diff --git a/client/src/elm/MassiveDecks/Models/Decoders.elm b/client/src/elm/MassiveDecks/Models/Decoders.elm
index 9f8394da..06c99b09 100644
--- a/client/src/elm/MassiveDecks/Models/Decoders.elm
+++ b/client/src/elm/MassiveDecks/Models/Decoders.elm
@@ -47,6 +47,7 @@ import MassiveDecks.Game.Time as Time
 import MassiveDecks.Model exposing (..)
 import MassiveDecks.Models.MdError as MdError exposing (MdError)
 import MassiveDecks.Notifications.Model as Notifications
+import MassiveDecks.Pages.Lobby.Chat as Chat
 import MassiveDecks.Pages.Lobby.Configure.Decks.Model as DeckConfig
 import MassiveDecks.Pages.Lobby.Configure.Model as Configure
 import MassiveDecks.Pages.Lobby.Configure.Privacy.Model as PrivacyConfig
@@ -196,6 +197,7 @@ settings =
     Json.succeed Settings
         |> Json.required "tokens" (Json.dict lobbyToken)
         |> Json.required "openUserList" Json.bool
+        |> Json.required "openChat" Json.bool
         |> Json.optional "lastUsedName" (Json.string |> Json.map Just) Nothing
         |> Json.required "recentDecks" (Json.list externalSource)
         |> Json.optional "chosenLanguage" (language |> Json.map Just) Nothing
@@ -316,10 +318,18 @@ lobby ld calls =
         |> Json.required "users" users
         |> Json.required "owner" userId
         |> Json.required "config" config
+        |> Json.required "messages" (Json.list message)
         |> Json.optional "game" (game ld calls |> Json.map (Game.emptyModel >> Just)) Nothing
         |> Json.optional "errors" (Json.list gameStateError) []
 
 
+message : Json.Decoder Chat.Message
+message =
+    Json.succeed Chat.Message
+        |> Json.required "content" Json.string
+        |> Json.required "author" Json.string
+
+
 game : Maybe LikeDetail -> Maybe (List Card.Call) -> Json.Decoder Game
 game ld calls =
     Json.succeed Game
@@ -776,6 +786,9 @@ eventByName name =
         "GameEnded" ->
             gameEvent ended
 
+        "ReceiveChatMessage" ->
+            receiveChatMessage
+
         "ErrorEncountered" ->
             errorEncountered
 
@@ -809,6 +822,12 @@ ended =
         (Json.field "winner" (Json.list userId |> Json.map Set.fromList))
 
 
+receiveChatMessage : Json.Decoder Events.Event
+receiveChatMessage =
+    Json.map (\m -> Events.ReceiveChatMessage { message = m })
+        (Json.field "message" message)
+
+
 stageTimerDone : Json.Decoder Events.GameEvent
 stageTimerDone =
     Json.map2 (\r -> \s -> Events.StageTimerDone { round = r, stage = s })
diff --git a/client/src/elm/MassiveDecks/Models/Encoders.elm b/client/src/elm/MassiveDecks/Models/Encoders.elm
index 966a196a..90f9c964 100644
--- a/client/src/elm/MassiveDecks/Models/Encoders.elm
+++ b/client/src/elm/MassiveDecks/Models/Encoders.elm
@@ -305,6 +305,7 @@ settings s =
             List.concat
                 [ [ ( "tokens", s.tokens |> Dict.toList |> List.map (\( gc, t ) -> ( gc, Json.string t )) |> Json.object )
                   , ( "openUserList", Json.bool s.openUserList )
+                  , ( "openChat", Json.bool s.openChat )
                   , ( "recentDecks", Json.list source s.recentDecks )
                   , ( "compactCards", s.cardSize |> cardSize )
                   , ( "speech", s.speech |> speech )
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby.elm b/client/src/elm/MassiveDecks/Pages/Lobby.elm
index a2ebe319..ea96896d 100644
--- a/client/src/elm/MassiveDecks/Pages/Lobby.elm
+++ b/client/src/elm/MassiveDecks/Pages/Lobby.elm
@@ -18,6 +18,7 @@ import Html exposing (Html)
 import Html.Attributes as HtmlA
 import Html.Events as HtmlE
 import Html.Keyed as HtmlK
+import Json.Decode as Json
 import Json.Patch as Json
 import MassiveDecks.Animated as Animated exposing (Animated)
 import MassiveDecks.Card.Model as Card
@@ -38,6 +39,7 @@ import MassiveDecks.Icon as Icon
 import MassiveDecks.Model exposing (..)
 import MassiveDecks.Models.MdError as MdError
 import MassiveDecks.Pages.Lobby.Actions as Actions
+import MassiveDecks.Pages.Lobby.Chat as Chat
 import MassiveDecks.Pages.Lobby.Configure as Configure
 import MassiveDecks.Pages.Lobby.Configure.Model as Configure
 import MassiveDecks.Pages.Lobby.Events as Events
@@ -60,7 +62,6 @@ import MassiveDecks.User as User exposing (User)
 import MassiveDecks.Util.Html as Html
 import MassiveDecks.Util.Html.Attributes as HtmlA
 import MassiveDecks.Util.Maybe as Maybe
-import MassiveDecks.Util.NeList as NeList
 import Material.Button as Button
 import Material.Card as Card
 import Material.IconButton as IconButton
@@ -102,6 +103,7 @@ initWithAuth _ r auth =
       , spectate = Spectate.init
       , gameMenu = Menu.Closed
       , userMenu = Nothing
+      , chatInput = ""
       }
     , ServerConnection.connect auth.claims.gc auth.token
     )
@@ -343,6 +345,13 @@ update wrap shared msg model =
                             , Cmd.none
                             )
 
+                        Events.ReceiveChatMessage message ->
+                            let
+                                m =
+                                    lobby.messages ++ [ message.message ]
+                            in
+                            ( Stay { model | lobbyAndConfigure = model.lobbyAndConfigure |> Maybe.map (\l -> { l | lobby = { lobby | messages = m } }) }, shared, Cmd.none )
+
                 Nothing ->
                     case event of
                         Events.Sync { state, hand, play, partialTimeAnchor } ->
@@ -421,6 +430,18 @@ update wrap shared msg model =
         Copy id ->
             ( Stay model, shared, Ports.copyText id )
 
+        ChatMsg m ->
+            case m of
+                Chat.KeyDown key ->
+                    if key == 13 then
+                        ( Stay { model | chatInput = "" }, shared, Actions.sendChatMessage model.chatInput )
+
+                    else
+                        ( Stay model, shared, Cmd.none )
+
+                Chat.Input content ->
+                    ( Stay { model | chatInput = content }, shared, Cmd.none )
+
         ChangeSection s ->
             let
                 r =
@@ -522,6 +543,9 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
         usersShown =
             shared.settings.settings.openUserList
 
+        chatShown =
+            shared.settings.settings.openChat
+
         castAttrs =
             case shared.castStatus of
                 Cast.NoDevicesAvailable ->
@@ -548,6 +572,13 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
             else
                 Icon.users
 
+        chatIcon =
+            if chatShown then
+                Icon.hide
+
+            else
+                Icon.facebookMessenger
+
         lobby =
             model.lobbyAndConfigure |> Maybe.map .lobby
 
@@ -568,7 +599,7 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
     in
     [ Html.div
         [ HtmlA.id "lobby"
-        , HtmlA.classList [ ( "collapsed-users", not usersShown ) ]
+        , HtmlA.classList [ ( "collapsed-users", not usersShown ), ( "collapsed-chat", not chatShown ) ]
         , shared.settings.settings.cardSize |> cardSizeToAttr
         ]
         (Html.div [ HtmlA.id "top-bar" ]
@@ -578,6 +609,10 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
                             (usersIcon |> Icon.styled [ Icon.lg ] |> Icon.view)
                             (Strings.ToggleUserList |> Lang.string shared)
                             (usersShown |> not |> Settings.ChangeOpenUserList |> wrapSettings |> Just)
+                      , IconButton.view
+                            (chatIcon |> Icon.styled [ Icon.lg ] |> Icon.view)
+                            (Strings.ToggleChat |> Lang.string shared)
+                            (chatShown |> not |> Settings.ChangeOpenChat |> wrapSettings |> Just)
                       , lobbyMenu wrap shared model.gameMenu model.route s audienceMode localUser localPlayer (maybeGame |> Maybe.map .game)
                       ]
                     , castButton
@@ -587,7 +622,7 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
             ]
             :: HtmlK.ol [ HtmlA.class "notifications" ] notifications
             :: (model.lobbyAndConfigure
-                    |> Maybe.map2 (viewLobby wrap shared model.auth model.userMenu viewContent) model.timeAnchor
+                    |> Maybe.map2 (viewLobby wrap shared model.auth model.userMenu viewContent model) model.timeAnchor
                     |> Maybe.withDefault
                         [ Html.div [ HtmlA.class "loading" ]
                             [ Icon.loading |> Icon.styled [ Icon.fa3x ] |> Icon.view ]
@@ -603,8 +638,8 @@ viewWithUsers wrap wrapSettings shared s viewContent model =
     ]
 
 
-viewLobby : (Msg -> msg) -> Shared -> Auth -> Maybe User.Id -> ViewContent msg -> Time.Anchor -> LobbyAndConfigure -> List (Html msg)
-viewLobby wrap shared auth openUserMenu viewContent timeAnchor lobbyAndConfigure =
+viewLobby : (Msg -> msg) -> Shared -> Auth -> Maybe User.Id -> ViewContent msg -> Model -> Time.Anchor -> LobbyAndConfigure -> List (Html msg)
+viewLobby wrap shared auth openUserMenu viewContent model timeAnchor lobbyAndConfigure =
     let
         lobby =
             lobbyAndConfigure.lobby
@@ -632,6 +667,7 @@ viewLobby wrap shared auth openUserMenu viewContent timeAnchor lobbyAndConfigure
     in
     [ Html.div [ HtmlA.id "lobby-content" ]
         [ viewUsers wrap shared auth.claims.uid lobby openUserMenu game
+        , viewChat wrap lobby model
         , Html.div [ HtmlA.id "scroll-frame" ] [ viewContent configDisabledReason auth timeAnchor lobbyAndConfigure ]
         , lobby.errors |> viewErrors shared
         ]
@@ -930,7 +966,27 @@ viewUsers wrap shared localUserId lobby openUserMenu game =
         groups =
             List.concat [ activeGroups, inactiveGroup ]
     in
-    Card.view [ HtmlA.id "users" ] [ Html.div [ HtmlA.class "collapsible" ] [ HtmlK.ol [] groups ] ]
+    Card.view [ HtmlA.id "users" ]
+        [ Html.div [ HtmlA.class "collapsible" ]
+            [ HtmlK.ol [] groups ]
+        ]
+
+
+viewChat : (Msg -> msg) -> Lobby -> Model -> Html msg
+viewChat wrap lobby model =
+    let
+        users =
+            lobby.users
+
+        messages =
+            lobby.messages |> List.map (\message -> (users |> Dict.get message.author |> Maybe.map .name |> Maybe.withDefault "Unknown User") ++ ": " ++ message.content) |> List.map (Html.text >> (\t -> [ t ]) >> Html.p [ HtmlA.class "message" ])
+    in
+    Card.view [ HtmlA.id "chat" ]
+        [ Html.div [ HtmlA.class "collapsible" ]
+            [ Html.ol [] messages
+            , Html.input [ HtmlA.placeholder "Message", HtmlE.on "keydown" (Json.map (Chat.KeyDown >> ChatMsg >> wrap) HtmlE.keyCode), HtmlE.onInput (Chat.Input >> ChatMsg >> wrap), HtmlA.value model.chatInput ] []
+            ]
+        ]
 
 
 viewRoleGroup : (Msg -> msg) -> Shared -> User.Id -> User.Privilege -> Bool -> Maybe User.Id -> Maybe Game -> ( User.Role, List ( User.Id, User ) ) -> ( String, Html msg )
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby/Actions.elm b/client/src/elm/MassiveDecks/Pages/Lobby/Actions.elm
index 50972072..4bce2624 100644
--- a/client/src/elm/MassiveDecks/Pages/Lobby/Actions.elm
+++ b/client/src/elm/MassiveDecks/Pages/Lobby/Actions.elm
@@ -11,6 +11,7 @@ module MassiveDecks.Pages.Lobby.Actions exposing
     , pickCall
     , redraw
     , reveal
+    , sendChatMessage
     , setPlayerAway
     , setPresence
     , setPrivilege
@@ -142,6 +143,11 @@ enforceTimeLimit round stage =
         ]
 
 
+sendChatMessage : String -> Cmd msg
+sendChatMessage message =
+    action "SendChatMessage" [ ( "message", message |> Json.string ) ]
+
+
 
 {- Private -}
 
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby/Chat.elm b/client/src/elm/MassiveDecks/Pages/Lobby/Chat.elm
new file mode 100644
index 00000000..3279b3a3
--- /dev/null
+++ b/client/src/elm/MassiveDecks/Pages/Lobby/Chat.elm
@@ -0,0 +1,14 @@
+module MassiveDecks.Pages.Lobby.Chat exposing (..)
+
+import MassiveDecks.User as User
+
+
+type alias Message =
+    { content : String
+    , author : User.Id
+    }
+
+
+type Msg
+    = KeyDown Int
+    | Input String
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby/Events.elm b/client/src/elm/MassiveDecks/Pages/Lobby/Events.elm
index 130e26dc..2724355b 100644
--- a/client/src/elm/MassiveDecks/Pages/Lobby/Events.elm
+++ b/client/src/elm/MassiveDecks/Pages/Lobby/Events.elm
@@ -15,6 +15,7 @@ import MassiveDecks.Card.Play as Play
 import MassiveDecks.Game.Round as Round exposing (Round)
 import MassiveDecks.Game.Time as Time exposing (Time)
 import MassiveDecks.Models.MdError as MdError
+import MassiveDecks.Pages.Lobby.Chat as Chat
 import MassiveDecks.Pages.Lobby.Model exposing (Lobby)
 import MassiveDecks.User as User
 import Set exposing (Set)
@@ -38,6 +39,7 @@ type Event
     | PrivilegeChanged { user : User.Id, privilege : User.Privilege }
     | UserRoleChanged { user : User.Id, role : User.Role, hand : Maybe (List Card.Response) }
     | ErrorEncountered { error : MdError.GameStateError }
+    | ReceiveChatMessage { message : Chat.Message }
 
 
 {-| The user's intentional presence in the lobby.
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby/Messages.elm b/client/src/elm/MassiveDecks/Pages/Lobby/Messages.elm
index c9f881de..c14bfe7d 100644
--- a/client/src/elm/MassiveDecks/Pages/Lobby/Messages.elm
+++ b/client/src/elm/MassiveDecks/Pages/Lobby/Messages.elm
@@ -4,6 +4,7 @@ import MassiveDecks.Animated as Animated
 import MassiveDecks.Game.Messages as Game
 import MassiveDecks.Game.Time as Time
 import MassiveDecks.Models.MdError exposing (MdError)
+import MassiveDecks.Pages.Lobby.Chat as Chat
 import MassiveDecks.Pages.Lobby.Configure.Messages as Configure
 import MassiveDecks.Pages.Lobby.Events exposing (Event)
 import MassiveDecks.Pages.Lobby.Model exposing (..)
@@ -33,4 +34,5 @@ type Msg
     | SetGameMenuState Menu.State
     | SetUserMenuState User.Id Menu.State
     | EndGame
+    | ChatMsg Chat.Msg
     | NoOp
diff --git a/client/src/elm/MassiveDecks/Pages/Lobby/Model.elm b/client/src/elm/MassiveDecks/Pages/Lobby/Model.elm
index 53349e01..dc54a020 100644
--- a/client/src/elm/MassiveDecks/Pages/Lobby/Model.elm
+++ b/client/src/elm/MassiveDecks/Pages/Lobby/Model.elm
@@ -18,6 +18,7 @@ import MassiveDecks.Error.Model exposing (Error)
 import MassiveDecks.Game.Model as Game
 import MassiveDecks.Game.Time as Time
 import MassiveDecks.Models.MdError exposing (GameStateError, MdError)
+import MassiveDecks.Pages.Lobby.Chat as Chat
 import MassiveDecks.Pages.Lobby.Configure.Model as Configure
 import MassiveDecks.Pages.Lobby.GameCode exposing (GameCode)
 import MassiveDecks.Pages.Lobby.Route exposing (..)
@@ -49,6 +50,7 @@ type alias Model =
     , spectate : Spectate.Model
     , gameMenu : Menu.State
     , userMenu : Maybe User.Id
+    , chatInput : String
     }
 
 
@@ -64,6 +66,7 @@ type alias Lobby =
     { users : Dict User.Id User
     , owner : User.Id
     , config : Configure.Config
+    , messages : List Chat.Message
     , game : Maybe Game.Model
     , errors : List GameStateError
     }
diff --git a/client/src/elm/MassiveDecks/Settings.elm b/client/src/elm/MassiveDecks/Settings.elm
index dfafbaf3..e7aba990 100644
--- a/client/src/elm/MassiveDecks/Settings.elm
+++ b/client/src/elm/MassiveDecks/Settings.elm
@@ -75,6 +75,7 @@ defaults =
     { tokens = Dict.empty
     , lastUsedName = Nothing
     , openUserList = False
+    , openChat = False
     , recentDecks = []
     , chosenLanguage = Nothing
     , cardSize = Full
@@ -110,6 +111,9 @@ update shared msg =
         ChangeOpenUserList open ->
             changeSettings (\s -> { s | openUserList = open }) model
 
+        ChangeOpenChat open ->
+            changeSettings (\s -> { s | openChat = open }) model
+
         RemoveInvalid tokenValidity ->
             let
                 newTokens =
diff --git a/client/src/elm/MassiveDecks/Settings/Messages.elm b/client/src/elm/MassiveDecks/Settings/Messages.elm
index 80899e89..ec7d92eb 100644
--- a/client/src/elm/MassiveDecks/Settings/Messages.elm
+++ b/client/src/elm/MassiveDecks/Settings/Messages.elm
@@ -9,6 +9,7 @@ type Msg
     = ChangeLang (Maybe Language)
     | ChangeCardSize CardSize
     | ChangeOpenUserList Bool
+    | ChangeOpenChat Bool
     | ToggleOpen
     | RemoveInvalid (List Lobby.Token)
     | ToggleSpeech Bool
diff --git a/client/src/elm/MassiveDecks/Settings/Model.elm b/client/src/elm/MassiveDecks/Settings/Model.elm
index 0c50d713..dbdc42a9 100644
--- a/client/src/elm/MassiveDecks/Settings/Model.elm
+++ b/client/src/elm/MassiveDecks/Settings/Model.elm
@@ -28,6 +28,7 @@ This is really more than just user settings, it's any persistent data we store i
 type alias Settings =
     { tokens : Dict String Lobby.Token
     , openUserList : Bool
+    , openChat : Bool
     , lastUsedName : Maybe String
     , recentDecks : List Source.External
     , chosenLanguage : Maybe Language
diff --git a/client/src/elm/MassiveDecks/Strings.elm b/client/src/elm/MassiveDecks/Strings.elm
index 7d280b1d..e0bf29f8 100644
--- a/client/src/elm/MassiveDecks/Strings.elm
+++ b/client/src/elm/MassiveDecks/Strings.elm
@@ -215,6 +215,7 @@ type MdString
     | Likes { total : Int } -- A display of a number of likes.
     | LikesDescription -- A description of the number of likes a play received or a player has recieved.
     | ToggleUserList -- A description of the action of showing or hiding the user list.
+    | ToggleChat -- A description of the action of showing or hiding the chat.
     | GameMenu -- A description of the game menu.
     | UnknownUser -- A name for a user that doesn't have a known name.
     | InvitePlayers -- A short term for inviting players to the game.
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/De.elm b/client/src/elm/MassiveDecks/Strings/Languages/De.elm
index 00e3237c..dde89f1b 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/De.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/De.elm
@@ -694,6 +694,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Anzeigen oder Ausblenden der Anzeigetafel." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Spiel-Menü." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/DeXInformal.elm b/client/src/elm/MassiveDecks/Strings/Languages/DeXInformal.elm
index e5e60abc..704a7d48 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/DeXInformal.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/DeXInformal.elm
@@ -692,6 +692,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Anzeigen oder Ausblenden der Anzeigetafel." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Spiel-Menü." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/En/Internal.elm b/client/src/elm/MassiveDecks/Strings/Languages/En/Internal.elm
index 62bf8f00..b6e9753e 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/En/Internal.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/En/Internal.elm
@@ -642,6 +642,9 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Show or hide the scoreboard." ]
 
+        ToggleChat ->
+            [ Text "Show or hide the chat." ]
+
         GameMenu ->
             [ Text "Game menu." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/Es.elm b/client/src/elm/MassiveDecks/Strings/Languages/Es.elm
index b404d00a..368f07a7 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/Es.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/Es.elm
@@ -676,6 +676,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Mostrar o esconder el marcador." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Menú de la partida." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/Id.elm b/client/src/elm/MassiveDecks/Strings/Languages/Id.elm
index 9233c73b..2c840f73 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/Id.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/Id.elm
@@ -683,6 +683,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Menampilkan atau menyembunyikan papan skor." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Menu permainan." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/It.elm b/client/src/elm/MassiveDecks/Strings/Languages/It.elm
index 836acf80..4fa271ce 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/It.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/It.elm
@@ -703,6 +703,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Mostra o nascondi la classifica." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Menu del gioco." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/Ko.elm b/client/src/elm/MassiveDecks/Strings/Languages/Ko.elm
index e7461e26..0d8467b7 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/Ko.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/Ko.elm
@@ -659,6 +659,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "스코어보드를 보이거나 숨깁니다." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "게임 메뉴." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/Pl.elm b/client/src/elm/MassiveDecks/Strings/Languages/Pl.elm
index db4c9dd9..e2890786 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/Pl.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/Pl.elm
@@ -770,6 +770,10 @@ translate maybeDeclCase mdString =
         ToggleUserList ->
             [ Text "Ukryj lub pokaż listę graczy." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Menu gry." ]
 
diff --git a/client/src/elm/MassiveDecks/Strings/Languages/PtBR.elm b/client/src/elm/MassiveDecks/Strings/Languages/PtBR.elm
index de79ffa3..cf34d651 100644
--- a/client/src/elm/MassiveDecks/Strings/Languages/PtBR.elm
+++ b/client/src/elm/MassiveDecks/Strings/Languages/PtBR.elm
@@ -690,6 +690,10 @@ translate _ mdString =
         ToggleUserList ->
             [ Text "Mostrar ou ocultar a lista de pontuação." ]
 
+        -- TODO: Translate
+        ToggleChat ->
+            [ Missing ]
+
         GameMenu ->
             [ Text "Menu do jogo." ]
 
diff --git a/client/src/scss/pages/_lobby.scss b/client/src/scss/pages/_lobby.scss
index bfdb093e..dacefc0b 100644
--- a/client/src/scss/pages/_lobby.scss
+++ b/client/src/scss/pages/_lobby.scss
@@ -6,7 +6,7 @@
 @use "../cards/_colors" as card-colors;
 
 $top-bar-height: 4rem;
-$users-width: 18rem;
+$side-bar-width: 18rem;
 
 @keyframes fadeIn {
   from {
@@ -54,14 +54,14 @@ $users-width: 18rem;
 #scroll-frame {
   position: absolute;
   top: 0;
-  left: $users-width;
+  left: $side-bar-width;
   right: 0;
   bottom: 0;
   overflow: auto;
   transition: left 0.3s;
 }
 
-.collapsed-users #scroll-frame {
+.collapsed-users.collapsed-chat #scroll-frame {
   left: 0;
 }
 
@@ -92,11 +92,11 @@ $users-width: 18rem;
   left: 0;
   top: 0;
   bottom: 0;
-  width: $users-width;
+  width: $side-bar-width;
 
   transition: width 0.3s;
 
-  --mdc-menu-max-width: #{calc($users-width - 2em)};
+  --mdc-menu-max-width: #{calc($side-bar-width - 2em)};
 
   mwc-menu {
     left: 0;
@@ -173,12 +173,12 @@ $users-width: 18rem;
   }
 }
 
-@media screen and (max-width: $users-width * 2) {
+@media screen and (max-width: $side-bar-width * 2) {
   #scroll-frame {
     left: 100vw;
   }
 
-  #users {
+  #side-bar {
     width: 100vw;
   }
 }
@@ -187,6 +187,57 @@ $users-width: 18rem;
   width: 0;
 }
 
+.collapsed-chat #chat {
+  width: 0;
+}
+
+#chat {
+  font-size: 1rem;
+  overflow-y: auto;
+
+  z-index: 2;
+
+  border-radius: 0;
+
+  padding: 0;
+
+  min-height: 100%;
+
+  position: absolute;
+  left: 0;
+  top: 0;
+  bottom: 0;
+  width: $side-bar-width;
+
+  transition: width 0.3s;
+
+  .collapsible {
+    padding: 1em;
+  }
+
+  ol {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+  }
+
+  li {
+    margin-top: 0.5em;
+  }
+
+  display: flex;
+  flex-direction: column-reverse;
+
+  .message {
+    margin: 0.5em;
+  }
+
+  input {
+    position: absolute;
+    bottom: 0;
+  }
+}
+
 .cast-button {
   &.connecting {
     animation: fadeIn 1s infinite alternate;
diff --git a/server/src/ts/action.ts b/server/src/ts/action.ts
index 8718efed..7082c3b3 100644
--- a/server/src/ts/action.ts
+++ b/server/src/ts/action.ts
@@ -4,6 +4,7 @@ import * as GameAction from "./action/game-action.js";
 import type * as Handler from "./action/handler.js";
 import * as Leave from "./action/leave.js";
 import * as Privileged from "./action/privileged.js";
+import * as SendChatMessage from "./action/send-chat-message.js";
 import * as SetUserRole from "./action/set-user-role.js";
 import * as Validation from "./action/validation.validator.js";
 import { AlreadyAuthenticatedError } from "./errors/authentication.js";
@@ -18,12 +19,14 @@ export type Action =
   | GameAction.GameAction
   | Privileged.Privileged
   | SetUserRole.SetUserRole
+  | SendChatMessage.SendChatMessage
   | Leave.Leave;
 
 const allActions = new Actions.PassThroughGroup(
   GameAction.actions,
   Privileged.actions,
   SetUserRole.actions,
+  SendChatMessage.actions,
   Leave.actions,
 );
 
diff --git a/server/src/ts/action/send-chat-message.ts b/server/src/ts/action/send-chat-message.ts
new file mode 100644
index 00000000..801fd07c
--- /dev/null
+++ b/server/src/ts/action/send-chat-message.ts
@@ -0,0 +1,45 @@
+import type { Action } from "../action.js";
+import type * as Lobby from "../lobby.js";
+import type * as Handler from "./handler.js";
+import * as Actions from "./actions.js";
+import * as Event from "../event.js";
+import * as ReceiveChatMessage from "../events/lobby-event/receive-chat-message.js";
+
+/**
+ * A player sends a message in the chat.
+ */
+export interface SendChatMessage {
+  action: "SendChatMessage";
+  message: string;
+}
+
+class SendChatMessageActions extends Actions.Implementation<
+  Action,
+  SendChatMessage,
+  "SendChatMessage",
+  Lobby.Lobby
+> {
+  protected readonly name = "SendChatMessage";
+
+  protected handle: Handler.Custom<SendChatMessage, Lobby.Lobby> = (
+    auth,
+    lobby,
+    action,
+  ) => {
+    lobby.messages.push({
+      content: action.message,
+      author: auth.uid,
+    });
+    const allEvents = [
+      Event.targetAll(
+        ReceiveChatMessage.of({ content: action.message, author: auth.uid }),
+      ),
+    ];
+    return {
+      lobby,
+      events: allEvents,
+    };
+  };
+}
+
+export const actions = new SendChatMessageActions();
diff --git a/server/src/ts/action/validation.validator.ts b/server/src/ts/action/validation.validator.ts
index 2704b965..61557bbc 100644
--- a/server/src/ts/action/validation.validator.ts
+++ b/server/src/ts/action/validation.validator.ts
@@ -80,6 +80,9 @@ export const Schema = {
         {
           $ref: "#/definitions/SetUserRole",
         },
+        {
+          $ref: "#/definitions/SendChatMessage",
+        },
         {
           $ref: "#/definitions/Leave",
         },
@@ -759,7 +762,6 @@ export const Schema = {
           description: "The name the user wishes to use.",
           maxLength: 100,
           minLength: 1,
-          type: "string",
         },
         password: {
           description:
@@ -821,6 +823,21 @@ export const Schema = {
       enum: ["Player", "Spectator"],
       type: "string",
     },
+    SendChatMessage: {
+      additionalProperties: false,
+      description: "A player sends a message in the chat.",
+      properties: {
+        action: {
+          enum: ["SendChatMessage"],
+          type: "string",
+        },
+        message: {
+          type: "string",
+        },
+      },
+      required: ["action", "message"],
+      type: "object",
+    },
     SetPlayerAway: {
       additionalProperties: false,
       description: "A privileged user asks to set a given player as away.",
diff --git a/server/src/ts/events/lobby-event.ts b/server/src/ts/events/lobby-event.ts
index 244546f9..5a0da1c1 100644
--- a/server/src/ts/events/lobby-event.ts
+++ b/server/src/ts/events/lobby-event.ts
@@ -4,6 +4,7 @@ import type { ErrorEncountered } from "./lobby-event/error-encountered.js";
 import type { PresenceChanged } from "./lobby-event/presence-changed.js";
 import type { PrivilegeChanged } from "./lobby-event/privilege-changed.js";
 import type { UserRoleChanged } from "./lobby-event/user-role-changed.js";
+import type { ReceiveChatMessage } from "./lobby-event/receive-chat-message.js";
 
 export type LobbyEvent =
   | Configured
@@ -11,4 +12,5 @@ export type LobbyEvent =
   | PresenceChanged
   | PrivilegeChanged
   | UserRoleChanged
-  | ErrorEncountered;
+  | ErrorEncountered
+  | ReceiveChatMessage;
diff --git a/server/src/ts/events/lobby-event/receive-chat-message.ts b/server/src/ts/events/lobby-event/receive-chat-message.ts
new file mode 100644
index 00000000..32f4d685
--- /dev/null
+++ b/server/src/ts/events/lobby-event/receive-chat-message.ts
@@ -0,0 +1,14 @@
+import type * as Chat from "../../lobby/chat.js";
+
+/**
+ * Indicates a new message has been sent to the lobby.
+ */
+export interface ReceiveChatMessage {
+  event: "ReceiveChatMessage";
+  message: Chat.Message;
+}
+
+export const of = (message: Chat.Message): ReceiveChatMessage => ({
+  event: "ReceiveChatMessage",
+  message,
+});
diff --git a/server/src/ts/lobby.ts b/server/src/ts/lobby.ts
index 33b22f77..e3dc8770 100644
--- a/server/src/ts/lobby.ts
+++ b/server/src/ts/lobby.ts
@@ -1,5 +1,6 @@
 import type { CreateLobby } from "./action/initial/create-lobby.js";
 import type { RegisterUser } from "./action/initial/register-user.js";
+import type * as Chat from "./lobby/chat.js";
 import type * as Errors from "./errors.js";
 import * as Event from "./event.js";
 import * as PresenceChanged from "./events/lobby-event/presence-changed.js";
@@ -20,6 +21,7 @@ export interface Lobby {
   users: { [id: string]: User.User };
   owner: User.Id;
   config: Config.Config;
+  messages: Chat.Message[];
   game?: Game.Game;
   errors: Errors.Details[];
 }
@@ -50,6 +52,7 @@ export interface Public {
   users: { [id: string]: User.Public };
   owner: User.Id;
   config: Config.Public;
+  messages: Chat.Message[];
   game?: Game.Public;
   errors?: Errors.Details[];
 }
@@ -121,6 +124,7 @@ export function create(
     users: { [ownerId]: User.create(creation.owner, "Player", "Privileged") },
     owner: ownerId,
     config: config,
+    messages: [],
     errors: [],
   };
   config.rules.houseRules.rando = Rando.create(
@@ -167,6 +171,7 @@ export const censor = (lobby: Lobby): Public => ({
   users: usersObj(lobby),
   owner: lobby.owner,
   config: Config.censor(lobby.config),
+  messages: lobby.messages,
   ...(lobby.game === undefined ? {} : { game: lobby.game.public() }),
   ...(lobby.errors.length === 0 ? {} : { errors: lobby.errors }),
 });
diff --git a/server/src/ts/lobby/chat.ts b/server/src/ts/lobby/chat.ts
new file mode 100644
index 00000000..18e25d5a
--- /dev/null
+++ b/server/src/ts/lobby/chat.ts
@@ -0,0 +1,4 @@
+export interface Message {
+  content: string;
+  author: string;
+}