Pros of PhotoPrism

• More active development with frequent updates and releases
• Better support for RAW image formats and advanced metadata handling
• Faster indexing and search capabilities, especially for large libraries

Cons of PhotoPrism

• Requires more system resources, especially for initial indexing
• Less customizable user interface compared to LibrePhotos
• Steeper learning curve for advanced features and configuration

Code Comparison

PhotoPrism (Go):

func (m *Index) IndexFiles(files []string, opt IndexOptions) (complete Files, failed map[string]error) {
    done := make(chan File)
    jobs := make(chan string)
    failed = make(map[string]error)

    // Start worker goroutines
    for w := 1; w <= opt.Workers; w++ {
        go m.indexWorker(jobs, done)
    }

LibrePhotos (Python):

def index_photos(self):
    photos_to_add = []
    for image_path in self.all_files:
        if is_valid_image(image_path):
            photos_to_add.append(image_path)
    
    self.photos.bulk_create([
        Photo(image_path=p, owner=self.user) for p in photos_to_add
    ])

Pros of Lychee

• Lightweight and easy to set up
• Supports multiple users and sharing options
• Clean and intuitive user interface

Cons of Lychee

• Limited facial recognition and AI-powered features
• Fewer advanced organization and tagging options
• Less robust metadata handling and editing capabilities

Code Comparison

Lychee (PHP):

public function add(Request $request)
{
    $request->validate([
        'albumID' => 'required|string',
        'function' => 'required|string',
    ]);
    // ... (implementation)
}

Librephotos (Python):

def add_photo_to_album(request):
    user = request.user
    if not user.is_authenticated:
        return HttpResponse("Unauthorized", status=401)
    # ... (implementation)

Both projects use different languages and frameworks, making direct code comparison challenging. Lychee is built with PHP and Laravel, while Librephotos uses Python and Django. Lychee's code tends to be more concise and focused on web-based functionality, while Librephotos includes more complex features like machine learning integration and advanced metadata processing.

Lychee is better suited for users seeking a straightforward, web-based photo management solution. Librephotos offers more advanced features and AI-powered capabilities, making it ideal for users who require deeper organization and analysis of their photo collections.

Pros of immich

• More active development with frequent updates and releases
• Better mobile app support, including iOS and Android clients
• Faster performance for large photo libraries

Cons of immich

• Less mature project with potential stability issues
• Fewer advanced features compared to LibrePhotos (e.g., face recognition)
• Limited customization options for self-hosted deployments

Code Comparison

immich (TypeScript):

export async function generateAuthToken(user: User): Promise<string> {
  const payload: JwtPayload = { sub: user.id, email: user.email };
  return jwt.sign(payload, JWT_SECRET, { expiresIn: '1d' });
}

LibrePhotos (Python):

def generate_auth_token(user):
    payload = {'user_id': user.id, 'exp': datetime.utcnow() + timedelta(days=1)}
    return jwt.encode(payload, SECRET_KEY, algorithm='HS256')

Both projects use JWT for authentication, but immich implements it in TypeScript while LibrePhotos uses Python. The token generation logic is similar, with immich including the email in the payload and LibrePhotos using a more explicit expiration time.