diff --git a/.github/workflows/test-phpstan-extension.yml b/.github/workflows/test-phpstan-extension.yml
new file mode 100644
index 000000000..5e9ccf67d
--- /dev/null
+++ b/.github/workflows/test-phpstan-extension.yml
@@ -0,0 +1,47 @@
+name: PHPStan extension Test
+
+on:
+  push:
+    paths: &paths
+      - .github/workflows/test-phpstan-extension.yml
+      - utils/phpstan/**
+      - phpunit-utils.xml.dist
+  pull_request:
+    paths: *paths
+  schedule:
+    - cron: '0 0 1,16 * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test-phpstan-rules:
+    name: Test PHPStan extension
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.4
+          coverage: none
+
+      - name: Install dependencies
+        uses: ramsey/composer-install@v2
+        with:
+          composer-options: --prefer-dist
+
+      - name: Install PHPStan
+        run: |
+          composer bin phpstan install
+
+      - name: Test
+        run: vendor/bin/phpunit -c phpunit-utils.xml.dist --bootstrap utils/rector/tests/bootstrap.php --testsuite Phpstan
+        shell: bash
+
+      - name: Static analysis
+        run: bin/tools/phpstan/vendor/phpstan/phpstan/phpstan analyse -c utils/phpstan/phpstan.neon
+        shell: bash
diff --git a/.github/workflows/test-rector-rules.yml b/.github/workflows/test-rector-rules.yml
index 90b5074f2..27cd2e0ff 100644
--- a/.github/workflows/test-rector-rules.yml
+++ b/.github/workflows/test-rector-rules.yml
@@ -5,6 +5,7 @@ on:
     paths: &paths
       - .github/workflows/test-rector-rules.yml
       - utils/rector/**
+      - phpunit-utils.xml.dist
   pull_request:
     paths: *paths
   schedule:
@@ -39,7 +40,7 @@ jobs:
           composer bin rector install
 
       - name: Test
-        run: vendor/bin/phpunit -c phpunit-rector.xml.dist
+        run: vendor/bin/phpunit -c phpunit-utils.xml.dist --bootstrap utils/rector/tests/bootstrap.php --testsuite Rector
         shell: bash
 
       - name: Static analysis
diff --git a/composer.json b/composer.json
index 51901d40f..4861bec89 100644
--- a/composer.json
+++ b/composer.json
@@ -56,7 +56,8 @@
         "psr-4": {
             "Zenstruck\\Foundry\\": "src/",
             "Zenstruck\\Foundry\\Psalm\\": "utils/psalm",
-            "Zenstruck\\Foundry\\Utils\\Rector\\": "utils/rector/src/"
+            "Zenstruck\\Foundry\\Utils\\Rector\\": "utils/rector/src/",
+            "Zenstruck\\Foundry\\Utils\\PHPStan\\": "utils/phpstan/src/"
         },
         "files": [
             "src/functions.php",
@@ -69,7 +70,8 @@
             "Zenstruck\\Foundry\\Tests\\": ["tests/"],
             "App\\": "tests/Fixture/Maker/tmp/src",
             "App\\Tests\\": "tests/Fixture/Maker/tmp/tests",
-            "Zenstruck\\Foundry\\Utils\\Rector\\Tests\\": "utils/rector/tests/"
+            "Zenstruck\\Foundry\\Utils\\Rector\\Tests\\": "utils/rector/tests/",
+            "Zenstruck\\Foundry\\Utils\\PHPStan\\Tests\\": "utils/phpstan/tests/"
         },
         "exclude-from-classmap": ["tests/Fixture/Maker/expected", "utils/rector/tests/**/Fixtures/"]
     },
diff --git a/phpunit-rector.xml.dist b/phpunit-utils.xml.dist
similarity index 74%
rename from phpunit-rector.xml.dist
rename to phpunit-utils.xml.dist
index fd2dd3982..2c71f11f6 100644
--- a/phpunit-rector.xml.dist
+++ b/phpunit-utils.xml.dist
@@ -3,7 +3,6 @@
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          colors="true"
-         bootstrap="utils/rector/tests/bootstrap.php"
          failOnRisky="true"
          failOnWarning="true">
 
@@ -14,8 +13,12 @@
     </php>
 
     <testsuites>
-        <testsuite name="Rector">
+        <testsuite name="Rector" bootstrap="utils/rector/tests/bootstrap.php">
             <directory>./utils/rector/tests/</directory>
         </testsuite>
+        <testsuite name="Phpstan" bootstrap="utils/phpstan/tests/bootstrap.php">
+            <directory>./utils/phpstan/tests/</directory>
+        </testsuite>
     </testsuites>
 </phpunit>
+
diff --git a/utils/phpstan/extension.neon b/utils/phpstan/extension.neon
new file mode 100644
index 000000000..1c760583f
--- /dev/null
+++ b/utils/phpstan/extension.neon
@@ -0,0 +1,16 @@
+parameters:
+	foundry:
+		cannotCallStaticCreateMethodOnFactoryInstance: true
+
+parametersSchema:
+	foundry: structure([
+		cannotCallStaticCreateMethodOnFactoryInstance: anyOf(bool(), arrayOf(bool()))
+	])
+
+conditionalTags:
+	Zenstruck\Foundry\Utils\PHPStan\CannotCallStaticCreateMethodOnFactoryInstanceRule:
+		phpstan.rules.rule: %foundry.cannotCallStaticCreateMethodOnFactoryInstance%
+
+services:
+	-
+		class: Zenstruck\Foundry\Utils\PHPStan\CannotCallStaticCreateMethodOnFactoryInstanceRule
diff --git a/utils/phpstan/phpstan.neon b/utils/phpstan/phpstan.neon
new file mode 100644
index 000000000..c91d16f9f
--- /dev/null
+++ b/utils/phpstan/phpstan.neon
@@ -0,0 +1,11 @@
+parameters:
+    inferPrivatePropertyTypeFromConstructor: true
+    checkUninitializedProperties: true
+    paths:
+        - ./src
+        - ./tests
+    level: 8
+    bootstrapFiles:
+        - ./tests/bootstrap.php
+    excludePaths:
+        - ./tests/Fixtures
diff --git a/utils/phpstan/src/CannotCallStaticCreateMethodOnFactoryInstanceRule.php b/utils/phpstan/src/CannotCallStaticCreateMethodOnFactoryInstanceRule.php
new file mode 100644
index 000000000..f706f43bc
--- /dev/null
+++ b/utils/phpstan/src/CannotCallStaticCreateMethodOnFactoryInstanceRule.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace Zenstruck\Foundry\Utils\PHPStan;
+
+use PhpParser\Node;
+use PHPStan\Analyser\Scope;
+use PHPStan\Rules\Rule;
+use PHPStan\Rules\RuleErrorBuilder;
+use PHPStan\Type\ObjectType;
+use Zenstruck\Foundry\Factory;
+
+/**
+ * @implements Rule<Node\Expr\StaticCall>
+ */
+final class CannotCallStaticCreateMethodOnFactoryInstanceRule implements Rule
+{
+    private const STATIC_METHODS = [
+        'createOne' => 'create()',
+        'createMany' => 'many()->create()',
+        'createRange' => 'range()->create()',
+        'createSequence' => 'sequence()->create()',
+    ];
+
+    public function getNodeType(): string
+    {
+        return Node\Expr\StaticCall::class;
+    }
+
+    public function processNode(Node $node, Scope $scope): array
+    {
+        if (!$node->name instanceof Node\Identifier
+            || !$node->class instanceof Node\Expr) {
+            return [];
+        }
+
+        $type = $scope->getType($node->class);
+
+        $methodName = $node->name->toString();
+
+        if (
+            !\in_array($methodName, array_keys(self::STATIC_METHODS), true)
+            || !$type->isObject()->yes()
+            || !(new ObjectType(Factory::class))->accepts($type, true)->yes()
+        ) {
+            return [];
+        }
+
+        return [
+            RuleErrorBuilder::message(
+                sprintf(
+                    'Method "%s()" should not be called on an instance.',
+                    $methodName,
+                )
+            )
+                ->tip(
+                    sprintf(
+                        'Call the method statically instead: "SomeFactory::%s()", or use "$someFactory->%s" if you want to call the method on the instance.',
+                        $methodName,
+                        self::STATIC_METHODS[$methodName]
+                    )
+                )
+                ->identifier('foundry.staticMethodCalledOnInstance')
+                ->build(),
+        ];
+    }
+}
diff --git a/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/CannotCallStaticCreateMethodOnFactoryInstanceRuleTest.php b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/CannotCallStaticCreateMethodOnFactoryInstanceRuleTest.php
new file mode 100644
index 000000000..c82c2637a
--- /dev/null
+++ b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/CannotCallStaticCreateMethodOnFactoryInstanceRuleTest.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Zenstruck\Foundry\Utils\PHPStan\Tests;
+
+use PHPStan\Testing\RuleTestCase;
+use Zenstruck\Foundry\Utils\PHPStan\CannotCallStaticCreateMethodOnFactoryInstanceRule;
+use PHPStan\Rules\Rule;
+
+/**
+ * @extends RuleTestCase<CannotCallStaticCreateMethodOnFactoryInstanceRule>
+ */
+final class CannotCallStaticCreateMethodOnFactoryInstanceRuleTest extends RuleTestCase
+{
+    protected function getRule(): Rule
+    {
+        return new CannotCallStaticCreateMethodOnFactoryInstanceRule();
+    }
+
+    public function testInvalidCalls(): void
+    {
+        $this->analyse([
+            __DIR__ . '/Fixtures/invalid.php.inc',
+        ], [
+            [
+                'Method "createOne()" should not be called on an instance.
+    💡 Call the method statically instead: "SomeFactory::createOne()", or use "$someFactory->create()" if you want to call the method on the instance.',
+                6,
+            ],
+            [
+                'Method "createMany()" should not be called on an instance.
+    💡 Call the method statically instead: "SomeFactory::createMany()", or use "$someFactory->many()->create()" if you want to call the method on the instance.',
+                7,
+            ],
+            [
+                'Method "createRange()" should not be called on an instance.
+    💡 Call the method statically instead: "SomeFactory::createRange()", or use "$someFactory->range()->create()" if you want to call the method on the instance.',
+                8,
+            ],
+            [
+                'Method "createSequence()" should not be called on an instance.
+    💡 Call the method statically instead: "SomeFactory::createSequence()", or use "$someFactory->sequence()->create()" if you want to call the method on the instance.',
+                9,
+            ],
+            [
+                'Method "createOne()" should not be called on an instance.
+    💡 Call the method statically instead: "SomeFactory::createOne()", or use "$someFactory->create()" if you want to call the method on the instance.',
+                10,
+            ],
+        ]);
+    }
+
+    public function testValidCalls(): void
+    {
+        $this->analyse([
+            __DIR__ . '/Fixtures/valid.php.inc',
+        ], []);
+    }
+}
diff --git a/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/invalid.php.inc b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/invalid.php.inc
new file mode 100644
index 000000000..9280b4d26
--- /dev/null
+++ b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/invalid.php.inc
@@ -0,0 +1,10 @@
+<?php
+
+use Zenstruck\Foundry\Utils\PHPStan\Tests\Fixtures\DummyObjectFactory;
+
+$f = DummyObjectFactory::new();
+$f::createOne();
+$f::createMany(2);
+$f::createRange();
+$f::createSequence([]);
+DummyObjectFactory::new()::createOne();
diff --git a/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/valid.php.inc b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/valid.php.inc
new file mode 100644
index 000000000..d1267667b
--- /dev/null
+++ b/utils/phpstan/tests/CannotCallStaticCreateMethodOnFactoryInstance/Fixtures/valid.php.inc
@@ -0,0 +1,19 @@
+<?php
+
+// static call on class name - OK
+use Zenstruck\Foundry\Utils\PHPStan\Tests\Fixtures\DummyObjectFactory;
+
+DummyObjectFactory::createOne();
+DummyObjectFactory::createMany(2);
+DummyObjectFactory::createSequence([]);
+
+$class = DummyObjectFactory::class;
+$class::createOne();
+
+$inst = DummyObjectFactory::new();
+$inst->create();
+
+'test'::createOne();
+$foo::createOne();
+
+(new \stdClass())::createOne();
diff --git a/utils/phpstan/tests/Fixtures/DummyObject.php b/utils/phpstan/tests/Fixtures/DummyObject.php
new file mode 100644
index 000000000..4e6287fd7
--- /dev/null
+++ b/utils/phpstan/tests/Fixtures/DummyObject.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Utils\PHPStan\Tests\Fixtures;
+
+class DummyObject
+{
+    public ?int $id = null;
+
+    private function __construct()
+    {
+    }
+
+    public static function new(): static
+    {
+        return new self();
+    }
+}
diff --git a/utils/phpstan/tests/Fixtures/DummyObjectFactory.php b/utils/phpstan/tests/Fixtures/DummyObjectFactory.php
new file mode 100644
index 000000000..3e2120400
--- /dev/null
+++ b/utils/phpstan/tests/Fixtures/DummyObjectFactory.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Foundry\Utils\PHPStan\Tests\Fixtures;
+
+use Zenstruck\Foundry\ObjectFactory;
+
+final class DummyObjectFactory extends ObjectFactory
+{
+    public static function class(): string
+    {
+        return DummyObject::class;
+    }
+
+    protected function defaults(): array
+    {
+        return [];
+    }
+}
diff --git a/utils/phpstan/tests/bootstrap.php b/utils/phpstan/tests/bootstrap.php
new file mode 100644
index 000000000..eee3782d3
--- /dev/null
+++ b/utils/phpstan/tests/bootstrap.php
@@ -0,0 +1,13 @@
+<?php
+
+/*
+ * This file is part of the zenstruck/foundry package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+require \dirname(__DIR__).'/../../vendor/autoload.php';
+require \dirname(__DIR__).'/../../bin/tools/phpstan/vendor/autoload.php';