Ratio Six (Series 2).

The Gavler Review.

Ratio Six (Series 2) Review: Design-First Coffee That Doesn't Cut Corners on the Brew

The Ratio Six Series 2 ranks third on our Best Coffee Makers list with a 9.3, and it gets there on a premise most drip machines don't even attempt: that a coffee maker should look like it belongs on the counter, not just perform well hidden in a cabinet. Buy it if you want a genuinely beautiful machine that doesn't sacrifice brew quality to get there — the Series 2's new thermal carafe and 5-year warranty close the practical gaps that dinged the original Six. Skip it if you want programmable brew settings or the industry's most decorated single-cup benchmark; that's the Technivorm Moccamaster KBGV at rank one.

What it actually is

Ratio is a Portland, Oregon company that designs and assembles its machines in-house, and the Six is its flagship home brewer — a single-serve-to-eight-cup drip machine built around one central design decision: intentional simplicity. There's one switch, one fixed brew temperature (200°F), no programming, no app, no bloom-time menu. Water heats, passes through a precision-engineered spray head over the grounds, and stops when the 40-ounce carafe is full. Ratio's editorial stance is that the correct brew temperature has been settled science for decades, and that the home brewer's actual job is sourcing good beans and grinding them correctly — not fiddling with variables a fixed-temperature machine already gets right.

Series 2, current as of 2026, is a refinement rather than a redesign. The most significant change is materials: the original Six used a borosilicate glass kettle, and Series 2 replaces it with an insulated stainless thermal carafe that holds brewed coffee at temperature for roughly 90 minutes without a hot plate slowly cooking it toward bitterness — the classic failure mode of glass-carafe drip machines left on a warmer. The body comes in satin stainless or matte black powder-coat, with a hardwood handle available in walnut, white oak, or charred white oak. At $359, and backed by a 5-year warranty, it's priced and warrantied like a machine Ratio expects to outlast the standard kitchen-appliance replacement cycle.

In use

The single-temperature philosophy is the thing to understand before anything else, because it determines whether this machine is right for you. There's no interface to learn — no LCD menu, no phone app, no adjusting bloom time between roasts. Wirecutter's take captures both the design and the practical payoff: "The Ratio Six is the most beautiful coffee maker you can put on a kitchen counter. The Series 2 thermal carafe closes the only complaint I had with the original." That's the arc of this machine in one sentence — a design-forward brewer whose one real functional weakness has now been fixed.

The thermal carafe change is the part that actually affects the cup, not just the aesthetics. A glass carafe on a hot plate keeps degrading coffee for as long as it sits there; a sealed, insulated stainless carafe holds temperature passively, so the coffee you pour at the 60-minute mark tastes close to what you poured at minute five. Gear Patrol frames the Series 2 update in exactly those stakes: "Series 2's thermal carafe and 5-year warranty turn the Six into a buy-it-for-life machine that happens to also look incredible." Cool Hunting's assessment of the fixed-temperature approach reinforces the same point from a different angle: "Pure single-temperature precision with no programmable distractions — Ratio's restraint is the feature." And for buyers weighing this against a machine that blends into the counter, Dwell's line is the most direct: "If you care about how your kitchen looks, the Ratio Six is the only coffee maker that earns its counter space."

Where it shines

• Materials and finish that hold up. Satin stainless or matte black with a real hardwood handle accent — walnut, white oak, or charred white oak — is a genuinely different tier of kitchen-counter presence than the plastic-and-glass norm in this category.
• A carafe that fixed the real weakness. The Series 2 thermal carafe replaces glass-on-hot-plate with insulated stainless that holds temperature roughly 90 minutes without degrading flavor — the single biggest functional upgrade over the original Six.
• Built to last, and backed accordingly. Oregon design and assembly, paired with a 5-year warranty, is a rare commitment in a category where most machines ship with one or two years of coverage.
• A coherent design philosophy, not a missing feature. The lack of programming isn't an oversight — it's Ratio's stated position that a correctly engineered fixed temperature beats a menu of settings most people won't tune correctly anyway.

The trade-offs — who should skip it

This is the aesthetics-first pick on the list, not the most feature-rich or the most decorated by formal coffee-industry certification, and the honest reasons to buy something else are specific:

• You want programmable control. There's no bloom-time adjustment, no pulse-brew mode, no scheduling. If you want to tune brew variables by hand, this machine's entire design philosophy works against you.
• You care about SCA certification specifically. The scoreNote on this product is candid: coffee-spec purists note the Six lacks formal Specialty Coffee Association certification, even though its fixed 200°F brew temperature sits in the range that certification exists to validate.
• You want the category's longest track record. The Technivorm Moccamaster KBGV at rank one is the more established benchmark for brew quality, with decades of reviewer consensus behind it — if that pedigree matters more to you than industrial design, it's the safer default.

How it compares

The Technivorm Moccamaster KBGV at rank one is the category's long-standing quality benchmark — reliably excellent coffee in a more utilitarian, powder-coated body. The Fellow Aiden Precision at rank two sits between them: a tech-forward, app-connected brewer for buyers who want programmability the Ratio deliberately omits. The Six's case against both is aesthetic conviction — it's the machine for someone who has decided that how the kitchen looks is part of how the coffee tastes, and who wants a five-year warranty and a thermal carafe to back that decision up.

The Gavler verdict

A 9.3, with an expert score of 90 and a community score of 93 — a rare case where owners rate the Six even more highly day to day than critics do on first impression, a good sign for long-term satisfaction. The Ratio Six Series 2 is a coherent product: a company that decided the right brew temperature is a solved problem, and spent its engineering budget instead on materials, warranty, and a thermal carafe that finally matches the rest of the machine's ambition. Buy it if your kitchen counter is part of the decision. Buy the Moccamaster if it isn't.

Common Questions

Is the Ratio Six Series 2 worth it in 2026?

For buyers who want a coffee maker that looks as good as it brews, yes. It ranks third on Gavler's Best Coffee Makers list with a 9.3, and the Series 2's upgraded thermal carafe closes the main practical complaint reviewers had about the original. At $359 it's a genuine investment, backed by a 5-year warranty and Oregon assembly — buy it if design and materials matter to you as much as the cup; buy the Technivorm Moccamaster instead if you want the single-cup-quality benchmark without the industrial-design premium.

What changed between the original Ratio Six and the Series 2?

The headline change is the carafe: Series 2 replaces the original's borosilicate glass kettle with an insulated stainless thermal carafe that holds brewed coffee at temperature for roughly 90 minutes without a hot plate slowly degrading the flavor, which is the classic weakness of glass-carafe drip machines. Gear Patrol called this the update that "turns the Six into a buy-it-for-life machine that happens to also look incredible."

Does the Ratio Six have programmable settings or a app?

No, and that's deliberate. The Six brews at a single fixed 200°F temperature with one switch — no menus, no bloom-time adjustment, no app. Ratio's position is that the correct brew temperature is settled science, and the brewer's job is to source good beans and grind them properly rather than fiddle with variables. Cool Hunting summed it up as "pure single-temperature precision with no programmable distractions — Ratio's restraint is the feature."

Ratio Six or Technivorm Moccamaster KBGV?

Buy the Moccamaster if you want the category's longest-standing benchmark for brew quality and don't mind its more utilitarian, powder-coated aesthetic. Buy the Ratio Six if the kitchen-counter look matters as much as the cup — satin stainless or matte black with a hardwood handle, a 5-year warranty, and a thermal carafe that doesn't need a hot plate. Both brew excellent coffee; the decision mostly comes down to how much you weigh design.