diff --git a/lib/kamal/secrets/adapters/doppler.rb b/lib/kamal/secrets/adapters/doppler.rb
new file mode 100644
index 00000000..1da7acb0
--- /dev/null
+++ b/lib/kamal/secrets/adapters/doppler.rb
@@ -0,0 +1,59 @@
+class Kamal::Secrets::Adapters::Doppler < Kamal::Secrets::Adapters::Base
+  private
+    def login(account)
+      unless loggedin?
+        raise RuntimeError, "Doppler CLI not logged in and no DOPPLER_TOKEN found in environment"
+      end
+    end
+
+    def loggedin?
+      `doppler me 2> /dev/null`
+      $?.success?
+    end
+
+    def fetch_secrets(secrets, account:, session:)
+      if secrets.empty?
+        raise RuntimeError, "No secrets were fetched. Please specify which secrets to fetch or use 'all' to fetch all secrets."
+      end
+
+      project_and_config_flags = ""
+      unless service_token_set?
+        project, config, _ = secrets.first.split("/")
+
+        unless project && config
+          raise RuntimeError, "You must pass the Doppler project and config in using --from PROJECT/CONFIG"
+        end
+
+        project_and_config_flags = " -p #{project.shellescape} -c #{config.shellescape}"
+      end
+
+      secret_names = secrets.collect{|s| s.split("/").last}
+
+      if secret_names.first.downcase == "all"
+        raw_secrets_json = `doppler secrets download --no-file --json#{project_and_config_flags}`
+      else
+        raw_secrets_json = `doppler secrets get --json#{project_and_config_flags} #{secret_names.map(&:shellescape).join(" ")}`
+      end
+      raise RuntimeError, "Could not read #{secrets} from Doppler" unless $?.success?
+
+      secrets_json = JSON.parse(raw_secrets_json)
+      {}.tap do |results|
+        secrets_json.each do |k, v|
+          results[k] = v["computed"] || v
+        end
+      end
+    end
+
+    def service_token_set?
+      ENV["DOPPLER_TOKEN"] && ENV["DOPPLER_TOKEN"][0,5] == "dp.st"
+    end
+
+    def check_dependencies!
+      raise RuntimeError, "Doppler CLI is not installed" unless cli_installed?
+    end
+
+    def cli_installed?
+      `doppler --version 2> /dev/null`
+      $?.success?
+    end
+end
diff --git a/test/secrets/doppler_adapter_test.rb b/test/secrets/doppler_adapter_test.rb
new file mode 100644
index 00000000..97b1c39b
--- /dev/null
+++ b/test/secrets/doppler_adapter_test.rb
@@ -0,0 +1,165 @@
+require "test_helper"
+
+class DopplerAdapterTest < SecretAdapterTestCase
+  setup do
+    ENV.delete("DOPPLER_TOKEN")
+    `true` # Ensure $? is 0
+  end
+
+  test "fetch" do
+    ENV["DOPPLER_TOKEN"] = "dp.st.xxxxxxxxxxxxxxxxxxxxxx"
+    stub_ticks.with("doppler --version 2> /dev/null")
+    stub_ticks.with("doppler me 2> /dev/null")
+
+    stub_ticks
+      .with("doppler secrets get --json HOST PORT")
+      .returns(secrets_get_json)
+
+    json = JSON.parse(shellunescape(run_command("fetch", "HOST", "PORT")))
+
+    expected_json = {
+      "HOST"=>"0.0.0.0",
+      "PORT"=>"8080"
+    }
+
+    assert_equal expected_json, json
+    ENV.delete("DOPPLER_TOKEN")
+  end
+
+  test "fetch with from" do
+    stub_ticks.with("doppler --version 2> /dev/null")
+    stub_ticks.with("doppler me 2> /dev/null")
+
+    stub_ticks
+      .with("doppler secrets get --json -p example -c dev HOST PORT")
+      .returns(secrets_get_json)
+
+    json = JSON.parse(shellunescape(run_command("fetch", "--from", "example/dev", "HOST", "PORT")))
+
+    expected_json = {
+      "HOST"=>"0.0.0.0",
+      "PORT"=>"8080"
+    }
+
+    assert_equal expected_json, json
+  end
+
+  test "fetch all" do
+    ENV["DOPPLER_TOKEN"] = "dp.st.xxxxxxxxxxxxxxxxxxxxxx"
+    stub_ticks.with("doppler --version 2> /dev/null")
+    stub_ticks.with("doppler me 2> /dev/null")
+
+    stub_ticks
+      .with("doppler secrets download --no-file --json")
+      .returns(secrets_download_json)
+
+    json = JSON.parse(shellunescape(run_command("fetch", "all")))
+
+    expected_json = {
+      "DOPPLER_PROJECT"=>"example",
+      "DOPPLER_ENVIRONMENT"=>"dev",
+      "DOPPLER_CONFIG"=>"dev",
+      "HOST"=>"0.0.0.0",
+      "PORT"=>"8080"
+    }
+
+    assert_equal expected_json, json
+    ENV.delete("DOPPLER_TOKEN")
+  end
+
+  test "fetch all with from" do
+    stub_ticks.with("doppler --version 2> /dev/null")
+    stub_ticks.with("doppler me 2> /dev/null")
+
+    stub_ticks
+      .with("doppler secrets download --no-file --json -p example -c dev")
+      .returns(secrets_download_json)
+
+    json = JSON.parse(shellunescape(run_command("fetch", "--from", "example/dev", "all")))
+
+    expected_json = {
+      "DOPPLER_PROJECT"=>"example",
+      "DOPPLER_ENVIRONMENT"=>"dev",
+      "DOPPLER_CONFIG"=>"dev",
+      "HOST"=>"0.0.0.0",
+      "PORT"=>"8080"
+    }
+
+    assert_equal expected_json, json
+  end
+
+  test "fetch without CLI installed" do
+    stub_ticks_with("doppler --version 2> /dev/null", succeed: false)
+
+    error = assert_raises RuntimeError do
+      JSON.parse(shellunescape(run_command("fetch", "HOST", "PORT")))
+    end
+    assert_equal "Doppler CLI is not installed", error.message
+  end
+
+  test "fetch without being logged in and without DOPPLER_TOKEN" do
+    stub_ticks_with("doppler --version 2> /dev/null")
+    stub_ticks_with("doppler me 2> /dev/null", succeed: false)
+
+    error = assert_raises RuntimeError do
+      JSON.parse(shellunescape(run_command("fetch", "HOST", "PORT")))
+    end
+    assert_equal "Doppler CLI not logged in and no DOPPLER_TOKEN found in environment", error.message
+  end
+
+  test "fetch with from and no secrets or 'all' specified" do
+    stub_ticks.with("doppler --version 2> /dev/null")
+    stub_ticks.with("doppler me 2> /dev/null")
+
+    error = assert_raises RuntimeError do
+      JSON.parse(shellunescape(run_command("fetch", "--from", "example/dev")))
+    end
+    assert_equal "No secrets were fetched. Please specify which secrets to fetch or use 'all' to fetch all secrets.", error.message
+  end
+
+  private
+    def run_command(*command)
+      stdouted do
+        Kamal::Cli::Secrets.start \
+          [ *command,
+            "-c", "test/fixtures/deploy_with_accessories.yml",
+            "--adapter", "doppler",
+            "--account", "-" ]
+      end
+    end
+
+    def secrets_get_json
+      <<~JSON
+        {
+          "HOST": {
+            "computed": "0.0.0.0",
+            "computedValueType": {
+              "type": "string"
+            },
+            "computedVisibility": "masked",
+            "note": ""
+          },
+          "PORT": {
+            "computed": "8080",
+            "computedValueType": {
+              "type": "string"
+            },
+            "computedVisibility": "masked",
+            "note": ""
+          }
+        }
+      JSON
+    end
+
+    def secrets_download_json
+      <<~JSON
+        {
+          "DOPPLER_CONFIG": "dev",
+          "DOPPLER_ENVIRONMENT": "dev",
+          "DOPPLER_PROJECT": "example",
+          "HOST": "0.0.0.0",
+          "PORT": "8080"
+        }
+      JSON
+    end
+end