Greg Isenberg

CEO of Late Checkout, host of The Startup Ideas Podcast, creator of Ideabrowser

@gregisenberg727K followersCommunity Builders Creators & Writers AI Builders Acquirers & Indie Investors

About Greg Isenberg

Greg Isenberg is a serial entrepreneur and one of the most prolific sources of startup ideas on the internet. He sold his first company, the social video discovery app 5by, to StumbleUpon, then built Islands, a community messaging app that was acquired by WeWork, where he briefly led product strategy. He has also advised companies such as Reddit and TikTok.

After starting and selling venture-backed community companies, he switched to self-funding. In 2020 he co-founded Late Checkout, a holding company that starts each business as an internet audience or community and runs an agency, studio and portfolio of products.

Greg is best known for sharing free startup ideas daily on X and on The Startup Ideas Podcast, where he interviews founders and breaks down how to build AI-native, community-led businesses. In 2025 he launched Ideabrowser, an AI-powered database of trends and startup ideas, alongside products like The Vibe Marketer and Boring Marketer.

Products by Greg Isenberg

Late Checkout

latecheckout.studio

Holding company, agency and studio building community-based and AI-native internet businesses.

Ideabrowser

ideabrowser.com

AI-powered database of trends and startup ideas worth building, with daily curated ideas.

The Vibe Marketer

thevibemarketer.com

Resources for automating marketing tasks with AI.

Boring Marketer

boringmarketer.com

AI marketing brand from the Late Checkout portfolio.

5by

acquired

Social video discovery app, acquired by StumbleUpon.

Islands

acquired

Community group-messaging app, acquired by WeWork.

Exit stories

Islands

→ WeWork · 2019

by Greg Isenberg

5by

→ StumbleUpon · 2013

by Greg Isenberg

Greg Isenberg's journey, 2012–20255 milestones · self-reported

First product
Exit
Launch / milestone
Started 2012

2012First product: Founded 5by, a social video discovery app
2013Exit: Sold 5by to StumbleUpon
2020Launch: Co-founded Late Checkout, a community-first holding company
2021Launch: Launched The Startup Ideas Podcast
2025Launch: Launched Ideabrowser, an AI-powered startup ideas database

Timeline

2012 — Founded 5by, a social video discovery app.
2013 — Sold 5by to StumbleUpon.
2020 — Co-founded Late Checkout, a community-first holding company.
2021 — Launched The Startup Ideas Podcast.
2025 — Launched Ideabrowser, an AI-powered startup ideas database.

How Greg builds

Start with a community or audience, then build products for it.
Communities and brand are the new moats in an AI world.
Give ideas away freely; execution and distribution are what matter.
Self-fund and build a portfolio instead of chasing venture rounds.

Learn from Greg Isenberg

[podcast]

The Startup Ideas Podcast

Twice-weekly show with free startup ideas and founder breakdowns.

by Greg Isenberg

[youtube]

Greg Isenberg on YouTube

Video episodes of the podcast and tutorials on AI-native startups.

by Greg Isenberg

[newsletter]

Greg's Letter

Newsletter with startup ideas and frameworks.

by Greg Isenberg

[template]

Ideabrowser

Searchable database of startup ideas with free daily idea and paid tiers.

by Greg Isenberg

Greg Isenberg FAQ

Who is Greg Isenberg?

Greg Isenberg is the CEO of Late Checkout, host of The Startup Ideas Podcast and creator of Ideabrowser. He previously sold 5by to StumbleUpon and Islands to WeWork.

What is Late Checkout?

Late Checkout is Greg's holding company, founded in 2020, that builds, incubates and acquires community-based internet businesses and runs a design agency.