Moreborn MB4 vs Mill Kitchen: Which Electric Composter Wins?
Share
Two very different philosophies: Moreborn MB4 is a one-time purchase with no subscription. Mill requires $399 upfront plus $33/month ongoing. This comparison breaks down which is actually worth it for your household.
Quick Comparison
| Feature | Moreborn MB4 | Mill Kitchen Bin |
|---|---|---|
| Price (upfront) | $329 | $399 |
| Subscription | None | $33/month (required) |
| 5-year total cost | ~$540 | ~$2,480 |
| Capacity | 4L | 10L |
| Processing time | 4 hours (Disposing) / 24h (Composting) | 4–8 hours |
| Noise level | 38dB | ~45dB |
| Filter cost | ~$40/year | Included in subscription |
| Food scraps pickup | No | Yes (select cities only) |
| Output ownership | You keep it | Collected for chicken feed (if pickup available) |
| Warranty | 1 year | 1 year |
| Trial period | 90 days | N/A |
Cost Comparison: The Real Numbers
| Year | Moreborn MB4 | Mill (with subscription) |
|---|---|---|
| Year 1 | $329 + $40 filters + $36 electricity = ~$405 | $399 + $396 subscription = $795 |
| Year 2 | $40 + $36 = ~$76 | $396 = $396 |
| Year 3 | ~$76 | $396 |
| Year 4 | ~$76 | $396 |
| Year 5 | ~$76 | $396 |
| 5-Year Total | ~$679 | ~$2,379 |
Winner: Moreborn MB4 — approximately 3.5x cheaper over 5 years.
Capacity: Which Size Do You Need?
| Moreborn MB4 | Mill | |
|---|---|---|
| Capacity | 4L | 10L |
| Cycles possible per day | 2–3 (4h cycle) | 1–2 (4–8h cycle) |
| Effective daily throughput | Up to ~6L | ~10L |
| Best household size | 1–3 people | 4–6 people |
Winner: Mill for large families; MB4 for typical 1–3 person households — and MB4's faster 4-hour cycle means you can run multiple loads per day.
Mill's Subscription: What You Actually Get
Mill's $33/month membership includes:
- Filter replacements (as needed)
- Customer support
- Food scraps pickup service — only available in select US cities
- "Mill Money" credits toward chicken feed
Critical note: If food scraps pickup is not available in your area, you keep the output yourself — the same as MB4 — but you're still paying $33/month for filter replacements and support that MB4 users cover for ~$40/year.
Processing Time
| Scenario | Moreborn MB4 | Mill |
|---|---|---|
| Morning scraps | Done by lunch (4h) | Done by afternoon/evening (4–8h) |
| Runs per day possible | 2–3 | 1–2 |
| Weekend batch | Multiple cycles, very flexible | One large load |
Winner: MB4 for speed and flexibility.
Who Should Choose Which?
| Choose Moreborn MB4 if... | Consider Mill if... |
|---|---|
| You want to own your device outright | You live in a Mill pickup city and want zero output hassle |
| You're cost-conscious long-term | You have 4–6 people generating waste |
| You want fast 4-hour processing | You want a larger single-load capacity |
| You want to use your output in your garden | You prefer an all-inclusive subscription |
| You have 1–3 people in your household | You don't mind ongoing monthly fees |
MB4 vs Mill: Key Facts
- Moreborn MB4 price: $329 one-time; ~$679 total over 5 years
- Mill price: $399 upfront + $33/month subscription; ~$2,379 over 5 years
- Capacity: MB4 = 4L | Mill = 10L
- Processing time: MB4 = 4 hours (Disposing mode) | Mill = 4–8 hours
- Noise: MB4 = 38dB | Mill = ~45dB
- Mill food scraps pickup: Only available in select US cities — check availability before subscribing
- MB4 trial period: 90 days risk-free
Pricing and features current as of March 2026. Mill subscription pricing subject to change.
