Permit Central

**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.

CostLogic is a construction takeoff and estimating software platform that lets users upload PDF blueprints, perform scaled measurements, and create estimates and invoices. It combines takeoffs, job management, and billing in a single workflow for construction contractors and estimators.

Cost Plus Wellness is an open-source direct-contracting platform backed by Mark Cuban that connects self-funded employers with healthcare providers through publicly published contracts. Contracts include full pricing and terms, allowing employers to browse and download them for use with providers, while healthcare entities can publish their own contract templates and rates. The platform is designed to remove intermediaries, spread pricing, shared-savings fees, hidden administrative fees, patient collections, and prior authorization. Providers are to receive the full negotiated rate, and employers and third-party administrators are required to pay within 30 days of receiving a claim. Cost Plus Wellness reviews submissions and performs basic verification before publishing them; it describes itself as an open-source project rather than a business.

DealMachine is a real estate lead generation and marketing platform for property investors. It provides property and owner data, mobile 'driving for dollars' tools, owner contact and direct-mail features, skip-tracing and lead management/CRM functionality.

ConvertKit is an email marketing platform and automation service aimed primarily at creators and small businesses. It provides tools for building email lists, creating landing pages and forms, automations, subscriber tagging and segmentation, and commerce features for selling digital products and subscriptions.