Had a delivery for dinner, we tried once and won’t order again. If you’re somebody who is used to eating tasty and great quality vegan burgers or other meals, you’ll be disappointed in the end, just like we were. If you’re fine with McDonalds’ level, go for it, but consider the extra price you pay for nothing. The biggest problem is that the burger is very far from good. It’s dry, both the bread and the steak, feels like a chewing gum and it has an unpleasant after taste. The sauce inside is trying to help but it’s taste has no support from the other ingredient because there’s almost nothing else. Apart from some sad piece of salads, there’s no replacement for cheese, maybe tomato, onion or pepper or mushrooms or pickles or aubergine or avocado or… anything that is vegetable. A dry chewy vegan steak between two dry pieces of bread, with some soggy pieces of salad for 12€. I’d rather buy next time the ingredients in a supermarket and make my own. BUT, I’m not a restaurant. It’s hard to imagine how can you be satisfied with this quality when in general you’re trying to promote something good? It’s a responsibility and with this mentality it will be hard to convince a bigger audience to choose vegan over real meat. I hope they can improve otherwise it’ll scare people away from vegetarianism.

Solidly good! These burgers are large with really delicious toppings and sauces. I love the seitan steak, but haven't tried the breaded soy patty (although I would love to seeing as everything else was good). The employees are very friendly, fast and accommodating. The upstairs dining area is cute and comfortable as well. They have an English menu upon request.

We ordered at home and it was amazing. We ordered the double cheesy and I could not recommend it more. Probably the vegan best burger I have tried in Paris.

Burgers were tasty and made from fresh products, and the staff was really helpful.

Amazing vegan burger! I had a menu with a cheeseburger, fries and iced tea and I loved it! Cute place, nice service, big enough portions.♥️

I took the first burger on the menu with the normal fries. All was pretty good, burger was slightly dry (and not as meat-tasting as sensational, impossible or beyond) but ok. Nice place for vegan junk food and staff was nice :)

A small but cosy place with a fantastic selection of vegetarian/vegan burgers and other delicious sides. The staff was kind and spoke English, which helped us a lot. Great choice if you are looking for good food for a fair price, that is a little different than the rest.

I can't believe that this is all vegan. I ordered a double cheesy and a milkshake and it was one of the best burgers i ever had.

Best vegan burger and ribs we’ve ever had! A definite must try if you’re in Paris. Excellence customer service! Super friendly guy! Thanks!

I'm not vegan or vegetarian but I enjoy good food and Burger Theory definitely has GOOD food. I tried the Double Cheesy, a bold choice as I'm not a fan of vegan cheese, and it was delicious! The fries were perfection, crispy on the outside and fluffy on the inside, YUM. The only feedback I have is the lack of cutlery (there were only single use wood forks). Also Burger Theory is not accessible for people who are handicaped as there is a steep and narrow staircase to get up to the seating area. The staff more than made up for any negatives, they were friendly, welcoming and made me laugh. They also spoke english (and had a english menu available) which made ordering a breeze!

Very tasty Vegan burgers!! The restaurant is great because there is a big variety of choice (usually hard to find Paris) and kind service. Would recommend fully

The owner was beyond friendly and spoke english. He even recommended things on the menu. I thought prices were good and my burger was delicious. The fries were also super yum and crispy.

My entire family loved this place. My 10yo and I ate the King Kong burger, spouse tried the Yakuza, and my 6yo had the Littlefoot with the vegan meat patty. Everyone loved their meals. The burgers were very flavourful and the buns - the buns - were so good! I tried the cauliflower side and it was a super tasty sub for fries. The owner/manager was very helpful understanding what to order (our French is not great - sorry! They also have an English menu). Overall just a fantastic and delicious experience. The only downside I could point to is that the vegan meat patty tasted way too much like real meat! My kids loved it but I avoid emulating meat flavours! That said, all the burger options were really creative and just awesome burgers. No need to try to replicate meat!

Burgers are great, fries were not so fresh and crunchy.

Best casual meal we had in Paris, many gluten free options (100% vegan) burgers and veggies were delicious. Hit the spot after a 20k step day exploring the surrounding neighborhoods. Highly recommend.

An insanely good vegan burger (any of them are totally awesome) and an amazing team working there. One of the few places in Paris you don’t feel like you’re immersed in some massively overpriced tourist trap. Their fries are the best me and my wife have ever eaten, a true gem and well worth a visit. We went twice in 3 days and it was worth every bit of the hours walk to get there.

The English language lacks the requisite word to describe how great and amazing this place is. It is very cozy. The guy could speak german, English and french. The food was amazing, I will definitely come by for more.

Good burgers, ok fries. I got the double cheese with loaded fries. The fries could have used some sauce (asked for ketchup & mayo but didn't get any) and they seemed a little under cooked. Overall very tasty!

Friendly staff and great vegan burgers. However, I was extremely confused that the menu shown outside the restaurant had a different order than inside, so that I, just remembering the position of the burger I wanted, in the end received a different one. I mean of course it is my own fault as I haven't remembered the name of the burger, but I think especially since the names are not that easy to remember, having the same menu inside as outside would be nice. Other than that, everything was perfect.

That was the best vegan burger I've ever had! The customer service is courteous ,and they speaks English. I had a good time :)

Game changing! For me, this has been the best vegan burger I have eaten in my life. The burger designs are clever and versatile, the fries are delicious. The burgers are not huge (but adequate for the price), so I recommend getting a menu. I will 100% visit again the next time I'm in Paris :)

Amazing burgers (and fries!) for a good price. Quick and good service, so it is ideal if you're on a time limit too. The seating area upstairs is calm and clean, so there are no complaints!

The place is very cozy, the food is tasty and vegan, I tried a king kong burger and French fries and I loved the experience.. The place was not very crowded but takeaways were kept it very busy.. The atmosphere is very warm and the service is great, very nice people and very helpful through the menu.. The upstairs (where you can sit and eat) is very nice and tidy.. And the decoration is special and unique.. And the pricing is not very expensive.. I am sure I'll visit the place again.

Not the best burger in Paris, nor the second one. Fair price, mediocre half-empty burgers, dry and sad chips. It's ok only if you are hungry and you are looking for a fast vegan meal.

This was our most disappointing lunch in Paris by a long shot. The staff was friendly, however the food was really quite bad. Bland fries, bland burgers with not much to them and the indoor seating was warm and smelly. The best thing was the vegan cheese but that was probably store bought. There are hundreds of better places to eat lunch in paris.

The food is high quality, homemade with love and 100% vegan. They even make their condiments themselves. The owners are unbelievably kind, honest, and transparent. They go through many lengths to offer produce that’s as local as possible and in season. I really recommend trying this place and supporting their small business!

Decent quick meal. Not much to say about vegan fast food. They are friendly and very helpful . And quick bite to rest your poor feet from all the walking you are doing. Burgers are decent, with maybe a little softer bun would have me it better but enjoyed this small place

As a vegetarian, I have had a good amount of veggie burgers and I found the portobello road too light and not satiating. My biggest pet peeve is that your clothes are left with the greasy scent of burgers, which means that the ventilation in the place is not working.

I didn't really feel fulfilled with the burger. I'm a vegetarian and was craving a good burger. I regularly eat Beyond Meat and Impossible Burger, so my burgers are hardy. This burger was ok. I was full afterwards. I appreciated the sauce, and grilled onions, but I was not feeling this burger, just wasn't flavorful. Great service and thanks for the English menu. WiFi password should also be available upstairs, but here is in case you need it: Theorieduburger

Exceeded my expectations! Super unique and delicious burgers that don’t rely on the Beyond Meat patty. Excellent fries too :)

A very nice vegan burger place. People are very polite. The taste of my burger was great which had a Soya steak inside but my friend took a plant based meat burger in which the steak was very badly strong in smell . Otherwise the fries here are amazing with good mix of sauce.

The burger and fries are very tasty. I would recommend the loaded fries 😍. The place is very sweet and atmospherically calm. The prices are very fair. We will come again!

The burgers were OK. The fries lacked in flavor and the lemon cake was boring. It is a quick way to grab some vegan lunch but overall I would not revisit this place nor recommend it to my hamster.

The best vegan burger! I visited this location twice and was not disappointed. They have a quaint dining room upstairs.

Nice quiet little burger restaurant with tasty vegetarian burgers. Seats on first floor with a nice view. Clean sanitary facilities.

Definitely the best vegan place I've been to in Paris. A bit more expensive than the others but totally worth it IMO.

Very good and tasty vegetarian burger, with nice menu sides. Burgers have original tastes.

Amazing vegan burger, super nice staff

WOW! Loved this place, tried a couple other vegan burger joints in Paris and this was by far our favorite. The burgers had a great beefy flavor and the bbq "ribs" were awesome! I'd come back here every time we visit Paris.

Charming little hole in the wall. Very juicy but feather light burger. Very nice surprise.