diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index 5c07eb0..22665ed 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -190,6 +190,7 @@
         "libhealthhalutils",
         "libhealthshim",
         "libsnapshot_cow",
+        "liblz4",
         "libsnapshot_nobinder",
         "update_metadata-protos",
     ],
@@ -254,6 +255,7 @@
         "libsparse",
         "libutils",
         "liblog",
+        "liblz4",
         "libz",
         "libdiagnose_usb",
         "libbase",
diff --git a/fs_mgr/libsnapshot/Android.bp b/fs_mgr/libsnapshot/Android.bp
index 6db8f13..dffb2e7 100644
--- a/fs_mgr/libsnapshot/Android.bp
+++ b/fs_mgr/libsnapshot/Android.bp
@@ -44,7 +44,6 @@
         "libext2_uuid",
         "libext4_utils",
         "libfstab",
-        "libsnapshot_cow",
         "libsnapshot_snapuserd",
         "libz",
     ],
@@ -154,22 +153,6 @@
         "-Wall",
         "-Werror",
     ],
-    export_include_dirs: ["include"],
-    srcs: [
-        "cow_decompress.cpp",
-        "cow_reader.cpp",
-        "cow_writer.cpp",
-        "cow_format.cpp",
-    ],
-}
-
-cc_library_static {
-    name: "libsnapshot_cow",
-    defaults: [
-        "libsnapshot_cow_defaults",
-    ],
-    host_supported: true,
-    recovery_available: true,
     shared_libs: [
         "libbase",
         "liblog",
@@ -177,7 +160,24 @@
     static_libs: [
         "libbrotli",
         "libz",
+        "liblz4",
     ],
+    export_include_dirs: ["include"],
+}
+
+cc_library_static {
+    name: "libsnapshot_cow",
+    defaults: [
+        "libsnapshot_cow_defaults",
+    ],
+    srcs: [
+        "cow_decompress.cpp",
+        "cow_reader.cpp",
+        "cow_writer.cpp",
+        "cow_format.cpp",
+    ],
+    host_supported: true,
+    recovery_available: true,
     ramdisk_available: true,
     vendor_ramdisk_available: true,
 }
@@ -214,7 +214,7 @@
 
 cc_defaults {
     name: "libsnapshot_test_defaults",
-    defaults: ["libsnapshot_defaults"],
+    defaults: ["libsnapshot_defaults", "libsnapshot_cow_defaults"],
     srcs: [
         "partition_cow_creator_test.cpp",
         "snapshot_metadata_updater_test.cpp",
@@ -295,6 +295,7 @@
 
 cc_binary {
     name: "snapshotctl",
+    defaults: ["libsnapshot_cow_defaults", "libsnapshot_hal_deps"],
     srcs: [
         "snapshotctl.cpp",
     ],
@@ -343,6 +344,9 @@
 
 cc_defaults {
     name: "libsnapshot_fuzzer_defaults",
+    defaults: [
+        "libsnapshot_cow_defaults",
+    ],
     native_coverage : true,
     srcs: [
         // Compile the protobuf definition again with type full.
@@ -416,6 +420,7 @@
     name: "cow_api_test",
     defaults: [
         "fs_mgr_defaults",
+        "libsnapshot_cow_defaults",
     ],
     srcs: [
         "cow_api_test.cpp",
@@ -471,6 +476,7 @@
         "libsparse",
         "libxz",
         "libz",
+        "liblz4",
         "libziparchive",
         "update_metadata-protos",
     ],
@@ -486,6 +492,9 @@
 
 cc_binary {
     name: "estimate_cow_from_nonab_ota",
+    defaults: [
+        "libsnapshot_cow_defaults",
+    ],
     host_supported: true,
     device_supported: false,
     cflags: [
@@ -519,6 +528,7 @@
     name: "inspect_cow",
     host_supported: true,
     device_supported: true,
+    defaults: ["libsnapshot_cow_defaults"],
     cflags: [
         "-D_FILE_OFFSET_BITS=64",
         "-Wall",
diff --git a/fs_mgr/libsnapshot/cow_decompress.cpp b/fs_mgr/libsnapshot/cow_decompress.cpp
index faceafe..a4d2277 100644
--- a/fs_mgr/libsnapshot/cow_decompress.cpp
+++ b/fs_mgr/libsnapshot/cow_decompress.cpp
@@ -20,6 +20,7 @@
 
 #include <android-base/logging.h>
 #include <brotli/decode.h>
+#include <lz4.h>
 #include <zlib.h>
 
 namespace android {
@@ -260,5 +261,43 @@
     return std::unique_ptr<IDecompressor>(new BrotliDecompressor());
 }
 
+class Lz4Decompressor final : public IDecompressor {
+  public:
+    ~Lz4Decompressor() override = default;
+
+    bool Decompress(const size_t output_size) override {
+        size_t actual_buffer_size = 0;
+        auto&& output_buffer = sink_->GetBuffer(output_size, &actual_buffer_size);
+        if (actual_buffer_size != output_size) {
+            LOG(ERROR) << "Failed to allocate buffer of size " << output_size << " only got "
+                       << actual_buffer_size << " bytes";
+            return false;
+        }
+        std::string input_buffer;
+        input_buffer.resize(stream_->Size());
+        size_t bytes_read = 0;
+        stream_->Read(input_buffer.data(), input_buffer.size(), &bytes_read);
+        if (bytes_read != input_buffer.size()) {
+            LOG(ERROR) << "Failed to read all input at once. Expected: " << input_buffer.size()
+                       << " actual: " << bytes_read;
+            return false;
+        }
+        const int bytes_decompressed =
+                LZ4_decompress_safe(input_buffer.data(), static_cast<char*>(output_buffer),
+                                    input_buffer.size(), output_size);
+        if (bytes_decompressed != output_size) {
+            LOG(ERROR) << "Failed to decompress LZ4 block, expected output size: " << output_size
+                       << ", actual: " << bytes_decompressed;
+            return false;
+        }
+        sink_->ReturnData(output_buffer, output_size);
+        return true;
+    }
+};
+
+std::unique_ptr<IDecompressor> IDecompressor::Lz4() {
+    return std::make_unique<Lz4Decompressor>();
+}
+
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/cow_decompress.h b/fs_mgr/libsnapshot/cow_decompress.h
index f485256..7f74eda 100644
--- a/fs_mgr/libsnapshot/cow_decompress.h
+++ b/fs_mgr/libsnapshot/cow_decompress.h
@@ -41,6 +41,7 @@
     static std::unique_ptr<IDecompressor> Uncompressed();
     static std::unique_ptr<IDecompressor> Gz();
     static std::unique_ptr<IDecompressor> Brotli();
+    static std::unique_ptr<IDecompressor> Lz4();
 
     // |output_bytes| is the expected total number of bytes to sink.
     virtual bool Decompress(size_t output_bytes) = 0;
diff --git a/fs_mgr/libsnapshot/cow_reader.cpp b/fs_mgr/libsnapshot/cow_reader.cpp
index 746feeb..653492c 100644
--- a/fs_mgr/libsnapshot/cow_reader.cpp
+++ b/fs_mgr/libsnapshot/cow_reader.cpp
@@ -775,6 +775,9 @@
         case kCowCompressBrotli:
             decompressor = IDecompressor::Brotli();
             break;
+        case kCowCompressLz4:
+            decompressor = IDecompressor::Lz4();
+            break;
         default:
             LOG(ERROR) << "Unknown compression type: " << op.compression;
             return false;
diff --git a/fs_mgr/libsnapshot/cow_writer.cpp b/fs_mgr/libsnapshot/cow_writer.cpp
index 5ce1d3b..7281fc2 100644
--- a/fs_mgr/libsnapshot/cow_writer.cpp
+++ b/fs_mgr/libsnapshot/cow_writer.cpp
@@ -24,8 +24,10 @@
 #include <android-base/logging.h>
 #include <android-base/unique_fd.h>
 #include <brotli/encode.h>
+#include <libsnapshot/cow_format.h>
 #include <libsnapshot/cow_reader.h>
 #include <libsnapshot/cow_writer.h>
+#include <lz4.h>
 #include <zlib.h>
 
 namespace android {
@@ -129,6 +131,8 @@
         compression_ = kCowCompressGz;
     } else if (options_.compression == "brotli") {
         compression_ = kCowCompressBrotli;
+    } else if (options_.compression == "lz4") {
+        compression_ = kCowCompressLz4;
     } else if (options_.compression == "none") {
         compression_ = kCowCompressNone;
     } else if (!options_.compression.empty()) {
@@ -403,35 +407,56 @@
 std::basic_string<uint8_t> CowWriter::Compress(const void* data, size_t length) {
     switch (compression_) {
         case kCowCompressGz: {
-            auto bound = compressBound(length);
-            auto buffer = std::make_unique<uint8_t[]>(bound);
+            const auto bound = compressBound(length);
+            std::basic_string<uint8_t> buffer(bound, '\0');
 
             uLongf dest_len = bound;
-            auto rv = compress2(buffer.get(), &dest_len, reinterpret_cast<const Bytef*>(data),
+            auto rv = compress2(buffer.data(), &dest_len, reinterpret_cast<const Bytef*>(data),
                                 length, Z_BEST_COMPRESSION);
             if (rv != Z_OK) {
                 LOG(ERROR) << "compress2 returned: " << rv;
                 return {};
             }
-            return std::basic_string<uint8_t>(buffer.get(), dest_len);
+            buffer.resize(dest_len);
+            return buffer;
         }
         case kCowCompressBrotli: {
-            auto bound = BrotliEncoderMaxCompressedSize(length);
+            const auto bound = BrotliEncoderMaxCompressedSize(length);
             if (!bound) {
                 LOG(ERROR) << "BrotliEncoderMaxCompressedSize returned 0";
                 return {};
             }
-            auto buffer = std::make_unique<uint8_t[]>(bound);
+            std::basic_string<uint8_t> buffer(bound, '\0');
 
             size_t encoded_size = bound;
             auto rv = BrotliEncoderCompress(
                     BROTLI_DEFAULT_QUALITY, BROTLI_DEFAULT_WINDOW, BROTLI_DEFAULT_MODE, length,
-                    reinterpret_cast<const uint8_t*>(data), &encoded_size, buffer.get());
+                    reinterpret_cast<const uint8_t*>(data), &encoded_size, buffer.data());
             if (!rv) {
                 LOG(ERROR) << "BrotliEncoderCompress failed";
                 return {};
             }
-            return std::basic_string<uint8_t>(buffer.get(), encoded_size);
+            buffer.resize(encoded_size);
+            return buffer;
+        }
+        case kCowCompressLz4: {
+            const auto bound = LZ4_compressBound(length);
+            if (!bound) {
+                LOG(ERROR) << "LZ4_compressBound returned 0";
+                return {};
+            }
+            std::basic_string<uint8_t> buffer(bound, '\0');
+
+            const auto compressed_size = LZ4_compress_default(
+                    static_cast<const char*>(data), reinterpret_cast<char*>(buffer.data()), length,
+                    buffer.size());
+            if (compressed_size <= 0) {
+                LOG(ERROR) << "LZ4_compress_default failed, input size: " << length
+                           << ", compression bound: " << bound << ", ret: " << compressed_size;
+                return {};
+            }
+            buffer.resize(compressed_size);
+            return buffer;
         }
         default:
             LOG(ERROR) << "unhandled compression type: " << compression_;
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
index 9f4ddbb..ba75a8d 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
@@ -154,9 +154,12 @@
 static constexpr uint8_t kCowSequenceOp = 7;
 static constexpr uint8_t kCowFooterOp = -1;
 
-static constexpr uint8_t kCowCompressNone = 0;
-static constexpr uint8_t kCowCompressGz = 1;
-static constexpr uint8_t kCowCompressBrotli = 2;
+enum CowCompressionAlgorithm : uint8_t {
+    kCowCompressNone = 0,
+    kCowCompressGz = 1,
+    kCowCompressBrotli = 2,
+    kCowCompressLz4 = 3
+};
 
 static constexpr uint8_t kCowReadAheadNotStarted = 0;
 static constexpr uint8_t kCowReadAheadInProgress = 1;
diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
index e17b5c6..e7a2f02 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_writer.h
@@ -155,7 +155,7 @@
     android::base::borrowed_fd fd_;
     CowHeader header_{};
     CowFooter footer_{};
-    int compression_ = 0;
+    CowCompressionAlgorithm compression_ = kCowCompressNone;
     uint64_t next_op_pos_ = 0;
     uint64_t next_data_pos_ = 0;
     uint32_t cluster_size_ = 0;
diff --git a/fs_mgr/libsnapshot/snapuserd/Android.bp b/fs_mgr/libsnapshot/snapuserd/Android.bp
index 57c599c..64e0b8a 100644
--- a/fs_mgr/libsnapshot/snapuserd/Android.bp
+++ b/fs_mgr/libsnapshot/snapuserd/Android.bp
@@ -87,6 +87,7 @@
         "liblog",
         "libsnapshot_cow",
         "libz",
+        "liblz4",
         "libext4_utils",
         "liburing",
     ],
@@ -145,6 +146,7 @@
     name: "cow_snapuserd_test",
     defaults: [
         "fs_mgr_defaults",
+        "libsnapshot_cow_defaults",
     ],
     srcs: [
         "dm-snapshot-merge/cow_snapuserd_test.cpp",
@@ -186,6 +188,7 @@
     name: "snapuserd_test",
     defaults: [
         "fs_mgr_defaults",
+        "libsnapshot_cow_defaults",
     ],
     srcs: [
         "user-space-merge/snapuserd_test.cpp",
diff --git a/init/Android.bp b/init/Android.bp
index b4bc170..2dd9683 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -164,6 +164,7 @@
         "libcgrouprc_format",
         "libfsverity_init",
         "liblmkd_utils",
+        "liblz4",
         "libmini_keyctl_static",
         "libmodprobe",
         "libprocinfo",
@@ -362,6 +363,7 @@
         "libext2_uuid",
         "libprotobuf-cpp-lite",
         "libsnapshot_cow",
+        "liblz4",
         "libsnapshot_init",
         "update_metadata-protos",
         "libprocinfo",