diff --git a/Lieb/Data/Constants.cs b/Lieb/Data/Constants.cs
index f1e6df1..fc58894 100644
--- a/Lieb/Data/Constants.cs
+++ b/Lieb/Data/Constants.cs
@@ -8,6 +8,12 @@
         public static readonly int RaidEditPowerLevel = Roles.Moderator.PowerLevel;
         public const int REMOVE_MAYBE_MINUTES = 15;
 
+        public static class Polls
+        {
+            public const string YES = "yes";
+            public const string NO = "no";
+        }
+
         public static class Roles
         {
             public static readonly RoleConstant User = new RoleConstant("user", 20);
diff --git a/Lieb/Data/DiscordService.cs b/Lieb/Data/DiscordService.cs
index 96201fe..80110c0 100644
--- a/Lieb/Data/DiscordService.cs
+++ b/Lieb/Data/DiscordService.cs
@@ -306,8 +306,15 @@ namespace Lieb.Data
 
         public static ApiRaid ConvertRaid(Raid raid)
         {
+            string title = raid.Title;
+            if (raid.SignUps.Count < raid.MinUsers
+                && raid.MinUserDeadLineUTC.UtcDateTime > DateTimeOffset.UtcNow)
+            {
+                title = $"The raid was canceled because of not enough sign ups.\n\n{raid.Title}";
+            }
+
             ApiRaid apiRaid = new ApiRaid(){
-                Title = raid.Title,
+                Title = title,
                 Description = raid.Description,
                 Guild = raid.Guild,
                 Organizer = raid.Organizer,
diff --git a/Lieb/Data/LiebContext.cs b/Lieb/Data/LiebContext.cs
index 1d0a1ce..fc11641 100644
--- a/Lieb/Data/LiebContext.cs
+++ b/Lieb/Data/LiebContext.cs
@@ -2,6 +2,7 @@
 using Lieb.Models;
 using Lieb.Models.GuildWars2;
 using Lieb.Models.GuildWars2.Raid;
+using Lieb.Models.Poll;
 using Microsoft.EntityFrameworkCore;
 
 namespace Lieb.Data
@@ -26,6 +27,9 @@ namespace Lieb.Data
         public DbSet<RaidSignUp> RaidSignUps { get; set; }
         public DbSet<DiscordRaidMessage> DiscordRaidMessages { get; set; }
         public DbSet<DiscordSettings> DiscordSettings { get; set; }
+        public DbSet<Poll> Polls { get; set; }
+        public DbSet<PollOption> PollOptions { get; set; }
+        public DbSet<PollAnswer> PollAnswers { get; set; }
 
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
@@ -43,6 +47,9 @@ namespace Lieb.Data
             modelBuilder.Entity<RaidSignUp>().ToTable("RaidSignUp");
             modelBuilder.Entity<DiscordRaidMessage>().ToTable("DiscordRaidMessage");
             modelBuilder.Entity<DiscordSettings>().ToTable("DiscordSettings");
+            modelBuilder.Entity<Poll>().ToTable("Poll");
+            modelBuilder.Entity<PollOption>().ToTable("PollOption");
+            modelBuilder.Entity<PollAnswer>().ToTable("PollAnswer");
         }
     }
 }
diff --git a/Lieb/Data/PollService.cs b/Lieb/Data/PollService.cs
new file mode 100644
index 0000000..d8864be
--- /dev/null
+++ b/Lieb/Data/PollService.cs
@@ -0,0 +1,113 @@
+using Lieb.Models.GuildWars2.Raid;
+using Lieb.Models.Poll;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Internal;
+
+namespace Lieb.Data
+{
+    public class PollService
+    {
+        private readonly IDbContextFactory<LiebContext> _contextFactory;
+        private readonly DiscordService _discordService;
+        public PollService(IDbContextFactory<LiebContext> contextFactory, DiscordService discordService)
+        {
+            _contextFactory = contextFactory;
+            _discordService = discordService;
+        }
+
+        public Poll GetPoll(int pollId)
+        {
+            using var context = _contextFactory.CreateDbContext();
+            Poll? poll = context.Polls
+                            .Include(p => p.Options)
+                            .Include(p => p.Answers)
+                            .FirstOrDefault(p => p.PollId == pollId);
+
+            if (poll != null) return poll;
+
+            return new Poll();
+        }
+
+        public List<Poll> GetPollsByRaidId(int raidId)
+        {
+            using var context = _contextFactory.CreateDbContext();
+            return context.Polls
+                            .Include(p => p.Options)
+                            .Include(p => p.Answers)
+                            .Where(p => p.RaidId == raidId).ToList();
+        }
+
+        public async Task<int> CreatePoll(string question, List<string> options, int raidId)
+        {
+            using var context = _contextFactory.CreateDbContext();
+            Raid? raid = context.Raids
+                            .Include(r => r.SignUps)
+                            .FirstOrDefault(r => r.RaidId == raidId);
+
+            if (raid == null) return 0;
+            List<ulong> users = raid.SignUps.Where(s => s.LiebUserId != null).Select(s => (ulong)s.LiebUserId).ToList();
+            return await CreatePoll(question, options, users, raidId);
+        }
+
+        public async Task<int> CreatePoll(string question, List<string> options, List<ulong> users, int? raidId = null)
+        {
+            Poll poll = new Poll()
+            {
+                Question = question,
+                RaidId = raidId
+            };
+            foreach(string option in options)
+            {
+                poll.Options.Add(new PollOption()
+                {
+                    Name = option
+                });
+            }
+            foreach(ulong user in users)
+            {
+                poll.Answers.Add(new PollAnswer()
+                {
+                    UserId = user
+                });
+            }
+
+            using var context = _contextFactory.CreateDbContext();
+            context.Polls.Add(poll);
+            await context.SaveChangesAsync();
+            return poll.PollId;
+        }
+
+        public async Task DeletePoll(int pollId)
+        {
+            using var context = _contextFactory.CreateDbContext();
+            Poll? poll = context.Polls
+                            .Include(p => p.Options)
+                            .Include(p => p.Answers)
+                            .FirstOrDefault(p => p.PollId == pollId);
+
+            if(poll == null) return; 
+
+            context.PollOptions.RemoveRange(poll.Options);
+            context.PollAnswers.RemoveRange(poll.Answers);
+            await context.SaveChangesAsync();
+
+            poll.Options.Clear();
+            poll.Answers.Clear();
+            context.Polls.Remove(poll);
+            await context.SaveChangesAsync();
+        }
+
+        public async Task UpdateAnswer(int pollId, int pollOptionId, ulong userId)
+        {
+            using var context = _contextFactory.CreateDbContext();
+            Poll? poll = context.Polls
+                            .Include(p => p.Answers)
+                            .FirstOrDefault(p => p.PollId == pollId && p.Answers.Where(a => a.UserId == userId).Any());
+
+            if (poll == null) return;
+
+            PollAnswer answer = poll.Answers.First(a => a.UserId == userId);
+            answer.PollOptionId = pollOptionId;
+        }
+    }
+}
diff --git a/Lieb/Data/RaidService.cs b/Lieb/Data/RaidService.cs
index 678cabb..eff9c8b 100644
--- a/Lieb/Data/RaidService.cs
+++ b/Lieb/Data/RaidService.cs
@@ -1,6 +1,7 @@
 using Lieb.Models;
 using Lieb.Models.GuildWars2;
 using Lieb.Models.GuildWars2.Raid;
+using Lieb.Models.Poll;
 using Microsoft.EntityFrameworkCore;
 
 namespace Lieb.Data
@@ -9,11 +10,13 @@ namespace Lieb.Data
     {
         private readonly IDbContextFactory<LiebContext> _contextFactory;
         private readonly DiscordService _discordService;
+        private readonly PollService _pollService;
 
-        public RaidService(IDbContextFactory<LiebContext> contextFactory, DiscordService discordService)
+        public RaidService(IDbContextFactory<LiebContext> contextFactory, DiscordService discordService, PollService pollService)
         {
             _contextFactory = contextFactory;
             _discordService = discordService;
+            _pollService = pollService;
         }
 
         public List<Raid> GetRaids()
@@ -444,6 +447,7 @@ namespace Lieb.Data
             errorMessage = string.Empty;
             using var context = _contextFactory.CreateDbContext();
             Raid? raid = context.Raids
+                .Include(r => r.SignUps)
                 .AsNoTracking()
                 .FirstOrDefault(r => r.RaidId == raidId);
             if(raid == null)
@@ -451,6 +455,14 @@ namespace Lieb.Data
                 errorMessage = "Raid not found.";
                 return false;
             }
+
+            if (raid.SignUps.Count < raid.MinUsers
+                && raid.MinUserDeadLineUTC.UtcDateTime > DateTimeOffset.UtcNow)
+            {
+                errorMessage = $"The raid was canceled because of not enough sign ups.";
+                return false;
+            }
+
             LiebUser? user = context.LiebUsers
                 .Include(u => u.RoleAssignments)
                 .ThenInclude(a => a.LiebRole)
@@ -670,5 +682,49 @@ namespace Lieb.Data
                 await context.SaveChangesAsync();
             }
         }
+
+        public async Task CheckMinUsers()
+        {
+            using var context = _contextFactory.CreateDbContext();
+            List<Raid> raids = context.Raids
+                                .Include(r => r.SignUps)
+                                .Where(r => r.SignUps.Count < r.MinUsers && r.MinUserPollId == null).ToList();
+            foreach (Raid raid in raids.Where(r => r.MinUserDeadLineUTC < DateTimeOffset.UtcNow && r.StartTimeUTC > DateTimeOffset.UtcNow))
+            {
+                raid.MinUserPollId = await _pollService.CreatePoll(
+                                        "The raid has not the required users, do you want to raid anyway?", 
+                                        new List<string>() {Constants.Polls.YES, Constants.Polls.NO }, raid.RaidId);
+                await context.SaveChangesAsync();
+                await _discordService.PostRaidMessage(raid.RaidId);
+            }
+        }
+
+        public async Task CheckMinUserPollResult()
+        {
+            using var context = _contextFactory.CreateDbContext();
+            List<Raid> raids = context.Raids
+                                .Include(r => r.SignUps)
+                                .Where(r => r.SignUps.Count < r.MinUsers && r.MinUserPollId != null).ToList();
+            foreach (Raid raid in raids.Where(r => r.MinUserDeadLineUTC < DateTimeOffset.UtcNow && r.StartTimeUTC > DateTimeOffset.UtcNow))
+            {
+                Poll poll = _pollService.GetPoll(raid.MinUserPollId.Value);
+
+                if (poll.Answers.Count == 0) continue;
+                if (poll.Answers.Where(a => a.PollOptionId == null).Any()) continue;
+
+                int noOptionId = poll.Options.First(o => o.Name == Constants.Polls.NO).PollOptionId;
+                if(poll.Answers.Where(a => a.PollOptionId == noOptionId).Any())
+                {
+                    await _discordService.SendMessageToRaidUsers("The raid is canceled.", raid);
+                }
+                else
+                {
+                    raid.MinUsers = 0;
+                    await context.SaveChangesAsync();
+                    await _discordService.SendMessageToRaidUsers("The raid will take place. Signing up is allowed again.", raid);
+                    await _discordService.PostRaidMessage(raid.RaidId);
+                }
+            }
+        }
     }
 }
diff --git a/Lieb/Data/TimerService.cs b/Lieb/Data/TimerService.cs
index d1814fe..4d6d6f5 100644
--- a/Lieb/Data/TimerService.cs
+++ b/Lieb/Data/TimerService.cs
@@ -49,6 +49,8 @@ namespace Lieb.Data
                         .GetRequiredService<RaidService>();
                 await raidService.SendReminders();
                 await raidService.RemoveMaybes();
+                await raidService.CheckMinUsers();
+                await raidService.CheckMinUserPollResult();
             }
         }
 
diff --git a/Lieb/Models/GuildWars2/Raid/Raid.cs b/Lieb/Models/GuildWars2/Raid/Raid.cs
index de8eed1..126f522 100644
--- a/Lieb/Models/GuildWars2/Raid/Raid.cs
+++ b/Lieb/Models/GuildWars2/Raid/Raid.cs
@@ -14,6 +14,10 @@ namespace Lieb.Models.GuildWars2.Raid
 
         public DateTimeOffset FreeForAllTimeUTC { get; set; }
 
+        public DateTimeOffset MinUserDeadLineUTC { get; set; }
+
+        public int? MinUserPollId { get; set; }
+
         public ICollection<RaidSignUp> SignUps { get; set; } = new HashSet<RaidSignUp>();
 
         public Raid() { }
@@ -24,6 +28,7 @@ namespace Lieb.Models.GuildWars2.Raid
             StartTimeUTC = TimeZoneInfo.ConvertTimeToUtc(template.StartTime, timeZone);
             EndTimeUTC = TimeZoneInfo.ConvertTimeToUtc(template.EndTime, timeZone);
             FreeForAllTimeUTC = TimeZoneInfo.ConvertTimeToUtc(template.FreeForAllTime, timeZone);
+            MinUserDeadLineUTC = TimeZoneInfo.ConvertTimeToUtc(template.MinUserDeadLine, timeZone);
         }
 
     }
diff --git a/Lieb/Models/GuildWars2/Raid/RaidBase.cs b/Lieb/Models/GuildWars2/Raid/RaidBase.cs
index 228e0e3..f4375f7 100644
--- a/Lieb/Models/GuildWars2/Raid/RaidBase.cs
+++ b/Lieb/Models/GuildWars2/Raid/RaidBase.cs
@@ -52,7 +52,8 @@ namespace Lieb.Models.GuildWars2.Raid
 
         public ulong? RaidOwnerId { get; set; }
 
-        //role name, number of spots
+        public int MinUsers { get; set; } = 0;
+
         public ICollection<RaidRole> Roles { get; set; } = new HashSet<RaidRole>();
 
         public ICollection<RaidReminder> Reminders { get; set; } = new List<RaidReminder>();
@@ -73,6 +74,7 @@ namespace Lieb.Models.GuildWars2.Raid
             this.MoveFlexUsers = template.MoveFlexUsers;
             this.RaidOwnerId = template.RaidOwnerId;
             this.EventType = template.EventType;
+            this.MinUsers = template.MinUsers;
 
             foreach (RaidRole role in template.Roles)
             {
diff --git a/Lieb/Models/GuildWars2/Raid/RaidTemplate.cs b/Lieb/Models/GuildWars2/Raid/RaidTemplate.cs
index a2b3f45..7c51a28 100644
--- a/Lieb/Models/GuildWars2/Raid/RaidTemplate.cs
+++ b/Lieb/Models/GuildWars2/Raid/RaidTemplate.cs
@@ -14,6 +14,8 @@ namespace Lieb.Models.GuildWars2.Raid
 
         public DateTime FreeForAllTime { get; set; }
 
+        public DateTime MinUserDeadLine { get; set; }
+
         public string TimeZone { get; set; } = String.Empty;
 
         public int Interval { get; set; }
diff --git a/Lieb/Models/Poll/Poll.cs b/Lieb/Models/Poll/Poll.cs
new file mode 100644
index 0000000..c11eb4d
--- /dev/null
+++ b/Lieb/Models/Poll/Poll.cs
@@ -0,0 +1,12 @@
+namespace Lieb.Models.Poll
+{
+    public class Poll
+    {
+        public int PollId { get; set; }
+        public string Question { get; set; }
+        public ICollection<PollOption> Options { get; set; } = new List<PollOption>();
+        public ICollection<PollAnswer> Answers { get; set; } = new List<PollAnswer>();
+        public int? RaidId { get; set; }
+
+    }
+}
diff --git a/Lieb/Models/Poll/PollAnswer.cs b/Lieb/Models/Poll/PollAnswer.cs
new file mode 100644
index 0000000..3f8be58
--- /dev/null
+++ b/Lieb/Models/Poll/PollAnswer.cs
@@ -0,0 +1,11 @@
+namespace Lieb.Models.Poll
+{
+    public class PollAnswer
+    {
+        public int PollAnswerId { get; set; }
+
+        public int? PollOptionId { get; set; }
+
+        public ulong UserId { get; set; }
+    }
+}
diff --git a/Lieb/Models/Poll/PollOption.cs b/Lieb/Models/Poll/PollOption.cs
new file mode 100644
index 0000000..2d5161b
--- /dev/null
+++ b/Lieb/Models/Poll/PollOption.cs
@@ -0,0 +1,8 @@
+namespace Lieb.Models.Poll
+{
+    public class PollOption
+    {
+        public int PollOptionId { get; set; }
+        public string Name { get; set;}
+    }
+}
diff --git a/Lieb/Pages/Raids/RaidEdit/RaidEdit.razor b/Lieb/Pages/Raids/RaidEdit/RaidEdit.razor
index 8e643a2..36b2595 100644
--- a/Lieb/Pages/Raids/RaidEdit/RaidEdit.razor
+++ b/Lieb/Pages/Raids/RaidEdit/RaidEdit.razor
@@ -115,6 +115,26 @@
         </label>
     </p>
 
+    <p>
+        <label>
+            Minimal required users:
+            <InputNumber @bind-Value="_raid.MinUsers" />
+        </label>
+    </p>
+    <p>
+        <label>
+            Minimal user deadline date:
+            <InputDate @bind-Value="_minUserDeadlineDate" />
+        </label>
+    </p>
+
+    <p>
+        <label>
+            Minimal user deadline time:
+            <input type="time" @bind="_minUserDeadlineTime" />
+        </label>
+    </p>
+
     <p>
         <label>
             Organizer:
@@ -194,6 +214,8 @@
     private DateTimeOffset _endTime;
     private DateTimeOffset _freeForAllDate = DateTime.Now.Date;
     private DateTimeOffset _freeForAllTime;
+    private DateTimeOffset _minUserDeadlineDate = DateTime.Now.Date;
+    private DateTimeOffset _minUserDeadlineTime;
 
     private List<RaidRole> _rolesToDelete = new List<RaidRole>();
     private List<RaidReminder> _remindersToDelete = new List<RaidReminder>();
@@ -240,6 +262,8 @@
                 _raidDate = _startTime.Date;
                 _freeForAllTime = await TimeZoneService.GetLocalDateTime(_raid.FreeForAllTimeUTC);
                 _freeForAllDate = _freeForAllTime.Date;
+                _minUserDeadlineTime = await TimeZoneService.GetLocalDateTime(_raid.MinUserDeadLineUTC);
+                _minUserDeadlineDate = _minUserDeadlineTime.Date;
                 foreach(RaidReminder reminder in _raid.Reminders)
                 {
                     if(reminder.TimeType == RaidReminder.ReminderTimeType.Static)
@@ -337,6 +361,7 @@
             _raid.EndTimeUTC = await TimeZoneService.GetUTCDateTime(_raidDate.Date.AddDays(1) + _endTime.TimeOfDay);
         }
         _raid.FreeForAllTimeUTC = await TimeZoneService.GetUTCDateTime(_freeForAllDate.Date + _freeForAllTime.TimeOfDay);
+        _raid.MinUserDeadLineUTC = await TimeZoneService.GetUTCDateTime(_minUserDeadlineDate.Date + _minUserDeadlineTime.TimeOfDay);
 
         if (!_raid.RaidOwnerId.HasValue)
         {
diff --git a/Lieb/Pages/Raids/RaidEdit/RaidTemplateEdit.razor b/Lieb/Pages/Raids/RaidEdit/RaidTemplateEdit.razor
index 2c5ff65..45a2048 100644
--- a/Lieb/Pages/Raids/RaidEdit/RaidTemplateEdit.razor
+++ b/Lieb/Pages/Raids/RaidEdit/RaidTemplateEdit.razor
@@ -130,6 +130,26 @@
             <input type="time" @bind="_freeForAllTime" />
         </label>
     </p>
+    <p>
+        <label>
+            Minimal required users:
+                <InputNumber @bind-Value="_template.MinUsers" />
+        </label>
+    </p>
+    <p>
+        <label>
+            Minimal user deadline date:
+                <InputDate @bind-Value="_minUserDeadlineDate" />
+        </label>
+    </p>
+
+    <p>
+        <label>
+            Minimal user deadline time:
+                <input type="time" @bind="_minUserDeadlineTime" />
+        </label>
+    </p>
+
     <p>
         <label>
             Organizer:
@@ -206,7 +226,7 @@
 
     [Parameter]
     public string raidId { get; set; }
-    
+
     [Parameter]
     public string editType { get; set; }
 
@@ -222,15 +242,17 @@
     private DateTimeOffset _endTime;
     private DateTimeOffset _freeForAllDate = DateTime.Now.Date;
     private DateTimeOffset _freeForAllTime;
+    private DateTimeOffset _minUserDeadlineDate = DateTime.Now.Date;
+    private DateTimeOffset _minUserDeadlineTime;
     private string _userTimeZone = string.Empty;
-    
+
     private List<RaidRole> _rolesToDelete = new List<RaidRole>();
     private List<RaidReminder> _remindersToDelete = new List<RaidReminder>();
     private List<DiscordRaidMessage> _messagesToDelete = new List<DiscordRaidMessage>();
 
     private List<StaticRaidReminder> _staticReminders = new List<StaticRaidReminder>();
     private List<DynamicRaidReminder> _dynamicReminders = new List<DynamicRaidReminder>();
-        
+
     private List<DiscordServer> _discordServers = new List<DiscordServer>();
     private List<LiebRole> _availabeGroups = new List<LiebRole>();
 
@@ -274,6 +296,8 @@
                 _raidDate = _startTime.Date;
                 _freeForAllTime = _template.FreeForAllTime;
                 _freeForAllDate = _freeForAllTime.Date;
+                _minUserDeadlineTime = _template.MinUserDeadLine;
+                _minUserDeadlineDate = _minUserDeadlineTime.Date;
                 foreach(RaidReminder reminder in _template.Reminders)
                 {
                     if(reminder.TimeType == RaidReminder.ReminderTimeType.Static)
@@ -290,8 +314,8 @@
             }
             else
             {
-            _template = new RaidTemplate();
-            _dynamicReminders.Add(DynamicRaidReminder.Create30MinReminder());
+                _template = new RaidTemplate();
+                _dynamicReminders.Add(DynamicRaidReminder.Create30MinReminder());
             }
         }
         else
@@ -366,6 +390,7 @@
             _template.EndTime = _raidDate.Date.AddDays(1) + _endTime.TimeOfDay;
         }
         _template.FreeForAllTime = _freeForAllDate.Date + _freeForAllTime.TimeOfDay;
+        _template.MinUserDeadLine = _minUserDeadlineDate.Date + _minUserDeadlineTime.TimeOfDay;
 
         if (!_template.RaidOwnerId.HasValue)
         {