diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 04909903c..52eddfc45 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -38,6 +38,7 @@ jobs:
           - dolphinnpy
           - elasticsearch
           - elastiknn
+          - expann
           - faiss
           - flann
           - glass
diff --git a/README.md b/README.md
index dc6d42b6c..a103d80f9 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ Evaluated
 * [Vearch](https://github.com/vearch/vearch) ![https://img.shields.io/github/stars/vearch/vearch?style=social](https://img.shields.io/github/stars/vearch/vearch?style=social)
 * [Elasticsearch](https://github.com/elastic/elasticsearch) ![https://img.shields.io/github/stars/elastic/elasticsearch?style=social](https://img.shields.io/github/stars/elastic/elasticsearch?style=social): HNSW
 * [Elastiknn](https://github.com/alexklibisz/elastiknn) ![https://img.shields.io/github/stars/alexklibisz/elastiknn?style=social](https://img.shields.io/github/stars/alexklibisz/elastiknn?style=social)
+* [ExpANN](https://github.com/jacketsj/expANN) ![https://img.shields.io/github/stars/jacketsj/expANN?style=social](https://img.shields.io/github/stars/jacketsj/expANN?style=social)
 * [OpenSearch KNN](https://github.com/opensearch-project/k-NN) ![https://img.shields.io/github/stars/opensearch-project/k-NN?style=social](https://img.shields.io/github/stars/opensearch-project/k-NN?style=social)
 * [DiskANN](https://github.com/microsoft/diskann) ![https://img.shields.io/github/stars/microsoft/diskann?style=social](https://img.shields.io/github/stars/microsoft/diskann?style=social): Vamana, Vamana-PQ
 * [Vespa](https://github.com/vespa-engine/vespa) ![https://img.shields.io/github/stars/vespa-engine/vespa?style=social](https://img.shields.io/github/stars/vespa-engine/vespa?style=social)
diff --git a/ann_benchmarks/algorithms/expann/Dockerfile b/ann_benchmarks/algorithms/expann/Dockerfile
new file mode 100644
index 000000000..cad633c5b
--- /dev/null
+++ b/ann_benchmarks/algorithms/expann/Dockerfile
@@ -0,0 +1,24 @@
+FROM ann-benchmarks
+
+RUN apt update
+RUN apt install -y software-properties-common
+RUN add-apt-repository -y ppa:git-core/ppa
+RUN apt update
+RUN DEBIAN_FRONTEND=noninteractive apt install -y git make cmake g++ libaio-dev libgoogle-perftools-dev libunwind-dev clang-format libboost-dev libboost-program-options-dev libmkl-full-dev libcpprest-dev python3.10 nlohmann-json3-dev libeigen3-dev nlohmann-json3-dev valgrind
+
+ADD https://api.github.com/repos/jacketsj/expANN/git/refs/heads/ann-benchmarks-stable-v1 version.json
+RUN git clone -b main https://github.com/jacketsj/expANN.git
+RUN cd expANN && git submodule update --init --recursive
+RUN cd expANN && pip install pybind11
+RUN cd expANN && bash build.sh
+
+ENV PYTHONPATH=$PYTHONPATH:/home/app/expANN/build
+
+WORKDIR /home/app
+
+RUN python3 -c "import expann_py"
+RUN python3 -c "import expann_py_64"
+RUN python3 -c "import expann_py_128"
+RUN python3 -c "import expann_py_256"
+RUN python3 -c "import expann_py_832"
+RUN python3 -c "import expann_py_960"
diff --git a/ann_benchmarks/algorithms/expann/config.yml b/ann_benchmarks/algorithms/expann/config.yml
new file mode 100644
index 000000000..b6118c275
--- /dev/null
+++ b/ann_benchmarks/algorithms/expann/config.yml
@@ -0,0 +1,129 @@
+float:
+  any:
+  - base_args: ['@metric']
+    constructor: ExpAnnWrapper
+    disabled: false
+    docker_tag: ann-benchmarks-expann
+    module: ann_benchmarks.algorithms.expann
+    name: expann
+    run_groups:
+      rg20_10:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg20_11:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg20_13:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg20_00:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg20_01:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg20_03:
+        arg_groups: [{M: 20, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_10:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_11:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_13:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_00:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_01:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg40_03:
+        arg_groups: [{M: 40, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_10:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_11:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_13:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_00:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_01:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg60_03:
+        arg_groups: [{M: 60, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_10:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_11:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_13:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_00:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_01:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg80_03:
+        arg_groups: [{M: 80, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_10:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_11:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_13:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: True}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_00:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 0, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_01:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 1, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
+      rg150_03:
+        arg_groups: [{M: 150, ef_construction: 500, ortho_count: 1, prune_overflow: 3, use_compression: False}]
+        args: {}
+        query_args: [[10, 20, 30, 40, 50, 80, 120]]
diff --git a/ann_benchmarks/algorithms/expann/module.py b/ann_benchmarks/algorithms/expann/module.py
new file mode 100644
index 000000000..ca4c574f9
--- /dev/null
+++ b/ann_benchmarks/algorithms/expann/module.py
@@ -0,0 +1,47 @@
+import numpy as np
+import expann_py as ep_nodim
+import expann_py_64
+import expann_py_128
+import expann_py_256
+import expann_py_832
+import expann_py_960
+
+from ..base.module import BaseANN
+
+class ExpAnnWrapper(BaseANN):
+    def __init__(self, metric, index_param):
+        self._m = index_param["M"]
+        self._ef_construction = index_param["ef_construction"]
+        self._ortho_count = index_param["ortho_count"]
+        self._prune_overflow = index_param["prune_overflow"]
+        self._use_compression = index_param["use_compression"]
+        self.name = "expANN Anti-Topo Engine"
+        self.res = None
+        self.metric = metric
+        self.modules = {
+            64: expann_py_64,
+            128: expann_py_128,
+            256: expann_py_256,
+            832: expann_py_832,
+            960: expann_py_960
+        }
+
+    def get_module_for_dim(self, d):
+        for dim in sorted(self.modules.keys()):
+            if d <= dim:
+                return dim, self.modules[dim]
+        return d, ep_nodim
+
+    def fit(self, X):
+        self.dim_unpadded = X.shape[1]
+        self.dim_padded, self.epy = self.get_module_for_dim(self.dim_unpadded)
+        print("God padded dim:", self.dim_padded)
+        self.engine = self.epy.AntitopoEngine(self._m, self._ef_construction, self._ortho_count, self._prune_overflow, self._use_compression)
+        self.engine.store_many_vectors(X, self.metric == "angular")
+        self.engine.build()
+
+    def query(self, q, k):
+        return self.engine.query_k_numpy(q, k)
+
+    def set_query_arguments(self, ef_search):
+        self.engine.set_ef_search(ef_search)