diff --git a/packages/server/modules/cli/commands/download/commit.ts b/packages/server/modules/cli/commands/download/commit.ts
index b4970d665..2f19023a4 100644
--- a/packages/server/modules/cli/commands/download/commit.ts
+++ b/packages/server/modules/cli/commands/download/commit.ts
@@ -12,7 +12,7 @@ import { createCommitByBranchId } from '@/modules/core/services/commit/managemen
 import { createObject } from '@/modules/core/services/objects'
 import { getObject, getStreamObjects } from '@/modules/core/repositories/objects'
 import {
-  createCommentReplyAndNotify,
+  createCommentReplyAndNotifyFactory,
   createCommentThreadAndNotifyFactory
 } from '@/modules/comments/services/management'
 import {
@@ -24,13 +24,18 @@ import {
   getSpecificBranchCommits
 } from '@/modules/core/repositories/commits'
 import {
+  getCommentFactory,
   insertCommentLinksFactory,
   insertCommentsFactory,
+  markCommentUpdatedFactory,
   markCommentViewedFactory
 } from '@/modules/comments/repositories/comments'
 import { db } from '@/db/knex'
 import { CommentsEmitter } from '@/modules/comments/events/emitter'
-import { addCommentCreatedActivity } from '@/modules/activitystream/services/commentActivity'
+import {
+  addCommentCreatedActivity,
+  addReplyAddedActivity
+} from '@/modules/activitystream/services/commentActivity'
 import { validateInputAttachmentsFactory } from '@/modules/comments/services/commentTextService'
 import { getBlobsFactory } from '@/modules/blobstorage/repositories'
 
@@ -98,6 +103,16 @@ const command: CommandModule<
       addCommentCreatedActivity
     })
 
+    const createCommentReplyAndNotify = createCommentReplyAndNotifyFactory({
+      getComment: getCommentFactory({ db }),
+      validateInputAttachments,
+      insertComments,
+      insertCommentLinks,
+      markCommentUpdated: markCommentUpdatedFactory({ db }),
+      commentsEventsEmit: CommentsEmitter.emit,
+      addReplyAddedActivity
+    })
+
     const downloadCommit = downloadCommitFactory({
       getStream,
       getStreamBranchByName,
diff --git a/packages/server/modules/cli/commands/download/project.ts b/packages/server/modules/cli/commands/download/project.ts
index ec13adc65..29154d06e 100644
--- a/packages/server/modules/cli/commands/download/project.ts
+++ b/packages/server/modules/cli/commands/download/project.ts
@@ -13,13 +13,16 @@ import { createCommitByBranchId } from '@/modules/core/services/commit/managemen
 import { createObject } from '@/modules/core/services/objects'
 import { getObject, getStreamObjects } from '@/modules/core/repositories/objects'
 import {
-  createCommentReplyAndNotify,
+  createCommentReplyAndNotifyFactory,
   createCommentThreadAndNotifyFactory
 } from '@/modules/comments/services/management'
 import { createStreamReturnRecord } from '@/modules/core/services/streams/management'
 import { createBranchAndNotify } from '@/modules/core/services/branch/management'
 import { CommentsEmitter } from '@/modules/comments/events/emitter'
-import { addCommentCreatedActivity } from '@/modules/activitystream/services/commentActivity'
+import {
+  addCommentCreatedActivity,
+  addReplyAddedActivity
+} from '@/modules/activitystream/services/commentActivity'
 import {
   getAllBranchCommits,
   getSpecificBranchCommits
@@ -30,8 +33,10 @@ import {
 } from '@/modules/core/services/commit/viewerResources'
 import { db } from '@/db/knex'
 import {
+  getCommentFactory,
   insertCommentLinksFactory,
   insertCommentsFactory,
+  markCommentUpdatedFactory,
   markCommentViewedFactory
 } from '@/modules/comments/repositories/comments'
 import { getBlobsFactory } from '@/modules/blobstorage/repositories'
@@ -93,6 +98,15 @@ const command: CommandModule<
       commentsEventsEmit: CommentsEmitter.emit,
       addCommentCreatedActivity
     })
+    const createCommentReplyAndNotify = createCommentReplyAndNotifyFactory({
+      getComment: getCommentFactory({ db }),
+      validateInputAttachments,
+      insertComments,
+      insertCommentLinks,
+      markCommentUpdated: markCommentUpdatedFactory({ db }),
+      commentsEventsEmit: CommentsEmitter.emit,
+      addReplyAddedActivity
+    })
 
     const downloadProject = downloadProjectFactory({
       downloadCommit: downloadCommitFactory({
diff --git a/packages/server/modules/comments/domain/operations.ts b/packages/server/modules/comments/domain/operations.ts
index a0d4b6b67..81df957c0 100644
--- a/packages/server/modules/comments/domain/operations.ts
+++ b/packages/server/modules/comments/domain/operations.ts
@@ -7,6 +7,7 @@ import {
 import { CommentLinkRecord, CommentRecord } from '@/modules/comments/helpers/types'
 import {
   CreateCommentInput,
+  CreateCommentReplyInput,
   ViewerUpdateTrackingTarget
 } from '@/modules/core/graph/generated/graphql'
 import { SmartTextEditorValueSchema } from '@/modules/core/services/richTextEditorService'
@@ -106,3 +107,8 @@ export type CreateCommentThreadAndNotify = (
   input: CreateCommentInput,
   userId: string
 ) => Promise<CommentRecord>
+
+export type CreateCommentReplyAndNotify = (
+  input: CreateCommentReplyInput,
+  userId: string
+) => Promise<CommentRecord>
diff --git a/packages/server/modules/comments/graph/resolvers/comments.ts b/packages/server/modules/comments/graph/resolvers/comments.ts
index 66848e3d0..699dfdc77 100644
--- a/packages/server/modules/comments/graph/resolvers/comments.ts
+++ b/packages/server/modules/comments/graph/resolvers/comments.ts
@@ -57,12 +57,12 @@ import {
   getViewerResourceGroupsFactory
 } from '@/modules/core/services/commit/viewerResources'
 import {
-  createCommentReplyAndNotify,
   editCommentAndNotify,
   archiveCommentAndNotify,
   authorizeProjectCommentsAccessFactory,
   authorizeCommentAccessFactory,
-  createCommentThreadAndNotifyFactory
+  createCommentThreadAndNotifyFactory,
+  createCommentReplyAndNotifyFactory
 } from '@/modules/comments/services/management'
 import {
   isLegacyData,
@@ -184,6 +184,15 @@ const createCommentThreadAndNotify = createCommentThreadAndNotifyFactory({
   commentsEventsEmit: CommentsEmitter.emit,
   addCommentCreatedActivity
 })
+const createCommentReplyAndNotify = createCommentReplyAndNotifyFactory({
+  getComment,
+  validateInputAttachments,
+  insertComments,
+  insertCommentLinks,
+  markCommentUpdated: markCommentUpdatedFactory({ db }),
+  commentsEventsEmit: CommentsEmitter.emit,
+  addReplyAddedActivity
+})
 
 const getStreamComment = async (
   { streamId, commentId }: { streamId: string; commentId: string },
diff --git a/packages/server/modules/comments/services/management.ts b/packages/server/modules/comments/services/management.ts
index 72522dfcd..e95dbca97 100644
--- a/packages/server/modules/comments/services/management.ts
+++ b/packages/server/modules/comments/services/management.ts
@@ -5,9 +5,6 @@ import { getStream } from '@/modules/core/repositories/streams'
 import { StreamInvalidAccessError } from '@/modules/core/errors/stream'
 import {
   getCommentFactory,
-  insertComment,
-  insertCommentLinksFactory,
-  markCommentUpdatedFactory,
   updateCommentFactory
 } from '@/modules/comments/repositories/comments'
 import {
@@ -44,12 +41,14 @@ import { adminOverrideEnabled } from '@/modules/shared/helpers/envHelper'
 import { getBlobsFactory } from '@/modules/blobstorage/repositories'
 import { db } from '@/db/knex'
 import {
+  CreateCommentReplyAndNotify,
   CreateCommentThreadAndNotify,
   GetComment,
   GetViewerResourceItemsUngrouped,
   InsertCommentLinks,
   InsertCommentPayload,
   InsertComments,
+  MarkCommentUpdated,
   MarkCommentViewed,
   ValidateInputAttachments
 } from '@/modules/comments/domain/operations'
@@ -205,61 +204,65 @@ export const createCommentThreadAndNotifyFactory =
     return comment
   }
 
-export async function createCommentReplyAndNotify(
-  input: CreateCommentReplyInput,
-  userId: string
-) {
-  const thread = await getCommentFactory({ db })({ id: input.threadId, userId })
-  if (!thread) {
-    throw new CommentCreateError('Reply creation failed due to nonexistant thread')
-  }
-  await validateInputAttachmentsFactory({ getBlobs: getBlobsFactory({ db }) })(
-    thread.streamId,
-    input.content.blobIds || []
-  )
+export const createCommentReplyAndNotifyFactory =
+  (deps: {
+    getComment: GetComment
+    validateInputAttachments: ValidateInputAttachments
+    insertComments: InsertComments
+    insertCommentLinks: InsertCommentLinks
+    markCommentUpdated: MarkCommentUpdated
+    commentsEventsEmit: CommentsEventsEmit
+    addReplyAddedActivity: typeof addReplyAddedActivity
+  }): CreateCommentReplyAndNotify =>
+  async (input: CreateCommentReplyInput, userId: string) => {
+    const thread = await deps.getComment({ id: input.threadId, userId })
+    if (!thread) {
+      throw new CommentCreateError('Reply creation failed due to nonexistant thread')
+    }
+    await deps.validateInputAttachments(thread.streamId, input.content.blobIds || [])
 
-  const commentPayload: InsertCommentPayload = {
-    streamId: thread.streamId,
-    authorId: userId,
-    text: buildCommentTextFromInput({
-      doc: input.content.doc,
-      blobIds: input.content.blobIds || undefined
-    }),
-    parentComment: thread.id,
-    data: null
-  }
-
-  let reply: CommentRecord
-  try {
-    reply = await knex.transaction(async (trx) => {
-      const reply = await insertComment(commentPayload, { trx })
-      const links: CommentLinkRecord[] = [
-        { resourceType: 'comment', resourceId: thread.id, commentId: reply.id }
-      ]
-      await insertCommentLinksFactory({ db })(links, { trx })
-
-      return reply
-    })
-  } catch (e) {
-    throw new CommentCreateError('Reply creation failed', { cause: ensureError(e) })
-  }
-
-  // Mark parent comment updated and emit events
-  await Promise.all([
-    markCommentUpdatedFactory({ db })(thread.id),
-    CommentsEmitter.emit(CommentsEvents.Created, {
-      comment: reply
-    }),
-    addReplyAddedActivity({
+    const commentPayload: InsertCommentPayload = {
       streamId: thread.streamId,
-      input,
-      reply,
-      userId
-    })
-  ])
+      authorId: userId,
+      text: buildCommentTextFromInput({
+        doc: input.content.doc,
+        blobIds: input.content.blobIds || undefined
+      }),
+      parentComment: thread.id,
+      data: null
+    }
 
-  return reply
-}
+    let reply: CommentRecord
+    try {
+      reply = await knex.transaction(async (trx) => {
+        const [reply] = await deps.insertComments([commentPayload], { trx })
+        const links: CommentLinkRecord[] = [
+          { resourceType: 'comment', resourceId: thread.id, commentId: reply.id }
+        ]
+        await deps.insertCommentLinks(links, { trx })
+
+        return reply
+      })
+    } catch (e) {
+      throw new CommentCreateError('Reply creation failed', { cause: ensureError(e) })
+    }
+
+    // Mark parent comment updated and emit events
+    await Promise.all([
+      deps.markCommentUpdated(thread.id),
+      deps.commentsEventsEmit(CommentsEvents.Created, {
+        comment: reply
+      }),
+      deps.addReplyAddedActivity({
+        streamId: thread.streamId,
+        input,
+        reply,
+        userId
+      })
+    ])
+
+    return reply
+  }
 
 export async function editCommentAndNotify(input: EditCommentInput, userId: string) {
   const comment = await getCommentFactory({ db })({ id: input.commentId, userId })
diff --git a/packages/server/modules/cross-server-sync/index.ts b/packages/server/modules/cross-server-sync/index.ts
index fbffe80b6..0dab3bd40 100644
--- a/packages/server/modules/cross-server-sync/index.ts
+++ b/packages/server/modules/cross-server-sync/index.ts
@@ -1,16 +1,21 @@
 import { db } from '@/db/knex'
 import { moduleLogger, crossServerSyncLogger } from '@/logging/logging'
-import { addCommentCreatedActivity } from '@/modules/activitystream/services/commentActivity'
+import {
+  addCommentCreatedActivity,
+  addReplyAddedActivity
+} from '@/modules/activitystream/services/commentActivity'
 import { getBlobsFactory } from '@/modules/blobstorage/repositories'
 import { CommentsEmitter } from '@/modules/comments/events/emitter'
 import {
+  getCommentFactory,
   insertCommentLinksFactory,
   insertCommentsFactory,
+  markCommentUpdatedFactory,
   markCommentViewedFactory
 } from '@/modules/comments/repositories/comments'
 import { validateInputAttachmentsFactory } from '@/modules/comments/services/commentTextService'
 import {
-  createCommentReplyAndNotify,
+  createCommentReplyAndNotifyFactory,
   createCommentThreadAndNotifyFactory
 } from '@/modules/comments/services/management'
 import {
@@ -73,6 +78,16 @@ const crossServerSyncModule: SpeckleModule = {
       commentsEventsEmit: CommentsEmitter.emit,
       addCommentCreatedActivity
     })
+    const createCommentReplyAndNotify = createCommentReplyAndNotifyFactory({
+      getComment: getCommentFactory({ db }),
+      validateInputAttachments,
+      insertComments,
+      insertCommentLinks,
+      markCommentUpdated: markCommentUpdatedFactory({ db }),
+      commentsEventsEmit: CommentsEmitter.emit,
+      addReplyAddedActivity
+    })
+
     const ensureOnboardingProject = ensureOnboardingProjectFactory({
       getOnboardingBaseStream,
       getFirstAdmin,
diff --git a/packages/server/modules/cross-server-sync/services/commit.ts b/packages/server/modules/cross-server-sync/services/commit.ts
index 6077ca6d6..b86bbe1eb 100644
--- a/packages/server/modules/cross-server-sync/services/commit.ts
+++ b/packages/server/modules/cross-server-sync/services/commit.ts
@@ -14,7 +14,6 @@ import { createCommitByBranchId } from '@/modules/core/services/commit/managemen
 import { getUser } from '@/modules/core/repositories/users'
 import type { SpeckleViewer } from '@speckle/shared'
 import { retry } from '@speckle/shared'
-import { createCommentReplyAndNotify } from '@/modules/comments/services/management'
 import {
   createApolloClient,
   assertValidGraphQLResult
@@ -28,7 +27,10 @@ import {
   CrossSyncProjectViewerResourcesQuery
 } from '@/modules/cross-server-sync/graph/generated/graphql'
 import { DownloadCommit } from '@/modules/cross-server-sync/domain/operations'
-import { CreateCommentThreadAndNotify } from '@/modules/comments/domain/operations'
+import {
+  CreateCommentReplyAndNotify,
+  CreateCommentThreadAndNotify
+} from '@/modules/comments/domain/operations'
 
 type LocalResources = Awaited<ReturnType<ReturnType<typeof getLocalResourcesFactory>>>
 type LocalResourcesWithCommit = LocalResources & { newCommitId: string }
@@ -370,7 +372,7 @@ const cleanViewerState = (
 
 type SaveNewThreadsDeps = {
   createCommentThreadAndNotify: CreateCommentThreadAndNotify
-  createCommentReplyAndNotify: typeof createCommentReplyAndNotify
+  createCommentReplyAndNotify: CreateCommentReplyAndNotify
 }
 
 const saveNewThreadsFactory =