Bullmastiff vs Great Dane: Which Is Right for You? (2026)
Quick verdict: Both are large guardian breeds. Great Danes are taller and more athletic; Bullmastiffs are more powerfully built and more natural guardians.
At-a-Glance Comparison
| Trait | Bullmastiff | Great Dane |
|---|---|---|
| Size | 100-130 lbs | 100-200 lbs |
| Lifespan | 7-9 yrs | 7-10 yrs |
| Energy Level | Low-Moderate | Moderate |
| Trainability | Good | Good |
| Good with Kids | Very Good | Very Good |
| Grooming | Low | Low |
| Avg. Puppy Price | $1,000-$2,500 | $1,000-$3,000 |
History
Bullmastiffs were English estate guardians created from Mastiff-Bulldog crosses. Great Danes were German boarhounds.
Size
Great Danes are taller—some of the world’s tallest dogs. Bullmastiffs are stockier and more powerfully built.
Guarding
Bullmastiffs are more instinctive guardians—originally trained to silently pursue and pin poachers without biting.
Temperament
Both are gentle with families despite their size. Great Danes are more playful; Bullmastiffs are more stoic.
Exercise
Great Danes need more exercise. Bullmastiffs are lower energy.
Lifespan
Both have tragically short lifespans—7-10 years is typical for both giant breeds.
Frequently Asked Questions
Which is a better guard dog?
Bullmastiffs are more instinctive guardians.
Which is taller?
Great Danes are significantly taller.
Which lives longer?
Great Danes average slightly longer despite being larger.
Which is better with children?
Both are gentle giants—either is good with children.
What should I know about giant breed costs?
Both cost $2,000+/year in food plus significantly higher vet costs than average breeds.
- [Bullmastiff supplies](https://www.chewy.com/s?query=bullmastiff) on Chewy
- [Great Dane supplies](https://www.chewy.com/s?query=great+dane) on Chewy
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