diff --git a/sentry_sdk/_types.py b/sentry_sdk/_types.py
index 95e4ac3ba3..b955797dd4 100644
--- a/sentry_sdk/_types.py
+++ b/sentry_sdk/_types.py
@@ -42,3 +42,5 @@
     ]
     SessionStatus = Literal["ok", "exited", "crashed", "abnormal"]
     EndpointType = Literal["store", "envelope"]
+
+    FlushCallback = Callable[[int, float], None]
diff --git a/sentry_sdk/consts.py b/sentry_sdk/consts.py
index 59185c579a..aeb6449ea2 100644
--- a/sentry_sdk/consts.py
+++ b/sentry_sdk/consts.py
@@ -12,6 +12,7 @@
     from typing_extensions import TypedDict
 
     from sentry_sdk.transport import Transport
+    from sentry_sdk.worker import Worker
     from sentry_sdk.integrations import Integration
 
     from sentry_sdk._types import (
@@ -57,6 +58,7 @@ def __init__(
         default_integrations=True,  # type: bool
         dist=None,  # type: Optional[str]
         transport=None,  # type: Optional[Union[Transport, Type[Transport], Callable[[Event], None]]]
+        worker=None,  # type: Optional[Type[Worker]]
         sample_rate=1.0,  # type: float
         send_default_pii=False,  # type: bool
         http_proxy=None,  # type: Optional[str]
diff --git a/sentry_sdk/transport.py b/sentry_sdk/transport.py
index 47d9ff6e35..73d26deb71 100644
--- a/sentry_sdk/transport.py
+++ b/sentry_sdk/transport.py
@@ -8,7 +8,7 @@
 from datetime import datetime, timedelta
 
 from sentry_sdk.utils import Dsn, logger, capture_internal_exceptions, json_dumps
-from sentry_sdk.worker import BackgroundWorker
+from sentry_sdk.worker import make_worker
 from sentry_sdk.envelope import Envelope
 
 from sentry_sdk._types import MYPY
@@ -126,7 +126,11 @@ def __init__(
 
         Transport.__init__(self, options)
         assert self.parsed_dsn is not None
-        self._worker = BackgroundWorker()
+
+        worker = make_worker(options)
+        assert worker is not None
+
+        self._worker = worker
         self._auth = self.parsed_dsn.to_auth("sentry.python/%s" % VERSION)
         self._disabled_until = {}  # type: Dict[DataCategory, datetime]
         self._retry = urllib3.util.Retry()
diff --git a/sentry_sdk/worker.py b/sentry_sdk/worker/__init__.py
similarity index 68%
rename from sentry_sdk/worker.py
rename to sentry_sdk/worker/__init__.py
index 8550f1081c..f953d4edb0 100644
--- a/sentry_sdk/worker.py
+++ b/sentry_sdk/worker/__init__.py
@@ -9,15 +9,51 @@
 from sentry_sdk._types import MYPY
 
 if MYPY:
-    from typing import Any
     from typing import Optional
     from typing import Callable
+    from typing import Dict
+    from typing import Any
+
+    from sentry_sdk._types import FlushCallback
 
 
 _TERMINATOR = object()
 
 
-class BackgroundWorker(object):
+class Worker(object):
+    """
+    Base interface for task queue based worker.
+    """
+
+    @property
+    def is_alive(self):
+        # type: () -> bool
+        return False
+
+    def start(self):
+        # type: () -> None
+        """Start task queue processing."""
+        raise NotImplementedError()
+
+    def kill(self):
+        # type: () -> None
+        """
+        Stop task queue processing. Returns immediately. Not useful
+        for waiting on shutdown for events, use `flush` for that.
+        """
+
+    def flush(self, timeout, callback=None):
+        # type: (float, Optional[FlushCallback]) -> None
+        """Wait `timeout` seconds for the current tasks to be finished."""
+        pass
+
+    def submit(self, callback):
+        # type: (Callable[[], None]) -> None
+        """Submit new task to the queue"""
+        raise NotImplementedError()
+
+
+class BackgroundWorker(Worker):
     def __init__(self, queue_size=30):
         # type: (int) -> None
         check_thread_support()
@@ -63,7 +99,7 @@ def start(self):
         with self._lock:
             if not self.is_alive:
                 self._thread = threading.Thread(
-                    target=self._target, name="raven-sentry.BackgroundWorker"
+                    target=self._target, name="sentry_sdk.BackgroundWorker"
                 )
                 self._thread.setDaemon(True)
                 self._thread.start()
@@ -71,6 +107,8 @@ def start(self):
 
     def kill(self):
         # type: () -> None
+        # FIXME: This doesn't actually do what it claims. Putting the terminator
+        #        on the queue means it will execute all the other tasks first.
         """
         Kill worker thread. Returns immediately. Not useful for
         waiting on shutdown for events, use `flush` for that.
@@ -87,7 +125,7 @@ def kill(self):
                 self._thread_for_pid = None
 
     def flush(self, timeout, callback=None):
-        # type: (float, Optional[Any]) -> None
+        # type: (float, Optional[FlushCallback]) -> None
         logger.debug("background worker got flush request")
         with self._lock:
             if self.is_alive and timeout > 0.0:
@@ -95,7 +133,7 @@ def flush(self, timeout, callback=None):
         logger.debug("background worker flushed")
 
     def _wait_flush(self, timeout, callback):
-        # type: (float, Optional[Any]) -> None
+        # type: (float, Optional[FlushCallback]) -> None
         initial_timeout = min(0.1, timeout)
         if not self._timed_queue_join(initial_timeout):
             pending = self._queue.qsize()
@@ -126,3 +164,18 @@ def _target(self):
             finally:
                 self._queue.task_done()
             sleep(0)
+
+
+def make_worker(options):
+    # type: (Dict[str, Any]) -> Optional[Worker]
+    ref_worker = options["worker"]
+
+    # If no worker is given, we use the background worker class
+    if ref_worker is None:
+        return BackgroundWorker()
+    elif isinstance(ref_worker, Worker):
+        return ref_worker
+    elif isinstance(ref_worker, type) and issubclass(ref_worker, Worker):
+        return ref_worker()
+    else:
+        return None
diff --git a/sentry_sdk/worker/gevent_worker.py b/sentry_sdk/worker/gevent_worker.py
new file mode 100644
index 0000000000..d8c2da0176
--- /dev/null
+++ b/sentry_sdk/worker/gevent_worker.py
@@ -0,0 +1,114 @@
+from sentry_sdk.integrations import DidNotEnable
+from sentry_sdk.worker import Worker
+from sentry_sdk.utils import logger
+
+try:
+    import gevent  # type: ignore
+
+    from gevent.event import Event  # type: ignore
+    from gevent.lock import RLock  # type: ignore
+    from gevent.queue import Empty, Full, JoinableQueue  # type: ignore
+except ImportError:
+    raise DidNotEnable("gevent not installed")
+
+from sentry_sdk._types import MYPY
+
+if MYPY:
+    from typing import Optional
+    from typing import Callable
+
+    from sentry_sdk._types import FlushCallback
+
+
+class GeventWorker(Worker):
+    def __init__(self, queue_size=30):
+        # type: (int) -> None
+        self._queue_size = queue_size
+        self._queue = JoinableQueue(self._queue_size)
+        self._kill_event = Event()
+        self._lock = RLock()
+        self._greenlet = None
+
+    @property
+    def is_alive(self):
+        # type: () -> bool
+        if not self._greenlet:
+            return False
+        return not self._greenlet.dead
+
+    def _ensure_greenlet(self):
+        # type: () -> None
+        if not self.is_alive:
+            self.start()
+
+    def start(self):
+        # type: () -> None
+        with self._lock:
+            if not self.is_alive:
+                self._greenlet = gevent.spawn(_task_loop, self._queue, self._kill_event)
+
+    def kill(self):
+        # type: () -> None
+        logger.debug("gevent worker got kill request")
+        with self._lock:
+            if self._greenlet:
+                self._kill_event.set()
+                self._greenlet.join(timeout=0.5)
+                if not self._greenlet.dead:
+                    # Forcibly kill greenlet
+                    logger.warning("gevent worker failed to terminate gracefully.")
+                    self._greenlet.kill(block=False)
+                self._greenlet = None
+                self._queue = JoinableQueue(self._queue_size)
+                self._kill_event = Event()
+
+    def flush(self, timeout, callback=None):
+        # type: (float, Optional[FlushCallback]) -> None
+        logger.debug("gevent worker got flush request")
+        with self._lock:
+            if self.is_alive and timeout > 0.0:
+                self._wait_flush(timeout, callback)
+        logger.debug("gevent worker flushed")
+
+    def _wait_flush(self, timeout, callback):
+        # type: (float, Optional[FlushCallback]) -> None
+        initial_timeout = min(0.1, timeout)
+        if not self._queue.join(initial_timeout):
+            pending = self._queue.qsize()
+            logger.debug("%d event(s) pending on flush", pending)
+            if callback is not None:
+                callback(pending, timeout)
+            self._queue.join(timeout - initial_timeout)
+
+    def submit(self, callback):
+        # type: (Callable[[], None]) -> None
+        self._ensure_greenlet()
+        try:
+            self._queue.put_nowait(callback)
+        except Full:
+            logger.debug("gevent worker queue full, dropping event")
+
+
+def _task_loop(queue, kill_event):
+    # type: (JoinableQueue, Event) -> None
+    while True:
+        try:
+            callback = queue.get(timeout=0.1)
+            if kill_event.is_set():
+                # NOTE: We want to kill before executing the task, but we also need
+                #       to be able to kill on an empty queue, so we raise Empty to
+                #       avoid code duplciation
+                raise Empty
+            try:
+                callback()
+            except Exception:
+                logger.error("Failed processing job", exc_info=True)
+            finally:
+                queue.task_done()
+        except Empty:
+            pass
+
+        if kill_event.is_set():
+            logger.debug("gevent worker killed")
+            break
+        gevent.sleep(0)
diff --git a/setup.py b/setup.py
index 59aef3600c..44e5a70827 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@ def get_file_text(file_name):
     with open(os.path.join(here, file_name)) as in_file:
         return in_file.read()
 
-    
+
 setup(
     name="sentry-sdk",
     version="0.19.4",
@@ -53,6 +53,7 @@ def get_file_text(file_name):
         "pyspark": ["pyspark>=2.4.4"],
         "pure_eval": ["pure_eval", "executing", "asttokens"],
         "chalice": ["chalice>=1.16.0"],
+        "gevent": ["gevent>=1.4.0"],
     },
     classifiers=[
         "Development Status :: 5 - Production/Stable",
diff --git a/tests/test_transport.py b/tests/test_transport.py
index 96145eb951..2baa11734b 100644
--- a/tests/test_transport.py
+++ b/tests/test_transport.py
@@ -9,6 +9,7 @@
 from sentry_sdk import Hub, Client, add_breadcrumb, capture_message
 from sentry_sdk.transport import _parse_rate_limits
 from sentry_sdk.integrations.logging import LoggingIntegration
+from sentry_sdk.worker.gevent_worker import GeventWorker
 
 
 @pytest.fixture
@@ -25,6 +26,7 @@ def inner(**kwargs):
 @pytest.mark.parametrize("debug", (True, False))
 @pytest.mark.parametrize("client_flush_method", ["close", "flush"])
 @pytest.mark.parametrize("use_pickle", (True, False))
+@pytest.mark.parametrize("worker", (None, GeventWorker))
 def test_transport_works(
     httpserver,
     request,
@@ -34,11 +36,16 @@ def test_transport_works(
     make_client,
     client_flush_method,
     use_pickle,
+    worker,
     maybe_monkeypatched_threading,
 ):
+    if worker == GeventWorker:
+        if maybe_monkeypatched_threading != "gevent":
+            pytest.skip("GeventWorker requires gevent.monkey")
+
     httpserver.serve_content("ok", 200)
     caplog.set_level(logging.DEBUG)
-    client = make_client(debug=debug)
+    client = make_client(debug=debug, worker=worker)
 
     if use_pickle:
         client = pickle.loads(pickle.dumps(client))
diff --git a/tests/worker/__init__.py b/tests/worker/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/tests/worker/test_gevent.py b/tests/worker/test_gevent.py
new file mode 100644
index 0000000000..4737d01ed8
--- /dev/null
+++ b/tests/worker/test_gevent.py
@@ -0,0 +1,87 @@
+import gevent
+import logging
+
+from sentry_sdk.worker.gevent_worker import GeventWorker
+
+try:
+    from unittest import mock  # python 3.3 and above
+except ImportError:
+    import mock  # python < 3.3
+
+
+SKIP_REASON = "gevent missing or broken"
+
+
+def test_start():
+    worker = GeventWorker()
+    worker.start()
+    assert worker.is_alive
+    assert worker._greenlet is not None
+    assert not worker._greenlet.dead
+    worker.kill()
+
+
+def test_kill():
+    worker = GeventWorker()
+    worker.start()
+
+    greenlet = worker._greenlet
+    worker.kill()
+    assert not worker.is_alive
+    assert worker._greenlet is None
+    assert greenlet.dead
+
+
+def test_kill_stalling_task(sentry_init, caplog):
+    sentry_init(debug=True)
+    worker = GeventWorker()
+
+    task = mock.Mock(side_effect=lambda: gevent.sleep(2))
+    worker.submit(task)
+    assert worker._queue.qsize() == 1
+
+    gevent.sleep(0)
+    assert task.called
+
+    worker.kill()
+    assert not worker.is_alive
+    assert worker._greenlet is None
+    assert "gevent worker failed to terminate" in caplog.text
+
+
+def test_submit(sentry_init, caplog):
+    sentry_init(debug=True)
+    worker = GeventWorker(queue_size=1)
+    assert worker._queue.qsize() == 0
+    task_1 = mock.Mock()
+
+    worker.submit(task_1)
+    assert worker._queue.qsize() == 1
+
+    with caplog.at_level(logging.DEBUG):
+        task_2 = mock.Mock()
+        worker.submit(task_2)
+        assert worker._queue.qsize() == 1
+        assert "gevent worker queue full" in caplog.text
+
+    worker.kill()
+
+
+def test_flush():
+    worker = GeventWorker()
+
+    task_1 = mock.Mock()
+    worker.submit(task_1)
+
+    task_2 = mock.Mock()
+    worker.submit(task_2)
+    assert worker._queue.qsize() == 2
+    assert not task_1.called
+    assert not task_2.called
+
+    worker.flush(0.01)
+    assert worker._queue.qsize() == 0
+    assert task_1.called
+    assert task_2.called
+
+    worker.kill()