diff --git a/src/sentry/api/endpoints/team_projects.py b/src/sentry/api/endpoints/team_projects.py
index 888941255d51fa..7b81b0336f18b8 100644
--- a/src/sentry/api/endpoints/team_projects.py
+++ b/src/sentry/api/endpoints/team_projects.py
@@ -6,12 +6,13 @@
 from rest_framework.request import Request
 from rest_framework.response import Response
 
-from sentry import audit_log
+from sentry import audit_log, features
 from sentry.api.api_owners import ApiOwner
 from sentry.api.api_publish_status import ApiPublishStatus
 from sentry.api.base import EnvironmentMixin, region_silo_endpoint
 from sentry.api.bases.team import TeamEndpoint, TeamPermission
 from sentry.api.fields.sentry_slug import SentrySerializerSlugField
+from sentry.api.helpers.default_inbound_filters import set_default_inbound_filters
 from sentry.api.paginator import OffsetPaginator
 from sentry.api.serializers import ProjectSummarySerializer, serialize
 from sentry.api.serializers.models.project import OrganizationProjectResponse, ProjectSerializer
@@ -182,6 +183,14 @@ def post(self, request: Request, team) -> Response:
 
             # XXX: create sample event?
 
+            # Turns on some inbound filters by default for new Javascript platform projects
+            if (
+                features.has("organizations:default-inbound-filters", team.organization)
+                and project.platform
+                and project.platform.startswith("javascript")
+            ):
+                set_default_inbound_filters(project)
+
             self.create_audit_entry(
                 request=request,
                 organization=team.organization,
diff --git a/src/sentry/api/helpers/default_inbound_filters.py b/src/sentry/api/helpers/default_inbound_filters.py
new file mode 100644
index 00000000000000..e7d99473e108a0
--- /dev/null
+++ b/src/sentry/api/helpers/default_inbound_filters.py
@@ -0,0 +1,32 @@
+from typing import Dict, List, Union
+
+from sentry.ingest import inbound_filters
+
+
+# Turns on certain inbound filters by default for project.
+def set_default_inbound_filters(project):
+    state: Dict[str, Union[bool, List[str]]] = {}
+    filters = [
+        "browser-extensions",
+        "legacy-browsers",
+        "web-crawlers",
+        "filtered-transaction",
+    ]
+
+    for filter_id in filters:
+        if filter_id == "legacy-browsers":
+            state["subfilters"] = [
+                "ie_pre_9",
+                "ie9",
+                "ie10",
+                "ie11",
+                "safari_pre_6",
+                "opera_pre_15",
+                "opera_mini_pre_8",
+                "android_pre_4",
+                "edge_pre_79",
+            ]
+        else:
+            state["active"] = True
+
+        inbound_filters.set_filter_state(filter_id, project, state)
diff --git a/tests/sentry/api/endpoints/test_team_projects.py b/tests/sentry/api/endpoints/test_team_projects.py
index a509a6d5c083af..fbce4233ee6e41 100644
--- a/tests/sentry/api/endpoints/test_team_projects.py
+++ b/tests/sentry/api/endpoints/test_team_projects.py
@@ -1,3 +1,4 @@
+from sentry.ingest import inbound_filters
 from sentry.models.project import Project
 from sentry.models.rule import Rule
 from sentry.notifications.types import FallthroughChoiceType
@@ -143,3 +144,45 @@ def test_without_default_rules(self):
         )
         project = Project.objects.get(id=response.data["id"])
         assert not Rule.objects.filter(project=project).exists()
+
+    @with_feature("organizations:default-inbound-filters")
+    def test_default_inbound_filters(self):
+        filters = ["browser-extensions", "legacy-browsers", "web-crawlers", "filtered-transaction"]
+        python_response = self.get_success_response(
+            self.organization.slug,
+            self.team.slug,
+            **self.data,
+            status_code=201,
+        )
+
+        python_project = Project.objects.get(id=python_response.data["id"])
+
+        python_filter_states = {
+            filter_id: inbound_filters.get_filter_state(filter_id, python_project)
+            for filter_id in filters
+        }
+
+        assert not python_filter_states["browser-extensions"]
+        assert not python_filter_states["legacy-browsers"]
+        assert not python_filter_states["web-crawlers"]
+        assert python_filter_states["filtered-transaction"]
+
+        project_data = {"name": "foo", "slug": "baz", "platform": "javascript-react"}
+        javascript_response = self.get_success_response(
+            self.organization.slug,
+            self.team.slug,
+            **project_data,
+            status_code=201,
+        )
+
+        javascript_project = Project.objects.get(id=javascript_response.data["id"])
+
+        javascript_filter_states = {
+            filter_id: inbound_filters.get_filter_state(filter_id, javascript_project)
+            for filter_id in filters
+        }
+
+        assert javascript_filter_states["browser-extensions"]
+        assert javascript_filter_states["legacy-browsers"]
+        assert javascript_filter_states["web-crawlers"]
+        assert javascript_filter_states["filtered-transaction"]