Boston is a city of firsts. America’s first public park was established there in 1634, and it was the first U.S. city with its own police department. It’s even home to the nation’s oldest underground metro and one of the first general-purpose, digital computers.

Bean Town has always been a breeding ground for innovators and trailblazers, and this year is no exception. Across a wide range of industries--from advertising to education--here are Boston's top 10 fastest-growing private companies.

10. The Mount Vernon Company

Founded more than 30 years ago by Bruce A. Percelay, this owner and developer ranks No. 1,043 on the overall Inc. 5000, with 2014 revenue of $102 million. The company focuses on providing professionally managed work force housing to enable middle-market renters to enjoy the benefits of living in Boston at affordable rents.

9. Dane Street

Ranking at No. 855 on the Inc. 5000, this health company offers peer review programs to more than 60 workers' compensation and managed-care organizations to assist in the claims management process. Dane Street grew by more than 500 percent between 2011 and 2014, when it earned more than $21 million.

8. Pixability

This ad-buying and video marketing platform for YouTube made it to No. 737 on Inc.’s 2015 list. Founded in 2008 by Bettina Hein, the only female CEO in the Boston top 10, Pixability grew its sales to $4.4 million in 2014, up 600 percent from roughly $620,000 in 2011.

7. PrepNow

Founded in 2011, this education company provides one-on-one online tutoring to help students in grades K-12 and college improve their grades and test scores. With three-year revenue growth of 790 percent--and 2014 total revenue of more than $2 million--PrepNow has earned a spot at No. 590 on the Inc. 5000.

6. WordStream

This advertising company--No. 574 on the 2015 Inc. 5000--develops search marketing software, as well as provides managed advertising services and marketing advice on its blog. WordStream was founded in 2007 by Larry Kim and grew more than 800 percent between 2011 and 2014, when it generated more than $10 million in annual revenue.

5. Next Step Living

This home energy company is focused on reducing its customers’ energy bills and carbon footprints through weatherization, solar panel installation, and revamped heating and cooling systems. Next Step Living, No. 517 on this year’s Inc. 5000, grew its revenue more than 900 percent to $101 million last year.

4. VMTurbo

Sitting at No. 348 on the 2015 Inc. 5000, VMTurbo provides virtual management software to financial institutions, e-commerce sites, and service providers. The company was founded in 2009 by Shmuel Kliger and earned roughly $25 million in 2014, up 1,367 percent from 2011.

3. Localytics

This software company,  No. 279 on the Inc. 5000, provides an analytics and marketing platform to help its clients understand and predict user engagement. Making more than $9 million in sales in 2014, the site is used by a number of successful companies, including Microsoft,, and The New York Times. Led by CEO Raj Aggarwhal, Localytics saw a growth rate of more than 1,600 percent between fiscal years 2011 and 2014.

2. Meteorix

Ranked No. 249 on the Inc. 5000Meteorix works exclusively with its finance and HR system Workday to help business owners identify underperformance and implement solutions. In 2014, it reeled in more than $25 million, growing more than 1,800 percent since fiscal year 2011. Founder Frank Selldorff was a 2014 Ernst & Young Entrepreneur of the Year finalist and is also chairman of Momentum Equity Partners, a venture capital firm investing in innovative tech companies.

1. HaystackID

With a three-year growth rate of more than 4,000 percent, this data collection company, which works with businesses and law firms, reeled in more than $4 million in revenue in 2014. Founded in 2011 by logistic support expert Kevin D. Glass, HaystackID ranks No. 72 on the 2015 Inc. 5000.