diff --git a/README.md b/README.md
index 17bd54d..7d29c73 100644
--- a/README.md
+++ b/README.md
@@ -133,7 +133,8 @@ OTel instrumentation is opt-in, controlled by environment variables:
 
 | Variable                          | Description                                                                                                           | Default         |
 | --------------------------------- | --------------------------------------------------------------------------------------------------------------------- | --------------- |
-| `OTEL_EXPORTER_OTLP_ENDPOINT`     | Base OTLP endpoint (e.g. `http://collector:4318`). If unset, no OTel setup occurs.                                    | _(disabled)_    |
+| `OTEL_EXPORTER_OTLP_ENDPOINT`     | Base OTLP endpoint (e.g. `http://collector:4318` for HTTP, `http://collector:4317` for gRPC). If unset, no OTel setup occurs. | _(disabled)_    |
+| `OTEL_EXPORTER_OTLP_PROTOCOL`     | OTLP transport: `grpc` or `http/protobuf` (default).                                                                  | `http/protobuf` |
 | `OTEL_SERVICE_NAME`               | The `service.name` resource attribute. Defaults to `flagsmith-task-processor` when running the task processor.         | `flagsmith-api` |
 | `OTEL_TRACING_EXCLUDED_URL_PATHS` | Comma-separated URL paths to exclude from tracing (e.g. `health/liveness,health/readiness`).                          | _(none)_        |
 
@@ -143,7 +144,7 @@ Standard `OTEL_*` env vars (e.g. `OTEL_RESOURCE_ATTRIBUTES`, `OTEL_EXPORTER_OTLP
 
 When `OTEL_EXPORTER_OTLP_ENDPOINT` is set, `ensure_cli_env()` sets up:
 
-- **Tracing**: `TracerProvider` with OTLP/HTTP span export, W3C `TraceContext` + `Baggage` propagation, and auto-instrumentation for:
+- **Tracing**: `TracerProvider` with OTLP span export (HTTP or gRPC, per `OTEL_EXPORTER_OTLP_PROTOCOL`), W3C `TraceContext` + `Baggage` propagation, and auto-instrumentation for:
   - **Django** (`DjangoInstrumentor`): creates a root span per HTTP request with span names formatted as `{METHOD} {route_template}` (e.g. `GET /api/v1/projects/{pk}/`).
   - **psycopg2** (`Psycopg2Instrumentor`): creates child spans for each SQL query with `db.system`, `db.statement`, and `db.name` attributes. SQL commenter is enabled, adding trace context as SQL comments for database-side correlation.
   - **Redis** (`RedisInstrumentor`): creates child spans for each Redis command with `db.system` and `db.statement` attributes.
diff --git a/pyproject.toml b/pyproject.toml
index 89a2034..079964d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,7 @@ optional-dependencies = { test-tools = [
     "inflection",
     "opentelemetry-api (>=1.25,<2)",
     "opentelemetry-sdk (>=1.25,<2)",
+    "opentelemetry-exporter-otlp-proto-grpc (>=1.25,<2)",
     "opentelemetry-exporter-otlp-proto-http (>=1.25,<2)",
     "sentry-sdk (>=2.0.0,<3.0.0)",
     "structlog (>=24.4,<26)",
diff --git a/src/common/core/constants.py b/src/common/core/constants.py
index 9e41f99..f7626c0 100644
--- a/src/common/core/constants.py
+++ b/src/common/core/constants.py
@@ -1,3 +1,7 @@
+from common.core.types import OtlpProtocol
+
 DEFAULT_PROMETHEUS_MULTIPROC_DIR_NAME = "flagsmith-prometheus"
 
 LOGGING_DEFAULT_ROOT_LOG_LEVEL = "WARNING"
+
+DEFAULT_OTLP_PROTOCOL: OtlpProtocol = "http/protobuf"
diff --git a/src/common/core/main.py b/src/common/core/main.py
index 7dec232..14c5f80 100644
--- a/src/common/core/main.py
+++ b/src/common/core/main.py
@@ -8,10 +8,12 @@
 from django.core.management import (
     execute_from_command_line as django_execute_from_command_line,
 )
-from environs import Env
+from environs import Env, validate
 
 from common.core.cli import healthcheck, run
+from common.core.constants import DEFAULT_OTLP_PROTOCOL
 from common.core.logging import setup_logging
+from common.core.types import OtlpProtocol
 from common.gunicorn.processors import make_gunicorn_access_processor
 
 env = Env()
@@ -63,6 +65,7 @@ def ensure_cli_env() -> typing.Generator[None, None, None]:
             build_otel_log_provider,
             build_tracer_provider,
             make_structlog_otel_processor,
+            resolve_otlp_export_endpoints,
             setup_tracing,
         )
 
@@ -72,17 +75,31 @@ def ensure_cli_env() -> typing.Generator[None, None, None]:
             else "flagsmith-api"
         )
         service_name = env.str("OTEL_SERVICE_NAME", default_service_name)
+        otel_protocol = typing.cast(
+            OtlpProtocol,
+            env.str(
+                "OTEL_EXPORTER_OTLP_PROTOCOL",
+                DEFAULT_OTLP_PROTOCOL,
+                validate=validate.OneOf(typing.get_args(OtlpProtocol)),
+            ),
+        )
+        traces_endpoint, logs_endpoint = resolve_otlp_export_endpoints(
+            otel_endpoint,
+            otel_protocol,
+        )
         log_provider = build_otel_log_provider(
-            endpoint=f"{otel_endpoint}/v1/logs",
+            endpoint=logs_endpoint,
             service_name=service_name,
+            protocol=otel_protocol,
         )
         otel_processors = [
             add_otel_trace_context,
             make_structlog_otel_processor(log_provider),
         ]
         tracer_provider = build_tracer_provider(
-            endpoint=f"{otel_endpoint}/v1/traces",
+            endpoint=traces_endpoint,
             service_name=service_name,
+            protocol=otel_protocol,
         )
         excluded_urls = env.str("OTEL_TRACING_EXCLUDED_URL_PATHS", None)
         ctx.enter_context(setup_tracing(tracer_provider, excluded_urls=excluded_urls))
diff --git a/src/common/core/otel.py b/src/common/core/otel.py
index 414182e..15c2087 100644
--- a/src/common/core/otel.py
+++ b/src/common/core/otel.py
@@ -11,26 +11,37 @@
 from opentelemetry import context as otel_context
 from opentelemetry._logs import SeverityNumber
 from opentelemetry.baggage.propagation import W3CBaggagePropagator
+from opentelemetry.exporter.otlp.proto.grpc._log_exporter import (
+    OTLPLogExporter as GrpcOTLPLogExporter,
+)
+from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import (
+    OTLPSpanExporter as GrpcOTLPSpanExporter,
+)
 from opentelemetry.exporter.otlp.proto.http._log_exporter import (
-    OTLPLogExporter,
+    OTLPLogExporter as HttpOTLPLogExporter,
 )
 from opentelemetry.exporter.otlp.proto.http.trace_exporter import (
-    OTLPSpanExporter,
+    OTLPSpanExporter as HttpOTLPSpanExporter,
 )
 from opentelemetry.propagate import set_global_textmap
 from opentelemetry.propagators.composite import CompositePropagator
 from opentelemetry.propagators.textmap import TextMapPropagator
 from opentelemetry.sdk._logs import LoggerProvider
-from opentelemetry.sdk._logs.export import BatchLogRecordProcessor
+from opentelemetry.sdk._logs.export import (
+    BatchLogRecordProcessor,
+    LogRecordExporter,
+)
 from opentelemetry.sdk.resources import Resource
 from opentelemetry.sdk.trace import TracerProvider
-from opentelemetry.sdk.trace.export import BatchSpanProcessor
+from opentelemetry.sdk.trace.export import BatchSpanProcessor, SpanExporter
 from opentelemetry.trace.propagation.tracecontext import (
     TraceContextTextMapPropagator,
 )
 from opentelemetry.util.types import AnyValue, Attributes
 from structlog.typing import EventDict, Processor
 
+from common.core.types import OtlpProtocol
+
 _SEVERITY_MAP: dict[str, SeverityNumber] = {
     "debug": SeverityNumber.DEBUG,
     "info": SeverityNumber.INFO,
@@ -51,6 +62,17 @@
 )
 
 
+def resolve_otlp_export_endpoints(
+    base_endpoint: str,
+    protocol: OtlpProtocol,
+) -> tuple[str, str]:
+    """Resolve trace and log exporter endpoints from a base OTLP endpoint."""
+    normalised_base = base_endpoint.rstrip("/")
+    if protocol == "grpc":
+        return normalised_base, normalised_base
+    return f"{normalised_base}/v1/traces", f"{normalised_base}/v1/logs"
+
+
 def get_otel_event_name(*, logger_name: str | None, body: str) -> str:
     """Build the event name that reaches OTel from a structlog `(logger, event)`.
 
@@ -153,20 +175,38 @@ def map_value_to_otel_value(value: object) -> str | int | float | bool:
     return json.dumps(value, default=str)
 
 
-def build_otel_log_provider(*, endpoint: str, service_name: str) -> LoggerProvider:
-    """Create and configure an OTel LoggerProvider with OTLP/HTTP export."""
+def build_otel_log_provider(
+    *,
+    endpoint: str,
+    service_name: str,
+    protocol: OtlpProtocol,
+) -> LoggerProvider:
+    """Create and configure an OTel LoggerProvider with OTLP export."""
     resource = Resource.create({"service.name": service_name})
     provider = LoggerProvider(resource=resource)
-    exporter = OTLPLogExporter(endpoint=endpoint)
+    exporter: LogRecordExporter
+    if protocol == "grpc":
+        exporter = GrpcOTLPLogExporter(endpoint=endpoint)
+    else:
+        exporter = HttpOTLPLogExporter(endpoint=endpoint)
     provider.add_log_record_processor(BatchLogRecordProcessor(exporter))
     return provider
 
 
-def build_tracer_provider(*, endpoint: str, service_name: str) -> TracerProvider:
-    """Create a TracerProvider with OTLP/HTTP export."""
+def build_tracer_provider(
+    *,
+    endpoint: str,
+    service_name: str,
+    protocol: OtlpProtocol,
+) -> TracerProvider:
+    """Create a TracerProvider with OTLP export."""
     resource = Resource.create({"service.name": service_name})
     tracer_provider = TracerProvider(resource=resource)
-    span_exporter = OTLPSpanExporter(endpoint=endpoint)
+    span_exporter: SpanExporter
+    if protocol == "grpc":
+        span_exporter = GrpcOTLPSpanExporter(endpoint=endpoint)
+    else:
+        span_exporter = HttpOTLPSpanExporter(endpoint=endpoint)
     tracer_provider.add_span_processor(BatchSpanProcessor(span_exporter))
     return tracer_provider
 
diff --git a/src/common/core/types.py b/src/common/core/types.py
new file mode 100644
index 0000000..85b85e1
--- /dev/null
+++ b/src/common/core/types.py
@@ -0,0 +1,3 @@
+from typing import Literal
+
+OtlpProtocol = Literal["grpc", "http/protobuf"]
diff --git a/tests/unit/common/core/test_main.py b/tests/unit/common/core/test_main.py
index 32b7862..0c13375 100644
--- a/tests/unit/common/core/test_main.py
+++ b/tests/unit/common/core/test_main.py
@@ -92,11 +92,13 @@ def test_ensure_cli_env__otel_endpoint_set__configures_otel_processors(
     mock_build_log.assert_called_once_with(
         endpoint="http://collector:4318/v1/logs",
         service_name="flagsmith-api",
+        protocol="http/protobuf",
     )
     mock_make_processor.assert_called_once_with(mock_log_provider)
     mock_build_tracer.assert_called_once_with(
         endpoint="http://collector:4318/v1/traces",
         service_name="flagsmith-api",
+        protocol="http/protobuf",
     )
     mock_setup_tracing.assert_called_once_with(mock_tracer_provider, excluded_urls=None)
 
@@ -137,10 +139,12 @@ def test_ensure_cli_env__otel_custom_service_name_and_excluded_urls__passes_to_p
     mock_build_log.assert_called_once_with(
         endpoint="http://collector:4318/v1/logs",
         service_name="my-service",
+        protocol="http/protobuf",
     )
     mock_build_tracer.assert_called_once_with(
         endpoint="http://collector:4318/v1/traces",
         service_name="my-service",
+        protocol="http/protobuf",
     )
     mock_setup_tracing.assert_called_once_with(
         mock_build_tracer.return_value,
@@ -213,10 +217,12 @@ def test_ensure_cli_env__argv__expected_otel_service_name(
     mock_build_log.assert_called_once_with(
         endpoint="http://collector:4318/v1/logs",
         service_name=expected_otel_service_name,
+        protocol="http/protobuf",
     )
     mock_build_tracer.assert_called_once_with(
         endpoint="http://collector:4318/v1/traces",
         service_name=expected_otel_service_name,
+        protocol="http/protobuf",
     )
 
 
@@ -247,10 +253,47 @@ def test_ensure_cli_env__env_service_name__expected_otel_service_name(
     mock_build_log.assert_called_once_with(
         endpoint="http://collector:4318/v1/logs",
         service_name="my-custom",
+        protocol="http/protobuf",
     )
     mock_build_tracer.assert_called_once_with(
         endpoint="http://collector:4318/v1/traces",
         service_name="my-custom",
+        protocol="http/protobuf",
+    )
+
+
+def test_ensure_cli_env__otel_grpc_protocol__uses_grpc_endpoints(
+    monkeypatch: pytest.MonkeyPatch,
+    mocker: MockerFixture,
+) -> None:
+    # Given
+    monkeypatch.setenv("OTEL_EXPORTER_OTLP_ENDPOINT", "http://collector:4317")
+    monkeypatch.setenv("OTEL_EXPORTER_OTLP_PROTOCOL", "grpc")
+
+    mock_build_log = mocker.patch(
+        "common.core.otel.build_otel_log_provider",
+        return_value=mocker.MagicMock(spec=LoggerProvider),
+    )
+    mock_build_tracer = mocker.patch(
+        "common.core.otel.build_tracer_provider",
+        return_value=mocker.MagicMock(spec=TracerProvider),
+    )
+    mocker.patch("common.core.otel.setup_tracing")
+
+    # When
+    with ensure_cli_env():
+        pass
+
+    # Then
+    mock_build_log.assert_called_once_with(
+        endpoint="http://collector:4317",
+        service_name="flagsmith-api",
+        protocol="grpc",
+    )
+    mock_build_tracer.assert_called_once_with(
+        endpoint="http://collector:4317",
+        service_name="flagsmith-api",
+        protocol="grpc",
     )
 
 
diff --git a/tests/unit/common/core/test_otel.py b/tests/unit/common/core/test_otel.py
index afd8a0f..0877a70 100644
--- a/tests/unit/common/core/test_otel.py
+++ b/tests/unit/common/core/test_otel.py
@@ -16,6 +16,7 @@
     build_otel_log_provider,
     build_tracer_provider,
     make_structlog_otel_processor,
+    resolve_otlp_export_endpoints,
     setup_tracing,
 )
 
@@ -187,6 +188,7 @@ def test_build_otel_log_provider__valid_args__returns_configured_provider() -> N
     provider = build_otel_log_provider(
         endpoint="http://localhost:4318/v1/logs",
         service_name="test-service",
+        protocol="http/protobuf",
     )
 
     # Then
@@ -194,11 +196,30 @@ def test_build_otel_log_provider__valid_args__returns_configured_provider() -> N
     assert provider.resource.attributes["service.name"] == "test-service"
 
 
+def test_build_otel_log_provider__grpc_protocol__uses_grpc_exporter(
+    mocker: pytest_mock.MockerFixture,
+) -> None:
+    # Given
+    mock_grpc_exporter = mocker.patch("common.core.otel.GrpcOTLPLogExporter")
+
+    # When
+    provider = build_otel_log_provider(
+        endpoint="http://localhost:4317",
+        service_name="test-service",
+        protocol="grpc",
+    )
+
+    # Then
+    assert isinstance(provider, LoggerProvider)
+    mock_grpc_exporter.assert_called_once_with(endpoint="http://localhost:4317")
+
+
 def test_build_tracer_provider__valid_args__returns_configured_provider() -> None:
     # Given / When
     provider = build_tracer_provider(
         endpoint="http://localhost:4318/v1/traces",
         service_name="test-service",
+        protocol="http/protobuf",
     )
 
     # Then
@@ -206,6 +227,64 @@ def test_build_tracer_provider__valid_args__returns_configured_provider() -> Non
     assert provider.resource.attributes["service.name"] == "test-service"
 
 
+def test_build_tracer_provider__grpc_protocol__uses_grpc_exporter(
+    mocker: pytest_mock.MockerFixture,
+) -> None:
+    # Given
+    mock_grpc_exporter = mocker.patch("common.core.otel.GrpcOTLPSpanExporter")
+
+    # When
+    provider = build_tracer_provider(
+        endpoint="http://localhost:4317",
+        service_name="test-service",
+        protocol="grpc",
+    )
+
+    # Then
+    assert isinstance(provider, TracerProvider)
+    mock_grpc_exporter.assert_called_once_with(endpoint="http://localhost:4317")
+
+
+@pytest.mark.parametrize(
+    "base_endpoint, protocol, expected_traces, expected_logs",
+    [
+        (
+            "http://collector:4318",
+            "http/protobuf",
+            "http://collector:4318/v1/traces",
+            "http://collector:4318/v1/logs",
+        ),
+        (
+            "http://collector:4318/",
+            "http/protobuf",
+            "http://collector:4318/v1/traces",
+            "http://collector:4318/v1/logs",
+        ),
+        (
+            "http://collector:4317",
+            "grpc",
+            "http://collector:4317",
+            "http://collector:4317",
+        ),
+    ],
+)
+def test_resolve_otlp_export_endpoints__protocol__returns_expected_urls(
+    base_endpoint: str,
+    protocol: str,
+    expected_traces: str,
+    expected_logs: str,
+) -> None:
+    # Given / When
+    traces_endpoint, logs_endpoint = resolve_otlp_export_endpoints(
+        base_endpoint,
+        protocol,  # type: ignore[arg-type]
+    )
+
+    # Then
+    assert traces_endpoint == expected_traces
+    assert logs_endpoint == expected_logs
+
+
 def test_setup_tracing__called__instruments_and_uninstruments_all_libraries(
     mocker: pytest_mock.MockerFixture,
 ) -> None:
diff --git a/uv.lock b/uv.lock
index e95e2f2..3ecb207 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,6 +1,11 @@
 version = 1
 revision = 3
 requires-python = ">=3.11, <4.0"
+resolution-markers = [
+    "python_full_version >= '3.14'",
+    "python_full_version == '3.13.*'",
+    "python_full_version < '3.13'",
+]
 
 [[package]]
 name = "annotated-types"
@@ -463,6 +468,7 @@ common-core = [
     { name = "gunicorn" },
     { name = "inflection" },
     { name = "opentelemetry-api" },
+    { name = "opentelemetry-exporter-otlp-proto-grpc" },
     { name = "opentelemetry-exporter-otlp-proto-http" },
     { name = "opentelemetry-instrumentation-django" },
     { name = "opentelemetry-instrumentation-psycopg2" },
@@ -485,6 +491,7 @@ flagsmith-schemas = [
 otel = [
     { name = "inflection" },
     { name = "opentelemetry-api" },
+    { name = "opentelemetry-exporter-otlp-proto-grpc" },
     { name = "opentelemetry-exporter-otlp-proto-http" },
     { name = "opentelemetry-sdk" },
     { name = "sentry-sdk" },
@@ -545,6 +552,7 @@ requires-dist = [
     { name = "inflection", marker = "extra == 'otel'" },
     { name = "opentelemetry-api", marker = "extra == 'otel'", specifier = ">=1.25,<2" },
     { name = "opentelemetry-api", marker = "extra == 'task-processor'", specifier = ">=1.25,<2" },
+    { name = "opentelemetry-exporter-otlp-proto-grpc", marker = "extra == 'otel'", specifier = ">=1.25,<2" },
     { name = "opentelemetry-exporter-otlp-proto-http", marker = "extra == 'otel'", specifier = ">=1.25,<2" },
     { name = "opentelemetry-instrumentation-django", marker = "extra == 'common-core'", specifier = ">=0.46b0,<1" },
     { name = "opentelemetry-instrumentation-psycopg2", marker = "extra == 'common-core'", specifier = ">=0.46b0,<1" },
@@ -626,6 +634,57 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/dc/82/fcb6520612bec0c39b973a6c0954b6a0d948aadfe8f7e9487f60ceb8bfa6/googleapis_common_protos-1.73.1-py3-none-any.whl", hash = "sha256:e51f09eb0a43a8602f5a915870972e6b4a394088415c79d79605a46d8e826ee8", size = 297556, upload-time = "2026-03-26T22:15:58.455Z" },
 ]
 
+[[package]]
+name = "grpcio"
+version = "1.81.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/b0/b5/1ff353970a87eda4c98251e34d2dfd214abd4982dc89119c9252a2a482d2/grpcio-1.81.1.tar.gz", hash = "sha256:6fa10a767143a5e82e8eaab53918af0cd8909a57a27f8cb2288b80a613ac671b", size = 13026582, upload-time = "2026-06-11T12:46:51.673Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/52/ea/1c2fa386b718ff493225e61cfc052ef400b4d6ffc54cbe261026432624b5/grpcio-1.81.1-cp311-cp311-linux_armv7l.whl", hash = "sha256:d71d30f2d92f67d944631c523713934fee37292469e182ebcd2c1dd8a64ce53f", size = 6093112, upload-time = "2026-06-11T12:44:52.131Z" },
+    { url = "https://files.pythonhosted.org/packages/2b/18/acf45fa8bd1bc5d7b0c2fd3dc4c209379fbd5bb396b440b68a83342226b7/grpcio-1.81.1-cp311-cp311-macosx_11_0_universal2.whl", hash = "sha256:b137f4bf3ada9dc44d411478decc6ff09a79ed30b306cd2abaa98408c3588137", size = 12074277, upload-time = "2026-06-11T12:44:55.354Z" },
+    { url = "https://files.pythonhosted.org/packages/48/d7/ee86a60699b7db039f772a2c4a7e4facc7138984ff42c0130933a0063884/grpcio-1.81.1-cp311-cp311-manylinux2014_aarch64.manylinux_2_17_aarch64.whl", hash = "sha256:a3acb384427816dd5d470f47e62137b87f74da694faa8a50147012cf40df276a", size = 6640348, upload-time = "2026-06-11T12:44:59.223Z" },
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