Boston has long been called "the Hub," but in recent years the nickname has also become fitting for the city's robust small-business community. In 2016, the U.S. Chamber of Commerce Foundation ranked Boston as the top spot in the U.S. for startups. This year, 34 Boston businesses made the Inc. 5000 list of the country's fastest-growing private companies. Here are the top 10, measured by revenue growth over the past three years.

10. The Stepping Stones Group 

2019 Inc. 5000 rank No. 1,257 | Three-year growth 329% | 2018 revenue $102M

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The Stepping Stones Group provides therapy and behavioral health services to K-12 students with special needs and autism. The company services more than 400 school districts and 90,000 students annually in over 30 states. This year is the Stepping Stones Group's fourth time on the Inc. 5000.

9. Mavrck

2019 Inc. 5000 rank No. 1,226 | Three-year growth 335% | 2018 revenue $3.4M

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Mavrck, an influencer marketing business, has a management platform that tracks the performance of campaigns and provides relationship management services. Its list of customers includes Nike, eBay, and Godiva.

8. Repsly

2019 Inc. 5000 rank No. 1,086 | Three-year growth 387% | 2018 revenue $4.5M

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Repsly's software platform provides performance metric reports, and territory management and mobile ordering tools for retail customers such as Kraft Heinz and Adidas. Now headquartered in Boston, the business was founded in Croatia in 2008.

7. Motus

2019 Inc. 5000 rank No. 948 | Three-year growth 448% | 2018 revenue $84M

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Motus makes driver management software that simplifies mileage tracking and calculates vehicle reimbursements for its clients' mobile workforces. The company grew to more than 200 employees in 2018 from 90 in 2015, and serves brands including Coca-Cola, Papa John's, and Kellogg's.

6. Forward Financing

2019 Inc. 5000 rank No. 760 | Three-year growth 573% | 2018 revenue $75.5M

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Located in the heart of Boston's financial district, Forward Financing provides small and medium-size businesses with up to $300,000 of financing within 24 hours of approval. This is Forward Financing's third time on the Inc. 5000, and co-founder and CEO Justin Bakes was a finalist for EY's 2019 Entrepreneur of the Year.

5. Social Fulcrum

2019 Inc. 5000 rank No. 591 | Three-year growth 751% | 2018 revenue $12.9M

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Social Fulcrum is an advertising agency that focuses on Facebook and Instagram campaigns. Co-founder and CEO Andrew Krebs-Smith started three other companies prior to Social Fulcrum, which is on the Inc. 5000 for the third year in a row.

4. BlueWave Solar

2019 Inc. 5000 rank No. 487 | Three-year growth 902% | 2018 revenue $78.6M

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BlueWave Solar, a certified B Corp, wants to bring solar power to everyone through its community solar sharing program and home solar loans. Since the company's founding in 2010, its projects have reduced carbon emissions by approximately 127,000 metric tons of CO2.

3. Dispatch Technologies

2019 Inc. 5000 rank No. 420 | Three-year growth 1,093% | 2018 revenue $7M

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Dispatch is a software provider focused on modernizing the home service experience. Using Dispatch, businesses can find and book local contractors and other service providers, and gather data on their projects in real time. The platform currently has more than 21,000 contractors, who use it to complete 50,000 jobs per day.

2. Privy

2019 Inc. 5000 rank No. 171 | Three-year growth 2,263% | 2018 revenue $3M

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Privy helps e-commerce companies drive sales, increase email list growth, and decrease cart abandonment. The startup is backed by investments from HubSpot, Accomplice, KiwiVenture, and marketing industry leader Mike Volpe.

1. Rocket Insights

2019 Inc. 5000 rank No. 156 | Three-year growth 2,418% | 2018 revenue $13.5M

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Founded in 2015, the product design and development agency has a host of high-profile clients including Hulu, Comcast, and Weight Watchers. In addition to its Boston headquarters, Rocket Insights has locations in New York City and Newburyport, Massachusetts.