Quick answer
Which is the better choice overall?
If you have the space and budget, the Saint Bernard's gentle temperament with kids matches the Boston point for point - the deciding factors are really apartment fit and cost, both of which favor the Boston heavily.
Boston Terrier or Saint Bernard? On paper they differ most on apartment suitability, and on the scales Saint Bernard is the heavier at 120–180 lbs. Here is how the two compare on everything that shapes an ordinary week.
This is for someone already down to Boston Terrier and Saint Bernard and deciding between them. For this pair the decision usually turns on apartment suitability and grooming need, so those are covered first and in most detail. Anyone choosing from a flat has a clear answer here: Boston Terrier rates 5/5 against 1/5. It is written for the decision rather than the breed history.
Between Boston Terrier and Saint Bernard, apartment suitability is what separates them, and Boston Terrier is the lower-effort dog of the two to keep.
Choose Boston Terrier if you are in a flat or a smaller home, this is your first dog and you do not want a standing grooming appointment.
Choose Saint Bernard if its temperament and look are what you want; on the measurable axes it gives up nothing to the other.
| Feature | boston terrier | saint bernard | Winner |
|---|---|---|---|
| Size class | small | giant | Equal |
| Weight | 12–25 lbs | 120–180 lbs | Equal |
| Height | 15–17 in | 26–30 in | Equal |
| Lifespan | 11–13 years | 8–10 years | boston terrier |
| Exercise need | Low (2/5) | Low (2/5) | Equal |
| Grooming need | Very low (1/5) | Moderate (3/5) | boston terrier |
| Shedding | Low (2/5) | High (4/5) | boston terrier |
| Energy level | Moderate (3/5) | Low (2/5) | Equal |
| Barking | Low (2/5) | Low (2/5) | Equal |
| Apartment suitability | Very high (5/5) | Very low (1/5) | boston terrier |
| Good for first-time owners | Very high (5/5) | Moderate (3/5) | boston terrier |
| Tolerates being alone | Moderate (3/5) | Moderate (3/5) | Equal |
| Trainability | High (4/5) | Moderate (3/5) | boston terrier |
| Good with kids | Very high (5/5) | Very high (5/5) | Equal |
| Good with other dogs | High (4/5) | High (4/5) | Equal |
| Friendly to strangers | High (4/5) | High (4/5) | Equal |
| Cost level | Moderate (3/5) | Very high (5/5) | boston terrier |
| Coat | Short and smooth | Short or long double coat | Equal |
| Origin | Various | Various | Equal |
| Typical monthly cost | $80–$150 | $150–$310 | Equal |
| Typical first-year cost | $1,100–$2,300 | $2,200–$4,200 | Equal |
This is the most extreme size gap on the site. The Boston weighs 12-25 lbs; the Saint Bernard runs 120-180 lbs, up to seven times heavier, and stands 26-30 inches against the Boston's 15-17. Size class says it plainly: small versus giant, and that scale gap is worth sitting with before you fall for the Saint Bernard's reputation alone.
Despite the size difference, exercise need actually ties at low (2/5) for both breeds - Saint Bernards are famously laid-back for their size, more couch companion than athlete. Energy level runs slightly higher for the Boston day to day (3/5 vs 2/5), which can be a surprise given how much bigger the Saint Bernard is. Do not assume a giant breed needs giant amounts of exercise; this pair is the clearest counterexample on the site.
Grooming favors the Boston (1/5 vs 3/5, moderate), and shedding does too, more sharply - the Saint Bernard rates 4/5, high, against the Boston's 2/5. A giant breed's coat simply produces more hair by volume, even at a moderate shedding rate per square inch, so expect a heavier daily cleanup with the Saint Bernard. Both short and long-coated Saint Bernards fall under this same shedding rating.
The gap here is stark - the Boston rates 5/5 for apartment suitability, the Saint Bernard just 1/5, very low. Barking ties low for both (2/5), so it is purely a space issue: a 150+ lb dog needs room to turn around that most apartments do not offer, regardless of how quiet or calm the dog itself is.
The Boston trains a bit more easily (4/5 vs 3/5) and rates notably higher for first-time owners (5/5 vs 3/5). A giant breed like the Saint Bernard needs early obedience work simply because its adult size makes bad habits, like pulling or jumping, far harder to manage than they would be on a small dog. A well-trained giant breed is a joy to live with; an untrained one is genuinely difficult to handle.
Both breeds tie at 5/5 with kids, 4/5 with other dogs, and 4/5 with strangers - genuinely comparable temperaments once you look past size. The Saint Bernard's reputation for gentleness with children holds up in the numbers here, matching a small breed's score point for point despite the enormous size gap. Supervision still matters with any dog this large around small children, temperament aside.
The Boston lives notably longer, 11-13 years against the Saint Bernard's 8-10, a common pattern for giant breeds. The Saint Bernard's health list includes hip and elbow dysplasia, dilated cardiomyopathy, entropion and bloat, the last one a particular risk for large, deep-chested dogs and worth knowing about before you commit. Ask a breeder or rescue about cardiac and joint screening history before bringing one home.
Keeping a Saint Bernard costs meaningfully more: $150-310 monthly against the Boston's $80-150, and $2,200-4,200 in the first year versus $1,100-2,300, nearly double at the top end. Food volume for a 180 lb dog is the obvious driver, but larger vet bills and bigger everything, crates, beds, medication doses, add up too. Factor those recurring costs in alongside the shorter expected lifespan when you budget long term.
Boston Terrier weighs 12–25 lbs and lives 11–13 years; Saint Bernard weighs 120–180 lbs and lives 8–10 years. The two diverge most on apartment suitability, grooming need and shedding and 2 other rated axes. They are level on tolerates being alone, barking and good with other dogs, so those cannot decide it. In the table, a "winner" means easier for an ordinary household — not better. Size, coat and origin are recorded without a verdict. Because both breeds are scored the same way, the gaps are reliable even where the absolute numbers are rough.
Enormously - up to 180 lbs versus the Boston's 25 lb ceiling, roughly seven times the weight. This is a small breed against a giant one.
No, surprisingly - it ties the Boston at low exercise need (2/5). Saint Bernards are a calm, low-energy giant breed despite their size.
Not really - it rates just 1/5 for apartment suitability against the Boston's 5/5. Size is the limiting factor here, not activity level or noise.
Both tie at 5/5 - Saint Bernards have a strong reputation for gentleness with children that holds up in this data.
$150-310 a month and $2,200-4,200 in the first year, against the Boston's $80-150 monthly and $1,100-2,300 first-year range.
The Boston, by a good margin - 11-13 years versus the Saint Bernard's 8-10, typical for a giant breed.
Hip and elbow dysplasia, dilated cardiomyopathy, entropion and bloat - the last is a genuine emergency risk in large, deep-chested dogs and worth discussing with a vet in advance.
If you have the space and budget, the Saint Bernard's gentle temperament with kids matches the Boston point for point - the deciding factors are really apartment fit and cost, both of which favor the Boston heavily.
The Saint Bernard runs $150-310 against the Boston's $80-150 - close to double.
No - both breeds tie at low exercise need (2/5), which surprises a lot of people given the size difference.
The Boston Terrier, at 11-13 years versus the Saint Bernard's 8-10.
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Health information here is general and is not veterinary advice. If your dog shows pain, sudden behaviour change, or worsening symptoms, consult a licensed veterinarian.
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