diff --git a/app/Http/Controllers/ConversationController.php b/app/Http/Controllers/ConversationController.php
new file mode 100644
index 0000000..fb46ec9
--- /dev/null
+++ b/app/Http/Controllers/ConversationController.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Conversation;
+use Illuminate\Http\Request;
+
+class ConversationController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        //
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        //
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        //
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Conversation $conversation)
+    {
+        //
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(Conversation $conversation)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Conversation $conversation)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Conversation $conversation)
+    {
+        //
+    }
+}
diff --git a/app/Http/Controllers/MessageController.php b/app/Http/Controllers/MessageController.php
new file mode 100644
index 0000000..7b7b6b1
--- /dev/null
+++ b/app/Http/Controllers/MessageController.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Message;
+use Illuminate\Http\Request;
+
+class MessageController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        //
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        //
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        //
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Message $message)
+    {
+        //
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(Message $message)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Message $message)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Message $message)
+    {
+        //
+    }
+}
diff --git a/app/Http/Controllers/ParticipantController.php b/app/Http/Controllers/ParticipantController.php
new file mode 100644
index 0000000..62919a6
--- /dev/null
+++ b/app/Http/Controllers/ParticipantController.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Participant;
+use Illuminate\Http\Request;
+
+class ParticipantController extends Controller
+{
+    /**
+     * Display a listing of the resource.
+     */
+    public function index()
+    {
+        //
+    }
+
+    /**
+     * Show the form for creating a new resource.
+     */
+    public function create()
+    {
+        //
+    }
+
+    /**
+     * Store a newly created resource in storage.
+     */
+    public function store(Request $request)
+    {
+        //
+    }
+
+    /**
+     * Display the specified resource.
+     */
+    public function show(Participant $participant)
+    {
+        //
+    }
+
+    /**
+     * Show the form for editing the specified resource.
+     */
+    public function edit(Participant $participant)
+    {
+        //
+    }
+
+    /**
+     * Update the specified resource in storage.
+     */
+    public function update(Request $request, Participant $participant)
+    {
+        //
+    }
+
+    /**
+     * Remove the specified resource from storage.
+     */
+    public function destroy(Participant $participant)
+    {
+        //
+    }
+}
diff --git a/app/Models/Conversation.php b/app/Models/Conversation.php
new file mode 100644
index 0000000..3c7c390
--- /dev/null
+++ b/app/Models/Conversation.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Concerns\HasUlids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Conversation extends Model
+{
+    use HasFactory, HasUlids, SoftDeletes;
+
+    protected $fillable = [
+        'label',
+        'is_group',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'is_group' => 'boolean',
+        ];
+    }
+
+    public function participants(): HasMany
+    {
+        return $this->hasMany(Participant::class);
+    }
+
+    public function messages(): HasMany
+    {
+        return $this->hasMany(Message::class);
+    }
+
+    public function users(): BelongsToMany
+    {
+        return $this->belongsToMany(User::class, 'participants')
+            ->withTimestamps()
+            ->using(Participant::class); // Optional, but links the pivot back to Participant model if needed.
+    }
+}
diff --git a/app/Models/Message.php b/app/Models/Message.php
new file mode 100644
index 0000000..c7f4d2e
--- /dev/null
+++ b/app/Models/Message.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Concerns\HasUlids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Message extends Model
+{
+    use HasFactory, HasUlids, SoftDeletes;
+
+    protected $fillable = [
+        'user_id',
+        'sender_name',
+        'sender_avatar_url',
+        'conversation_id',
+        'body',
+        'read_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'read_at' => 'datetime',
+        ];
+    }
+
+    public function conversation(): BelongsTo
+    {
+        return $this->belongsTo(Conversation::class);
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}
diff --git a/app/Models/Participant.php b/app/Models/Participant.php
new file mode 100644
index 0000000..a267400
--- /dev/null
+++ b/app/Models/Participant.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Concerns\HasUlids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\Pivot;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Participant extends Pivot
+{
+    use HasFactory, HasUlids;
+
+    protected $table = 'participants';
+
+    public $incrementing = false;
+
+    protected $fillable = [
+        'conversation_id',
+        'user_id',
+    ];
+
+    public function conversation(): BelongsTo
+    {
+        return $this->belongsTo(Conversation::class);
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}
diff --git a/database/migrations/2026_04_10_101124_create_conversations_table.php b/database/migrations/2026_04_10_101124_create_conversations_table.php
new file mode 100644
index 0000000..c5a9d15
--- /dev/null
+++ b/database/migrations/2026_04_10_101124_create_conversations_table.php
@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('conversations', function (Blueprint $table) {
+            $table->ulid('id')->primary();
+            $table->string('label')->nullable();
+            $table->boolean('is_group')->default(false);
+            $table->softDeletesTz();
+            $table->timestampsTz();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('conversations');
+    }
+};
diff --git a/database/migrations/2026_04_10_101315_create_messages_table.php b/database/migrations/2026_04_10_101315_create_messages_table.php
new file mode 100644
index 0000000..ad3eb06
--- /dev/null
+++ b/database/migrations/2026_04_10_101315_create_messages_table.php
@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('messages', function (Blueprint $table) {
+            $table->ulid('id')->primary();
+            $table->foreignUlid('user_id')->constrained('users')->nullOnDelete();
+            $table->string('sender_name');
+            $table->string('sender_avatar_url')->nullable();
+            $table->foreignUlid('conversation_id')->constrained('conversations')->cascadeOnDelete();
+            $table->text('body')->nullable();
+            $table->timestampTz('read_at')->nullable();
+            $table->softDeletesTz();
+            $table->timestampsTz();
+
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('messages');
+    }
+};
diff --git a/database/migrations/2026_04_10_101621_create_participants_table.php b/database/migrations/2026_04_10_101621_create_participants_table.php
new file mode 100644
index 0000000..bf06464
--- /dev/null
+++ b/database/migrations/2026_04_10_101621_create_participants_table.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('participants', function (Blueprint $table) {
+            $table->ulid('id')->primary();
+            $table->foreignUlid('conversation_id')->constrained('conversations')->cascadeOnDelete();
+            $table->foreignUlid('user_id')->constrained('users')->cascadeOnDelete();
+            $table->timestampsTz();
+
+            $table->unique(['conversation_id', 'user_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('participants');
+    }
+};