San Francisco-based Thumbtack, a startup that provides a network connecting consumers with service professionals, secured a $12.5 million "Series B" investment round led by Sequoia Capital. The new financing will be used to expand Thumbtack's team. Prior investors Javelin Venture Partners and MHS Capital also contributed to the new investment round.

Sequoia's Bryan Schreier will join Thumbtack's board of directors.

Launched in 2009, Thumbtack now counts 250,000 service professionals and generates about $300 million a year in new business for local professionals nationwide, according to the company.

“Our mission at Thumbtack is to use technology to save people time and money and to bring skilled professionals more work,” said Marco Zappacosta, CEO and founder of Thumbtack. "We couldn't be more excited to partner with Sequoia in bringing this vision to millions of people nationwide — and eventually globally.”