Stella

Stella is a local natural language search engine designed for macOS users who need to find files by their content rather than their filenames. It belongs to the category of AI-powered desktop search tools, but with a strict focus on privacy and offline capability. Anyone who manages a large collection of PDFs, notes, or spreadsheets and struggles to locate documents by remembering exact names will find Stella invaluable. The core value is transforming file retrieval from a frustrating hunt into an intuitive conversation: you describe what you’re looking for, and Stella understands the meaning behind your query. This eliminates the need for manual organization or rigid naming conventions, making Stella a true productivity enhancer.

The primary pain point Stella solves is the time wasted searching for files when you can recall the content but not the filename. Traditional search tools like Spotlight rely on metadata, meaning you must know the exact title or extension to find a document. This breaks down when files have cryptic names, multiple versions, or when you are looking for a concept spanning several documents. For knowledge workers, researchers, and students, this friction disrupts workflow and reduces efficiency. Moreover, many cloud-based search solutions require uploading files, which compromises privacy. Stella addresses both issues: it searches by meaning and keeps everything on your machine, ensuring sensitive data never leaves your device.

The first major feature is “Meanings, Not Filenames.” Stella uses on-device AI to index the actual content of your documents—PDFs, notes, spreadsheets—and understands what they are about. Instead of matching keywords, it performs semantic search, so a query like “Q3 revenue report” finds the correct file even if it is named finance_2024_v3.xlsx. This works because Stella creates a vector representation of each document’s content, allowing it to match concepts rather than exact strings. The benefit is dramatic: you no longer need to remember how you named a file or dig through folders. You simply describe what you need, and Stella surfaces the most relevant documents instantly.

The second major feature is “No Cloud. No Trace.” Stella runs entirely on your machine, with no telemetry, no accounts, and no data leaving your device—not even temporarily. This is a completely private search engine that respects your digital sovereignty. The indexing and AI models are embedded in the 1.5 GB download, so everything happens locally. This design ensures that even highly confidential files stay secure. For users who work with sensitive information—legal documents, medical records, business plans—Stella offers peace of mind that no third party can access or analyze their data. It also works offline, on a plane or off-grid, making your library always searchable.