diff --git a/projects/smart_open/Dockerfile b/projects/smart_open/Dockerfile
new file mode 100644
index 000000000..d353f8c13
--- /dev/null
+++ b/projects/smart_open/Dockerfile
@@ -0,0 +1,22 @@
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-python
+
+RUN git clone https://github.com/RaRe-Technologies/smart_open
+WORKDIR smart_open
+
+COPY build.sh fuzz_*.py $SRC/
diff --git a/projects/smart_open/build.sh b/projects/smart_open/build.sh
new file mode 100644
index 000000000..6da18d63c
--- /dev/null
+++ b/projects/smart_open/build.sh
@@ -0,0 +1,24 @@
+#!/bin/bash -eu
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+# Build and install project (using current CFLAGS, CXXFLAGS).
+pip3 install --upgrade pip
+pip3 install .
+
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done
diff --git a/projects/smart_open/fuzz_bytebuffer.py b/projects/smart_open/fuzz_bytebuffer.py
new file mode 100644
index 000000000..926c8ddbf
--- /dev/null
+++ b/projects/smart_open/fuzz_bytebuffer.py
@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import atheris
+import sys
+import os
+with atheris.instrument_imports():
+    from smart_open.bytebuffer import ByteBuffer
+
+def TestInput(data):
+    fdp = atheris.FuzzedDataProvider(data)
+
+    chunk_size = fdp.ConsumeIntInRange(1,100)
+    message_byte = []
+    for i in range(1,fdp.ConsumeIntInRange(1,10)):
+        message_byte.append(fdp.ConsumeBytes(chunk_size))
+
+    buffer = ByteBuffer(chunk_size = fdp.ConsumeIntInRange(1,100))
+
+    buffer.empty()
+    buffer.fill(iter(message_byte))
+    buffer.peek()
+    buffer.read(fdp.ConsumeIntInRange(1,chunk_size))
+    buffer.readline(fdp.ConsumeBytes(1))
+    buffer.empty()
+
+def main():
+    atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
+    atheris.instrument_all()
+    atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()
diff --git a/projects/smart_open/fuzz_func.py b/projects/smart_open/fuzz_func.py
new file mode 100644
index 000000000..891992021
--- /dev/null
+++ b/projects/smart_open/fuzz_func.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import atheris
+import sys
+import os
+with atheris.instrument_imports():
+    from smart_open import parse_uri
+    from smart_open import register_compressor
+
+def _handle_file(file_obj, mode):
+    return open(file_obj,mode)
+
+def TestInput(data):
+    fdp = atheris.FuzzedDataProvider(data)
+   
+    parse_uri(fdp.ConsumeString(200))
+    register_compressor(".%s"%fdp.ConsumeString(3),_handle_file)
+
+def main():
+    atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
+    atheris.instrument_all()
+    atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()
diff --git a/projects/smart_open/fuzz_util.py b/projects/smart_open/fuzz_util.py
new file mode 100644
index 000000000..db5134053
--- /dev/null
+++ b/projects/smart_open/fuzz_util.py
@@ -0,0 +1,87 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import atheris
+import sys
+with atheris.instrument_imports():
+    from smart_open.utils import *
+
+def TestInput(data):
+    if len(data) < 10:
+       return
+
+    fdp = atheris.FuzzedDataProvider(data)
+
+    #Fuzz clamp
+    clamp(
+        fdp.ConsumeInt(10),
+        fdp.ConsumeInt(10),
+        None if fdp.ConsumeBool() else fdp.ConsumeInt(10)
+    )
+
+    #Fuzz check_kwargs
+    kwargs = {}
+    for i in range(1,fdp.ConsumeIntInRange(1,10)):
+        kwargs[fdp.ConsumeString(5)]=fdp.ConsumeString(10)
+    try:
+        check_kwargs(fdp.ConsumeString(10),kwargs)
+    except TypeError as e:
+        if "is not a callable object" not in str(e):
+            raise e
+
+    #Fuzz make_range_string
+    try:
+        make_range_string(
+            None if fdp.ConsumeBool() else fdp.ConsumeInt(10),
+            None if fdp.ConsumeBool() else fdp.ConsumeInt(10)
+        )
+    except ValueError as e:
+        if "make_range_string requires either a stop or start value" not in str(e):
+            raise e
+	
+    #Fuzz content_range
+    content_range = "%s %d-%d/%d"%(
+        fdp.ConsumeString(10),
+        fdp.ConsumeInt(10),
+        fdp.ConsumeInt(10),
+        fdp.ConsumeInt(10)
+    )
+    try:
+       parse_content_range(content_range)
+    except ValueError as e:
+        error_list = [
+            "invalid literal for int() with base 10",
+            "not enough values to unpack"
+        ]
+        expected_error = False
+        for error in error_list:
+            if error in str(e):
+                expected_error = True
+        if not expected_error:
+            raise e
+
+    #Fuzz safe_urlsplit
+    try:
+        safe_urlsplit(fdp.ConsumeString(100))
+    except ValueError as e:
+        if "Invalid IPv6 URL" not in str(e):
+             raise e
+def main():
+    atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
+    atheris.instrument_all()
+    atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()
diff --git a/projects/smart_open/fuzz_zip.py b/projects/smart_open/fuzz_zip.py
new file mode 100644
index 000000000..3a7f08c09
--- /dev/null
+++ b/projects/smart_open/fuzz_zip.py
@@ -0,0 +1,51 @@
+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import atheris
+import sys
+import os
+with atheris.instrument_imports():
+    from smart_open import open
+    import zipfile
+    import tempfile
+
+def TestInput(data):
+    if len(data) < 10:
+      return
+
+    fdp = atheris.FuzzedDataProvider(data)
+
+    tmp = tempfile.NamedTemporaryFile(prefix=fdp.ConsumeString(10), suffix=fdp.ConsumeString(4), delete=False)
+    filestr = fdp.ConsumeString(100)
+
+    with open(tmp.name, 'wb') as f:
+        with zipfile.ZipFile(f, 'w') as zip:
+            zip.writestr(fdp.ConsumeString(10), filestr)
+            zip.writestr(fdp.ConsumeString(10), filestr)
+
+    with open(tmp.name, 'rb') as f:
+        with zipfile.ZipFile(f) as zip:
+            for info in zip.infolist():
+                file_bytes = zip.read(info.filename)
+                assert filestr == file_bytes.decode('utf-8')
+    os.unlink(tmp.name)
+
+def main():
+    atheris.Setup(sys.argv, TestInput, enable_python_coverage=True)
+    atheris.instrument_all()
+    atheris.Fuzz()
+
+if __name__ == "__main__":
+  main()
diff --git a/projects/smart_open/project.yaml b/projects/smart_open/project.yaml
new file mode 100644
index 000000000..952682d98
--- /dev/null
+++ b/projects/smart_open/project.yaml
@@ -0,0 +1,12 @@
+fuzzing_engines:
+- libfuzzer
+homepage: https://github.com/RaRe-Technologies/smart_open
+language: python
+main_repo: https://github.com/RaRe-Technologies/smart_open
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com
+- adam@adalogics.com
+- arthur.chan@adalogics.com