#1: AddMotor GAROOTAN M-81 ($1,199 as of Sep 28, 2:10 PM EDT, subject to change): best overall
Read the full AddMotor M-81 review. Why it wins #1: it's the only established-brand cargo bike on Amazon US. AddMotor is US-based (Glendora CA, founded 2003), which matters for warranty and parts availability where most budget cargo brands are overseas storefronts with email-only support. The hardware is the right kind for kid-hauling: 750 W rated hub motor with 80 Nm torque (pulls a loaded bike away from a stop without struggle), hydraulic disc brakes (the right call for a heavy bike with a 100+ lb payload going downhill), a passenger-capable rear deck with seat, and UL 2849 certification for indoor charging.
Pick this if: the bike is replacing a second car for school runs + groceries and you want a brand that answers the phone. Skip if: your route has sustained 8%+ climbs. It's hub-motor: fine for flat-to-rolling, strained on real hills with full payload.
#2: SISIGAD Family E-Bike ($899.99 as of Sep 28, 2:10 PM EDT, subject to change): payload champion
Read the full SISIGAD Family E-Bike review. The SISIGAD Family is the only pick here that arrives as a kid-hauler: the rear child seat and foot guards are factory-integrated on a reinforced deck, so there is no third-party seat to buy and no rack rails to match. It carries a 450 lb total payload, the highest of the three, on dual hydraulic disc brakes, with a 750 W rated / 1500 W peak rear hub, a removable 48 V × 15 Ah (720 Wh) battery, UL 2849 system certification, 20 × 3-inch fat tires, a front suspension fork and a low step-through frame.
Pick this if: you are carrying one small child and want a bike that is ready on day one. Skip if: you need to carry two kids, because the integrated seat suits one child. Assist is cadence-based rather than torque-sensed, support runs through the Amazon seller rather than a US dealer, and its review plans on 30 to 45 miles with a child aboard against the 60 advertised. Keep it in its Class 2 (20 mph) setting whenever a child is on the back, as its review recommends.
#3: EUYBIKE 2-Seater ($799.99 as of Sep 28, 2:10 PM EDT, subject to change): best budget
Read the full EUYBIKE 2-Seater review. The budget entry is the true two-up bike: an extended frame with a genuine passenger bench and foot pegs, so an older child rides behind you rather than in a small child seat. 750 W rated / 1450 W peak, 82 N·m torque, a 960 Wh removable battery (joint biggest on this list with the M-81's), dual suspension, dual disc brakes, IP67 weather sealing, and a 4.2★ Amazon owner rating. Two honest cautions from our review: plan 30–45 loaded miles rather than the 80-mile headline, and keep the speed limiter at 28 mph for public roads. The advertised top speed exceeds the Class 3 limit out of the box.