Sam Lessin, Founder of OpenPhone

About Sam Lessin

Sam Lessin is the founder of OpenPhone. OpenPhone operates in SaaS and is based in San Francisco, CA. OpenPhone has raised $161M, latest Growth $105M (2025). Backers on record include Dave Morin, Slow Ventures.

Sam Lessin at a glance

Company

OpenPhone

Industry

SaaS

Location

San Francisco, CA

Total raised

$161M

Investors on record

Dave Morin, Slow Ventures

Frequently asked about Sam Lessin

Who is Sam Lessin?

Sam Lessin is the founder of OpenPhone. Full profile, funding history and background on StartupFundraising.com.

What company did Sam Lessin found?

Sam Lessin founded OpenPhone, a SaaS company based in San Francisco, CA.

How do I contact Sam Lessin?

Verified contact routes including LinkedIn, background and funding history for Sam Lessin are available on the StartupFundraising.com founder profile.

This founder profile draws on disclosed rounds, filings and investor records in the StartupFundraising database and is updated as new funding is recorded. Founders raising now use profiles like this one to study comparable SaaS journeys in San Francisco — who backed them, at what stage, and how much they raised.

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