diff --git a/src/Components/ServerlessFramework.php b/src/Components/ServerlessFramework.php
index f6adbe0..c597c28 100644
--- a/src/Components/ServerlessFramework.php
+++ b/src/Components/ServerlessFramework.php
@@ -43,11 +43,13 @@ public function deploy(int $deploymentId, string $environment, array $awsCredent
         $oslsPackage = ($input->hasOption('osls4') && $input->getOption('osls4')) ? 'osls@4' : 'osls@3';
 
         $newLogs = '';
+        // The whole output ($newLogs is emptied when pushed to Bref Cloud)
+        $output = '';
 
         try {
 
             $process = $this->serverlessExec($oslsPackage, 'deploy', $environment, $awsCredentials, $options);
-            async(function () use ($process, &$newLogs) {
+            async(function () use ($process, &$newLogs, &$output) {
                 while (($chunk = $process->getStdout()->read()) !== null) {
                     if (empty($chunk)) continue;
                     foreach (self::IGNORED_LOGS as $ignoredLog) {
@@ -55,9 +57,10 @@ public function deploy(int $deploymentId, string $environment, array $awsCredent
                     }
                     IO::verbose($chunk);
                     $newLogs .= $chunk;
+                    $output .= $chunk;
                 }
             });
-            async(function () use ($process, &$newLogs) {
+            async(function () use ($process, &$newLogs, &$output) {
                 while (($chunk = $process->getStderr()->read()) !== null) {
                     if (empty($chunk)) continue;
                     foreach (self::IGNORED_LOGS as $ignoredLog) {
@@ -65,6 +68,7 @@ public function deploy(int $deploymentId, string $environment, array $awsCredent
                     }
                     IO::verbose($chunk);
                     $newLogs .= $chunk;
+                    $output .= $chunk;
                 }
             });
             // Send logs to Bref Cloud every x seconds
@@ -88,8 +92,11 @@ public function deploy(int $deploymentId, string $environment, array $awsCredent
                 $newLogs .= "Error while running 'serverless deploy', deployment failed\n";
                 IO::writeln("Error while running 'serverless deploy', deployment failed");
 
-                // Bref Cloud finds the error in the logs
-                $brefCloud->markDeploymentFinished($deploymentId, false, null, $newLogs);
+                // Bref Cloud finds the error in the logs.
+                // The stack is only known after a successful deployment: if this one created it, it is sent
+                // so that removing the environment deletes it.
+                [$stackName, $region] = $this->findCreatedStack($output) ?? [null, null];
+                $brefCloud->markDeploymentFinished($deploymentId, false, null, $newLogs, $region, $stackName);
                 return;
             }
 
@@ -116,6 +123,31 @@ public function deploy(int $deploymentId, string $environment, array $awsCredent
         }
     }
 
+    /**
+     * The stack that the deployment created, if it did.
+     *
+     * With `--verbose`, osls logs the events of the stack. The first one is the stack's own (nested stacks come after):
+     * `CREATE_IN_PROGRESS` when osls creates it, `UPDATE_IN_PROGRESS` when it already existed (e.g. deployed some
+     * other way before), and there is none when the deployment failed before CloudFormation.
+     *
+     * @return array{string, string}|null The stack name and its region.
+     */
+    public function findCreatedStack(string $output): ?array
+    {
+        if (! preg_match('/^\s*(\w+) - AWS::CloudFormation::Stack - (\S+)\s*$/m', $output, $firstStackEvent)) {
+            return null;
+        }
+        if ($firstStackEvent[1] !== 'CREATE_IN_PROGRESS') {
+            return null;
+        }
+        // "Deploying <service> to stage <stage> (<region>)"
+        if (! preg_match('/^\s*Deploying .+ to stage .+ \(([a-z0-9-]+)\)\s*$/m', $output, $deploying)) {
+            return null;
+        }
+
+        return [$firstStackEvent[2], $deploying[1]];
+    }
+
     /**
      * @param array{ accessKeyId: string, secretAccessKey: string, sessionToken: string } $awsCredentials
      * @return array<string, string>
diff --git a/tests/Components/ServerlessFrameworkTest.php b/tests/Components/ServerlessFrameworkTest.php
new file mode 100644
index 0000000..a146fdc
--- /dev/null
+++ b/tests/Components/ServerlessFrameworkTest.php
@@ -0,0 +1,94 @@
+<?php declare(strict_types=1);
+
+namespace Bref\Cli\Test\Components;
+
+use Bref\Cli\Components\ServerlessFramework;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+class ServerlessFrameworkTest extends TestCase
+{
+    /**
+     * @param array{string, string}|null $expected
+     */
+    #[DataProvider('failedDeployments')]
+    public function test_finds_the_stack_that_a_failed_deployment_created(string $output, ?array $expected): void
+    {
+        $this->assertSame($expected, (new ServerlessFramework)->findCreatedStack($output));
+    }
+
+    /**
+     * @return array<string, array{string, array{string, string}|null}>
+     */
+    public static function failedDeployments(): array
+    {
+        return [
+            'first deployment, failed in CloudFormation' => [
+                <<<'OUTPUT'
+                Deploying night-deploy-hints to stage after (eu-west-3)
+
+                Excluding development dependencies for service package
+                CREATE_IN_PROGRESS - AWS::CloudFormation::Stack - night-deploy-hints-after
+                  CREATE_IN_PROGRESS - AWS::S3::Bucket - ServerlessDeploymentBucket
+                  CREATE_IN_PROGRESS - AWS::S3::Bucket - ServerlessDeploymentBucket
+                CREATE_COMPLETE - AWS::S3::Bucket - ServerlessDeploymentBucket
+                  CREATE_IN_PROGRESS - AWS::S3::BucketPolicy - ServerlessDeploymentBucketPolicy
+                  CREATE_COMPLETE - AWS::S3::BucketPolicy - ServerlessDeploymentBucketPolicy
+                  CREATE_COMPLETE - AWS::CloudFormation::Stack - night-deploy-hints-after
+                Uploading CloudFormation file to S3
+                Uploading State file to S3
+                Uploading service night-deploy-hints.zip file to S3 (1.18 MB)
+                UPDATE_IN_PROGRESS - AWS::CloudFormation::Stack - night-deploy-hints-after
+                  CREATE_IN_PROGRESS - AWS::Lambda::Function - HelloLambdaFunction
+                CREATE_FAILED - AWS::Lambda::Function - HelloLambdaFunction
+                  UPDATE_ROLLBACK_IN_PROGRESS - AWS::CloudFormation::Stack - night-deploy-hints-after
+                  UPDATE_ROLLBACK_COMPLETE - AWS::CloudFormation::Stack - night-deploy-hints-after
+
+                × Stack night-deploy-hints-after failed to deploy (469s)
+                Environment: darwin, node 26.0.0, framework 3.61.0
+                Credentials: Local, environment variables
+                Docs:        github.com/oss-serverless/serverless
+
+                Error:
+                CREATE_FAILED: HelloLambdaFunction (AWS::Lambda::Function)
+                Resource handler returned message: "Function code combined with layers exceeds the maximum allowed size of 262144000 bytes."
+
+                OUTPUT,
+                ['night-deploy-hints-after', 'eu-west-3'],
+            ],
+            // e.g. deployed with the Serverless Framework before moving to Bref Cloud
+            'the stack already existed, a nested stack is created' => [
+                <<<'OUTPUT'
+                Deploying night-deploy-hints to stage after (eu-west-3)
+
+                Excluding development dependencies for service package
+                Uploading CloudFormation file to S3
+                Uploading State file to S3
+                Uploading service night-deploy-hints.zip file to S3 (1.18 MB)
+                UPDATE_IN_PROGRESS - AWS::CloudFormation::Stack - night-deploy-hints-after
+                  CREATE_IN_PROGRESS - AWS::CloudFormation::Stack - PermissionsNestedStack
+                  CREATE_IN_PROGRESS - AWS::Lambda::Function - HelloLambdaFunction
+                CREATE_FAILED - AWS::Lambda::Function - HelloLambdaFunction
+                  UPDATE_ROLLBACK_IN_PROGRESS - AWS::CloudFormation::Stack - night-deploy-hints-after
+                  UPDATE_ROLLBACK_COMPLETE - AWS::CloudFormation::Stack - night-deploy-hints-after
+
+                × Stack night-deploy-hints-after failed to deploy (95s)
+
+                OUTPUT,
+                null,
+            ],
+            'failed before CloudFormation' => [
+                <<<'OUTPUT'
+                Environment: darwin, node 26.0.0, framework 3.61.0
+                Docs:        github.com/oss-serverless/serverless
+
+                Error:
+                Cannot resolve serverless.yml: Variables resolution errored with:
+                  - Cannot resolve variable at "provider.environment.API_KEY": Value not found at "env" source
+
+                OUTPUT,
+                null,
+            ],
+        ];
+    }
+}