VantagePrompt vs Vellum
VantagePrompt
vantageprompt.comVellum
vellum.aiSide by side
| Figure | VantagePrompt | Vellum |
|---|---|---|
| Price from | $3/mo | $30/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 7 | 9 |
| Spec score · AI Prompt Generators | 8.2 (#7) | 8.6 (#5) |
| Headquarters | Iordăcheanu, Prahova County, Romania | United States |
| Licence | The terms state that the service software, design and content are owned by Code Art Web Solutions S.R.L. or its licensors. | The Vellum Assistant repository is open source under the MIT licence; the managed Vellum Platform is a separate commercial offering. |
| Support | The free plan includes community support, and the company publishes [email protected] for support and privacy requests. | Vellum lists support contact as [email protected]. |
| What it does | VantagePrompt classifies rough prompts, chooses a template and framework, expands them into structured prompts, and scores results from 0 to 100. | Vellum is a personal AI assistant that can read files, manage calendars, control computers, take calls, perform transactions, and retain personal context. |
Plans
VantagePrompt
- FreeFree
- FreeFree
- Starter$3 a month
- Credit top-up$5, paid once
- Plus$5 a month
- Pro$10 a month
- Business$15 a month
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
VantagePrompt
VantagePrompt turns rough prompts into structured results through a multi-step LLM pipeline and scores each result from 0 to 100. Text prompts are returned as XML, while image, audio, and video prompts are adapted to the target tool’s grammar. The web platform includes batch refinement, versioned reusable templates, a public prompt marketplace, and team workspaces. It supports Gemini natively and routes to Claude and GPT through OpenRouter. Listed media tools include Midjourney, DALL-E, Flux, ElevenLabs, Suno, Udio, Sora, Runway, and Veo. The free plan includes 25 credits per month; paid plans start at $3 a month. The company says each credit represents $0.0005 of measured upstream model cost, with no token markup. Users can disable raw prompt storage and enable Zero Data Retention routing. VantagePrompt says submitted prompts are not sold or used for model training. Paid plans are currently unavailable to customers in the United Kingdom, though the free tier remains available.
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.