Aillio Bullet vs Kaffelogic Nano 7e: Batch Size, Profiles, Logs and Which to Buy

The Aillio Bullet and the Kaffelogic Nano 7e are different kinds of roaster: the Bullet is an electric drum machine for batches up to about 1 kg, and the Nano 7e is a fluid-bed machine that roasts 100–120 g by following a saved profile. Choose the Bullet if you roast for a household, friends or small sales and have somewhere to vent smoke. Choose the Nano 7e if you roast for one or two people, want light roasts you can repeat exactly, and work on a kitchen bench.

We roast on a Kaffelogic Nano 7e every week and log every batch (our Nano 7 review covers a year of it). We do not own a Bullet, so the Bullet side of this comparison is based on Aillio's published specifications and what owners report, not on our own roasts.

The comparison at a glance

Batch size decides most of it

Start with how much coffee you drink. A Nano 7e batch of 120 g green gives roughly 85–100 g roasted. For one person drinking two cups a day, that is a few days to a week per roast. A household of three or four heavy drinkers would need several Nano roasts a week, back to back.

The Bullet is built for the other end. A single batch of several hundred grams to 1 kg covers a household for weeks, or a few bags for friends. If you are thinking about selling coffee, the Nano 7e is the wrong machine: its batch ceiling makes the hourly output tiny.

The reverse also holds. A Bullet is not designed for 100 g test roasts. If you want to roast many different coffees in small amounts and compare them, the Nano's small batch is an advantage.

How a roast runs: profile vs hands on

Kaffelogic: the profile does the driving. Every Nano roast follows a profile, a curve of temperature targets over time, and stops at the level you choose. On the Kaffelogic scale a higher level is darker: 2.4 is darker than 2.2. You change the result by choosing a different profile family or moving the level in 0.1–0.2 steps. Because the machine executes the same curve every time, your decisions are the only variable, which makes it a good machine to learn on. Our Kaffelogic Nano 7 profiles guide and the NCT vs F-Series comparison cover which profile to start from.

Bullet: you drive, then you can replay. On the Bullet you control power, fan and drum speed during the roast, watching bean temperature and rate of rise in Roastime. Once you have a roast you like, Roastime can play the recorded roast back as a recipe so the machine repeats your inputs. That gives you drum-roaster control with a way to repeat it, at the cost of more decisions per roast.

Drum and fluid-bed roasting also taste different in general terms: fluid beds heat mainly by hot air and tend toward clarity at light roasts, while drums add heat through contact with the drum and are often chosen for body and medium roasts. Bean, profile and roaster skill matter more than the machine type, so treat this as a tendency, not a rule.

Software and roast logs

Both machines come with good software for running roasts. Neither is a full roast log.

• Kaffelogic Studio edits profiles and shows the live curve. Every roast leaves a .klog file with the full curve, first crack and the profile used. Studio does not keep a searchable batch history, tasting results or green coffee stock. See our Kaffelogic Studio alternative write-up for the details.
• Roastime records Bullet roasts with their graphs and lets you replay them. How you track cupping results, which bag a roast came from and how much green coffee is left is still up to you.

Whichever machine you choose, the habit that improves roasts is the same: write down what you changed, then record how the coffee tasted after it rested. If you own a Kaffelogic, the free Kaffelogic log viewer opens any .klog in your browser and shows the curve, first crack and development time with no account.

Smoke, space and noise

This is often what decides it.

• Nano 7e: small batches of light to medium roasts make modest smoke. Many owners roast under a range hood that vents outside. Darker roasts make more smoke on any machine.
• Bullet: a large batch makes a lot more smoke and chaff. Owners commonly vent it outside with ducting, or roast in a garage or outdoors. Plan the exhaust before you buy.

Both need a stable power supply. Check the Bullet's electrical requirements for your country before ordering.

Who should buy which

If neither fits, the middle of the market has options too: the Fresh Roast SR800 is a hands-on fluid bed for about 225 g, and our best home coffee roaster comparison covers kitchen drum roasters between these two.

Keeping one log across machines

Roasters who move from a Nano to a Bullet, or run both, end up with roasts in two different programs. The BrewedLate roast tracker keeps every roast in one history: import a Kaffelogic .klog directly, or enter any other roast by hand with its weights, first crack and total time. It works out roast loss and rest age, records whether each roast tasted good or which fault it had, and tracks how much of each green coffee is left. Sign up free and log your next roast, whichever machine it came from.

New to roasting? Our home coffee roasting beginner's guide and the guide to first crack cover the basics both machines share.

FAQ

Is the Aillio Bullet better than the Kaffelogic Nano 7e?

Neither is better overall; they suit different roasters. The Aillio Bullet is an electric drum roaster for batches up to about 1 kg, for people who roast for a household, friends or small sales and can vent smoke. The Kaffelogic Nano 7e is a fluid-bed roaster for 100–120 g batches that runs saved profiles automatically, for one or two people who want repeatable light roasts on a bench top.

How much coffee does each roaster roast per batch?

The Aillio Bullet is rated for batches up to about 1 kg of green coffee. The Kaffelogic Nano 7e roasts best at 100–120 g of green coffee, which gives roughly 85–100 g roasted: about a week of coffee for one or two people.

Can both roasters repeat a roast automatically?

Yes, in different ways. The Nano 7e always roasts from a profile, a temperature curve it follows to the level you choose. The Bullet is usually driven by hand with power, fan and drum speed, and its Roastime software can record a roast and play it back as a recipe.

Which is easier to use indoors?

The Nano 7e. Small fluid-bed batches make little smoke at light to medium roasts and can run under a working range hood. A Bullet roasting several hundred grams makes far more smoke and needs an exhaust to outside, a garage or an outdoor space.

How do I keep a roast log for either machine?

Record the bean, green and roasted weights, first crack and total time, the profile or settings you used, and how the coffee tasted after resting. Kaffelogic writes a .klog file for every roast; on a Bullet the roast lives in Roastime. A tracker such as BrewedLate keeps both kinds of roast in one history next to your green coffee stock.