How we test and score
The rubric, the weights, where the evidence comes from — and, just as important, what this method cannot tell you.
Last updated
Most review sites describe a testing process in the abstract. This page states exactly what our scores are based on, including where they are based on documented design rather than time with the product. If a page on this site claims hands-on testing, that testing happened. Where it did not, we say so, because inventing it would be dishonest and — under the FTC's Consumer Reviews and Testimonials Rule — unlawful.
The rubric
Every espresso machine is scored out of 10 against five criteria. The weights are fixed before scoring and published here so you can re-weight them for yourself:
| Criterion | Weight | What it measures |
|---|---|---|
| Shot control | 25% | Temperature stability and management, pressure behaviour, portafilter standard, stock basket quality, three-way valve or not. |
| Milk performance | 20% | Steam power, wand design and reach, automatic versus manual, how repeatable the result is, recovery time between brewing and steaming. |
| Grinding and workflow | 20% | Built-in grinder quality and adjustment range, dosing accuracy, mess, how many steps stand between beans and a locked portafilter. |
| Build and serviceability | 20% | Materials, parts availability, published repair documentation, known failure points, whether a non-specialist can maintain it. |
| Ease of use | 15% | Warm-up time, how forgiving it is of technique, clarity of controls, cleaning burden. |
Grinders use a separate rubric — burrs 25%, adjustment 25%, retention and dosing 20%, serviceability 20%, noise 10% — stated on that page. Our beginner ranking deliberately re-weights ease of use to 35%, which is why its order differs from the general ranking. Same machines, same evidence, different question.
Where the evidence comes from
- Manufacturer specifications, read from the manufacturer's own current documentation rather than a retailer listing. Retailer listings are frequently out of date or describe a superseded revision.
- Documented design decisions — boiler construction, valve type, portafilter standard, heating method, whether the brew unit is removable. These are the things that determine how a machine behaves, and they are verifiable.
- Parts and repair availability, checked against what the manufacturer actually sells and documents.
- Hands-on use, where we have it. Every page states plainly whether it does.
What this method cannot tell you
Being straightforward about the limits:
- A specification-led score cannot capture how a machine feels to use, or unit-to-unit variation in build quality.
- It cannot detect a reliability problem that only shows up in year three.
- It cannot substitute for a controlled comparison of shots from two machines with the same beans and the same grinder — which is the only way to settle certain arguments.
Where a score depends on something we cannot verify, we leave the claim out rather than estimate it. That is why some spec rows on this site are less detailed than on sites that fill every field.
How we choose what to include
We start from what people are actually buying in a category, screen for machines that are currently available in the US, and exclude anything discontinued or perpetually out of stock — a recommendation you cannot act on is not a recommendation. Products are never included or excluded on the basis of whether they earn a commission. Each ranking lists what else we looked at and why it did not make the cut.
What we do not do
- We do not republish retailer star ratings. Partly because Amazon's program terms do not permit displaying their customer reviews or star ratings outside their own API, and partly because an averaged star rating tells you almost nothing about whether a machine suits you.
- We do not display hardcoded prices. Prices on this equipment move constantly and discount heavily in Q4. A stale number is worse than no number, so we show a price band for planning and link out for the real figure.
- We do not accept product, payment or placement in exchange for coverage or position.
- We do not generate opinions or experiences with AI.
When pages change
Rankings are re-checked when a manufacturer revises a product, when a specification we cited changes, and at minimum before each Q4 season. The "updated" date at the top of a page is the date its content was last verified, not the date a script last touched the file.
Tell us we're wrong
If a specification here is out of date, or you own one of these machines and our characterisation does not match your experience, write to us. We would rather correct a page than defend it.