Sidenote
The business, the turning points, and the decisions behind them.
01 / WHAT IT BUILT
What the company did
Sidenote was a San Francisco productivity startup founded in 2023 by Stanford computer science roommates Jason Lin, Scott Hickmann, and Schwinn Saereesitthipitak as part of Y Combinator's Summer 2023 batch. The company built a Chrome extension that automated meeting follow-ups: it turned meeting notes into drafted emails, calendar invites, Jira tickets, and Slack messages, with integrations for tools such as Notion, Google Docs, and Linear.
02 / Sidenote FAILURE REASONS
Failure reasons
Sidenote's founders pivoted away from the meeting follow-up product before Y Combinator's Summer 2023 batch had even ended, judging that the AI meeting-notes category was moving too fast and crowding with well-funded competitors. The original extension was abandoned and is no longer actively marketed; Y Combinator now lists the company as inactive and the sidenote.ai domain is listed for sale.
03 / EVENT HISTORY
Events in the structured record
- Company founded
Stanford roommates Jason Lin, Scott Hickmann, and Schwinn Saereesitthipitak found Sidenote in San Francisco and join Y Combinator's Summer 2023 batch with a Chrome extension that automates meeting follow-ups.
- Pivot
The founders pivot away from the meeting follow-up product before the YC batch ends, as the AI meeting-notes category becomes crowded with competitors.
- Inactive status
Y Combinator lists Sidenote as inactive, the original extension is no longer actively marketed, and the sidenote.ai domain is listed for sale.
04 / CONTEMPORARY REBUILD ASSESSMENT
Difficulty of rebuilding this project today
Material for this section is being gathered and checked. It will appear here once ready.
Overall assessment: Not completed
05 / CAUSAL CHAIN
How the factors connect
- 01
Sidenote was funded through Y Combinator's Summer 2023 batch; no other financing rounds were publicly disclosed.
- 02
The company abandoned its meeting follow-up product and pivoted in 2023, generating no known sustained revenue from the original product.
- 03
No reliable realized-loss figure was disclosed.