Choosing the Right Ratio Machine: A Comparison of the Four Models

Whichever Ratio model you choose is the product of our closest attention to detail, high-quality materials, and commitment to incredible coffee.

At Ratio, we believe that exceptional coffee at home should be intuitive, beautifully designed, and built to last. That’s why our lineup of four unique brewers, the Ratio Four, Six, Eight Original, and Eight Series 2, offers a range of experiences tailored to different coffee lovers. Whether you’re looking for a compact countertop companion or an heirloom-quality centerpiece, this guide will help you discover the Ratio machine that best fits your lifestyle and values.

Compare Ratio Machines.

Ratio Four

Design Ethos
The Ratio Four was designed and engineered as an answer to the waste seen in pod coffee machines. A single-cup brewer with a small footprint that packs the power of our other models. The Four can brew cafe-quality drip coffee with convenience and dependability for a more affordable price point.

Why Choose It
Choose the Four if you prioritize a clean aesthetic, smaller footprint, and intuitive use. Its two brew modes give you control over extraction depending on the size of the batch you’re brewing. It’s perfect for individuals or couples who want top-tier coffee without sacrificing space or style.

Materials Breakdown 

• Water Tank: BPA-free Tritan co-polymer 
• Brew Basket: BPA-free polypropylene
• Carafe: Borosilicate glass
• Removable Shower Head: 304 Stainless Steel with BPA-free polymer housing.
• Structure: Matte finish polymer base with reinforced metal internal structure
• Hot Water Lines: Silicone
• Heating element: Non-coated aluminum

Ratio Six

Design Ethos
Built for daily use and long-term durability, the Ratio Six is the workhorse of our lineup. Its modern stainless steel body, glass internals, and one-button operation give it a no-fuss character, while still maintaining the elegance and precision Ratio is known for.

Why Choose It
If you’re looking for a balance between precision and affordability, the Six is a standout. It brews with the same thermal stability as our more premium models, offers optional plastic-free brewing with the Ratio glass carafe, and comes with a stainless thermal carafe as standard. It’s great for families, shared households, or anyone who wants efficient, excellent coffee.

Materials Breakdown 

• Water Tank: Eastman Tritan TX2001 (BPA- & bisphenol-free; no hot water contact)
• Water Lines: Handblown borosilicate glass (hot water contact)
• Gaskets & Tubing: FDA-approved silicone (hot water contact)
• Shower Head: 304 stainless steel
• Heat Shield: Silicone and BPA-free polymer (minimal hot water contact)
• Brew Basket & Thermal Carafe Lid: BPA-free polymer (hot water contact)
• Heating element: Non-coated aluminum

Ratio Eight Original

Design Ethos
The Ratio Eight Original is where our story began—a bold, architectural statement in the world of coffee brewers. Hand-assembled in Portland, Oregon, using materials like real walnut wood, aluminum, glass, and stainless steel, the Eight is a true marriage of beauty and performance.

Why Choose It
Ideal for those who view their coffee maker as part of their home’s design, the Eight Original offers heirloom quality and artisanal detail. Whether you pair it with a glass or thermal carafe, or add the ceramic dripper attachment, the Eight delivers both exceptional taste and timeless aesthetics. This is the brewer for those who appreciate craftsmanship as much as they love coffee.

Materials Breakdown 

• Water Tank: Eastman Tritan TX2001 (BPA- & bisphenol-free; no hot water contact)
• Water Lines: Handblown borosilicate glass (hot water contact)
• Water Line Connector: BPA-free polysulfone (cold water only)
• Gaskets & Tubing: FDA-approved silicone (hot water contact)
• Shower Head: 304 stainless steel
  Heating element: Non-coated aluminum
• Carafes:
  • Glass: Handblown borosilicate glass (hot coffee contact)
  • Thermal: Stainless steel interior with cast stainless handle/spout 
• Optional Ceramic Dripper: Porcelain, lead- and cadmium-free (hot water contact) 
• Carafe Heat Lid: FDA-approved silicone (hot coffee contact)

Ratio Eight Series 2

Design Ethos
The Eight Series 2 was created for those who demand peak performance without compromising design. We took the legacy of the original Eight and reengineered it with updated internals, dual brew cycle options, and premium stainless steel components that elevate both function and form.

Why Choose It
Choose the Eight Series 2 if you want our most advanced brewing system with total flexibility. Whether you’re brewing full 8-cup batches or a single cup just for yourself, it’s 2 brew recipes carefully adjust the machine's pulse pouring, and bloom time to fit whatever size batch you’re brewing. Along with the added brew recipe, the Series 2 has an all-new redesigned stainless steel flat-bottom dripper for better extraction and increased heat retention.  It’s the definitive choice for coffee enthusiasts who want it all.

Materials Breakdown

• Water Tank: Eastman Tritan TX2001 (BPA- & bisphenol-free; no hot water contact)
• Water Lines: Handblown borosilicate glass (hot water contact)
• Gaskets & Tubing: FDA-approved silicone (hot water contact)
• Shower Head: 304 stainless steel
• Brew Basket + Catcher: Double-wall stainless steel (hot water contact)
• Heating element: Non-coated aluminum
• Carafes:
  • Glass Carafe + Lid: Handblown borosilicate glass (hot water/coffee contact)
  • Thermal Carafe: Stainless steel interior with cast stainless handle/spout (hot coffee contact)
  • Thermal Carafe Lid: FDA-approved silicone (hot water/coffee contact)