Tripwolf is a social travel guide and trip planner launched in 2008 that allows users to create and share travel guides. It has over 15,000 members, including 1,000 trip experts. Revenue comes from advertising, revenue sharing with booking partners, and subscriptions from partners. Competitors include TripAdvisor, which relies mainly on advertising, and Expedia, which uses transaction pricing and cost-per-click pricing. Tripwolf uses a community business model along with brokerage, advertising, and affiliate models. The model is scalable and sustainable through growing membership and potentially introducing a subscription service for premium features.