Equipment comparison · Skin tightening

Thermage FLX vs Ultherapy PRIME: Which Should Your Practice Buy?

Images: Solta Medical and Merz Aesthetics. Confirm the configuration in your quote.

Thermage vs Ultherapy is usually a patient question. For a practice, it is a purchase decision between two skin-tightening platforms with different FDA claims: what each is cleared for, what every treatment costs in supplies, and what to confirm before you buy.

Darryl H.Facts checked November 8, 2026Equipment comparison

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The short answer

They are cleared for different claims. Ultherapy PRIME’s FDA clearances include lifting the eyebrow and lax tissue under the chin and on the neck, with imaging to 8 mm. Thermage FLX’s clearance covers wrinkles, including the upper and lower eyelids. It does not use lift wording.
Both cost money every treatment. Thermage FLX uses a single-use tip plus return pads, coupling fluid and cryogen. Ultherapy PRIME uses transducers that each deliver a set number of treatment lines.
No study we reviewed establishes a winner between today’s models. One small 2019 split-face trial compared the two technologies and found no statistically significant difference on its reported measures. That does not show they are equivalent.

Thermage vs Ultherapy side by side

	Thermage FLX (Solta Medical)	Ultherapy PRIME (Merz Aesthetics)
Energy	Monopolar RF at 6.78 MHz, heating through the skin	Microfocused ultrasound that creates small points of thermal coagulation below the skin
Seeing the tissue	No imaging; AccuREP tunes energy delivery to each patient (Solta)	DeepSEE imaging up to 8 mm to confirm contact and depth, for example to avoid bone
FDA-cleared uses	Non-invasive treatment of wrinkles, including periorbital wrinkles on the upper and lower eyelids. With vibration: temporary improvement in the appearance of cellulite, relief of minor muscle aches and improved local circulation (K170758)	Lift the eyebrow; lift lax tissue under the chin and on the neck; improve lines on the décolleté; improve the appearance of skin laxity on the abdomen and arms (2025) and knees (2026)
Handpiece	One handpiece for face, eyes and body; only the tip changes	Interchangeable transducers for different treatment depths
Paid for every treatment	Single-use tip (Total Tip 4.0 or 3.0, Eye Tip 0.25, Body Tip 16.0), return pad, coupling fluid, cryogen and marking grid	Transducer lines; each transducer delivers a set number before replacement
Comfort	Cryogen cooling with built-in vibration	Plan a pain-management protocol and budget its supplies
Buying used	Solta states it does not authorize US third-party resellers and need not support products bought from them. Without support, a console may not be able to get tips	Confirm PRIME or the earlier console, the software for the newer body areas and transducer line counts
New-system price evidence	Solta does not publish prices, and we found no reliable public price for a new Thermage FLX. Ask for the console price and a tip price list together	Merz does not publish prices, and we found no reliable public price for a new Ultherapy PRIME
Evidence reviewed	One study of Thermage FLX, combined with Clear + Brilliant, with no FLX-only group	FDA’s 2026 knee summary cites three published Ulthera System studies (44 subjects); one small split-face trial against monopolar RF predates PRIME

Which practices should shortlist each?

Shortlist Ultherapy PRIME if

The service you plan to offer is lifting the brow, under the chin and the neck, and you need clearance language that supports that wording.
You want providers to see the treatment depth on screen before each line.
You plan to treat the newer cleared body areas: abdomen, arms and knees. Confirm the console runs the software for them.

Shortlist Thermage FLX if

You want one needle-free handpiece across face, eyes and body for wrinkle treatments, including the eyelids within its labeling.
Your patients already ask for Thermage by name, and you can price each treatment to cover its tip and supplies.
You will buy new, or with Solta’s written support for the serial number. Solta’s resale statement makes an unsupported used console a real risk.

A third option for a Thermage-style service is Jeisys Density. Its first FDA clearance named Thermage FLX as the predicate. A predicate relationship does not establish identical clinical results or operating costs.

What can you tell patients?

Thermage FLX

FDA’s wording for Thermage FLX is wrinkles and rhytids. It does not say tightening or lifting.
If your menu says “Thermage skin tightening”, keep the claims close to the cleared uses, and have your medical director review the wording.

Ultherapy PRIME

Ultherapy’s clearances use lift language for the brow, under the chin and the neck.
Its body indications are newer: abdomen and arms in 2025, knees in 2026.
The 2024 PRIME record (K233996) covers console changes. The treatment technology and the core face and neck uses match the earlier Ulthera System.

Consumable costs per treatment

Both systems charge you for supplies on every treatment. Start with those, then add the rest of the appointment.

	Thermage FLX	Ultherapy PRIME
Consumables per treatment	Tip price + return pad + coupling fluid + cryogen + marking grid	Lines used × cost per line, by transducer, + comfort supplies
What to get in writing	The price and pulse count of every tip you will use. Solta says the Total Tip 4.0 treats up to 25% faster than the 3.0, so price both	Each transducer’s line count and replacement price

Consumables are only part of each treatment’s cost. Add provider time for the complete appointment. Then compare what each treatment contributes after supplies and variable staffing, alongside your fixed monthly commitments: the loan or lease payment, the service plan and any minimums. In a monthly cash view, count the equipment once, as the financing payment or as depreciation, not both.

Run each system through a treatment plan your clinical lead considers appropriate, with the full appointment time. Comparing a face-and-neck plan on both does not make their cleared indications interchangeable.

Your next step

Compare the Thermage and Ultherapy quotes line by line.

Enter each quote: console price, financing, service plan and supplies.
Use the same appointment mix for both, so the totals compare fairly.
See which quote leaves costs out before you sign.

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If you are considering used equipment

Neither company publishes a new-system price, so a used listing is not a stand-in for a new-system quote.

Thermage FLX: one US dealer listed a unit at $64,950 (asking price, checked November 8, 2026). The listing did not show the year, the included tips or Solta’s support status.
Ultherapy PRIME: we found no current dealer listing.

A single asking price is not a market price. For Thermage especially, a used console is only worth its price if Solta will sell tips and service for that serial number. Get that answer in writing before you pay.

Evidence reviewed

This is the evidence that bears on the buying decision, from our source review. It is not a complete literature search.

The comparative trial

A 2019 randomized, evaluator-blind, split-face trial treated 20 people with mild to moderate laxity: microfocused ultrasound with visualization on one side of the face and monopolar RF on the other, followed for six months. Both sides improved, and the trial found no statistically significant difference between them on its laxity scale.

A small trial without a significant difference does not show the two are equivalent, or that today’s FLX and PRIME consoles perform alike. The ultrasound arm predates PRIME, and the abstract does not name the RF device.

Thermage FLX

One study gave one FLX treatment followed by four Clear + Brilliant Touch sessions and reported 77% responders at six months. Both devices are Solta products, and there was no FLX-only group, so the result can’t be credited to FLX alone.

Ultherapy

FDA’s summary for the 2026 knee indication (K260618) cites three published studies of the Ulthera System for knee laxity, with 44 subjects in total. They were found through a literature search, not run as new trials.

Safety and training

A 2018 case series described five patients with blistering, ulceration, tissue atrophy or skin necrosis after single microfocused ultrasound sessions with Ultherapy. The authors call serious events rare but possibly underreported. A case series can’t measure how often such events happen, and it doesn’t compare the two systems. Both are energy-based devices with their own warnings and training needs, so ask each company for its complication guidance, training plan and consent materials.

Questions to ask both companies

Is this new equipment with a full manufacturer warranty? For a used unit, will the manufacturer sell supplies and service for this serial number? Please confirm in writing.
Thermage: which tips are included, how many pulses does each hold, and what do replacements cost? What do return pads, coupling fluid and cryogen cost per treatment?
Ultherapy: which transducers are included, how many lines does each deliver, and what do replacements cost? Does the console run the software for the newer body areas?
For a treatment plan our clinical lead considers appropriate, what are the supplies and the complete appointment time?
How many training days are included, for how many providers? Is there support for treatment planning and comfort protocols?
What does the warranty cover, and what does service cost after it ends?
What is the total with tax, freight and financing fees?

Our take: how should you choose?

Choose the service you can deliver and support well, then compare its economics. Thermage FLX fits when wrinkle treatment, including the eye area within its labeling, is what your patients want and your providers can deliver. Ultherapy PRIME fits when brow, under-chin and neck lifting indications and ultrasound visualization match the service you intend to offer.

For either, ask for a treatment plan your clinical lead considers appropriate, the consumables it uses and the complete appointment time. Compare collections after supplies and variable staffing, then account for service, financing and realistic demand. Confirm manufacturer support before you commit, especially for a used console.

The small comparative trial does not establish a winner between these current models. The stronger purchase is the one your practice has the demand, training, delivery capacity and financial plan to use well.

Document-based buying analysis. Not a NuWays MD hands-on test of either system.