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Sintonia Jiu Jitsu

5 ★★★★★ 76 Google reviews · BJJ gym in New York, New York

BJJ gym Free trial Affiliated Beginners welcome Kids & teens Private lessons No-gi Competition team

Affiliated academy — reviews and the gym's own info point to a recognized BJJ lineage or affiliation (think Gracie Barra, 10th Planet, Renzo Gracie, Alliance, Atos or Checkmat). If lineage matters to you, ask which affiliation the academy belongs to and under whom the head instructor earned their black belt.

Plan your first class

  • Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Kids & youth classes kids and youth BJJ classes — built around discipline, focus, and confidence
  • Private lessons private, one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
  • No-gi no-gi grappling classes — training in a rashguard and shorts, with faster scrambles and a natural bridge to MMA
  • Open mat open-mat rolling sessions for members to practice live — always optional and at your own pace
  • Competition team a competition team for members who want to test themselves at tournaments
  • Today see hours ·
  • Website & schedule sintoniajiujitsu.com — book classes and see the live schedule
  • Phone (646) 398-0384

Hours

Monday 7 AM–9 PM
Tuesday 7 AM–9 PM
Wednesday 7 AM–9 PM
Thursday 7 AM–9 PM
Friday 7 AM–9 PM
Saturday 10 AM–1 PM
Sunday 11 AM–1 PM

Hours shift for holidays, seminars, and open-gym times — worth a quick check before a special trip.

The classes they run

BJJ classes on the schedule at Sintonia Jiu Jitsu, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🧒 Kids BJJ 2 mentions

“Professor Jefferson is great with children and I am noticing improvements in confidence and discipline with my 4 yr old.”

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🩳 No-Gi 2 mentions

“The class schedule covers a wide range of times as well, with a variety of gi and no-gi classes.”

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🥋 Gi 2 mentions

“The class schedule covers a wide range of times as well, with a variety of gi and no-gi classes.”

All gyms that run gi →

🏆 Competition Team 6 mentions

“Finally, being a Unity affiliate, we also have access to regular competitors and professional athletes for those with goals of competition.”

All gyms that run competition team →

🌱 Beginners 10 mentions

“Led by world champion Jeferson Guaresi, this academy offers an elite level of instruction while maintaining a welcoming and supportive atmosphere for practitioners of all levels.”

All gyms that run beginners →

Other martial arts here

BJJ gyms are usually multi-discipline. Here's what else members mention training under the same roof at Sintonia Jiu Jitsu — mined from their reviews and the gym's own info.

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want MMA, muay thai, or wrestling alongside your BJJ, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 76 Google reviews — in their own words.

🧑‍🏫 expert, high-level coaching 3 mentions

“Professor Jefferson is great with children and I am noticing improvements in confidence and discipline with my 4 yr old.”

🌱 welcoming to beginners 21 mentions

“Led by world champion Jeferson Guaresi, this academy offers an elite level of instruction while maintaining a welcoming and supportive atmosphere for practitioners of all levels.”

🤝 no-ego, friendly academy 25 mentions

“Led by world champion Jeferson Guaresi, this academy offers an elite level of instruction while maintaining a welcoming and supportive atmosphere for practitioners of all levels.”

📘 strong technique & fundamentals 4 mentions

“His teaching style is clear, patient, and detail-oriented, which makes it easy to keep learning and improving every class.”

active competition team 7 mentions

“Finally, being a Unity affiliate, we also have access to regular competitors and professional athletes for those with goals of competition.”

🧼 clean, well-kept mats 15 mentions

“The facility is clean, modern, and well-maintained from the mats to the locker rooms, everything is spotless and professional.”

From the reviews

I recently did a free trial at Sintonia Jiu Jitsu and honestly, I fell in love with it right away. From the moment I walked in, the environment felt welcoming, professional, and thoughtfully designed. The owner, Jefferson, is incredible.

★★★★★ — Benjamin, Apr 2026

I’ve always been drawn to Jiu-Jitsu, and one day I saw a poster for Sintonia that finally pushed me to step out of my comfort zone and try their free intro class with Coach Jefferson. I’ve been hooked ever since. Over three months later, Sintonia has truly become my second home.

★★★★★ — Bryant, Oct 2025

Jeferson runs an excellent school. His teaching style is clear, patient, and detail-oriented, which makes it easy to keep learning and improving every class. The gym itself is always clean and well-maintained, with a strong emphasis on safety and professionalism on the mats.

★★★★★ — Emma, Aug 2025

Omg this was my first jiu jitsu class and I really had a blast, amazing way to spend a Friday night, partying is no longer a thing, having an amazing workout to learn new skills is a new way to have fun, thanks for having me, you guys rock, I would like to add that the facility is clean and super friendly and…

★★★★★ — Marla, Mar 2026

Excerpts from public Google reviews. Read all 76 reviews →

New to BJJ? Start at Sintonia Jiu Jitsu

Sintonia Jiu Jitsu comes up as a beginner-friendly gym — noted on their own site. If you've never rolled or set foot on a mat, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit or flexible to start — you get in shape by training, not before it, and coaches scale the intensity to you. Second, you won't be thrown into hard rolling — reputable gyms build fundamentals (positions, escapes, and basic submissions) for weeks, live rolling eases in gradually, and tapping early keeps every roll safe. Third, all levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out, and leave your ego at the door. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

Check beginner classes on their site

Your first BJJ class at Sintonia Jiu Jitsu

Nervous about walking into a BJJ gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic positions and escapes with a partner — not hard sparring. Rest whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot on the mats. What to bring: water and a mouthguard if you have one — many gyms lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi (or a rashguard and shorts for no-gi) and a mouthguard. Live rolling eases in gradually, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

BJJ is a contact sport. Ease in, tap early and often, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find Sintonia Jiu Jitsu

303 E 43rd St Basement, New York, NY10017

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.