diff --git a/lib/sentry/application.ex b/lib/sentry/application.ex
index e592ae04..8f373728 100644
--- a/lib/sentry/application.ex
+++ b/lib/sentry/application.ex
@@ -10,6 +10,11 @@ defmodule Sentry.Application do
     config = Config.validate!()
     :ok = Config.persist(config)
 
+    Config.put_config(
+      :in_app_module_allow_list,
+      Config.in_app_module_allow_list() ++ resolve_in_app_module_allow_list()
+    )
+
     http_client = Keyword.fetch!(config, :client)
 
     maybe_http_client_spec =
@@ -71,4 +76,13 @@ defmodule Sentry.Application do
       Sentry.Integrations.Quantum.Cron.attach_telemetry_handler()
     end
   end
+
+  defp resolve_in_app_module_allow_list do
+    Enum.flat_map(Config.in_app_otp_apps(), fn app ->
+      case :application.get_key(app, :modules) do
+        {:ok, modules} -> modules
+        _ -> []
+      end
+    end)
+  end
 end
diff --git a/lib/sentry/config.ex b/lib/sentry/config.ex
index d57830c7..a173e0db 100644
--- a/lib/sentry/config.ex
+++ b/lib/sentry/config.ex
@@ -388,6 +388,20 @@ defmodule Sentry.Config do
       The number of lines of source code
       before and after the line that caused the exception to report.
       """
+    ],
+    in_app_otp_apps: [
+      type: {:list, :atom},
+      default: [],
+      type_doc: "list of `t:atom/0`",
+      doc: """
+      A list of OTP application names that will be used to populate additional modules for the
+      `:in_app_module_allow_list` option. List your application (or the applications in your
+      umbrella project) for them to show as "in-app" in stacktraces in Sentry. We recommend using
+      this option over `:in_app_module_allow_list`, unless you need more control over the exact
+      modules to consider as "in-app".
+
+      *Available since v10.9.0*.
+      """
     ]
   ]
 
@@ -575,6 +589,9 @@ defmodule Sentry.Config do
   @spec report_deps?() :: boolean()
   def report_deps?, do: fetch!(:report_deps)
 
+  @spec in_app_otp_apps() :: [atom()]
+  def in_app_otp_apps, do: fetch!(:in_app_otp_apps)
+
   @spec json_library() :: module()
   def json_library, do: fetch!(:json_library)
 
diff --git a/mix.exs b/mix.exs
index acfb35fa..aa2ab7fe 100644
--- a/mix.exs
+++ b/mix.exs
@@ -136,6 +136,7 @@ defmodule Sentry.Mixfile do
 
   defp run_integration_tests_if_supported(args) do
     if Version.match?(System.version(), ">= 1.16.0") do
+      run_integration_tests("umbrella", args)
       run_integration_tests("phoenix_app", args)
     else
       Mix.shell().info("Skipping integration tests for Elixir versions < 1.16")
diff --git a/test_integrations/umbrella/.formatter.exs b/test_integrations/umbrella/.formatter.exs
new file mode 100644
index 00000000..90a08535
--- /dev/null
+++ b/test_integrations/umbrella/.formatter.exs
@@ -0,0 +1,5 @@
+# Used by "mix format"
+[
+  inputs: ["mix.exs", "config/*.exs"],
+  subdirectories: ["apps/*"]
+]
diff --git a/test_integrations/umbrella/.gitignore b/test_integrations/umbrella/.gitignore
new file mode 100644
index 00000000..013cd25e
--- /dev/null
+++ b/test_integrations/umbrella/.gitignore
@@ -0,0 +1,20 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Temporary files, for example, from tests.
+/tmp/
diff --git a/test_integrations/umbrella/README.md b/test_integrations/umbrella/README.md
new file mode 100644
index 00000000..879708a7
--- /dev/null
+++ b/test_integrations/umbrella/README.md
@@ -0,0 +1,4 @@
+# PhoenixAppUmbrella
+
+**TODO: Add description**
+
diff --git a/test_integrations/umbrella/apps/admin/.formatter.exs b/test_integrations/umbrella/apps/admin/.formatter.exs
new file mode 100644
index 00000000..d2cda26e
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/.formatter.exs
@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/test_integrations/umbrella/apps/admin/.gitignore b/test_integrations/umbrella/apps/admin/.gitignore
new file mode 100644
index 00000000..fab39365
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/.gitignore
@@ -0,0 +1,23 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+admin-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
diff --git a/test_integrations/umbrella/apps/admin/README.md b/test_integrations/umbrella/apps/admin/README.md
new file mode 100644
index 00000000..198375ec
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/README.md
@@ -0,0 +1,21 @@
+# Admin
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `admin` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:admin, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/admin>.
+
diff --git a/test_integrations/umbrella/apps/admin/lib/admin.ex b/test_integrations/umbrella/apps/admin/lib/admin.ex
new file mode 100644
index 00000000..800659cc
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/lib/admin.ex
@@ -0,0 +1,18 @@
+defmodule Admin do
+  @moduledoc """
+  Documentation for `Admin`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> Admin.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end
diff --git a/test_integrations/umbrella/apps/admin/lib/admin/settings.ex b/test_integrations/umbrella/apps/admin/lib/admin/settings.ex
new file mode 100644
index 00000000..3ce90512
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/lib/admin/settings.ex
@@ -0,0 +1,3 @@
+defmodule Admin.Settings do
+  defstruct [:key, :value]
+end
diff --git a/test_integrations/umbrella/apps/admin/mix.exs b/test_integrations/umbrella/apps/admin/mix.exs
new file mode 100644
index 00000000..34b00431
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/mix.exs
@@ -0,0 +1,33 @@
+defmodule Admin.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :admin,
+      version: "0.1.0",
+      build_path: "../../_build",
+      config_path: "../../config/config.exs",
+      deps_path: "../../deps",
+      lockfile: "../../mix.lock",
+      elixir: "~> 1.18",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"},
+      # {:sibling_app_in_umbrella, in_umbrella: true}
+    ]
+  end
+end
diff --git a/test_integrations/umbrella/apps/admin/test/admin_test.exs b/test_integrations/umbrella/apps/admin/test/admin_test.exs
new file mode 100644
index 00000000..e1e0a781
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/test/admin_test.exs
@@ -0,0 +1,8 @@
+defmodule Admin.Sentry.ConfigTest do
+  use ExUnit.Case
+
+  test "loads in_app_module_allow_list" do
+    assert Sentry.Config.in_app_module_allow_list() |> Enum.sort() ==
+             [Admin, Admin.Settings, Public, Public.User]
+  end
+end
diff --git a/test_integrations/umbrella/apps/admin/test/test_helper.exs b/test_integrations/umbrella/apps/admin/test/test_helper.exs
new file mode 100644
index 00000000..a1879af5
--- /dev/null
+++ b/test_integrations/umbrella/apps/admin/test/test_helper.exs
@@ -0,0 +1,5 @@
+Application.start(:nimble_options)
+Application.start(:nimble_ownership)
+Application.start(:sentry)
+
+ExUnit.start()
diff --git a/test_integrations/umbrella/apps/public/.formatter.exs b/test_integrations/umbrella/apps/public/.formatter.exs
new file mode 100644
index 00000000..d2cda26e
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/.formatter.exs
@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]
diff --git a/test_integrations/umbrella/apps/public/.gitignore b/test_integrations/umbrella/apps/public/.gitignore
new file mode 100644
index 00000000..c41d2839
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/.gitignore
@@ -0,0 +1,23 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+public-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
diff --git a/test_integrations/umbrella/apps/public/README.md b/test_integrations/umbrella/apps/public/README.md
new file mode 100644
index 00000000..689399f9
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/README.md
@@ -0,0 +1,21 @@
+# Public
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `public` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:public, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/public>.
+
diff --git a/test_integrations/umbrella/apps/public/lib/public.ex b/test_integrations/umbrella/apps/public/lib/public.ex
new file mode 100644
index 00000000..06632e11
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/lib/public.ex
@@ -0,0 +1,18 @@
+defmodule Public do
+  @moduledoc """
+  Documentation for `Public`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> Public.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end
diff --git a/test_integrations/umbrella/apps/public/lib/public/user.ex b/test_integrations/umbrella/apps/public/lib/public/user.ex
new file mode 100644
index 00000000..abd9bfe1
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/lib/public/user.ex
@@ -0,0 +1,3 @@
+defmodule Public.User do
+  defstruct [:id, :name]
+end
diff --git a/test_integrations/umbrella/apps/public/mix.exs b/test_integrations/umbrella/apps/public/mix.exs
new file mode 100644
index 00000000..8f6e0d6e
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/mix.exs
@@ -0,0 +1,33 @@
+defmodule Public.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :public,
+      version: "0.1.0",
+      build_path: "../../_build",
+      config_path: "../../config/config.exs",
+      deps_path: "../../deps",
+      lockfile: "../../mix.lock",
+      elixir: "~> 1.18",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"},
+      # {:sibling_app_in_umbrella, in_umbrella: true}
+    ]
+  end
+end
diff --git a/test_integrations/umbrella/apps/public/test/public_test.exs b/test_integrations/umbrella/apps/public/test/public_test.exs
new file mode 100644
index 00000000..9655c6d7
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/test/public_test.exs
@@ -0,0 +1,8 @@
+defmodule Public.Sentry.ConfigTest do
+  use ExUnit.Case
+
+  test "loads in_app_module_allow_list" do
+    assert Sentry.Config.in_app_module_allow_list() |> Enum.sort() ==
+             [Admin, Admin.Settings, Public, Public.User]
+  end
+end
diff --git a/test_integrations/umbrella/apps/public/test/test_helper.exs b/test_integrations/umbrella/apps/public/test/test_helper.exs
new file mode 100644
index 00000000..a1879af5
--- /dev/null
+++ b/test_integrations/umbrella/apps/public/test/test_helper.exs
@@ -0,0 +1,5 @@
+Application.start(:nimble_options)
+Application.start(:nimble_ownership)
+Application.start(:sentry)
+
+ExUnit.start()
diff --git a/test_integrations/umbrella/config/config.exs b/test_integrations/umbrella/config/config.exs
new file mode 100644
index 00000000..8c1d6cf0
--- /dev/null
+++ b/test_integrations/umbrella/config/config.exs
@@ -0,0 +1,27 @@
+# This file is responsible for configuring your umbrella
+# and **all applications** and their dependencies with the
+# help of the Config module.
+#
+# Note that all applications in your umbrella share the
+# same configuration and dependencies, which is why they
+# all use the same configuration file. If you want different
+# configurations or dependencies per app, it is best to
+# move said applications out of the umbrella.
+import Config
+
+# Sample configuration:
+#
+#     config :logger, :console,
+#       level: :info,
+#       format: "$date $time [$level] $metadata$message\n",
+#       metadata: [:user_id]
+#
+
+config :sentry,
+  dsn: "http://public:secret@localhost:8080/1",
+  environment_name: Mix.env(),
+  enable_source_code_context: true,
+  root_source_code_paths: [File.cwd!()],
+  test_mode: true,
+  send_result: :sync,
+  in_app_otp_apps: [:public, :admin]
diff --git a/test_integrations/umbrella/mix.exs b/test_integrations/umbrella/mix.exs
new file mode 100644
index 00000000..1d88befa
--- /dev/null
+++ b/test_integrations/umbrella/mix.exs
@@ -0,0 +1,25 @@
+defmodule Umbrella.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      apps_path: "apps",
+      version: "0.1.0",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Dependencies listed here are available only for this
+  # project and cannot be accessed from applications inside
+  # the apps folder.
+  #
+  # Run "mix help deps" for examples and options.
+  defp deps do
+    [
+      {:hackney, "~> 1.18"},
+      {:jason, "~> 1.4"},
+      {:sentry, path: "../.."}
+    ]
+  end
+end
diff --git a/test_integrations/umbrella/mix.lock b/test_integrations/umbrella/mix.lock
new file mode 100644
index 00000000..ff9454dd
--- /dev/null
+++ b/test_integrations/umbrella/mix.lock
@@ -0,0 +1,12 @@
+%{
+  "certifi": {:hex, :certifi, "2.12.0", "2d1cca2ec95f59643862af91f001478c9863c2ac9cb6e2f89780bfd8de987329", [:rebar3], [], "hexpm", "ee68d85df22e554040cdb4be100f33873ac6051387baf6a8f6ce82272340ff1c"},
+  "hackney": {:hex, :hackney, "1.20.1", "8d97aec62ddddd757d128bfd1df6c5861093419f8f7a4223823537bad5d064e2", [:rebar3], [{:certifi, "~> 2.12.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "fe9094e5f1a2a2c0a7d10918fee36bfec0ec2a979994cff8cfe8058cd9af38e3"},
+  "idna": {:hex, :idna, "6.1.1", "8a63070e9f7d0c62eb9d9fcb360a7de382448200fbbd1b106cc96d3d8099df8d", [:rebar3], [{:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "92376eb7894412ed19ac475e4a86f7b413c1b9fbb5bd16dccd57934157944cea"},
+  "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},
+  "mimerl": {:hex, :mimerl, "1.3.0", "d0cd9fc04b9061f82490f6581e0128379830e78535e017f7780f37fea7545726", [:rebar3], [], "hexpm", "a1e15a50d1887217de95f0b9b0793e32853f7c258a5cd227650889b38839fe9d"},
+  "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
+  "nimble_ownership": {:hex, :nimble_ownership, "1.0.1", "f69fae0cdd451b1614364013544e66e4f5d25f36a2056a9698b793305c5aa3a6", [:mix], [], "hexpm", "3825e461025464f519f3f3e4a1f9b68c47dc151369611629ad08b636b73bb22d"},
+  "parse_trans": {:hex, :parse_trans, "3.4.1", "6e6aa8167cb44cc8f39441d05193be6e6f4e7c2946cb2759f015f8c56b76e5ff", [:rebar3], [], "hexpm", "620a406ce75dada827b82e453c19cf06776be266f5a67cff34e1ef2cbb60e49a"},
+  "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},
+  "unicode_util_compat": {:hex, :unicode_util_compat, "0.7.0", "bc84380c9ab48177092f43ac89e4dfa2c6d62b40b8bd132b1059ecc7232f9a78", [:rebar3], [], "hexpm", "25eee6d67df61960cf6a794239566599b09e17e668d3700247bc498638152521"},
+}