I track founders who ship repeatedly because their engagement patterns reveal what the market rewards. Justin Sijbolts has 4 products in the index. Here's how each performed.
4 product launches tracked since 2021
I track founders who ship repeatedly because their engagement patterns reveal what the market rewards. Justin Sijbolts has 4 products in the index. Here's how each performed.
All 4 products, sorted by community engagement.
| Year | Products | Avg Interest | Top Launch |
|---|---|---|---|
| 2021 | 1 | 206 | Kizie for Twitter |
| 2022 | 3 | 88 | Copywritter.io |
Since 2021, Justin Sijbolts has shipped 4 products. Kizie for Twitter was their biggest launch at 206 interest. Their most recent launch pulled 98. Earlier launches generated stronger community response.
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.
It means the community paid attention. High total interest across many launches signals consistent relevance. But a founder with 3 launches averaging 0.40 engagement may have built better products than one with 20 launches averaging 0.08.