diff --git a/server/src/app.module.ts b/server/src/app.module.ts
index ded08a96a..dd7ff281f 100644
--- a/server/src/app.module.ts
+++ b/server/src/app.module.ts
@@ -20,6 +20,8 @@ import { ApiService } from 'src/services/api.service';
 import { MicroservicesService } from 'src/services/microservices.service';
 import { otelConfig } from 'src/utils/instrumentation';
 import { ImmichLogger } from 'src/utils/logger';
+import { IAssetDuplicateRepository } from 'src/interfaces/asset-duplicate.interface';
+import { AssetDuplicateRepository } from 'src/repositories/asset-duplicate.repository';
 
 const providers = [ImmichLogger];
 const common = [...services, ...providers, ...repositories];
diff --git a/server/src/cores/system-config.core.ts b/server/src/cores/system-config.core.ts
index 01bfacc9b..16f40e6ae 100644
--- a/server/src/cores/system-config.core.ts
+++ b/server/src/cores/system-config.core.ts
@@ -55,6 +55,7 @@ export const defaults = Object.freeze<SystemConfig>({
     [QueueName.METADATA_EXTRACTION]: { concurrency: 5 },
     [QueueName.FACE_DETECTION]: { concurrency: 2 },
     [QueueName.SEARCH]: { concurrency: 5 },
+    [QueueName.DUPLICATE_DETECTION]: { concurrency: 5 },
     [QueueName.SIDECAR]: { concurrency: 5 },
     [QueueName.LIBRARY]: { concurrency: 5 },
     [QueueName.MIGRATION]: { concurrency: 5 },
@@ -71,6 +72,7 @@ export const defaults = Object.freeze<SystemConfig>({
     clip: {
       enabled: true,
       modelName: 'ViT-B-32__openai',
+      duplicateThreshold: 0.01,
     },
     facialRecognition: {
       enabled: true,
diff --git a/server/src/dtos/job.dto.ts b/server/src/dtos/job.dto.ts
index 1173ad8d6..b2fd54274 100644
--- a/server/src/dtos/job.dto.ts
+++ b/server/src/dtos/job.dto.ts
@@ -73,6 +73,9 @@ export class AllJobStatusResponseDto implements Record<QueueName, JobStatusDto>
   @ApiProperty({ type: JobStatusDto })
   [QueueName.SEARCH]!: JobStatusDto;
 
+  @ApiProperty({ type: JobStatusDto })
+  [QueueName.DUPLICATE_DETECTION]!: JobStatusDto;
+
   @ApiProperty({ type: JobStatusDto })
   [QueueName.FACE_DETECTION]!: JobStatusDto;
 
diff --git a/server/src/dtos/model-config.dto.ts b/server/src/dtos/model-config.dto.ts
index d1e8bf339..9f9bb836c 100644
--- a/server/src/dtos/model-config.dto.ts
+++ b/server/src/dtos/model-config.dto.ts
@@ -23,6 +23,13 @@ export class CLIPConfig extends ModelConfig {
   @Optional()
   @ApiProperty({ enumName: 'CLIPMode', enum: CLIPMode })
   mode?: CLIPMode;
+
+  @IsNumber()
+  @Min(0.01)
+  @Max(0.1)
+  @Type(() => Number)
+  @ApiProperty({ type: 'number', format: 'float' })
+  duplicateThreshold!: number;
 }
 
 export class RecognitionConfig extends ModelConfig {
diff --git a/server/src/dtos/system-config.dto.ts b/server/src/dtos/system-config.dto.ts
index 740f1672e..82b1844a7 100644
--- a/server/src/dtos/system-config.dto.ts
+++ b/server/src/dtos/system-config.dto.ts
@@ -184,6 +184,12 @@ class SystemConfigJobDto implements Record<ConcurrentQueueName, JobSettingsDto>
   @Type(() => JobSettingsDto)
   [QueueName.SEARCH]!: JobSettingsDto;
 
+  @ApiProperty({ type: JobSettingsDto })
+  @ValidateNested()
+  @IsObject()
+  @Type(() => JobSettingsDto)
+  [QueueName.DUPLICATE_DETECTION]!: JobSettingsDto;
+
   @ApiProperty({ type: JobSettingsDto })
   @ValidateNested()
   @IsObject()
diff --git a/server/src/entities/asset-duplicate.entity.ts b/server/src/entities/asset-duplicate.entity.ts
new file mode 100644
index 000000000..e395556c9
--- /dev/null
+++ b/server/src/entities/asset-duplicate.entity.ts
@@ -0,0 +1,16 @@
+import { AssetEntity } from 'src/entities/asset.entity';
+import { Entity, Index, JoinColumn, OneToMany, PrimaryColumn } from 'typeorm';
+
+@Entity('asset_duplicates')
+@Index('asset_duplicates_assetId_uindex', ['assetId'], { unique: true })
+export class AssetDuplicateEntity {
+  @OneToMany(() => AssetEntity, (asset) => asset.duplicates)
+  @JoinColumn({ name: 'assetId', referencedColumnName: 'id' })
+  assets!: AssetEntity;
+
+  @PrimaryColumn()
+  id!: string;
+
+  @PrimaryColumn()
+  assetId!: string;
+}
diff --git a/server/src/entities/asset.entity.ts b/server/src/entities/asset.entity.ts
index 916636115..eabe1ccb5 100644
--- a/server/src/entities/asset.entity.ts
+++ b/server/src/entities/asset.entity.ts
@@ -24,6 +24,7 @@ import {
   PrimaryGeneratedColumn,
   UpdateDateColumn,
 } from 'typeorm';
+import { AssetDuplicateEntity } from './asset-duplicate.entity';
 
 export const ASSET_CHECKSUM_CONSTRAINT = 'UQ_assets_owner_library_checksum';
 
@@ -168,6 +169,13 @@ export class AssetEntity {
 
   @OneToOne(() => AssetJobStatusEntity, (jobStatus) => jobStatus.asset, { nullable: true })
   jobStatus?: AssetJobStatusEntity;
+
+  @Column({ nullable: true })
+  duplicateId?: string | null;
+
+  @ManyToOne(() => AssetDuplicateEntity, { nullable: true, onDelete: 'SET NULL', onUpdate: 'CASCADE' })
+  @JoinColumn({ name: 'duplicateId' })
+  duplicates?: AssetDuplicateEntity | null;
 }
 
 export enum AssetType {
diff --git a/server/src/entities/index.ts b/server/src/entities/index.ts
index 4b568cd9c..f7b08f11a 100644
--- a/server/src/entities/index.ts
+++ b/server/src/entities/index.ts
@@ -20,12 +20,14 @@ import { SystemMetadataEntity } from 'src/entities/system-metadata.entity';
 import { TagEntity } from 'src/entities/tag.entity';
 import { UserTokenEntity } from 'src/entities/user-token.entity';
 import { UserEntity } from 'src/entities/user.entity';
+import { AssetDuplicateEntity } from 'src/entities/asset-duplicate.entity';
 
 export const entities = [
   ActivityEntity,
   AlbumEntity,
   APIKeyEntity,
   AssetEntity,
+  AssetDuplicateEntity,
   AssetStackEntity,
   AssetFaceEntity,
   AssetJobStatusEntity,
diff --git a/server/src/entities/system-config.entity.ts b/server/src/entities/system-config.entity.ts
index 98b882a36..190452e31 100644
--- a/server/src/entities/system-config.entity.ts
+++ b/server/src/entities/system-config.entity.ts
@@ -208,6 +208,7 @@ export interface SystemConfig {
     clip: {
       enabled: boolean;
       modelName: string;
+      duplicateThreshold: number;
     };
     facialRecognition: {
       enabled: boolean;
diff --git a/server/src/interfaces/asset-duplicate.interface.ts b/server/src/interfaces/asset-duplicate.interface.ts
new file mode 100644
index 000000000..6d80dbaae
--- /dev/null
+++ b/server/src/interfaces/asset-duplicate.interface.ts
@@ -0,0 +1,9 @@
+import { AssetDuplicateEntity } from 'src/entities/asset-duplicate.entity';
+
+export const IAssetDuplicateRepository = 'IAssetDuplicateRepository';
+
+export interface IAssetDuplicateRepository {
+  create(duplicateId: string, assetIds: string[]): Promise<void>;
+  delete(id: string): Promise<void>;
+  getById(id: string): Promise<AssetDuplicateEntity | null>;
+}
diff --git a/server/src/interfaces/job.interface.ts b/server/src/interfaces/job.interface.ts
index 6f07fc752..25c25e87d 100644
--- a/server/src/interfaces/job.interface.ts
+++ b/server/src/interfaces/job.interface.ts
@@ -5,6 +5,7 @@ export enum QueueName {
   FACE_DETECTION = 'faceDetection',
   FACIAL_RECOGNITION = 'facialRecognition',
   SMART_SEARCH = 'smartSearch',
+  DUPLICATE_DETECTION = 'duplicateDetection',
   BACKGROUND_TASK = 'backgroundTask',
   STORAGE_TEMPLATE_MIGRATION = 'storageTemplateMigration',
   MIGRATION = 'migration',
@@ -83,6 +84,7 @@ export enum JobName {
   // smart search
   QUEUE_SMART_SEARCH = 'queue-smart-search',
   SMART_SEARCH = 'smart-search',
+  DUPLICATE_DETECTION = 'duplicate-detection',
 
   // XMP sidecars
   QUEUE_SIDECAR = 'queue-sidecar',
@@ -198,6 +200,7 @@ export type JobItem =
   // Smart Search
   | { name: JobName.QUEUE_SMART_SEARCH; data: IBaseJob }
   | { name: JobName.SMART_SEARCH; data: IEntityJob }
+  | { name: JobName.DUPLICATE_DETECTION; data: IEntityJob }
 
   // Filesystem
   | { name: JobName.DELETE_FILES; data: IDeleteFilesJob }
diff --git a/server/src/interfaces/search.interface.ts b/server/src/interfaces/search.interface.ts
index 1287202ad..3efe45903 100644
--- a/server/src/interfaces/search.interface.ts
+++ b/server/src/interfaces/search.interface.ts
@@ -133,6 +133,7 @@ export interface SearchExifOptions {
 export interface SearchEmbeddingOptions {
   embedding: Embedding;
   userIds: string[];
+  maxDistance?: number;
 }
 
 export interface SearchPeopleOptions {
@@ -174,7 +175,6 @@ export type SmartSearchOptions = SearchDateOptions &
 export interface FaceEmbeddingSearch extends SearchEmbeddingOptions {
   hasPerson?: boolean;
   numResults: number;
-  maxDistance?: number;
 }
 
 export interface FaceSearchResult {
@@ -182,10 +182,17 @@ export interface FaceSearchResult {
   face: AssetFaceEntity;
 }
 
+export interface AssetDuplicateResult {
+  assetId: string;
+  duplicateId: string;
+  distance: number;
+}
+
 export interface ISearchRepository {
   init(modelName: string): Promise<void>;
   searchMetadata(pagination: SearchPaginationOptions, options: AssetSearchOptions): Paginated<AssetEntity>;
   searchSmart(pagination: SearchPaginationOptions, options: SmartSearchOptions): Paginated<AssetEntity>;
+  searchDuplicates(options: SearchEmbeddingOptions): Promise<AssetDuplicateResult[]>;
   searchFaces(search: FaceEmbeddingSearch): Promise<FaceSearchResult[]>;
   upsert(assetId: string, embedding: number[]): Promise<void>;
   searchPlaces(placeName: string): Promise<GeodataPlacesEntity[]>;
diff --git a/server/src/repositories/asset-duplicate.repository.ts b/server/src/repositories/asset-duplicate.repository.ts
new file mode 100644
index 000000000..1c09de947
--- /dev/null
+++ b/server/src/repositories/asset-duplicate.repository.ts
@@ -0,0 +1,39 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { AssetDuplicateEntity } from 'src/entities/asset-duplicate.entity';
+import { AssetEntity } from 'src/entities/asset.entity';
+import { IAssetDuplicateRepository } from 'src/interfaces/asset-duplicate.interface';
+import { Instrumentation } from 'src/utils/instrumentation';
+import { Repository } from 'typeorm';
+
+@Instrumentation()
+@Injectable()
+export class AssetDuplicateRepository implements IAssetDuplicateRepository {
+  constructor(@InjectRepository(AssetDuplicateEntity) private repository: Repository<AssetDuplicateEntity>) {}
+
+  async create(duplicateId: string, assetIds: string[]) {
+    await this.repository.manager.transaction(async (manager) => {
+      await manager.upsert(
+        AssetDuplicateEntity,
+        assetIds.map((assetId) => ({ duplicateId, assetId })),
+        ['assetId'],
+      );
+      await manager.update(AssetEntity, assetIds, { duplicateId });
+    });
+  }
+
+  async delete(id: string): Promise<void> {
+    await this.repository.delete(id);
+  }
+
+  async getById(id: string): Promise<AssetDuplicateEntity | null> {
+    return this.repository.findOne({
+      where: {
+        id,
+      },
+      relations: {
+        assets: true,
+      },
+    });
+  }
+}
diff --git a/server/src/repositories/job.repository.ts b/server/src/repositories/job.repository.ts
index b55996ed0..af41dbd04 100644
--- a/server/src/repositories/job.repository.ts
+++ b/server/src/repositories/job.repository.ts
@@ -63,6 +63,7 @@ export const JOBS_TO_QUEUE: Record<JobName, QueueName> = {
   // smart search
   [JobName.QUEUE_SMART_SEARCH]: QueueName.SMART_SEARCH,
   [JobName.SMART_SEARCH]: QueueName.SMART_SEARCH,
+  [JobName.DUPLICATE_DETECTION]: QueueName.DUPLICATE_DETECTION,
 
   // XMP sidecars
   [JobName.QUEUE_SIDECAR]: QueueName.SIDECAR,
diff --git a/server/src/repositories/search.repository.ts b/server/src/repositories/search.repository.ts
index 4530d2295..7e3005442 100644
--- a/server/src/repositories/search.repository.ts
+++ b/server/src/repositories/search.repository.ts
@@ -9,10 +9,12 @@ import { SmartInfoEntity } from 'src/entities/smart-info.entity';
 import { SmartSearchEntity } from 'src/entities/smart-search.entity';
 import { DatabaseExtension } from 'src/interfaces/database.interface';
 import {
+  AssetDuplicateResult,
   AssetSearchOptions,
   FaceEmbeddingSearch,
   FaceSearchResult,
   ISearchRepository,
+  SearchEmbeddingOptions,
   SearchPaginationOptions,
   SmartSearchOptions,
 } from 'src/interfaces/search.interface';
@@ -144,6 +146,36 @@ export class SearchRepository implements ISearchRepository {
     return results;
   }
 
+  @GenerateSql({
+    params: [
+      {
+        embedding: Array.from({ length: 512 }, Math.random),
+        maxDistance: 0.6,
+        userIds: [DummyValue.UUID],
+      },
+    ],
+  })
+  searchDuplicates({ embedding, maxDistance, userIds }: SearchEmbeddingOptions): Promise<AssetDuplicateResult[]> {
+    const cte = this.assetRepository.createQueryBuilder('asset');
+    cte
+      .select('asset.id', 'assetId')
+      .addSelect('asset.duplicateId')
+      .addSelect('search.embedding <=> :embedding', 'distance')
+      .innerJoin('asset.smartSearch', 'search')
+      .where('asset.ownerId IN (:...userIds )')
+      .orderBy('asset.embedding <=> :embedding')
+      .limit(64)
+      .setParameters({ embedding: asVector(embedding), userIds });
+
+    const builder = this.assetRepository
+      .createQueryBuilder('asset')
+      .addCommonTableExpression(cte, 'cte')
+      .select('cte.*')
+      .where('cte.distance <= :maxDistance', { maxDistance });
+
+    return builder.getMany() as any as Promise<AssetDuplicateResult[]>;
+  }
+
   @GenerateSql({
     params: [
       {
diff --git a/server/src/services/job.service.ts b/server/src/services/job.service.ts
index c03b7c7bc..3c3803751 100644
--- a/server/src/services/job.service.ts
+++ b/server/src/services/job.service.ts
@@ -296,6 +296,13 @@ export class JobService {
         break;
       }
 
+      case JobName.SMART_SEARCH: {
+        if (item.data.source === 'upload') {
+          await this.jobRepository.queue({ name: JobName.DUPLICATE_DETECTION, data: item.data });
+        }
+        break;
+      }
+
       case JobName.USER_DELETION: {
         this.eventRepository.clientBroadcast(ClientEvent.USER_DELETE, item.data.id);
         break;
diff --git a/server/src/services/microservices.service.ts b/server/src/services/microservices.service.ts
index d5cae818e..3e4ee8e4f 100644
--- a/server/src/services/microservices.service.ts
+++ b/server/src/services/microservices.service.ts
@@ -14,6 +14,7 @@ import { StorageService } from 'src/services/storage.service';
 import { SystemConfigService } from 'src/services/system-config.service';
 import { UserService } from 'src/services/user.service';
 import { otelSDK } from 'src/utils/instrumentation';
+import { SearchService } from './search.service';
 
 @Injectable()
 export class MicroservicesService {
@@ -31,6 +32,7 @@ export class MicroservicesService {
     private storageService: StorageService,
     private userService: UserService,
     private databaseService: DatabaseService,
+    private searchService: SearchService,
   ) {}
 
   async init() {
@@ -47,6 +49,7 @@ export class MicroservicesService {
       [JobName.USER_SYNC_USAGE]: () => this.userService.handleUserSyncUsage(),
       [JobName.QUEUE_SMART_SEARCH]: (data) => this.smartInfoService.handleQueueEncodeClip(data),
       [JobName.SMART_SEARCH]: (data) => this.smartInfoService.handleEncodeClip(data),
+      [JobName.DUPLICATE_DETECTION]: (data) => this.searchService.handleSearchDuplicates(data),
       [JobName.STORAGE_TEMPLATE_MIGRATION]: () => this.storageTemplateService.handleMigration(),
       [JobName.STORAGE_TEMPLATE_MIGRATION_SINGLE]: (data) => this.storageTemplateService.handleMigrationSingle(data),
       [JobName.QUEUE_MIGRATION]: () => this.mediaService.handleQueueMigration(),
diff --git a/server/src/services/search.service.ts b/server/src/services/search.service.ts
index 03fa154a3..7c1a89caa 100644
--- a/server/src/services/search.service.ts
+++ b/server/src/services/search.service.ts
@@ -17,7 +17,10 @@ import {
 } from 'src/dtos/search.dto';
 import { AssetOrder } from 'src/entities/album.entity';
 import { AssetEntity } from 'src/entities/asset.entity';
+import { IAssetDuplicateRepository } from 'src/interfaces/asset-duplicate.interface';
 import { IAssetRepository } from 'src/interfaces/asset.interface';
+import { ICryptoRepository } from 'src/interfaces/crypto.interface';
+import { IEntityJob, JobStatus } from 'src/interfaces/job.interface';
 import { IMachineLearningRepository } from 'src/interfaces/machine-learning.interface';
 import { IMetadataRepository } from 'src/interfaces/metadata.interface';
 import { IPartnerRepository } from 'src/interfaces/partner.interface';
@@ -37,6 +40,8 @@ export class SearchService {
     @Inject(IAssetRepository) private assetRepository: IAssetRepository,
     @Inject(IPartnerRepository) private partnerRepository: IPartnerRepository,
     @Inject(IMetadataRepository) private metadataRepository: IMetadataRepository,
+    @Inject(ICryptoRepository) private cryptoRepository: ICryptoRepository,
+    @Inject(IAssetDuplicateRepository) private assetDuplicateRepository: IAssetDuplicateRepository,
   ) {
     this.configCore = SystemConfigCore.create(configRepository);
   }
@@ -139,6 +144,42 @@ export class SearchService {
     }
   }
 
+  async handleSearchDuplicates({ id }: IEntityJob): Promise<JobStatus> {
+    const { machineLearning } = await this.configCore.getConfig();
+    if (!machineLearning.enabled || !machineLearning.clip.enabled) {
+      return JobStatus.SKIPPED;
+    }
+
+    const asset = await this.assetRepository.getById(id, { smartSearch: { embedding: true } });
+    if (!asset?.resizePath || !asset.smartSearch?.embedding) {
+      return JobStatus.FAILED;
+    }
+
+    if (asset.duplicateId) {
+      return JobStatus.SKIPPED;
+    }
+
+    const duplicateAssets = await this.searchRepository.searchDuplicates({
+      userIds: [asset.ownerId],
+      embedding: asset.smartSearch.embedding,
+      maxDistance: machineLearning.clip.duplicateThreshold,
+    });
+
+    if (duplicateAssets.length === 0) {
+      return JobStatus.SUCCESS;
+    }
+
+    let duplicateId = duplicateAssets.find((duplicate) => duplicate.duplicateId)?.duplicateId;
+    duplicateId ??= this.cryptoRepository.randomUUID();
+
+    const duplicateAssetIds = duplicateAssets.map((duplicate) => duplicate.assetId);
+    duplicateAssetIds.push(asset.id);
+
+    await this.assetDuplicateRepository.create(duplicateId, duplicateAssetIds);
+
+    return JobStatus.SUCCESS;
+  }
+
   // TODO: remove after implementing new search filters
   /** @deprecated */
   async search(auth: AuthDto, dto: SearchDto): Promise<SearchResponseDto> {
diff --git a/server/src/services/system-config.service.spec.ts b/server/src/services/system-config.service.spec.ts
index b2079f606..4101a524e 100644
--- a/server/src/services/system-config.service.spec.ts
+++ b/server/src/services/system-config.service.spec.ts
@@ -74,6 +74,7 @@ const updatedConfig = Object.freeze<SystemConfig>({
     clip: {
       enabled: true,
       modelName: 'ViT-B-32__openai',
+      duplicateThreshold: 0.01,
     },
     facialRecognition: {
       enabled: true,