diff --git a/buildscripts/sync-protos.sh b/buildscripts/sync-protos.sh
new file mode 100755
index 0000000000..ad3c8d597e
--- /dev/null
+++ b/buildscripts/sync-protos.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname "$0")/.."
+
+tmpdir="$(mktemp -d)"
+curl -Ls https://github.com/grpc/grpc-proto/archive/master.tar.gz | tar xz -C "$tmpdir"
+base="$tmpdir/grpc-proto-master"
+
+# Copy protos in 'src/main/proto' from grpc-proto for these projects
+for project in alts grpclb services; do
+  while read -r proto; do
+    [ -f "$base/$proto" ] && cp "$base/$proto" "$project/src/main/proto/$proto"
+    echo "$proto"
+  done < <(cd "$project/src/main/proto" && find . -name "*.proto")
+done | sort > "$tmpdir/grpc-java.lst"
+
+(cd "$base" && find . -name "*.proto") | sort > "$tmpdir/base.lst"
+echo "Files synced:"
+comm -12 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+echo
+echo "Files in grpc-proto not synced:"
+comm -13 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+echo
+echo "Files in grpc-java not synced:"
+comm -23 "$tmpdir/grpc-java.lst" "$tmpdir/base.lst"
+
+rm -r "$tmpdir"
diff --git a/services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java b/services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java
index 78f192c3cb..80f45a69cd 100644
--- a/services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java
+++ b/services/src/generated/main/grpc/io/grpc/reflection/v1alpha/ServerReflectionGrpc.java
@@ -19,7 +19,7 @@ import static io.grpc.stub.ServerCalls.asyncUnimplementedUnaryCall;
  */
 @javax.annotation.Generated(
     value = "by gRPC proto compiler",
-    comments = "Source: io/grpc/reflection/v1alpha/reflection.proto")
+    comments = "Source: grpc/reflection/v1alpha/reflection.proto")
 public final class ServerReflectionGrpc {
 
   private ServerReflectionGrpc() {}
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponse.java
index 5bfe39296d..16ecd36b67 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponseOrBuilder.java
index f531686515..f31a80ebf7 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ErrorResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponse.java
index 8d982e5554..fd3db392a0 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponseOrBuilder.java
index a9795793a3..be7a144641 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionNumberResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequest.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequest.java
index 4f49b8e6ea..22f7cb230b 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequest.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequest.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequestOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequestOrBuilder.java
index d49e3d9cac..f6c3ede557 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequestOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ExtensionRequestOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponse.java
index ea66a2b973..0f1564e547 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponseOrBuilder.java
index 82a69d71d1..d079ab2953 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/FileDescriptorResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponse.java
index 0692e88eb1..d2d5bb96dc 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponseOrBuilder.java
index 734ec961ce..d03496988d 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ListServiceResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionProto.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionProto.java
index a02fa6d0e8..073e4847a2 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionProto.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionProto.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
@@ -63,42 +63,41 @@ package io.grpc.reflection.v1alpha;
       descriptor;
   static {
     java.lang.String[] descriptorData = {
-      "\n+io/grpc/reflection/v1alpha/reflection." +
-      "proto\022\027grpc.reflection.v1alpha\"\212\002\n\027Serve" +
-      "rReflectionRequest\022\014\n\004host\030\001 \001(\t\022\032\n\020file" +
-      "_by_filename\030\003 \001(\tH\000\022 \n\026file_containing_" +
-      "symbol\030\004 \001(\tH\000\022N\n\031file_containing_extens" +
-      "ion\030\005 \001(\0132).grpc.reflection.v1alpha.Exte" +
-      "nsionRequestH\000\022\'\n\035all_extension_numbers_" +
-      "of_type\030\006 \001(\tH\000\022\027\n\rlist_services\030\007 \001(\tH\000" +
-      "B\021\n\017message_request\"E\n\020ExtensionRequest\022" +
-      "\027\n\017containing_type\030\001 \001(\t\022\030\n\020extension_nu" +
-      "mber\030\002 \001(\005\"\321\003\n\030ServerReflectionResponse\022" +
-      "\022\n\nvalid_host\030\001 \001(\t\022J\n\020original_request\030" +
-      "\002 \001(\01320.grpc.reflection.v1alpha.ServerRe" +
-      "flectionRequest\022S\n\030file_descriptor_respo" +
-      "nse\030\004 \001(\0132/.grpc.reflection.v1alpha.File" +
-      "DescriptorResponseH\000\022Z\n\036all_extension_nu" +
-      "mbers_response\030\005 \001(\01320.grpc.reflection.v" +
-      "1alpha.ExtensionNumberResponseH\000\022N\n\026list" +
-      "_services_response\030\006 \001(\0132,.grpc.reflecti" +
-      "on.v1alpha.ListServiceResponseH\000\022@\n\016erro" +
-      "r_response\030\007 \001(\0132&.grpc.reflection.v1alp" +
-      "ha.ErrorResponseH\000B\022\n\020message_response\"7" +
-      "\n\026FileDescriptorResponse\022\035\n\025file_descrip" +
-      "tor_proto\030\001 \003(\014\"K\n\027ExtensionNumberRespon" +
-      "se\022\026\n\016base_type_name\030\001 \001(\t\022\030\n\020extension_" +
-      "number\030\002 \003(\005\"P\n\023ListServiceResponse\0229\n\007s" +
-      "ervice\030\001 \003(\0132(.grpc.reflection.v1alpha.S" +
-      "erviceResponse\"\037\n\017ServiceResponse\022\014\n\004nam" +
-      "e\030\001 \001(\t\":\n\rErrorResponse\022\022\n\nerror_code\030\001" +
-      " \001(\005\022\025\n\rerror_message\030\002 \001(\t2\223\001\n\020ServerRe" +
-      "flection\022\177\n\024ServerReflectionInfo\0220.grpc." +
-      "reflection.v1alpha.ServerReflectionReque" +
-      "st\0321.grpc.reflection.v1alpha.ServerRefle" +
-      "ctionResponse(\0010\001B8\n\032io.grpc.reflection." +
-      "v1alphaB\025ServerReflectionProtoP\001\270\001\001b\006pro" +
-      "to3"
+      "\n(grpc/reflection/v1alpha/reflection.pro" +
+      "to\022\027grpc.reflection.v1alpha\"\212\002\n\027ServerRe" +
+      "flectionRequest\022\014\n\004host\030\001 \001(\t\022\032\n\020file_by" +
+      "_filename\030\003 \001(\tH\000\022 \n\026file_containing_sym" +
+      "bol\030\004 \001(\tH\000\022N\n\031file_containing_extension" +
+      "\030\005 \001(\0132).grpc.reflection.v1alpha.Extensi" +
+      "onRequestH\000\022\'\n\035all_extension_numbers_of_" +
+      "type\030\006 \001(\tH\000\022\027\n\rlist_services\030\007 \001(\tH\000B\021\n" +
+      "\017message_request\"E\n\020ExtensionRequest\022\027\n\017" +
+      "containing_type\030\001 \001(\t\022\030\n\020extension_numbe" +
+      "r\030\002 \001(\005\"\321\003\n\030ServerReflectionResponse\022\022\n\n" +
+      "valid_host\030\001 \001(\t\022J\n\020original_request\030\002 \001" +
+      "(\01320.grpc.reflection.v1alpha.ServerRefle" +
+      "ctionRequest\022S\n\030file_descriptor_response" +
+      "\030\004 \001(\0132/.grpc.reflection.v1alpha.FileDes" +
+      "criptorResponseH\000\022Z\n\036all_extension_numbe" +
+      "rs_response\030\005 \001(\01320.grpc.reflection.v1al" +
+      "pha.ExtensionNumberResponseH\000\022N\n\026list_se" +
+      "rvices_response\030\006 \001(\0132,.grpc.reflection." +
+      "v1alpha.ListServiceResponseH\000\022@\n\016error_r" +
+      "esponse\030\007 \001(\0132&.grpc.reflection.v1alpha." +
+      "ErrorResponseH\000B\022\n\020message_response\"7\n\026F" +
+      "ileDescriptorResponse\022\035\n\025file_descriptor" +
+      "_proto\030\001 \003(\014\"K\n\027ExtensionNumberResponse\022" +
+      "\026\n\016base_type_name\030\001 \001(\t\022\030\n\020extension_num" +
+      "ber\030\002 \003(\005\"P\n\023ListServiceResponse\0229\n\007serv" +
+      "ice\030\001 \003(\0132(.grpc.reflection.v1alpha.Serv" +
+      "iceResponse\"\037\n\017ServiceResponse\022\014\n\004name\030\001" +
+      " \001(\t\":\n\rErrorResponse\022\022\n\nerror_code\030\001 \001(" +
+      "\005\022\025\n\rerror_message\030\002 \001(\t2\223\001\n\020ServerRefle" +
+      "ction\022\177\n\024ServerReflectionInfo\0220.grpc.ref" +
+      "lection.v1alpha.ServerReflectionRequest\032" +
+      "1.grpc.reflection.v1alpha.ServerReflecti" +
+      "onResponse(\0010\001B8\n\032io.grpc.reflection.v1a" +
+      "lphaB\025ServerReflectionProtoP\001\270\001\001b\006proto3"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
         new com.google.protobuf.Descriptors.FileDescriptor.    InternalDescriptorAssigner() {
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequest.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequest.java
index e03a5422ad..b00f96717a 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequest.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequest.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequestOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequestOrBuilder.java
index efd0538004..e93766a7bd 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequestOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionRequestOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponse.java
index 09254b1fdc..cd4db2f237 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponseOrBuilder.java
index 0a24d91382..2473baf9a8 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServerReflectionResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponse.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponse.java
index 031decc240..c95b526e87 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponse.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponse.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponseOrBuilder.java b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponseOrBuilder.java
index ed234c72e5..12bac5b68d 100644
--- a/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponseOrBuilder.java
+++ b/services/src/generated/main/java/io/grpc/reflection/v1alpha/ServiceResponseOrBuilder.java
@@ -1,5 +1,5 @@
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
-// source: io/grpc/reflection/v1alpha/reflection.proto
+// source: grpc/reflection/v1alpha/reflection.proto
 
 package io.grpc.reflection.v1alpha;
 
diff --git a/services/src/main/proto/io/grpc/reflection/v1alpha/reflection.proto b/services/src/main/proto/grpc/reflection/v1alpha/reflection.proto
similarity index 100%
rename from services/src/main/proto/io/grpc/reflection/v1alpha/reflection.proto
rename to services/src/main/proto/grpc/reflection/v1alpha/reflection.proto