diff --git a/src/main/c/Makefile.am b/src/main/c/Makefile.am
index eead86d..ed561ac 100644
--- a/src/main/c/Makefile.am
+++ b/src/main/c/Makefile.am
@@ -1,4 +1,4 @@
-lib_LTLIBRARIES = libjpostal_parser.la libjpostal_expander.la
+lib_LTLIBRARIES = libjpostal_parser.la libjpostal_expander.la libjpostal_dedupe.la
 
 libjpostal_expander_la_SOURCES = jpostal_AddressExpander.c
 libjpostal_expander_la_CFLAGS = $(LIBPOSTAL_CFLAGS)
@@ -7,3 +7,7 @@ libjpostal_expander_la_LIBADD = $(LIBPOSTAL_LIBS)
 libjpostal_parser_la_SOURCES = jpostal_AddressParser.c
 libjpostal_parser_la_CFLAGS = $(LIBPOSTAL_CFLAGS)
 libjpostal_parser_la_LIBADD = $(LIBPOSTAL_LIBS)
+
+libjpostal_dedupe_la_SOURCES = jpostal_Dedupe.c
+libjpostal_dedupe_la_CFLAGS = $(LIBPOSTAL_CFLAGS)
+libjpostal_dedupe_la_LIBADD = $(LIBPOSTAL_LIBS)
diff --git a/src/main/c/jpostal_Dedupe.c b/src/main/c/jpostal_Dedupe.c
new file mode 100644
index 0000000..34175eb
--- /dev/null
+++ b/src/main/c/jpostal_Dedupe.c
@@ -0,0 +1,260 @@
+#include <jni.h>
+#include <libpostal/libpostal.h>
+
+JNIEXPORT void JNICALL Java_com_mapzen_jpostal_Dedupe_setup
+  (JNIEnv *env, jclass cls) {
+
+    if (!libpostal_setup() || !libpostal_setup_language_classifier()) {
+        jclass exceptionClass;
+        exceptionClass = (*env)->FindClass(env, "java/lang/RuntimeException");
+        if (exceptionClass == NULL) return;
+        (*env)->ThrowNew(env, exceptionClass, "Error loading libpostal dedupe modules\n");
+    }
+}
+
+JNIEXPORT void JNICALL Java_com_mapzen_jpostal_Dedupe_setupDataDir
+  (JNIEnv *env, jclass cls, jstring jDataDir) {
+    const char *datadir = (*env)->GetStringUTFChars(env, jDataDir, 0);
+    if (!libpostal_setup_datadir((char *)datadir) || !libpostal_setup_language_classifier_datadir((char *)datadir)) {
+        jclass exceptionClass;
+        exceptionClass = (*env)->FindClass(env, "java/lang/IllegalArgumentException");
+        if (exceptionClass == NULL) return;
+        (*env)->ThrowNew(env, exceptionClass, "Error loading libpostal dedupe modules\n");
+    }    
+}
+
+typedef libpostal_duplicate_status_t (*duplicate_function)(char *, char *, libpostal_duplicate_options_t);
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isDuplicate(JNIEnv *env, jobject thisObj,
+   jstring jValue1, jstring jValue2, jobject jOptions, duplicate_function func) {
+
+    const char *value1 = (*env)->GetStringUTFChars(env, jValue1, 0);
+
+    const char *value2 = (*env)->GetStringUTFChars(env, jValue2, 0);
+
+    libpostal_duplicate_options_t options = libpostal_get_default_duplicate_options();
+
+    jfieldID fid;
+
+    jclass optionsCls = (*env)->GetObjectClass(env, jOptions);
+
+    fid = (*env)->GetFieldID(env, optionsCls, "languages", "[Ljava/lang/String;");
+    if (fid == 0) {
+        return NULL;
+    }
+
+    jobject jLanguages = (*env)->GetObjectField(env, jOptions, fid);
+
+    size_t num_languages = 0;
+    char **languages = NULL;
+    int i;
+
+    if (jLanguages != NULL) {
+        jsize jNumLanguages = (*env)->GetArrayLength(env, jLanguages);
+
+        languages = malloc(sizeof(char *) * jNumLanguages);
+        jboolean is_copy = JNI_FALSE;
+
+        num_languages = (size_t)jNumLanguages;
+
+        for (i = 0; i < jNumLanguages; i++) {
+            jstring jLanguage = (*env)->GetObjectArrayElement(env, jLanguages, i);
+
+            const char *lang = (*env)->GetStringUTFChars(env, jLanguage, &is_copy);
+
+            char *language = strdup(lang);
+            languages[i] = language;
+
+            (*env)->ReleaseStringUTFChars(env, jLanguage, lang);
+        }
+        options.languages = languages;
+        options.num_languages = num_languages;
+    }
+
+    libpostal_duplicate_status_t response = func((char *)value1, (char *)value2, options);
+
+    (*env)->ReleaseStringUTFChars(env, jValue1, value1);
+
+    (*env)->ReleaseStringUTFChars(env, jValue2, value2);
+
+    return (jint) response;
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isNameDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jName1, jstring jName2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jName1, jName2, jOptions, libpostal_is_name_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isStreetDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jStreet1, jstring jStreet2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jStreet1, jStreet2, jOptions, libpostal_is_street_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isHouseNumberDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jHouseNumber1, jstring jHouseNumber2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jHouseNumber1, jHouseNumber2, jOptions, libpostal_is_house_number_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isPOBoxDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jPOBox1, jstring jPOBox2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jPOBox1, jPOBox2, jOptions, libpostal_is_po_box_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isUnitDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jUnit1, jstring jUnit2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jUnit1, jUnit2, jOptions, libpostal_is_unit_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isFloorDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jFloor1, jstring jFloor2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jFloor1, jFloor2, jOptions, libpostal_is_floor_duplicate);
+}
+
+JNIEXPORT jint JNICALL Java_com_mapzen_jpostal_Dedupe_isPostalCodeDuplicate
+  (JNIEnv *env, jobject thisObj, jstring jPostalCode1, jstring jPostalCode2, jobject jOptions) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicate(
+      env, thisObj, jPostalCode1, jPostalCode2, jOptions, libpostal_is_postal_code_duplicate);
+}
+
+JNIEXPORT void JNICALL Java_com_mapzen_jpostal_Dedupe_teardown
+  (JNIEnv *env, jclass cls) {
+    libpostal_teardown_language_classifier();
+}
+
+JNIEXPORT void JNICALL Java_com_mapzen_jpostal_DuplicateOptions_00024Builder_setDefaultOptions
+  (JNIEnv *env, jobject builder) {
+    jfieldID fid;
+    jclass cls = (*env)->GetObjectClass(env, builder);
+
+    libpostal_duplicate_options_t default_options = libpostal_get_default_duplicate_options();
+
+    fid = (*env)->GetFieldID(env, cls, "languages", "[Ljava/lang/String;");
+    if (fid == 0) {
+        return;
+    }
+
+    (*env)->SetObjectField(env, builder, fid, NULL);
+}
+
+jint throwError( JNIEnv *env, char *message )
+{
+    jclass exClass;
+    char *className = "java/lang/Error";
+
+    exClass = (*env)->FindClass( env, className);
+    if (exClass == NULL) {
+        return throwNoClassDefError( env, className );
+    }
+
+    return (*env)->ThrowNew( env, exClass, message );
+}
+
+typedef libpostal_fuzzy_duplicate_status_t (*fuzzy_duplicate_function)(size_t, char **, double *, size_t, char **, double *, libpostal_fuzzy_duplicate_options_t);
+
+JNIEXPORT jdouble JNICALL Java_com_mapzen_jpostal_Dedupe_isDuplicateFuzzy(
+    JNIEnv *env, jobject thisObj,
+    jobjectArray jTokens1, jdoubleArray jScores1,
+    jobjectArray jTokens2, jdoubleArray jScores2,
+    jobject jOptions, fuzzy_duplicate_function func
+) {
+    jboolean is_copy = JNI_FALSE;
+
+    // Get arguments
+    int num_tokens1 = (*env)->GetArrayLength(env, jTokens1);
+    int num_tokens2 = (*env)->GetArrayLength(env, jTokens2);
+
+    double *scores1 = (*env)->GetDoubleArrayElements(env, jScores1, &is_copy);
+    double *scores2 = (*env)->GetDoubleArrayElements(env, jScores2, &is_copy);
+
+    const char *tokens1[num_tokens1];
+    const char *tokens2[num_tokens2];
+
+    for (int i = 0; i < num_tokens1; i++) {
+        jstring jToken = (jstring) (*env)->GetObjectArrayElement(env, jTokens1, i);
+        const char *token = (*env)->GetStringUTFChars(env, jToken, &is_copy);
+        tokens1[i] = strdup(token);
+        (*env)->ReleaseStringUTFChars(env, jToken, token);
+    }
+
+    for (int i = 0; i < num_tokens2; i++) {
+        jstring jToken = (jstring) (*env)->GetObjectArrayElement(env, jTokens2, i);
+        const char *token = (*env)->GetStringUTFChars(env, jToken, &is_copy);
+        tokens2[i] = strdup(token);
+        (*env)->ReleaseStringUTFChars(env, jToken, token);
+    }
+
+    // Build Options Argument
+    libpostal_fuzzy_duplicate_options_t options = libpostal_get_default_fuzzy_duplicate_options();
+
+    jfieldID fid;
+    jclass optionsCls = (*env)->GetObjectClass(env, jOptions);
+
+    fid = (*env)->GetFieldID(env, optionsCls, "languages", "[Ljava/lang/String;");
+    if (fid == 0) {
+        throwError(env, "options.languages cannot be null");
+    }
+
+    jobject jLanguages = (*env)->GetObjectField(env, jOptions, fid);
+
+    size_t num_languages = 0;
+    char **languages = NULL;
+    int i;
+
+    if (jLanguages != NULL) {
+        jsize jNumLanguages = (*env)->GetArrayLength(env, jLanguages);
+
+        languages = malloc(sizeof(char *) * jNumLanguages);
+        jboolean is_copy = JNI_FALSE;
+
+        num_languages = (size_t)jNumLanguages;
+
+        for (i = 0; i < jNumLanguages; i++) {
+            jstring jLanguage = (*env)->GetObjectArrayElement(env, jLanguages, i);
+
+            const char *lang = (*env)->GetStringUTFChars(env, jLanguage, &is_copy);
+
+            char *language = strdup(lang);
+            languages[i] = language;
+
+            (*env)->ReleaseStringUTFChars(env, jLanguage, lang);
+        }
+        options.languages = languages;
+        options.num_languages = num_languages;
+    }
+
+    // Call the libpostal function
+    libpostal_fuzzy_duplicate_status_t status = func(num_tokens1, tokens1, scores1, num_tokens2, tokens2, scores2, options);
+
+    // Clean up
+    (*env)->ReleaseDoubleArrayElements(env, jScores1, scores1, 0);
+    (*env)->ReleaseDoubleArrayElements(env, jScores2, scores2, 0);
+
+    return (jdouble) status.similarity;
+}
+
+
+JNIEXPORT jdouble JNICALL Java_com_mapzen_jpostal_Dedupe_isNameDuplicateFuzzy(
+    JNIEnv *env, jobject thisObj,
+    jobjectArray jTokens1, jdoubleArray jScores1,
+    jobjectArray jTokens2, jdoubleArray jScores2,
+    jobject jOptions
+) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicateFuzzy(env, thisObj,
+        jTokens1, jScores1, jTokens2, jScores2, jOptions, libpostal_is_name_duplicate_fuzzy);
+}
+
+JNIEXPORT jdouble JNICALL Java_com_mapzen_jpostal_Dedupe_isStreetDuplicateFuzzy(
+    JNIEnv *env, jobject thisObj,
+    jobjectArray jTokens1, jdoubleArray jScores1,
+    jobjectArray jTokens2, jdoubleArray jScores2,
+    jobject jOptions
+) {
+    return Java_com_mapzen_jpostal_Dedupe_isDuplicateFuzzy(env, thisObj,
+        jTokens1, jScores1, jTokens2, jScores2, jOptions, libpostal_is_street_duplicate_fuzzy);
+}
diff --git a/src/main/java/com/mapzen/jpostal/Dedupe.java b/src/main/java/com/mapzen/jpostal/Dedupe.java
new file mode 100644
index 0000000..859d4c7
--- /dev/null
+++ b/src/main/java/com/mapzen/jpostal/Dedupe.java
@@ -0,0 +1,123 @@
+package com.mapzen.jpostal;
+
+public class Dedupe {
+    static {
+        System.loadLibrary("jpostal_dedupe"); // Load native library at runtime
+    }
+
+    private volatile static Dedupe instance = null;
+
+    public static Dedupe getInstanceDataDir(String dataDir) {
+        if (instance == null) {
+            synchronized(Dedupe.class) {
+                if (instance == null) {
+                    instance = new Dedupe(dataDir);
+                }
+            }
+        }
+        return instance;
+    }
+
+    public static Dedupe getInstance() {
+        return getInstanceDataDir(null);
+    }
+
+    static native synchronized void setup();
+    static native synchronized void setupDataDir(String dataDir);
+
+    private static native synchronized int isStreetDuplicate(String street1, String street2, DuplicateOptions options);
+    private static native synchronized int isNameDuplicate(String name1, String name2, DuplicateOptions options);
+    private static native synchronized int isHouseNumberDuplicate(String name1, String name2, DuplicateOptions options);
+    private static native synchronized int isPOBoxDuplicate(String poBox1, String poBox2, DuplicateOptions options);
+    private static native synchronized int isUnitDuplicate(String unit1, String unit2, DuplicateOptions options);
+    private static native synchronized int isFloorDuplicate(String floor1, String floor2, DuplicateOptions options);
+    private static native synchronized int isPostalCodeDuplicate(String postalCode1, String postalCode2, DuplicateOptions options);
+    private static native synchronized double isNameDuplicateFuzzy(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2, DuplicateOptions options);
+    private static native synchronized double isStreetDuplicateFuzzy(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2, DuplicateOptions options);
+
+    static native synchronized void teardown();
+
+    public DuplicateStatus isStreetDupe(String street1, String street2) {
+        return isStreetDupeWithOptions(street1, street2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isStreetDupeWithOptions(String street1, String street2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isStreetDuplicate(street1, street2, options));
+    }
+
+    public DuplicateStatus isNameDupe(String name1, String name2) {
+        return isNameDupeWithOptions(name1, name2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isNameDupeWithOptions(String name1, String name2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isNameDuplicate(name1, name2, options));
+    }
+
+    public DuplicateStatus isHouseNumberDupe(String houseNumber1, String houseNumber2) {
+        return isHouseNumberDupeWithOptions(houseNumber1, houseNumber2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isHouseNumberDupeWithOptions(String houseNumber1, String houseNumber2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isHouseNumberDuplicate(houseNumber1, houseNumber2, options));
+    }
+
+    public DuplicateStatus isPOBoxDupe(String poBox1, String poBox2) {
+        return isPOBoxDupeWithOptions(poBox1, poBox2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isPOBoxDupeWithOptions(String poBox1, String poBox2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isPOBoxDuplicate(poBox1, poBox2, options));
+    }
+
+    public DuplicateStatus isUnitDupe(String unit1, String unit2) {
+        return isUnitDupeWithOptions(unit1, unit2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isUnitDupeWithOptions(String unit1, String unit2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isUnitDuplicate(unit1, unit2, options));
+    }
+
+    public DuplicateStatus isFloorDupe(String floor1, String floor2) {
+        return isFloorDupeWithOptions(floor1, floor2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isFloorDupeWithOptions(String floor1, String floor2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isFloorDuplicate(floor1, floor2, options));
+    }
+
+    public DuplicateStatus isPostalCodeDupe(String postalCode1, String postalCode2) {
+        return isPostalCodeDupeWithOptions(postalCode1, postalCode2, new DuplicateOptions.Builder().build());
+    }
+
+    public DuplicateStatus isPostalCodeDupeWithOptions(String postalCode1, String postalCode2, DuplicateOptions options) {
+        return DuplicateStatus.fromInt(isPostalCodeDuplicate(postalCode1, postalCode2, options));
+    }
+
+    public double isNameDupeFuzzy(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2) {
+        return isNameDupeFuzzyWithOptions(tokens1, scores1, tokens2, scores2, new DuplicateOptions.Builder().build());
+    }
+
+    public double isNameDupeFuzzyWithOptions(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2, DuplicateOptions options) {
+        return isNameDuplicateFuzzy(tokens1, scores1, tokens2, scores2, options);
+    }
+
+    public double isStreetDupeFuzzy(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2) {
+        return isStreetDupeFuzzyWithOptions(tokens1, scores1, tokens2, scores2, new DuplicateOptions.Builder().build());
+    }
+
+    public double isStreetDupeFuzzyWithOptions(String[] tokens1, double[] scores1, String[] tokens2, double[] scores2, DuplicateOptions options) {
+        return isStreetDuplicateFuzzy(tokens1, scores1, tokens2, scores2, options);
+    }
+
+    protected Dedupe(String dataDir) {
+        if (dataDir == null) {
+            setup();
+        } else {
+            setupDataDir(dataDir);
+        }
+    } 
+
+    protected void finalize() {
+        teardown();
+    }
+}
diff --git a/src/main/java/com/mapzen/jpostal/DuplicateOptions.java b/src/main/java/com/mapzen/jpostal/DuplicateOptions.java
new file mode 100644
index 0000000..d9bb642
--- /dev/null
+++ b/src/main/java/com/mapzen/jpostal/DuplicateOptions.java
@@ -0,0 +1,44 @@
+package com.mapzen.jpostal;
+
+public class DuplicateOptions {
+
+    private String[] languages;
+
+    public String[] getLanguages() {
+        return languages;
+    }
+
+    public void setLanguages(String[] languages) {
+        this.languages = languages;
+    }
+
+    public static class Builder {
+        static {
+            System.loadLibrary("jpostal_dedupe"); // Load native library at runtime
+        }
+
+        private String[] languages;
+
+        private native synchronized void setDefaultOptions();
+
+        public Builder() {
+            super();
+            setDefaultOptions();
+        }
+
+        public Builder languages(String[] languages) {
+            this.languages = languages;
+            return this;
+        }
+
+        public DuplicateOptions build() {
+            return new DuplicateOptions(this);
+        }
+
+    }
+
+    private DuplicateOptions(Builder builder) {
+        languages = builder.languages;
+    }
+
+}
diff --git a/src/main/java/com/mapzen/jpostal/DuplicateStatus.java b/src/main/java/com/mapzen/jpostal/DuplicateStatus.java
new file mode 100644
index 0000000..03008c1
--- /dev/null
+++ b/src/main/java/com/mapzen/jpostal/DuplicateStatus.java
@@ -0,0 +1,25 @@
+package com.mapzen.jpostal;
+
+public enum DuplicateStatus {
+  LIBPOSTAL_NULL_DUPLICATE_STATUS(-1),
+  LIBPOSTAL_NON_DUPLICATE(0),
+  LIBPOSTAL_POSSIBLE_DUPLICATE_NEEDS_REVIEW(3),
+  LIBPOSTAL_LIKELY_DUPLICATE(6),
+  LIBPOSTAL_EXACT_DUPLICATE(9);
+
+  public final int intVal;
+
+  DuplicateStatus(int intVal) {
+    this.intVal = intVal;
+  }
+
+  public static DuplicateStatus fromInt(int i) {
+    for (DuplicateStatus s: values()) {
+      if (s.intVal == i) {
+        return s;
+      }
+    }
+
+    return null;
+  }
+}