The modern bookmark manager with full-text search, Pinboard sync, and AI-powered features
Stage
Not given
Not given
Founded
Not given
Not given
Based in
HR
Not given
Pricing model
Freemium
Free trial
Pricing
Acorn: Free. Oak: $30/year
$22/year for Cowpin (unlimited bookmarks, full-text search, tags & bundles, Pinboard-compatible API, one-click import, public RSS feeds, weekly digest email, 30 AI tag suggestions/month). Cowpin + AI add-on: $29/year additional ($51/year total) including smart semantic search, Ask your library with
Key features
Organize with folders and labels
RSS feed subscriptions
Newsletter inbox with unique email address per newsletter
AI assistant integration via MCP
Comments and mentions on shared links
Advanced search
Browser extensions
Dark mode
Import bookmarks from browser
Sub-50ms full-text search
Permanent S3 HTML archiving against link rot
2-way Pinboard sync and API compatibility
Distraction-free reader with highlights and Markdown export
Save from Chrome, Firefox, iOS, Android, email, and bookmarklet
Private AI semantic search and natural language queries
Native macOS desktop client and terminal CLI
Tags, bundles, and reading health tracking
What makes it different
Works with multiple AI assistants through Model Context Protocol
No ads and no data selling
Unlimited users on teams
Simple pricing with one paid plan
Human support, no chatbots or ticket systems
No lock-in with full export capability anytime to any browser
Prevents link rot with permanent full-page S3 HTML snapshots
2-way mirror keeps Pinboard as source of truth while adding power features
Private AI that never tracks or sells data
Tested daily on real browsers and phones in production
Pincone
Cowpin