The short answer
RevenueBug centers each profile on provider-reported startup revenue and a daily history. Flippa is a broad marketplace for online businesses and digital assets, including websites, SaaS products, ecommerce stores, channels, and apps. Flippa also offers selling and deal tools, so the better choice depends on whether you are primarily showing traction or actively selling an asset.
How they compare
When RevenueBug fits
RevenueBug fits founders who want a public revenue profile first and a For sale badge only when they want buyer inquiries. The same profile can be shared with customers, peers, and potential buyers.
When Flippa fits
Flippa fits sellers who want access to a broad digital-asset marketplace and tools for listing, finding buyers, negotiating, and closing. Its wider asset coverage may be useful for a business that does not fit a revenue-profile-led discovery experience.
Using both
A RevenueBug profile can complement a Flippa listing by giving interested people a separate view of reported revenue history. Buyers should verify the scope and meaning of figures on either platform.
Features and terms can change. Check the linked primary sources before choosing a platform.