diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee3d24217c..89662f0245 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 **Features**:
 
 - Only apply non-destructive PII rules to log bodies by default. ([#5272](https://github.com/getsentry/relay/pull/5272))
+- Add `sentry.origin` attribute to OTLP spans. ([#5294](https://github.com/getsentry/relay/pull/5294))
 
 **Breaking Changes**:
 
diff --git a/relay-server/src/services/processor/span.rs b/relay-server/src/services/processor/span.rs
index a50dd5f3a8..c9532fe8cc 100644
--- a/relay-server/src/services/processor/span.rs
+++ b/relay-server/src/services/processor/span.rs
@@ -246,6 +246,7 @@ mod tests {
             "instrumentation.scope_key": "scope_value",
             "instrumentation.version": "0.0.1",
             "resource.resource_key": "resource_value",
+            "sentry.origin": "auto.otlp.spans",
             "span_key": "span_value"
           },
           "exclusive_time": 0.0,
diff --git a/relay-spans/src/otel_to_sentry.rs b/relay-spans/src/otel_to_sentry.rs
index b3ecf582c8..4fb6e5f19a 100644
--- a/relay-spans/src/otel_to_sentry.rs
+++ b/relay-spans/src/otel_to_sentry.rs
@@ -154,6 +154,7 @@ mod tests {
             "instrumentation.version": "123.42",
             "plugin.name": "fastify -> @fastify/multipart",
             "resource.service.name": 42,
+            "sentry.origin": "auto.otlp.spans",
             "sentry.parentSampled": true,
             "sentry.sample_rate": 1,
             "sentry.status.message": "test"
@@ -199,7 +200,8 @@ mod tests {
           "status": "ok",
           "description": "middleware - fastify -> @fastify/multipart",
           "data": {
-            "sentry.name": "middleware - fastify -> @fastify/multipart"
+            "sentry.name": "middleware - fastify -> @fastify/multipart",
+            "sentry.origin": "auto.otlp.spans"
           },
           "links": [],
           "kind": "internal"
@@ -234,7 +236,8 @@ mod tests {
           "status": "ok",
           "description": "middleware - fastify -> @fastify/multipart",
           "data": {
-            "sentry.name": "middleware - fastify -> @fastify/multipart"
+            "sentry.name": "middleware - fastify -> @fastify/multipart",
+            "sentry.origin": "auto.otlp.spans"
           },
           "links": [],
           "kind": "internal"
@@ -299,7 +302,8 @@ mod tests {
             "sentry.name": "database query",
             "db.name": "database",
             "db.statement": "SELECT \"table\".\"col\" FROM \"table\" WHERE \"table\".\"col\" = %s",
-            "db.type": "sql"
+            "db.type": "sql",
+            "sentry.origin": "auto.otlp.spans"
           },
           "links": [],
           "kind": "client"
@@ -363,7 +367,8 @@ mod tests {
             "sentry.name": "database query",
             "db.name": "database",
             "db.statement": "SELECT \"table\".\"col\" FROM \"table\" WHERE \"table\".\"col\" = %s",
-            "db.type": "sql"
+            "db.type": "sql",
+            "sentry.origin": "auto.otlp.spans"
           },
           "links": [],
           "kind": "client"
@@ -414,6 +419,7 @@ mod tests {
           "data": {
             "sentry.name": "http client request",
             "http.request.method": "GET",
+            "sentry.origin": "auto.otlp.spans",
             "url.path": "/api/search?q=foobar"
           },
           "links": [],
@@ -483,7 +489,8 @@ mod tests {
           "data": {
             "sentry.name": "cmd.run",
             "process.args": "[\"node\",\"--require\",\"preflight.cjs\"]",
-            "process.info": "[41]"
+            "process.info": "[41]",
+            "sentry.origin": "auto.otlp.spans"
           },
           "links": []
         }
@@ -645,6 +652,7 @@ mod tests {
             "sentry.sdk.name": "sentry.php",
             "sentry.name": "myname",
             "sentry.metrics_summary.some_metric": "[]",
+            "sentry.origin": "auto.otlp.spans",
             "sentry.status.message": "foo"
           },
           "links": [],
@@ -677,7 +685,9 @@ mod tests {
           "trace_id": "89143b0763095bd9c9955e8175d1fb23",
           "is_remote": true,
           "status": "ok",
-          "data": {},
+          "data": {
+            "sentry.origin": "auto.otlp.spans"
+          },
           "links": []
         }
         "#);
@@ -707,7 +717,9 @@ mod tests {
           "trace_id": "89143b0763095bd9c9955e8175d1fb23",
           "is_remote": false,
           "status": "ok",
-          "data": {},
+          "data": {
+            "sentry.origin": "auto.otlp.spans"
+          },
           "links": []
         }
         "#);
@@ -737,7 +749,9 @@ mod tests {
           "trace_id": "89143b0763095bd9c9955e8175d1fb23",
           "is_remote": false,
           "status": "ok",
-          "data": {},
+          "data": {
+            "sentry.origin": "auto.otlp.spans"
+          },
           "links": [],
           "kind": "client"
         }
@@ -797,7 +811,9 @@ mod tests {
           "trace_id": "3c79f60c11214eb38604f4ae0781bfb2",
           "is_remote": false,
           "status": "ok",
-          "data": {},
+          "data": {
+            "sentry.origin": "auto.otlp.spans"
+          },
           "links": [
             {
               "trace_id": "4c79f60c11214eb38604f4ae0781bfb2",
@@ -839,6 +855,7 @@ mod tests {
           "is_remote": false,
           "status": "internal_error",
           "data": {
+            "sentry.origin": "auto.otlp.spans",
             "sentry.status.message": "2 is the error status code"
           },
           "links": []
diff --git a/relay-spans/src/otel_to_sentry_v2.rs b/relay-spans/src/otel_to_sentry_v2.rs
index 8574e13e77..2a8046dd29 100644
--- a/relay-spans/src/otel_to_sentry_v2.rs
+++ b/relay-spans/src/otel_to_sentry_v2.rs
@@ -3,6 +3,7 @@ use opentelemetry_proto::tonic::common::v1::InstrumentationScope;
 use opentelemetry_proto::tonic::resource::v1::Resource;
 use opentelemetry_proto::tonic::trace::v1::span::Link as OtelLink;
 use opentelemetry_proto::tonic::trace::v1::span::SpanKind as OtelSpanKind;
+use relay_conventions::ORIGIN;
 use relay_conventions::STATUS_MESSAGE;
 use relay_event_schema::protocol::{Attributes, SpanKind};
 use relay_otel::otel_value_to_attribute;
@@ -64,6 +65,8 @@ pub fn otel_to_sentry_span(
 
     relay_otel::otel_scope_into_attributes(&mut sentry_attributes, resource, scope);
 
+    sentry_attributes.insert(ORIGIN, "auto.otlp.spans".to_owned());
+
     let mut name = if name.is_empty() { None } else { Some(name) };
     for (key, value) in attributes.into_iter().flat_map(|attribute| {
         let value = attribute.value?.value?;
@@ -302,6 +305,10 @@ mod tests {
               "type": "double",
               "value": 1000.0
             },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            },
             "sentry.parentSampled": {
               "type": "boolean",
               "value": true
@@ -357,6 +364,10 @@ mod tests {
             "sentry.exclusive_time": {
               "type": "double",
               "value": 3200.0
+            },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
             }
           }
         }
@@ -421,6 +432,10 @@ mod tests {
             "db.type": {
               "type": "string",
               "value": "sql"
+            },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
             }
           }
         }
@@ -495,6 +510,10 @@ mod tests {
             "sentry.description": {
               "type": "string",
               "value": "index view query"
+            },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
             }
           }
         }
@@ -546,6 +565,10 @@ mod tests {
               "type": "string",
               "value": "GET"
             },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            },
             "url.path": {
               "type": "string",
               "value": "/api/search?q=foobar"
@@ -723,6 +746,10 @@ mod tests {
               "type": "string",
               "value": "myop"
             },
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            },
             "sentry.platform": {
               "type": "string",
               "value": "php"
@@ -779,7 +806,12 @@ mod tests {
           "start_timestamp": 123.0,
           "end_timestamp": 123.5,
           "links": [],
-          "attributes": {}
+          "attributes": {
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            }
+          }
         }
         "#);
     }
@@ -807,7 +839,12 @@ mod tests {
           "start_timestamp": 123.0,
           "end_timestamp": 123.5,
           "links": [],
-          "attributes": {}
+          "attributes": {
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            }
+          }
         }
         "#);
     }
@@ -836,7 +873,12 @@ mod tests {
           "start_timestamp": 123.0,
           "end_timestamp": 123.5,
           "links": [],
-          "attributes": {}
+          "attributes": {
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            }
+          }
         }
         "#);
     }
@@ -917,7 +959,12 @@ mod tests {
               }
             }
           ],
-          "attributes": {}
+          "attributes": {
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            }
+          }
         }
         "#);
     }
@@ -945,6 +992,10 @@ mod tests {
           "end_timestamp": 0.0,
           "links": [],
           "attributes": {
+            "sentry.origin": {
+              "type": "string",
+              "value": "auto.otlp.spans"
+            },
             "sentry.status.message": {
               "type": "string",
               "value": "2 is the error status code"
diff --git a/tests/integration/test_spans.py b/tests/integration/test_spans.py
index 4f7d63d90e..5663596cb5 100644
--- a/tests/integration/test_spans.py
+++ b/tests/integration/test_spans.py
@@ -758,6 +758,7 @@ def test_span_ingestion(
                 "sentry.exclusive_time": {"type": "double", "value": 500.0},
                 "sentry.is_segment": {"type": "boolean", "value": True},
                 "sentry.op": {"type": "string", "value": "default"},
+                "sentry.origin": {"type": "string", "value": "auto.otlp.spans"},
                 "sentry.segment.id": {"type": "string", "value": "d342abb1214ca182"},
                 "sentry.status": {"type": "string", "value": "ok"},
                 "user_agent.original": {
@@ -826,6 +827,7 @@ def test_span_ingestion(
                 },
                 "sentry.exclusive_time": {"type": "double", "value": 500.0},
                 "sentry.op": {"type": "string", "value": "default"},
+                "sentry.origin": {"type": "string", "value": "auto.otlp.spans"},
                 "sentry.status": {"type": "string", "value": "ok"},
                 "ui.component_name": {"type": "string", "value": "MyComponent"},
                 "user_agent.original": {
diff --git a/tests/integration/test_spansv2_otel.py b/tests/integration/test_spansv2_otel.py
index 54d6c330e3..e61ef3c060 100644
--- a/tests/integration/test_spansv2_otel.py
+++ b/tests/integration/test_spansv2_otel.py
@@ -97,6 +97,7 @@ def test_span_ingestion(
                 "type": "string",
                 "value": time_within(ts, expect_resolution="ns"),
             },
+            "sentry.origin": {"type": "string", "value": "auto.otlp.spans"},
             "ui.component_name": {"type": "string", "value": "MyComponent"},
         },
         "downsampled_retention_days": 90,