diff --git a/app/Models/Comment.php b/app/Models/Comment.php
new file mode 100644
index 0000000..e6d61f3
--- /dev/null
+++ b/app/Models/Comment.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Comment extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'post_id',
+        'user_id',
+        'parent_id',
+        'content',
+        'votes',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'votes' => 'integer',
+        ];
+    }
+
+    public function post()
+    {
+        return $this->belongsTo(Post::class);
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function parent()
+    {
+        return $this->belongsTo(Comment::class, 'parent_id');
+    }
+
+    public function replies()
+    {
+        return $this->hasMany(Comment::class, 'parent_id');
+    }
+
+    public function votes()
+    {
+        return $this->morphMany(Vote::class, 'voteable');
+    }
+
+    public function userVote($userId)
+    {
+        return $this->votes()->where('user_id', $userId)->first();
+    }
+}
diff --git a/app/Models/Community.php b/app/Models/Community.php
new file mode 100644
index 0000000..41bde63
--- /dev/null
+++ b/app/Models/Community.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
+
+class Community extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'name',
+        'slug',
+        'description',
+        'created_by',
+    ];
+
+    protected static function boot()
+    {
+        parent::boot();
+
+        static::creating(function ($community) {
+            if (empty($community->slug)) {
+                $community->slug = Str::slug($community->name);
+            }
+        });
+    }
+
+    public function creator()
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
+    public function subscribers()
+    {
+        return $this->belongsToMany(User::class)->withTimestamps();
+    }
+
+    public function posts()
+    {
+        return $this->hasMany(Post::class);
+    }
+
+    public function getRouteKeyName()
+    {
+        return 'slug';
+    }
+}
diff --git a/app/Models/Post.php b/app/Models/Post.php
new file mode 100644
index 0000000..cfe5213
--- /dev/null
+++ b/app/Models/Post.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Post extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'community_id',
+        'user_id',
+        'title',
+        'content',
+        'url',
+        'type',
+        'votes',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'votes' => 'integer',
+        ];
+    }
+
+    public function community()
+    {
+        return $this->belongsTo(Community::class);
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function comments()
+    {
+        return $this->hasMany(Comment::class);
+    }
+
+    public function votes()
+    {
+        return $this->morphMany(Vote::class, 'voteable');
+    }
+
+    public function userVote($userId)
+    {
+        return $this->votes()->where('user_id', $userId)->first();
+    }
+}
diff --git a/app/Models/User.php b/app/Models/User.php
index 749c7b7..5140b85 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -21,23 +21,14 @@ class User extends Authenticatable
         'name',
         'email',
         'password',
+        'karma',
     ];
 
-    /**
-     * The attributes that should be hidden for serialization.
-     *
-     * @var list<string>
-     */
     protected $hidden = [
         'password',
         'remember_token',
     ];
 
-    /**
-     * Get the attributes that should be cast.
-     *
-     * @return array<string, string>
-     */
     protected function casts(): array
     {
         return [
@@ -45,4 +36,29 @@ protected function casts(): array
             'password' => 'hashed',
         ];
     }
+
+    public function communities()
+    {
+        return $this->hasMany(Community::class, 'created_by');
+    }
+
+    public function subscribedCommunities()
+    {
+        return $this->belongsToMany(Community::class)->withTimestamps();
+    }
+
+    public function posts()
+    {
+        return $this->hasMany(Post::class);
+    }
+
+    public function comments()
+    {
+        return $this->hasMany(Comment::class);
+    }
+
+    public function votes()
+    {
+        return $this->hasMany(Vote::class);
+    }
 }
diff --git a/app/Models/Vote.php b/app/Models/Vote.php
new file mode 100644
index 0000000..0e90a90
--- /dev/null
+++ b/app/Models/Vote.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Vote extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'user_id',
+        'voteable_id',
+        'voteable_type',
+        'vote',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'vote' => 'integer',
+        ];
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function voteable()
+    {
+        return $this->morphTo();
+    }
+}