Growth Capital that Works

Why Mainspring Capital

​For us, understanding the “why” in our previous companies has been the springboard for remarkable success.  Why do your employees come to work every day?  Why are your customers so committed?  Why do you win when others lose?

Knowing your "Why" can unlock incredible opportunities.

So, why Mainspring?  Everything we do is 100% focused on building great, lasting companies.  We do that by applying smart amounts of capital and buckets of know how to help management teams capture new markets and opportunities, develop winning new products and services and discover and expand on their own “why”.  

Do that effectively and consistently and returns will come.  
​Big, hairy returns.

We believe that:

• Effective use of growth equity can help companies cross the chasm, accelerate growth and help founders realize their dreams.
• Smart leverage that supports investor returns without punishing our companies
• Management teams with vision and commitment are core to success    

Who We Are 

We are a Boston-Based Provider of Private Capital to Growing Businesses

Mainspring Capital is built upon decades of experience and the recognition that that can be a real handicap.  We are the first people to admit what we don't know and never have to be the 'smartest guys in the room'.  At the end of the day, you're the expert in your business.  What we do is fairly simple - help you get low leverage, patient capital to drive growth or allow you to exit your business.