Mem Agent
8.2#1 in personal knowledge management softwareFrom $9 a monthFree planiOSWebAPIExtension
VisitMem Agent vs Second Brain
Second Brain
6.5#37 in ai note-taking appsFrom $39.99 a yearFree planiOS
VisitWhat both publish
| Fact | Mem Agent | Second Brain |
|---|---|---|
| Maker | The privacy policy identifies the maker as Mem Labs, Inc., doing business as Mem. | The app is described as developed by one person, Gökhan Çelikkaya. |
| Privacy | Mem says it does not sell user data, show third-party ads, or use personal information or notes to train generalized AI or machine-learning models. | The maker says notes are isolated per account, AI processing requires explicit consent before the first note is processed, and notes are not used to train AI models. |
| Product | Mem describes itself as an AI thought partner that captures ideas, meetings, and research and helps users retrieve them when needed. | Second Brain is an iPhone notes app that lets users capture thoughts and ask questions about them later in plain language. |
Mem Agent plans
- Mem Plus$9 a month
- Mem Pro$29 a month
- Mem Pro 2×$49 a month
- Mem Pro 5×$99 a month
- Mem Pro 10×$149 a month
- Mem Pro 20×$199 a month
Second Brain plans
- FreeFree
- Pro (monthly)$4.99 a month
- Pro (yearly)$39.99 a year
Pick Mem Agent if…
Mem suits people who want to collect ideas, meeting records, and research in a searchable workspace. It may also fit users who want voice capture, task tracking, or connections to calendars and Claude.
Pick Second Brain if…
You want what its maker publishes above — check its page for the details.