Opus by AppliedAI vs Vellum
Opus by AppliedAI
opus.comVellum
vellum.aiSide by side
| Figure | Opus by AppliedAI | Vellum |
|---|---|---|
| Price from | — | $30/mo |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 9 |
| Spec score · AI Workflow Automation Software | 7.0 (#26) | 8.6 (#6) |
| Headquarters | Abu Dhabi, United Arab Emirates | United States |
| Integrations | The company says Opus connects to 3,500+ integrations, including Salesforce, ServiceNow, SAP, Snowflake, Okta, and Microsoft 365. | OAuth integrations include GitHub, Notion, Linear, Airtable, Spotify, Gmail, Google Calendar, Slack, and other services, while MCP servers provide additional tools. |
| Support | Published support tiers include Standard, Premium, and Premium Plus; channels range from email and live chat to telephone support and dedicated TAM routing for Premium Plus. | Vellum lists support contact as [email protected]. |
Plans
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
Opus by AppliedAI
Opus by AppliedAI has no write-up on Specifiction yet; its figures are above.
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.