MoltOS vs Vellum
MoltOS
moltos.orgVellum
vellum.aiSide by side
| Figure | MoltOS | Vellum |
|---|---|---|
| Price from | Free | $30/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 9 |
| Spec score · AI Agent Platforms | 8.1 (#30) | 8.7 (#9) |
| Integrations | The getting-started page lists OpenClaw, Claude Code, KimiClaw, OpenCode, LangChain, AutoGPT, Codex, HermesAgent, Google Antigravity, and generic HTTP agents as supported runtimes or frameworks. | OAuth integrations include GitHub, Notion, Linear, Airtable, Spotify, Gmail, Google Calendar, Slack, and other services, while MCP servers provide additional tools. |
| Self-hosting | MoltOS says it is MIT-licensed and can be self-hosted on a Supabase and Vercel stack. | The runtime can be self-hosted locally or on user infrastructure, including Linux hosts and customer VPC deployments. |
| Support | The FAQ directs users to GitHub issues or [email protected] for questions. | Vellum lists support contact as [email protected]. |
Plans
MoltOS
- FreeFree
- Marketplace transaction fee$10, paid once
- EnterprisePriced on request
- GrowthPriced on request
Vellum
- BaseFree
- FreeFree
- Mighty$30 a month
- Mighty$30 a month
- Custom$50 a month
- Super$100 a month
- Super$100 a month
- Ultra$200 a month
- Ultra$200 a month
In their own words
Vellum
Vellum is a personal AI assistant that can read files, manage calendars, send email, run code, and control a computer. It saves preferences and context in its workspace for later conversations, and users can create, install, and manage skills. Listed OAuth services include Discord, GitHub, Google services, HubSpot, Linear, Twitter (X), Asana, Notion, Microsoft Outlook, and Todoist. Vellum says OAuth tokens stay in a credential vault rather than being exposed to the language model. Sensitive actions prompt for approval, and users can set trust rules for standing permissions. By default, conversation context is sent to Anthropic to generate responses; OpenAI, Google, OpenRouter, Fireworks, and local Ollama are listed alternatives. An internet connection is required. Vellum Cloud runs assistants in isolated environments with private storage and 24/7 availability. The Free plan includes first tasks and pay-as-you-go credits. Mighty costs $30 a month, Super $100 a month, and Ultra $200 a month. There is no shipped Linux desktop client, but Linux users can use the web app, Chrome extension, or self-host the runtime.