If you’re researching non-surgical skin tightening, you’ve probably come across both XERF and Ultherapy in your search. They’re often mentioned in the same breath because they promise similar results — firmer, lifted, more youthful-looking skin without surgery — but they get there in very different ways. Here’s how they compare.
The Core Difference: Radiofrequency vs. Ultrasound
The biggest distinction between these two treatments comes down to the type of energy they use.
XERF is a radiofrequency (RF) treatment. Specifically, it’s a monopolar RF system that uses two frequencies at once — 6.78 MHz and 2 MHz — to heat tissue at multiple depths in a single session. The higher frequency targets the upper dermis to improve texture and fine lines, while the lower frequency reaches deeper, down to the SMAS (the structural layer beneath the skin that also gets addressed in surgical facelifts).
Ultherapy is a HIFU (high-intensity focused ultrasound) treatment. Rather than heating tissue in broad layers the way RF does, it uses focused ultrasound to create precise thermal “dots” at specific depths, including the SMAS. It’s also the original branded, FDA-cleared HIFU device, and it’s been in clinical use since 2009.
How They Work
| XERF | Ultherapy | |
| Energy type | Monopolar radiofrequency (dual frequency) | High-intensity focused ultrasound (HIFU) |
| Depths treated | Shallow, mid, and deep layers, including SMAS | Multiple depths down to SMAS |
| Real-time imaging | Uses impedance feedback to gauge skin response | Uses real-time ultrasound visualization (DeepSEE) so the provider can see tissue layers directly |
| Numbing required | No — designed as a “never-numb” treatment with built-in cooling | Not usually required, though some patients opt for it due to discomfort |
| FDA status | FDA-cleared | FDA-cleared (with clearances covering brow, neck/chin, and décolletage specifically) |
One meaningful difference is how each device confirms it’s treating the right layer. Ultherapy’s defining feature is real-time ultrasound imaging, which lets the provider literally see the tissue before firing energy into it. XERF doesn’t image tissue directly; instead, it uses real-time impedance feedback to adjust energy delivery based on the skin’s electrical resistance, which changes with tissue type and depth. Both approaches aim for precision, but they measure it differently.
Comfort and Downtime
This is where XERF tends to stand out. It was engineered around comfort, using a cooling system (Advanced Integrated Cryogen Delivery) alongside a pulsing technology designed to keep the skin’s surface temperature low while still delivering heat deeper down. The result, according to providers, is a treatment that generally doesn’t require numbing cream and has little to no downtime, which also means shorter appointment times.
Ultherapy is also non-invasive with minimal downtime, but many patients report more noticeable heat and discomfort during treatment, since focused ultrasound pulses can create brief, sharp sensations as they hit the target depth.
Treatment Areas
Ultherapy has specific FDA clearances for the brow, chin and neck, and for improving lines and wrinkles on the décolletage. It’s built a long track record in these areas, backed by over a decade of clinical data.
XERF is newer and marketed more broadly as a general skin-tightening and lifting treatment for the face and body, with customizable depth and intensity settings that providers adjust to the individual. Because it’s newer to the market, it doesn’t yet have the same volume of long-term published outcomes data that Ultherapy has accumulated.
Which One’s “Better”?
There’s no universal answer — it depends on what you’re prioritizing:
- Want the most established, most-studied option with a long clinical track record? Ultherapy has more years of data behind it and clearly defined FDA-cleared indications.
- Prioritizing comfort and wanting to avoid numbing or a longer, more intense appointment? XERF’s cooling technology and “never-numb” design may be more appealing.
- Looking for a single treatment that adjusts precisely to your skin using real-time feedback? Both devices offer some form of real-time customization — Ultherapy through direct visualization, XERF through impedance-based feedback.
The Bottom Line
XERF and Ultherapy are both non-surgical, non-invasive treatments aimed at tightening skin and stimulating collagen production at multiple tissue depths, including the SMAS layer that surgeons address in facelifts. The main differences are the energy source (RF vs. ultrasound), how each system confirms it’s treating the right depth, and the patient comfort experience during treatment.
As with any energy-based aesthetic treatment, results and suitability vary by individual, and outcomes depend heavily on the skill and experience of the provider performing the treatment. A consultation with a board-certified dermatologist or plastic surgeon is the best way to figure out which treatment — if either — is right for your skin and goals.
