At a Glance #
| Trait | French Bulldog | Boston Terrier |
|---|---|---|
| Size | 16–28 lbs | 12–25 lbs |
| Lifespan | 10–12 years | 11–13 years |
| Energy | Low to moderate | Moderate |
| Ears | Round "bat ears" | Pointed ears |
| Trainability | Moderate — stubborn | Moderate — more willing |
| Health | Significant — BOAS, spine, skin | Better — still brachycephalic |
| Cost | $2,000–$8,000 | $800–$2,000 |
The Quick Answer #
Why Do They Look Alike? (Yes, They’re Related) #
The reason people constantly mix them up is simple: they share ancestry. Both descend from the English Bulldog of the 19th century, which was crossed with terriers to create smaller companion breeds. The Boston Terrier was developed in — you guessed it — Boston, while the French Bulldog was refined in France after English lace workers brought their toy bulldogs across the Channel.
The key visual differences: Frenchies have trademark “bat ears” (round and upright), while Boston Terriers have naturally pointed ears. Frenchies are stockier with more wrinkles. Bostons have a sleeker build, longer legs, and the classic “tuxedo” coat pattern. Once you know to look at the ears, you’ll never confuse them again.
Where They Differ #
Health: This Is the Deciding Factor #
French Bulldogs are a medical minefield — BOAS affects nearly 100% to some degree, spine problems are common, allergies and skin issues are constant, and they can’t handle heat. Bostons are also brachycephalic but much less severely — they breathe better, handle heat better, and have fewer overall health problems. The Boston’s longer snout makes a real difference.
If you want a flat-faced dog with fewer vet bills, get the Boston.
Personality #
Frenchies are Velcro dogs who want to be touching you at all times. They’re clowns but on their own terms — trainability is limited by stubbornness. Bostons are more willing to please, more playful with strangers, and generally easier to live with. Boston energy is slightly higher — they’ll keep up on hikes where a Frenchie would need to be carried.
Cost #
This isn’t close. Frenchies cost $2,000–$8,000 to buy and $1,000–$3,000/year in vet care. Natural mating is nearly impossible — almost all are C-sections and artificial insemination. Bostons cost $800–$2,000 and have more typical veterinary costs. Over a lifetime, a Frenchie costs roughly double.
Which Should You Get? #
Get a French Bulldog if: you want the lowest possible energy, you’re obsessed with the bat-ear look, and you can afford the purchase price AND the ongoing vet bills. You work from home and can manage their health daily.
Get a Boston Terrier if: you want an apartment dog who’s healthier, more trainable, and more affordable. You’d like a dog who can join you on moderate hikes and won’t bankrupt you with vet bills.
Full guides: French Bulldog | Boston Terrier
Sources #
- AKC French Bulldog Breed Standard | AKC Boston Terrier Breed Standard
- Tomlinson et al. (2024), PLOS ONE — BOAS grading data
- McMillan et al. (2024), Scientific Reports — breed lifespan data
- Puppy pricing based on 2025–2026 US breeder market data