So what is a brick backsplash, actually
Start here, because the word brick can mean three different things on a wall, and the price and the work change with each one. A brick backsplash in a kitchen is almost never a full stack of real bricks. Real brick is about three and a half inches thick, and nobody wants that eating four inches off their counter. (A tiler will always clock which kind you have from the doorway. It is a mild affliction and there is no cure.)
There are three flavors. The first is real exposed brick, the old wall of a rowhouse laid bare. The second is thin brick veneer, which is real brick sliced thin, about half an inch, so it glues to the wall like tile. The third is brick-look tile, which is porcelain or ceramic printed and shaped to look like brick. All three read as brick from across the room. Up close, and on your cleaning schedule, they behave very differently.

Real brick, thin veneer, or brick-look tile, and which you actually want
For most kitchens, thin brick veneer or brick-look tile wins, and here is the honest reason: weight and water. Full brick and its mortar are heavy and porous, so behind a working stove they soak up grease and hold onto it. Thin brick veneer keeps the real texture and the real look at a fraction of the weight. A faux brick backsplash, which just means brick-look tile instead of clay, goes one better again on upkeep.
That is because brick-look porcelain absorbs 0.5% water or less (ANSI A137.1), so a splash of pasta sauce wipes off instead of soaking in. You lose a hair of the rough, handmade feel. You gain a backsplash you can clean with a sponge instead of a prayer. If you cook a lot, that trade is usually worth it. If the brick is going on a quiet wall well away from the stove, real thin brick is a joy and I say go for it.
White and whitewashed brick, for people who do not want a pizzeria
Red is not your only option, and this is where a lot of kitchens happily land. A white brick kitchen backsplash keeps all the texture and drops the rustic, wood-fired look. You can buy the brick already white, or you can whitewash it, which is a thinned coat of paint wiped back so the brick still shows through in patches.
A whitewashed brick backsplash in a kitchen is the middle setting between raw brick and a flat painted wall. It brightens a small or dark kitchen, and it hides the color mismatch between bricks that real brick always has. One warning, and it is the same one as ever: white grout behind a stove is a commitment. Seal it, and mean it, or within a year it will quietly map every dinner you have ever cooked.
The wall behind the brick is the part that decides everything
Here is the part nobody photographs. Whatever brick you pick, it is only as good as the wall under it. Gluing brick veneer onto a wavy, dusty, or crumbling wall is how you get tiles that sound hollow when you tap them and pop off within a year. Most people who call me about a failed backsplash do not have a tile problem. They have a wall problem wearing a tile costume.
That is the one strong opinion I will hand you: most people asking about tile actually have a substrate problem, which is just a fancy word for the surface underneath. Brick veneer is heavy, so the mortar has to grab hard. ANSI A108.5 asks for 80% mortar coverage on a dry-area wall like a backsplash, and you only hit that on a wall that is flat and solid. Flatten it, prime it, and then the brick has something real to hold. Tiling a brick wall that is already there gets the same rule: clean, sound, and flat, or it does not get tile.

Sealing and grout, the bit that keeps grease out of the cracks
This is the catch I promised you back in the first paragraph. Brick is porous, and so is the mortar or grout between it. Porous means it drinks whatever lands on it, and behind a stove what lands on it is oil, steam, and the occasional heroic pasta explosion. Sealed brick shrugs all that off. Unsealed brick files it away forever, like a grudge.
So a brick backsplash gets a penetrating sealer, the kind that soaks in rather than sitting on top like a shiny film. Real and thin brick want it most. Brick-look porcelain wants it least, because the tile is already nearly waterproof and only the grout lines need the help. Reseal every year or two, which takes about as long as one episode of anything you like. It is the least glamorous half hour of the whole job, and it is the reason the backsplash still looks good on the day you hand someone the keys.
When a brick backsplash is the wrong call, and you should not hire me
I like brick, but I will talk you out of it when it is wrong for you, because a backsplash you resent is worse than a boring one. If you hate cleaning, and I mean genuinely cannot be bothered, real or thin brick behind a busy stove will wear on you. All that lovely texture is also texture for grease to hide in. Get brick-look porcelain instead, or a smooth tile, and spend your weekends on literally anything else.
Skip it too if your kitchen is sharp and modern, all flat gloss and straight lines, because brick will fight that look rather than join it. Skip it in a tiny galley kitchen, where heavy texture on both walls can close the room in like a hug that went on too long. And if you rent, do not glue thin brick to a wall you have to hand back. In all of those cases the honest answer is a different material, and I would rather tell you that now than cash a check for the wrong wall.
