Most founders launch once. Hal Zeitlin has launched 4 times. The consistency of their engagement ratio (0.72 average) across those launches is the metric worth watching.
4 product launches tracked since 2023
Most founders launch once. Hal Zeitlin has launched 4 times. The consistency of their engagement ratio (0.72 average) across those launches is the metric worth watching.
All 4 products, sorted by community engagement.
| Year | Products | Avg Interest | Top Launch |
|---|---|---|---|
| 2023 | 1 | 124 | Auto Style Sheet |
| 2024 | 1 | 30 | FluidSEO |
| 2025 | 2 | 47 | Zena by ZenABM - LinkedIn Ads AI Analyst |
4 launches, 0.72 average engagement, 248 cumulative interest. Hal Zeitlin's portfolio shows a builder who maintains audience attention across multiple products.
They either have fewer than 3 tracked products, or their products launched below our engagement threshold. We set the bar at 3 products to ensure founder pages have enough data to be useful.
Founder pages are rebuilt with every index update. A founder's stats change when we add new products to the index.
Yes. If the same person is listed as a maker on products from different companies, all of those products appear on their founder page. That's one of the advantages of tracking by person rather than by company.
We track the makers listed on each product's launch page. A founder appears here if they're credited on 3 or more products in our index.
Serial builders. Some founders launch multiple products across different categories. Others iterate publicly, launching new versions or pivots as separate products. Both patterns show up in the data.