David Cramer joined the show to talk about the recent license change of Sentry to the Business Source License from a BSD 3-clause license. We talk about the details that triggered this change, the specifics of the BSL license and its required parameters, the threat to commercial open source products like Sentry, his concerns for the “open core” model, and what the future of open source might look like in light of protections-oriented source-available licenses like the BSL becoming more common.

David Cramer dropped out of high school AND college, but that didn’t stop him. He ended up teaching himself programming and eventually landed his first job as the webmaster of a World of Warcraft community website. What a beginning… We talked through “the rough slog” period of Sentry and how David powered through to traction and enough profit for him and his partner to go full time, raise three rounds of funding, and take on New Relic.

Here’s a bonus segment from episode #57 of Founders Talk with David Cramer, co-founder and CEO of Sentry. Check the feed for the full length episode (later today). We talked about sales in the full length episode, but this BONUS segment is a completely isolated conversation that’s not included in the full length episode — so don’t gloss over this thinking it’s just a teaser.

David Cramer (CEO of Sentry) and Isaac Schlueter (CEO of npm) joined the show to talk about building businesses in open source, why they decided to turn their side projects into full-time work, how they experimented with finding steady sources of revenue, raising venture capital, working with investors and with community, and different company approaches to developing open source projects.