diff --git a/Gemfile b/Gemfile
index 2bf9d93776..60a86bac84 100644
--- a/Gemfile
+++ b/Gemfile
@@ -202,6 +202,9 @@ gem "sentry-delayed_job", '~> 5.3.0'
 gem "sentry-rails", '~> 5.3.0'
 gem "sentry-ruby", '~> 5.3.0'
 
+# Appsignal integration
+gem "appsignal", "~> 3.0", require: false
+
 group :test do
   gem 'launchy', '~> 2.5.0'
   gem 'rack-test', '~> 1.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d27c2f9db0..bc2258c0e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -282,6 +282,8 @@ GEM
       airbrake-ruby (~> 6.0)
     airbrake-ruby (6.1.0)
       rbtree3 (~> 0.5)
+    appsignal (3.0.27)
+      rack
     ast (2.4.2)
     attr_required (1.0.1)
     auto_strip_attributes (2.6.0)
@@ -1015,6 +1017,7 @@ DEPENDENCIES
   acts_as_tree (~> 2.9.0)
   addressable (~> 2.8.0)
   airbrake (~> 13.0.0)
+  appsignal (~> 3.0)
   auto_strip_attributes (~> 2.5)
   awesome_nested_set (~> 3.5.0)
   aws-sdk-core (~> 3.107)
diff --git a/config/initializers/appsignal.rb b/config/initializers/appsignal.rb
new file mode 100644
index 0000000000..cc86c93fdc
--- /dev/null
+++ b/config/initializers/appsignal.rb
@@ -0,0 +1,33 @@
+require 'open_project/version'
+
+if ENV['APPSIGNAL_ENABLED'] == 'true'
+  require 'appsignal'
+  OpenProject::Application.configure do |app|
+    config = {
+      active: true,
+      name: ENV.fetch('APPSIGNAL_NAME'),
+      push_api_key: ENV.fetch('APPSIGNAL_KEY'),
+      revision: OpenProject::VERSION.to_s,
+      ignore_actions: %w[OkComputerController#index OkComputerController#show]
+    }
+
+    if Rails.env.development?
+      config[:log] = 'stdout'
+      config[:debug] = true
+      config[:log_level] = 'debug'
+    end
+
+    Appsignal.config = Appsignal::Config.new(
+      Rails.root,
+      Rails.env,
+      config
+    )
+
+    app.middleware.insert_after(
+      ActionDispatch::DebugExceptions,
+      Appsignal::Rack::RailsInstrumentation
+    )
+
+    Appsignal.start
+  end
+end
diff --git a/config/puma.rb b/config/puma.rb
index 54fd04f2e6..d375917d8f 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -33,6 +33,8 @@ preload_app! if ENV["RAILS_ENV"] == 'production'
 # Allow puma to be restarted by `rails restart` command.
 plugin :tmp_restart unless ENV["RAILS_ENV"] == 'production'
 
+plugin :appsignal if ENV['APPSIGNAL_ENABLED'] == 'true'
+
 # activate statsd plugin only if a host is configured explicitly
 if OpenProject::Configuration.statsd_host.present?
   module ConfigurationViaOpenProject
diff --git a/lib/api/appsignal_api.rb b/lib/api/appsignal_api.rb
new file mode 100644
index 0000000000..898b0704a6
--- /dev/null
+++ b/lib/api/appsignal_api.rb
@@ -0,0 +1,41 @@
+#-- copyright
+# OpenProject is an open source project management software.
+# Copyright (C) 2012-2022 the OpenProject GmbH
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License version 3.
+#
+# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+# Copyright (C) 2006-2013 Jean-Philippe Lang
+# Copyright (C) 2010-2013 the ChiliProject Team
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+# See COPYRIGHT and LICENSE files for more details.
+#++
+require "appsignal"
+require "appsignal/integrations/grape"
+
+module API
+  module AppsignalAPI
+    def self.included(base)
+      base.class_eval do
+        if Appsignal.active?
+          insert_before Grape::Middleware::Error, Appsignal::Grape::Middleware
+        end
+      end
+    end
+  end
+end
diff --git a/lib/api/open_project_api.rb b/lib/api/open_project_api.rb
index dab7c66315..53ea3b5114 100644
--- a/lib/api/open_project_api.rb
+++ b/lib/api/open_project_api.rb
@@ -28,6 +28,8 @@
 
 module API
   class OpenProjectAPI < ::Grape::API
+    include ::API::AppsignalAPI
+
     class << self
       def inherited(api, *)
         super
diff --git a/lib/api/root.rb b/lib/api/root.rb
index f0bbc5129d..9d843b36a8 100644
--- a/lib/api/root.rb
+++ b/lib/api/root.rb
@@ -25,9 +25,9 @@
 #
 # See COPYRIGHT and LICENSE files for more details.
 #++
-
 module API
   class Root < ::API::RootAPI
+    include ::API::AppsignalAPI
     content_type 'hal+json', 'application/hal+json; charset=utf-8'
     format 'hal+json'
     formatter 'hal+json', API::Formatter.new
diff --git a/lib/api/root_api.rb b/lib/api/root_api.rb
index 44f93af2f9..f6b8eb72b5 100644
--- a/lib/api/root_api.rb
+++ b/lib/api/root_api.rb
@@ -35,6 +35,7 @@ require 'open_project/authentication'
 module API
   class RootAPI < Grape::API
     include OpenProject::Authentication::Scope
+    include ::API::AppsignalAPI
     extend API::Utilities::GrapeHelper
 
     insert_before Grape::Middleware::Error,