diff --git a/changelog/@unreleased/pr-515.v2.yml b/changelog/@unreleased/pr-515.v2.yml
new file mode 100644
index 00000000..932667d5
--- /dev/null
+++ b/changelog/@unreleased/pr-515.v2.yml
@@ -0,0 +1,5 @@
+type: improvement
+improvement:
+  description: Migrate the Preconditions utility to its own `com.palantir.logsafe.preconditions` package
+  links:
+  - https://github.com/palantir/safe-logging/pull/515
diff --git a/preconditions-legacy/build.gradle b/preconditions-legacy/build.gradle
new file mode 100644
index 00000000..06ab8ded
--- /dev/null
+++ b/preconditions-legacy/build.gradle
@@ -0,0 +1,9 @@
+apply from: "${rootDir}/gradle/publish-jar.gradle"
+apply plugin: 'com.palantir.revapi'
+
+dependencies {
+    api project(':safe-logging')
+    api project(':safe-logging-exceptions')
+    compileOnly 'com.google.code.findbugs:jsr305'
+    api 'com.google.errorprone:error_prone_annotations'
+}
diff --git a/preconditions-legacy/src/main/java/com/palantir/logsafe/Preconditions.java b/preconditions-legacy/src/main/java/com/palantir/logsafe/Preconditions.java
new file mode 100755
index 00000000..b5f751ed
--- /dev/null
+++ b/preconditions-legacy/src/main/java/com/palantir/logsafe/Preconditions.java
@@ -0,0 +1,295 @@
+/*
+ * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
+ *
+ * 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.
+ */
+
+/*
+ * Copyright (C) 2007 The Guava Authors
+ *
+ * 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.
+ */
+package com.palantir.logsafe;
+
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
+import com.google.errorprone.annotations.CompileTimeConstant;
+import com.palantir.logsafe.exceptions.SafeIllegalArgumentException;
+import com.palantir.logsafe.exceptions.SafeIllegalStateException;
+import com.palantir.logsafe.exceptions.SafeNullPointerException;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * Deprecated in favor of {@code com.palantir.logsafe.preconditions.Preconditions} in a separate package.
+ * This class has been migrated to support the java platform module system, which does not allow packages
+ * to be reused from different jars.
+ *
+ * @deprecated Prefer Preconditions in the {@code com.palantir.logsafe.preconditions} package.
+ */
+@Deprecated
+public final class Preconditions {
+    private Preconditions() {}
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * @param expression a boolean expression
+     * @throws SafeIllegalArgumentException if {@code expression} is false
+     */
+    public static void checkArgument(boolean expression) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException();
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * @param expression a boolean expression
+     * @param message the loggable exception message
+     * @throws SafeIllegalArgumentException if {@code expression} is false
+     */
+    public static void checkArgument(boolean expression, @CompileTimeConstant String message) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException(message);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkArgument(boolean, String, Arg...)} for details.
+     */
+    public static void checkArgument(boolean expression, @CompileTimeConstant String message, Arg<?> arg) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException(message, arg);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkArgument(boolean, String, Arg...)} for details.
+     */
+    public static void checkArgument(
+            boolean expression, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException(message, arg1, arg2);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkArgument(boolean, String, Arg...)} for details.
+     */
+    public static void checkArgument(
+            boolean expression, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2, Arg<?> arg3) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException(message, arg1, arg2, arg3);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * @param expression a boolean expression
+     * @param message the loggable exception message
+     * @param args the arguments to include in the {@link SafeIllegalArgumentException}
+     * @throws SafeIllegalArgumentException if {@code expression} is false
+     */
+    public static void checkArgument(boolean expression, @CompileTimeConstant String message, Arg<?>... args) {
+        if (!expression) {
+            throw new SafeIllegalArgumentException(message, args);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters
+     * to the calling method.
+     *
+     * @param expression a boolean expression
+     * @throws SafeIllegalStateException if {@code expression} is false
+     */
+    public static void checkState(boolean expression) {
+        if (!expression) {
+            throw new SafeIllegalStateException();
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters
+     * to the calling method.
+     *
+     * @param expression a boolean expression
+     * @param message the loggable exception message
+     * @throws SafeIllegalStateException if {@code expression} is false
+     */
+    public static void checkState(boolean expression, @CompileTimeConstant String message) {
+        if (!expression) {
+            throw new SafeIllegalStateException(message);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkState(boolean, String, Arg...)} for details.
+     */
+    public static void checkState(boolean expression, @CompileTimeConstant String message, Arg<?> arg) {
+        if (!expression) {
+            throw new SafeIllegalStateException(message, arg);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkState(boolean, String, Arg...)} for details.
+     */
+    public static void checkState(boolean expression, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2) {
+        if (!expression) {
+            throw new SafeIllegalStateException(message, arg1, arg2);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving one or more parameters to the calling method.
+     *
+     * <p>See {@link #checkState(boolean, String, Arg...)} for details.
+     */
+    public static void checkState(
+            boolean expression, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2, Arg<?> arg3) {
+        if (!expression) {
+            throw new SafeIllegalStateException(message, arg1, arg2, arg3);
+        }
+    }
+
+    /**
+     * Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters
+     * to the calling method.
+     *
+     * @param expression a boolean expression
+     * @param message the loggable exception message
+     * @param args the arguments to include in the {@link SafeIllegalStateException}
+     * @throws SafeIllegalStateException if {@code expression} is false
+     */
+    public static void checkState(boolean expression, @CompileTimeConstant String message, Arg<?>... args) {
+        if (!expression) {
+            throw new SafeIllegalStateException(message, args);
+        }
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * @param reference an String reference
+     * @return the non-null reference that was validated
+     * @throws SafeNullPointerException if {@code reference} is null
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(@Nullable T reference) {
+        if (reference == null) {
+            throw new SafeNullPointerException();
+        }
+        return reference;
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * @param reference an String reference
+     * @param message the loggable exception message
+     * @return the non-null reference that was validated
+     * @throws SafeNullPointerException if {@code reference} is null
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(@Nullable T reference, @CompileTimeConstant String message) {
+        if (reference == null) {
+            throw new SafeNullPointerException(message);
+        }
+        return reference;
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * <p>See {@link #checkNotNull(Object, String, Arg...)} for details.
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(@Nullable T reference, @CompileTimeConstant String message, Arg<?> arg) {
+        if (reference == null) {
+            throw new SafeNullPointerException(message, arg);
+        }
+        return reference;
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * <p>See {@link #checkNotNull(Object, String, Arg...)} for details.
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(
+            @Nullable T reference, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2) {
+        if (reference == null) {
+            throw new SafeNullPointerException(message, arg1, arg2);
+        }
+        return reference;
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * <p>See {@link #checkNotNull(Object, String, Arg...)} for details.
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(
+            @Nullable T reference, @CompileTimeConstant String message, Arg<?> arg1, Arg<?> arg2, Arg<?> arg3) {
+        if (reference == null) {
+            throw new SafeNullPointerException(message, arg1, arg2, arg3);
+        }
+        return reference;
+    }
+
+    /**
+     * Ensures that an Object reference passed as a parameter to the calling method is not null.
+     *
+     * @param reference an String reference
+     * @param message the loggable exception message
+     * @param args the arguments to include in the {@link SafeNullPointerException}
+     * @return the non-null reference that was validated
+     * @throws SafeNullPointerException if {@code reference} is null
+     */
+    @Nonnull
+    @CanIgnoreReturnValue
+    public static <T> T checkNotNull(@Nullable T reference, @CompileTimeConstant String message, Arg<?>... args) {
+        if (reference == null) {
+            throw new SafeNullPointerException(message, args);
+        }
+        return reference;
+    }
+}
diff --git a/preconditions/build.gradle b/preconditions/build.gradle
index 0f4aeb1d..52a8bcb7 100644
--- a/preconditions/build.gradle
+++ b/preconditions/build.gradle
@@ -3,9 +3,8 @@ apply plugin: 'com.palantir.revapi'
 
 dependencies {
     api project(':safe-logging')
+    api project(':safe-logging-exceptions')
+    api project(':preconditions-legacy')
     compileOnly 'com.google.code.findbugs:jsr305'
     api 'com.google.errorprone:error_prone_annotations'
-
-    testImplementation 'junit:junit'
-    testImplementation 'org.assertj:assertj-core'
 }
diff --git a/preconditions/src/main/java/com/palantir/logsafe/Preconditions.java b/preconditions/src/main/java/com/palantir/logsafe/preconditions/Preconditions.java
similarity index 99%
rename from preconditions/src/main/java/com/palantir/logsafe/Preconditions.java
rename to preconditions/src/main/java/com/palantir/logsafe/preconditions/Preconditions.java
index 0c6dd290..73c6eede 100755
--- a/preconditions/src/main/java/com/palantir/logsafe/Preconditions.java
+++ b/preconditions/src/main/java/com/palantir/logsafe/preconditions/Preconditions.java
@@ -27,10 +27,11 @@
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
-package com.palantir.logsafe;
+package com.palantir.logsafe.preconditions;
 
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import com.google.errorprone.annotations.CompileTimeConstant;
+import com.palantir.logsafe.Arg;
 import com.palantir.logsafe.exceptions.SafeIllegalArgumentException;
 import com.palantir.logsafe.exceptions.SafeIllegalStateException;
 import com.palantir.logsafe.exceptions.SafeNullPointerException;
diff --git a/safe-logging-exceptions/build.gradle b/safe-logging-exceptions/build.gradle
new file mode 100644
index 00000000..0f4aeb1d
--- /dev/null
+++ b/safe-logging-exceptions/build.gradle
@@ -0,0 +1,11 @@
+apply from: "${rootDir}/gradle/publish-jar.gradle"
+apply plugin: 'com.palantir.revapi'
+
+dependencies {
+    api project(':safe-logging')
+    compileOnly 'com.google.code.findbugs:jsr305'
+    api 'com.google.errorprone:error_prone_annotations'
+
+    testImplementation 'junit:junit'
+    testImplementation 'org.assertj:assertj-core'
+}
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeExceptions.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeExceptions.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeExceptions.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeExceptions.java
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalArgumentException.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalArgumentException.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalArgumentException.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalArgumentException.java
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalStateException.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalStateException.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalStateException.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIllegalStateException.java
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIoException.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIoException.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeIoException.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeIoException.java
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeNullPointerException.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeNullPointerException.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeNullPointerException.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeNullPointerException.java
diff --git a/preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeRuntimeException.java b/safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeRuntimeException.java
similarity index 100%
rename from preconditions/src/main/java/com/palantir/logsafe/exceptions/SafeRuntimeException.java
rename to safe-logging-exceptions/src/main/java/com/palantir/logsafe/exceptions/SafeRuntimeException.java
diff --git a/preconditions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionTest.java b/safe-logging-exceptions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionTest.java
similarity index 100%
rename from preconditions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionTest.java
rename to safe-logging-exceptions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionTest.java
diff --git a/preconditions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionsTest.java b/safe-logging-exceptions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionsTest.java
similarity index 100%
rename from preconditions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionsTest.java
rename to safe-logging-exceptions/src/test/java/com/palantir/logsafe/exceptions/SafeExceptionsTest.java
diff --git a/settings.gradle b/settings.gradle
index 37098e47..7c23b74f 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,7 +1,9 @@
 rootProject.name = 'safe-logging-root'
 
 include 'safe-logging'
+include 'safe-logging-exceptions'
 include 'safe-logging-refactorings'
 include 'preconditions'
+include 'preconditions-legacy'
 include 'preconditions-assertj'