diff --git a/lib/systemd_mon/notifiers/flowdock.rb b/lib/systemd_mon/notifiers/flowdock.rb
new file mode 100644
index 0000000..fb1e6d3
--- /dev/null
+++ b/lib/systemd_mon/notifiers/flowdock.rb
@@ -0,0 +1,80 @@
+require 'systemd_mon/error'
+require 'systemd_mon/notifiers/base'
+
+begin
+  require 'flowdock'
+rescue LoadError
+  raise SystemdMon::NotifierDependencyError, "The 'flowdock' gem is required by the flowdock notifier"
+end
+
+module SystemdMon::Notifiers
+  class Flowdock < Base
+    def initialize(*)
+      super
+      self.client = ::Flowdock::Client.new(flow_token: options['token'])
+    end
+
+    def notify_start!(hostname)
+      thread_id = "systemd_mon-#{hostname}"
+      title = "SystemdMon is starting on #{hostname}"
+      message = ""
+      chat title, message, thread_id, 'green', "starting"
+    end
+
+    def notify_stop!(hostname)
+      thread_id = "systemd_mon-#{hostname}"
+      title = "SystemdMon is stopping on #{hostname}"
+      message = ""
+      chat title, message, thread_id, 'yellow', "stopping"
+    end
+
+    def notify!(notification)
+      unit = notification.unit
+
+      title = "#{notification.type_text}: #{unit.name} on #{notification.hostname}: #{unit.state_change.status_text}"
+      message = "Systemd unit #{unit.name} on #{notification.hostname} #{unit.state_change.status_text}: #{unit.state.active} (#{unit.state.sub})"
+
+      if unit.state_change.length > 1
+        message << SystemdMon::Formatters::StateTableFormatter.new(unit).as_text
+      end
+
+      thread_id = "#{unit.name}-#{notification.hostname}"
+
+      chat title, message, thread_id, color(notification.type), unit.state.active
+
+      log "sent flowdock notification"
+    end
+
+  protected
+    attr_accessor :client, :options
+
+    def chat(title, message, thread_id, shade, status)
+      client.post_to_thread(
+         event: "activity",
+         title: title,
+	 external_thread_id: thread_id,
+	 thread: {
+	    title: title,
+	    body: message,
+	    status: {
+	       color: shade,
+ 	       value: status
+	    }
+         }
+      )
+    end
+
+    def color(type)
+      case type
+      when :alert
+        'red'
+      when :warning
+        'yellow'
+      when :info
+        'purple'
+      else
+        'green'
+      end
+    end
+  end
+end