Buzzer · Live quizFamily game night10+ games live, zero setup
10+ free games. One link. Everyone plays live.
Sudoku, word search, crosswords, chess, checkers, ludo, a live quiz show and bingo, right in your browser. Pick a game, share one code, and every move shows up live. Plus competitions with a big-screen show and live games for corporate events.
- No download
- Guests welcome
- English and French
- Free to play
Buzzer · Live quizFamily game night
Today's puzzles
Play today's dailies
One shared puzzle a day per game, the same for everyone. Beat your friends' time.
The lineup
Pick your game
Grouped by mood: puzzles and words, board classics, party, and corporate games for rooms. Every one runs live in your browser.
Puzzles and words
SudoKru
Multiplayer sudoku
Race the grid solo or on the daily, solve one live board as a Kru of 2 to 4, or climb the ELO ladder in rated Battles. Learn at Kru Academy, build grids in the Studio.
Solo + dailyKru co-op 2 to 4Rated Battle1–4 playersSonarKru
Multiplayer word search
Trace hidden words across four dive sizes, race the daily in English or French, share one live hunt with a crew, or claim words before your rivals in a rated Battle.
Solo + dailyCo-op 2 to 4Rated Battle1–4 playersCrossKru
Multiplayer crossword
Clued crosswords in four sizes: solve solo, take the daily in English or French, fill one grid with your crew, or race a rival cell for cell.
Solo + dailyCo-op 2 to 4Rated board race1–4 players
Board classics
Checkers
Checkers (draughts)
Jump, chain and crown on a glass tabletop: solo against three bot levels, pass and play on one device, rated duels, co-op 2v2 and today's board. Classic or Flying kings.
3 bot levelsRated + co-op 2v2Daily board1–4 playersChess
Chess
Open, castle and mate on a marble-glass tabletop: solo up to Grandmaster level, pass and play, rated duels, co-op 2v2 and today's position. Rules that teach themselves.
3 bot levelsRated + co-op 2v2Replay1–4 players
Party
Buzzer
Live quiz show
A live quiz show: host from your phone, players join with a code, the stage view fills the big screen and spectators follow every reveal. No account to play.
Host from your phoneStage on the TVSpectators2–20 playersNew Bingo
Live bingo night
One big screen, a real ball blower, everyone's phone as their card. Plouf calls every number.
Host from a phone75 or 90 ballsEN and FR2–50 players
Corporate games
NewFor conferences, team days and workshops: the room joins by code, the big screen shows the room to itself.
Word Cloud
Live word cloud
Ask one question and the room answers on their phones in a word or two. The cloud grows on the big screen, biggest words first. Ask again at the close to see what moved.
Typed or pickedWord listsThen and now2 to 500 people
Live Poll
Live polls for the room
Flash questions with results that build live: bars, ballot jars, the room line for a scale and a tug of war for this or that. Mark a right answer for a quick quiz.
Bars, jars, tug of warRight answersThen and now2 to 500 people
Idea Rush
The team board game
Tables race their ideas across a playful board: pitch, pick, plan. Ten minutes later every top idea has an owner and a date, and the organizer has the plan.
Teams raceAction plan exportRoom’s pick4 to 96 people
Live Q&A
The room’s questions, curated by you
Questions arrive from every phone and the best ones climb on votes. You put one on air at a time, and repeated questions merge with every vote kept.
Ask and voteYou choose what airsDuplicates merged2 to 500 people
Live sessionAll four in one session, one code for the day
Phones follow you from the opening cloud to the closing one. The report lands in your inbox.
Plan a session
More games are on the way.
Ways to play
Solo, together, or against the world
Every game runs live. Pick the mood, the games follow.
Solo vs bots
Three levels, from Gentle to Ruthless (Grandmaster in Chess).
In Ludo, Checkers, Chess
Co-op crews of 2 to 4
One live board, every move shared the instant it lands.
In SudoKru, SonarKru, CrossKru, Checkers, Chess
Rated play with ELO
Duels and Battles that move your rating, plus challenges and leaderboards.
In SudoKru, SonarKru, CrossKru, Checkers, Chess
Pass and play
Two players, one device, turn by turn.
In Checkers, Chess
Host a live show
A quiz or a bingo night from your phone, the stage on the TV, spectators by code.
In Buzzer, Bingo
Dailies
One shared puzzle a day, per game, the same for everyone.
In SudoKru, SonarKru, CrossKru, Ludo, Checkers, Chess
Host a quiz night
Host from your phone. The TV is the stage.
Buzzer runs a live quiz show for your crew: you host from your phone or laptop, players join with a code, the stage view fills the big screen and spectators follow every reveal.
- Quick Host: 5 players, no account needed
- Free account: 20 players, 50 spectators, saved quizzes and Board mode
- Players and spectators never need an account
Watch a live show
Been sent a show code? Watch a Buzzer show live from any browser, reveals included.
New · Competitions
Run a competition tonight
Pick a game, pick a format, share a code. Your friends, class or team play on their phones while the big screen does the show: live ranking, the who's-through reveal, the podium.
Free with an account · up to 64 players · nobody needs an app
SudoKrurace
SonarKrurace
CrossKrurace
Chessduel
Checkersduel
The who's-through reveal
The live board
The champion
Live right now
Counting the rooms…
Most are private: classrooms, offices, families. You can't join them, but you can start your own in two minutes.
Learn and create
Learn with Kru, build your own grids
SudoKru goes further than the grid: an academy that teaches you to solve, and a studio that lets you build.
Kru Academy
Kru teaches sudoku himself: watch each technique move by move, drill it on real grids, then pass a belt exam. Five belts, from Rock Pool to Abyss.
Start your first lesson
Community Grids
Build a grid in the Grid Studio, publish it, like the best ones, and play any community grid solo, as a Kru or in a Battle.
Browse community gridsJoin the crew
Why make a free account
Everything plays as a guest. An account adds the parts that follow you across all eight games.
- Rated games and your ELO
- Challenges and leaderboards
- Your face on every board, with the Face Builder
- Your stats across all eight games
Early players get founder perks: a Founding Player badge and first access to every new game.
Sign up free
Takes a minute: we email you a code to verify your address.
Got a code?
Join with a code
A friend sent you a room or show code? Pick the game and paste it in there.
Good questions
The stuff everyone asks before their first game night.
Yes. Every game and every feature is free while we're in early access, no card, no ads, and hosting competitions and corporate games is free too. Organization accounts and custom events are quoted separately. Paid plans come later, and we'll say so well in advance.
No. Every game lets friends join as guests with a code or a link. A free account adds rated games, challenges, leaderboards, your face on the boards and your stats.
A browser. Phone, tablet, laptop, anything modern works. Nothing to download or install.
Solo, or 2 to 4 on one live board in SudoKru, SonarKru, CrossKru, Ludo, Checkers and Chess. Buzzer hosts a quiz for up to 20 players and 50 spectators with a free account (5 and 5 with Quick Host). Bingo hosts 50 players and 100 watchers, competitions up to 64 players, and the corporate games up to 64 people with a free account (500 with an organization).
Yes. Every game, every page and the daily puzzles exist in English and French. SonarKru and CrossKru even let you pick the word language separately from the interface.
We keep it minimal: an email and a display name for an account. Guests need nothing to play; in Bingo, competitions and live sessions they type a name so the room knows who is who. No ads, no selling data. The details are in our privacy policy.
Yes, and hosting is free. Run a competition with a big-screen show in SudoKru, SonarKru, CrossKru, Chess or Checkers, a Buzzer quiz or a Bingo night from your phone, or Word Cloud, Live Poll, Idea Rush and Live Q&A for a conference or a team day. Guests join by code. For bigger events, talk to us.