The question does not have a general answer, and a clinic giving you one confidently is telling you about its equipment rather than your face. They differ in how deep the energy goes and how it is placed — diffuse and volumetric for monopolar radiofrequency, discrete and depth specific for focused ultrasound. What should decide it is what you are trying to change.

Monopolar radiofrequency is described in the literature as the most uncomfortable of the radiofrequency arrangements, precisely because it heats a large volume. Ultherapy's pooled mean pain score across 42 studies was 4.85 out of 10, and the deeper settings are felt most.

Clinics frequently propose both, and there is no reason in principle they cannot be combined. The question to ask is what each one is doing in your case — if the answer is "they work well together" without specifics, that is a sales answer rather than a plan.

How reliable are the satisfaction figures?

Less than they look. Published satisfaction for monopolar radiofrequency ranges from 50% to 82% across studies, and Ultherapy's pooled 84% falls to 62% in the studies that let patients answer neutrally rather than forcing a positive or negative. Any single number quoted to you is a selection.

Is Shurink the same as Ultherapy?

Shurink, Ultraformer, Doublo and Liftera are focused-ultrasound devices in the same category as Ultherapy, usually cheaper per session. The pooled evidence is for microfocused ultrasound as a class and does not separate one brand from another.

What if my problem is sagging rather than laxity?

Then neither is the right tool on its own. Both tighten tissue that is where it should be. A thread lift repositions tissue mechanically, and surgery does it properly — a clinic offering an energy device for descended tissue is offering the wrong category.

Comparisons · also called Thermage, 써마지, 써마지 FLX

Thermage vs Ultherapy: heat spread wide, or focused deep

Two ways of heating tissue to tighten it. What separates them is depth and how the energy is delivered — and neither repositions tissue that has descended.

Author: Aesthetics Korea Editorial Team
Medical review: Reviewed by 2 doctorsSee methodology
Published: 8 September 2026
Last updated: 8 September 2026
Last reviewed: —5 min read

Short answer

Neither is better in the abstract; they heat different things in different ways. Thermage is monopolar radiofrequency, spreading heat through a large volume of tissue up to around 20 mm deep. Ultherapy is microfocused ultrasound, delivered at set depths, the deepest reaching the SMAS — the layer a surgeon pulls on. Both tighten skin that is still in place, and neither repositions tissue that has descended.

Key facts

Thermage — technology: Monopolar radiofrequency; diffuse volumetric heating to around 20 mm
Ultherapy — technology: Microfocused ultrasound with visualization, at fixed depths of roughly 1.5, 3.0 and 4.5 mm
Delivery: Thermage heats a volume; Ultherapy places discrete points of heat at chosen depths
Pain: Monopolar is the most uncomfortable radiofrequency arrangement; Ultherapy pooled mean pain 4.85 of 10
Evidence: MFU-V pooled 89% investigator-rated improvement across 42 studies; monopolar RF satisfaction 50–82% across studies
Neither does: Reposition descended tissue, or replace lost volume

The short version

Both heat tissue so that collagen contracts and more is laid down over the following months. They differ in what they heat and how.

Thermage is monopolar radiofrequency. Current passes through tissue, and the tissue's own resistance produces heat across a large volume, reaching up to around 20 mm.

Ultherapy is microfocused ultrasound. Energy is focused to a point at a chosen depth, creating small discrete zones of thermal injury — the deepest setting reaching the SMAS, the fibrous layer a surgeon pulls on in a facelift.

Diffuse volume against precise points. That difference drives everything below.

How they work, side by side

	Thermage (monopolar RF)	Ultherapy (MFU-V)
Energy	Electrical current, resisted by tissue	Focused ultrasound
Delivery	Volumetric, diffuse	Discrete points at set depths
Depth	Up to about 20 mm	Roughly 1.5, 3.0 and 4.5 mm
Sees what it treats	No	Yes — imaging before firing
Comfort	Most uncomfortable of the RF arrangements	Pooled mean pain 4.85 of 10

The visualization is a genuine difference rather than marketing: the ultrasound device images the layers before it fires, so the operator is placing energy at a depth they can see rather than inferred.

What each is for

Neither is a lifting treatment in the sense most people mean. Both tighten tissue that is still in place. Neither moves tissue that has descended, and neither adds volume.

Within that:

Monopolar radiofrequency heats broadly, so it is generally described for overall laxity and contour across a region.
Focused ultrasound places energy at chosen depths, including the SMAS, which is the basis for its use on the lower face and neck.

That is as far as the evidence supports a distinction. What it does not support is a confident claim that one outperforms the other for a given face, and no head-to-head trial settles it.

What the numbers actually say

For focused ultrasound, a 2024 meta-analysis of 42 studies: investigators rated 89% of patients improved (95% CI 81–94%), patients rated themselves 84% (95% CI 73–91%), mean pain 4.85 of 10, no serious adverse events reported.

For monopolar radiofrequency, the 2025 review reports a multicentre trial with 83.2% periorbital improvement and eyebrow lifting over 0.5 mm in 61.5% of 86 patients, with satisfaction across studies of 50% to 82%.

Two cautions worth more than the numbers themselves.

The radiofrequency satisfaction range is enormous. Half to four-fifths is not a rounding difference. The reviewers attribute the spread to treatment parameters and operator expertise, not to the technology.

The ultrasound satisfaction figure moves with the question. Pooled satisfaction was 84% — and 62% in the studies that offered a neutral answer instead of forcing a positive or negative. When a clinic quotes a satisfaction percentage, ask how it was asked.

Pain, and what it buys

Depth costs comfort. Monopolar radiofrequency is the most uncomfortable of the radiofrequency arrangements because it is heating a large volume, and it needs surface cooling to protect the skin — with the trade-off that more cooling works against the depth being paid for.

Focused ultrasound is felt most at the deepest settings, and pooled at 4.85 of 10 it sits in the moderate range.

How to actually decide

Not by technology. By these:

What are you trying to change — general laxity across a region, or a specific area like the jawline and upper neck?
What is the operator's experience with the device in front of you? Both bodies of evidence land on operator expertise as the variable that moves outcomes.
What is being claimed? A specific promise about your result is not something either evidence base supports.
Is the device licensed here? Ask for its Korean product name and check it.

If the honest answer to the first question is "tissue has descended", then the answer is neither device, and a page about threads or a conversation about surgery is the right next step.

The bottom line

Thermage heats a large volume of tissue diffusely to around 20 mm; Ultherapy places focused ultrasound at set depths including the SMAS, and images the tissue before firing. Both tighten skin that is in place and neither repositions tissue that has fallen. No trial establishes one as better than the other, published satisfaction for radiofrequency spans 50–82%, and ultrasound satisfaction falls from 84% to 62% when patients are allowed a neutral answer.

Frequently asked questions

Which one is better?: The question does not have a general answer, and a clinic giving you one confidently is telling you about its equipment rather than your face. They differ in how deep the energy goes and how it is placed — diffuse and volumetric for monopolar radiofrequency, discrete and depth specific for focused ultrasound. What should decide it is what you are trying to change.
Which hurts more?: Monopolar radiofrequency is described in the literature as the most uncomfortable of the radiofrequency arrangements, precisely because it heats a large volume. Ultherapy's pooled mean pain score across 42 studies was 4.85 out of 10, and the deeper settings are felt most.
Can I have both?: Clinics frequently propose both, and there is no reason in principle they cannot be combined. The question to ask is what each one is doing in your case — if the answer is "they work well together" without specifics, that is a sales answer rather than a plan.
How reliable are the satisfaction figures?: Less than they look. Published satisfaction for monopolar radiofrequency ranges from 50% to 82% across studies, and Ultherapy's pooled 84% falls to 62% in the studies that let patients answer neutrally rather than forcing a positive or negative. Any single number quoted to you is a selection.
Is Shurink the same as Ultherapy?: Shurink, Ultraformer, Doublo and Liftera are focused-ultrasound devices in the same category as Ultherapy, usually cheaper per session. The pooled evidence is for microfocused ultrasound as a class and does not separate one brand from another.
What if my problem is sagging rather than laxity?: Then neither is the right tool on its own. Both tighten tissue that is where it should be. A thread lift repositions tissue mechanically, and surgery does it properly — a clinic offering an energy device for descended tissue is offering the wrong category.

Medical evidence

Systematic review2024
Microfocused Ultrasound With Visualization (MFU-V) Effectiveness and Safety: A Systematic Review and Meta-Analysis
Investigator-assessed global aesthetic improvement in 89% of patients (95% CI 81–94%), patient-reported 84% (95% CI 73–91%), mean pain 4.85 of 10, and no serious adverse events reported across 42 studies.
Other2025
The Landscape of Radiofrequency Technology for Skin Rejuvenation
"Radiofrequency technology is an integral component of skin rejuvenation, whose efficacy depends critically on the customization of treatment parameters and the expertise of the practitioner."

Sources

Listed in the order they are used. Source class follows the methodology.

1.Microfocused Ultrasound With Visualization (MFU-V) Effectiveness and Safety: A Systematic Review and Meta-Analysis, Aesthetic Surgery Journal, November 2024Peer-reviewed researchaccessed 2026-09-0842 studies from 4,019 references screened. Investigator-assessed improvement 89%, patient-reported 84%, satisfaction 84% overall and 62% where a neutral response option was offered. Mean pain 4.85 of 10; adverse events mild to moderate with none serious.
2.The Landscape of Radiofrequency Technology for Skin Rejuvenation, Health Science Reports, 2025;9(1):e71575Peer-reviewed researchaccessed 2026-09-08Monopolar radiofrequency produces uniform volumetric heating to a penetration depth of up to 20 mm, against 1–4 mm for bipolar, with higher pain and a need for surface cooling. Reports 83.2% periorbital improvement and eyebrow lifting over 0.5 mm in 61.5% of 86 patients, with satisfaction across studies of 50–82%.
3.의료기기 안심책방 (MFDS medical device information portal), Ministry of Food and Drug SafetyGovernment / public bodyaccessed 2026-09-08Where the Korean licence for either device is looked up, under its Korean product name.

Treatments

Concerns it addresses

Related treatments