vo.id vs Obsidian
Obsidian rewards tending: links, graphs, a system of your own. The void is for the thoughts you don't want to tend. You say it, it's sorted, and it comes back to you later.
Obsidian is a local-first editor for a vault of Markdown files, extended by a large ecosystem of community plugins. It's free for personal use, with optional paid Sync and Publish.
no setup
There's no vault, no plugin to pick and no folder structure to design. Open it, say the thing, and close it.
voice and sms capture
Record a voice memo and it's transcribed. Text one from any phone without opening an app. Either way it's classified as a task, a note or a question when it arrives.
chat with your notes, built in
Ask a question across everything you've captured and get an answer that links to the memos it came from. There's no plugin to install and no API key to manage.
integrations
Send a task to TickTick or an event to Google Calendar from any memo, with the date read from what you said.
privacy, plainly
Obsidian keeps your notes as files on your own devices, and no hosted service can match that. The void is hosted and says plainly what that means: your memos are encrypted at rest, never used to train a model, never sold or shared, and you can export all of them at any time.
when Obsidian is the better pick
If you want a long-lived, linked knowledge base in plain files that you control, use Obsidian. Plenty of people use both: the void to catch things on the move, and Obsidian for what's worth keeping.
More on privacy, integrations and pricing.
Meta Muse, Apple Notes, Obsidian, OneNote, Notion, Evernote, AudioPen, Voicenotes, Drafts, Google Keep, Otter, Mem and Bear are trademarks of their respective owners. vo.id is not affiliated with or endorsed by any of them. Comparisons reflect publicly available information as of September 2026.