Urban Innovation Fund

Co-founders Clara Brenner and Julie Lein share managing partner responsibilities and jointly lead investment decisions. Brenner previously ran Tumml, an urban-tech incubator; Lein was an early Tumml backer and operator. Their combined operating and investing experience gives them dual lenses on regulatory-heavy urban markets.

The firm leans heavily on its public-sector networks — government innovation offices, municipal chief technology officers, and urban-planning departments — for deal referrals that never reach generalist VC pipelines. Its Tumml alumni network and relationships with civic-tech accelerators provide an additional proprietary top-of-funnel that mainstream firms cannot replicate.

It is a venture capital firm, structured as a series of limited partnership funds, but with a mandate laser-focused on urban technology and public-sector-adjacent startups. Its investments span traditional VC verticals — mobility, climate, real estate tech — but always within the city-operating-context thesis.

Yes — unusually for an early-stage VC, Urban Innovation Fund has originated loans alongside equity to startups that need working capital for government contracts. This hybrid approach helps portfolio companies bridge public-sector payment cycles, a structural need that traditional venture equity alone cannot address.

Initial equity checks range from $500,000 to $2 million targeting pre-seed through Series A rounds. The firm typically leads or co-leads rounds and reserves meaningful follow-on capital, with a preference for companies that have some early traction in municipal or built-environment markets.

Clara Brenner co-founded and led Tumml, a San Francisco incubator focused on urban-tech startups addressing public-sector challenges, before launching Urban Innovation Fund in 2015. Tumml alumni and its broader network continue to inform the fund's pipeline; the incubator itself has been absorbed into the fund's fellowship and mentorship programs.

The firm concentrates on US metro areas, particularly coastal gateway cities — San Francisco, New York, Los Angeles — and emerging secondary hubs where municipal innovation needs are acute and traditional venture dollars are scarce. It does not maintain dedicated international operations.