollars on either one is usually disappointed, and that disappointment was predictable at the consultation. A plastic surgery referral is the more honest answer, and it’s one we give regularly.
Nationally, XERF runs roughly $1,500–$3,000 per session depending on area and market. Ultherapy typically lands in a similar range, sometimes higher for full face and neck. In practice the two are close enough that price shouldn’t be your deciding factor. Session count matters more than sticker price — a single Ultherapy session versus a two-session XERF series can land at similar total spend.
Both treatments are available in the Tampa Bay area. A few things worth asking whichever clinic you visit:
If you want the longest track record and the imaging advantage, and you can tolerate a more intense appointment, Ultherapy is a well-supported choice and you should book it without hesitation.
If comfort has been your barrier, if you want zero downtime, or if you want texture and structure addressed together, XERF is worth a serious look.
The one thing that won’t help is choosing based on whichever clinic markets harder. Get assessed by someone willing to tell you when their own device isn’t the right answer.
Considering XERF in St. Petersburg? We offer complimentary skin tightening assessments — about twenty minutes with a provider who will give you a straight read on your skin, including whether a different treatment or a surgical referral makes more sense for what you’re seeing.
Book your assessment or call (727) 201-9095.
Learn more about XERF at Optimal Wellness.
Individual results vary. This article is educational and does not constitute medical advice. Treatment eligibility is determined by a licensed provider following a medical history review. Optimal Wellness St. Pete is an independent provider and is not affiliated with or endorsed by the manufacturers of any device named here.
