Vellum
Your Personal Intelligence·vellum.ai
Vellum is an open-source personal AI assistant that runs as a native Mac app on the user's own machine or in Vellum Cloud, sharing one persistent memory across iOS, web app, voice, email, Telegram, Slack, and Microsoft Teams surfaces. It is not a chatbot: it has memory across days and months, its own identity (email, GitHub account, Slack handle), and real tools to browse the web, read/write files, run code, send email, manage calendars, and control a Mac. The runtime is MIT-licensed and can run in encrypted Vellum Cloud or locally, keeping data plain-text, exportable, and deletable.
What it's for
Features 18
- Assistant email address and custom subdomain
- Bookmarking of messages within conversations
- Browses the web, reads/writes files, runs code, sends email, manages calendars, controls a Mac
- Built-in managed web search provider
- Cron + Heartbeat scheduling
- Customizable assistant identity
- Import/migration of existing agents from ChatGPT, Claude, OpenClaw, or Hermes
- Installable plugin system extending assistant capabilities
- Managed OAuth connections to services
- Memory graph visualizing how memories connect
- Multi-surface access: Mac, iOS, web app, voice, email, Telegram, Slack, Microsoft Teams
- Permission and credential isolation
- Persistent memory (hybrid dense + sparse + RRF)
- Proactivity engine with hourly check-ins
- Real-time Voice Mode for spoken conversations
- Self-hosting option (open source deployment on own hardware/VPS)
- Skill-based extensibility (Python and TypeScript)
- Skills catalog for packaged task capabilities
Pricing
The pricing page lists Free, Mighty ($30/mo), Super ($100/mo), and Ultra ($200/mo) plans plus a Custom Plan, each bundling a computer size, storage, and credits. A $10/mo platform fee applies to Super and Ultra on top of listed prices. Credits are pay-as-you-go at $1 = 1 credit beyond what's included.
Listed as 'Base'/'Free' plan; JSON-LD structured data separately describes a 'Base' free plan and a 'Pro' plan at $50/mo, which conflicts with the pricing page's Mighty/Super/Ultra naming — see extraction_notes.
Fixed Small computer size; core assistant features
Does not include the $10/mo platform fee (that fee applies only to Super and Ultra).
Small computer (1 vCPU / 2 GiB), 10 GB storage, $25 in credits included
A $10/mo base/platform fee applies on top of computer and storage costs (covers custom subdomain, static IP, priority support).
Medium computer (2.5 vCPU / 5 GiB), 30 GB storage, $45 in credits included
A $10/mo base/platform fee applies on top of computer and storage costs (covers custom subdomain, static IP, priority support).
Large computer (4 vCPU / 8 GiB), 60 GB storage, $115 in credits included
Quote/build-your-own plan; 'Build a plan that fits exactly how you work.'
Configurable CPU, RAM, storage, or tokens
Self-hosting the open-source Vellum assistant on own hardware, VPS, or private cloud.
No platform fee, no computer tier charges; user provides own hardware/VPS/private cloud