Veltrix

**Stripe** is a financial technology company that provides online payment processing software and APIs for businesses of all sizes. Founded in 2010 by Irish brothers Patrick and John Collison, it lets companies accept payments, manage subscriptions and billing, handle tax compliance, prevent fraud, and access treasury and banking tools. Headquartered in South San Francisco and Dublin, it remains privately held.

TaxHacker is a self-hosted AI accounting application for freelancers, independent developers, and small businesses. It processes receipt photos, invoice PDFs, bank statements, and other documents with a configurable LLM, extracting dates, merchants, amounts, taxes, product names, and line items into a structured, Excel-like database. It can categorize transactions, split invoice items into separate transactions, and use custom fields with user-defined prompts; supported model backends include OpenAI, Google Gemini, Mistral, and local OpenAI-compatible endpoints such as Ollama, LM Studio, vLLM, and LocalAI. The application detects document currencies and converts transactions using historical exchange rates from the transaction date, including cryptocurrency support, and provides filtering, multi-project organization, import/export, and custom categories. The repository describes the project as being in early development and advises using it at one's own risk.

Shopify is an all-in-one commerce platform for building and operating online stores. It provides ecommerce software for managing products and product information, storefronts, checkout, and merchant operations, and can serve as an owned direct-to-consumer sales channel that retains customer relationships, email lists, and business data. The platform is also used in workflows involving product-image sourcing, marketing campaigns, advertising, and integrations with services such as Post Pilot and Reddit advertising.

Xero is a cloud-based accounting software platform for small businesses, developed by Xero Limited. It provides invoicing, bank reconciliation, payroll, and financial reporting, and integrates with banks, accountants, bookkeepers and third-party business applications. The company was founded in New Zealand and serves small businesses and their advisors internationally.

Vaultisse is an open-source web application for managing physical book collections at home, in schools, or in small lending libraries. It catalogs books by manual entry or ISBN scanning, automatically retrieving metadata through Google Books, Open Library, and LibraryThing fallback lookups, and tracks individual copies, their shelf or location, reading and availability status, damage, and current borrowers. It also provides full-text search, barcode and ISBN label printing, collection statistics, and organization by author, category, language, and format. The application uses a Vue 3 and Vuetify single-page frontend with an Express and TypeScript REST API backed by PostgreSQL. It supports JWT sessions in HTTP-only cookies, password hashing, optional OIDC/SSO, rate limiting, and a multilingual interface. Vaultisse can be run locally or deployed with Docker or PM2; its source code is licensed under the MIT License.