Brand Overview
Master Spas — Indianapolis-built brand offering strong value with the LSX, Twilight, Healthy Living, and Clarity series. Owns the Michael Phelps Legend Series.
Bullfrog — Launched in 1996 around a single big idea: the JetPak Therapy System. Each seat houses a swappable therapy module buyers choose (and can change later).
Master Spas is independent and privately held, manufactured in Fort Wayne, Indiana, and primarily targets buyers who want maximum jet count and feature density per dollar. Bullfrog is independent — Bullfrog Spas Inc., manufactured in Herriman, Utah, and primarily targets buyers who want per-seat therapy customization and fewer plumbing leak points. That ownership and manufacturing context shapes everything that follows — parts availability, dealer density, and how each brand approaches engineering trade-offs.
Price Comparison
Both brands compete on overlapping price bands. Pricing varies significantly by dealer, region, and time of year — visit each model page for live buyer-reported pricing.
Two popular models compared on specs:
| Spec | Master Spas LSX 850 | Bullfrog M8 |
|---|---|---|
| Seating | 6 | 6 |
| Loungers | 0 | 2 |
| Jets | 59 | 84 |
| Pumps | 3 | 3 |
| Dimensions (L × W × H) | 94"x94"x38" | 94"x94"x38" |
| Water Volume | 395 gal | 474 gal |
| Voltage | 220V | 220V |
| Therapy Intensity (1–5) | 5 | 3 |
| Insulation Tier (1–3) | 3 | 3 |
| Saltwater Compatible | Yes | No |
| Warranty | 5 Years Parts and Labor | 5 Years Parts and Labor |
*Prices reflect what real buyers report. See Master Spas LSX 850 pricing → · See Bullfrog M8 pricing →*
Sticker price is only part of the equation. Budget another $300–$800 for delivery and crane work, $500–$1,200 for a dedicated 50A electrical run, and $150–$300 each for a cover lifter and steps. Master Spas dealers more commonly bundle delivery and the EcoPur Charge mineral system as standard, while Bullfrog dealers more commonly bundle delivery and a free JetPak upgrade or two — ask the dealer to itemize what's included in the quote before comparing the headline price.
Build Quality
Master Spas uses Acrylic shells with EcoPur Charge mineral water care standard and full-foam insulation on premium series.
Bullfrog uses EnduraFrame structural base, ProGuard synthetic cabinet, and simplified plumbing that eliminates most lines in a conventional spa — reducing leak risk.
Edge: Tie — both deliver premium-grade construction.
Jet Systems
Master Spas: High jet counts at competitive prices — flagship LSX models routinely exceed 70 jets with strong massage zones.
Bullfrog: The JetPak Therapy System is genuinely unique — every seat is a removable cartridge (Wellspring, JetStream, Oasis, etc.) you can reconfigure later.
Energy Efficiency
Master Spas: Full-foam insulation on LSX/Twilight series; mid-pack efficiency that improves significantly on the top trims.
Bullfrog: Reduced plumbing means less water volume and less heat-loss surface area — modestly better than competitors with otherwise similar insulation.
Our Verdict
Choose Master Spas if: you want maximum features and jet count per dollar, or you like the Master Spas mineral water system.
Choose Bullfrog if: different household members want different therapy styles, you want fewer plumbing leak points, or you want a tub you can re-tune years from now.
Both are excellent picks — neither will disappoint. Compare specific models side-by-side →