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The ways to grow a tech startup company are outnumbered only by the ways to skin a cat.

In between multiple rounds of venture capital from investment groups and skin-of-your-teeth bootstrapping, there exists an ecosystem of organizations designed to grow startups with a mixture of business acceleration, development assistance, small rounds of funding (usually just enough to keep Top Ramen on the table), and general advisement. Each organization has its own trademark way of doing things, and here are five that we find fascinating.

A new startup services firm has reared its head in Bloomington, Indiana. Meet SproutBox, the brainchild of Marc Guyer, Mike Trotzke, and Brad Wisler.

Much like Remarkable Wit, a venture technology firm we recently covered, SproutBox focuses on product development and essential business services, investing talent in startup companies in exchange for equity.