Mem Agent vs TriliumNext Notes

Mem Agent is an AI thought partner for capturing ideas, meetings and research, then retrieving them when needed. Mem Chat can answer workspace questions, create or update notes, organize them and draft content using workspace context. Deep Search accepts natural-language descriptions of what a user wants to find. Voice Mode records and transcribes meetings or spoken thoughts into structured notes. The Chrome extension captures and summarizes webpages and YouTube videos, organizes clips into collections and lets users edit notes from its popup; it is currently available only for Google Chrome. Mem connects to Google Calendar and Microsoft Outlook, but only displays meetings with two or more guests. It can connect to Claude to search Mem knowledge, save conversations as notes, update documents and organize a workspace. The free plan includes 25 messages and 25 new notes per month, tracking for 25 notes, 15 open tasks and projects, and three Voice Mode hours. Mem Plus costs $9 a month. Content is encrypted in transit and at rest, but is unencrypted for AI processing by trusted third-party vendors. Mem supports one-click exports of notes and collections as Markdown files.

TriliumNext Notes is a free, open-source application for taking notes and maintaining a personal knowledge base. It uses an outliner structure in which notes can be nested hierarchically and placed in multiple locations. Supported note types include text, Markdown, code, spreadsheets, canvases, Mermaid diagrams, mind maps and files. Collections can present the same material as calendars, tables, Kanban boards, geomaps, presentations or dashboards. Full-text search can inspect image and PDF text through OCR. Notes can be imported from Markdown, HTML and OPML and exported to those formats. Self-hosted or cloud instances synchronize across devices and provide mobile browser access through a PWA; no official mobile app is provided. JavaScript supports widgets and scheduled or event-driven scripts. Optional AI connections use your own provider keys. Protected notes use AES-128 CBC, while metadata remains unencrypted. The software is designed for one user, not simultaneous shared editing.