Karakeep is an exceptional piece of software. It has over 28,000 GitHub stars, and an AGPL-3.0 open source license. If you enjoy self-hosting, you can run it on Docker for free with unlimited bookmarks and storage. It archives full web pages with Monolith, archives video with yt-dlp, and supports Android, an API, and an MCP server. In those areas, Karakeep does things Tenoa does not do.
I built Tenoa because many people want a visual library without managing containers or servers. With Karakeep, you either set up Docker and Meilisearch yourself, or use Karakeep Cloud, which is free up to 10 bookmarks and $4 a month or $40 a year for Pro. With Tenoa on your desktop, you install an application. There is no server to configure and nothing to host.
Storage is another fundamental difference. Karakeep stores your data in a database. I could not confirm which database engine it uses. Tenoa saves every item as two plain files in a normal folder on your computer. One file is your untouched original file. Beside it sits a markdown note holding your note, tags, and summary. There is no library container. Any app on your computer can open and read that folder.
Pricing is also different. Tenoa is $49 once for up to three desktop computers, with a 14-day free trial and no card needed. That purchase includes a year of updates and hosted sync. After that, hosted sync and new features cost an optional $29 a year. If you stop paying, everything you own keeps working, same-network sync stays free, and security and compatibility fixes stay free. I run Tenoa as an independent, one-person business.