Thumbtack is an online marketplace that connects consumers with local professionals for various services, such as home improvement, events, and wellness. The company was founded in 2008 by Marco Zappacosta, Jonathan Swanson, and Sander Daniels, and has since grown to serve millions of customers across the United States. Thumbtack uses a proprietary matching algorithm to connect customers with the best professionals for their needs, and offers a range of tools to help professionals manage their businesses. The company has raised over $400 million in funding from investors such as Sequoia Capital, Google Capital, and Tiger Global Management.