Impromptо vs Vellum

Impromptо provides PromptOps infrastructure for managing prompts with versioning, team collaboration, and API deployment. Its Playground runs prompts across OpenAI, Anthropic, and Google models simultaneously so users can compare outputs. Every save creates a version, with side-by-side diffs, token count comparisons, and one-click rollback. Team workspaces support Admin, Editor, and Viewer roles, plus activity logs and an audit trail. Applications can use the REST API to fetch an active prompt at runtime, including dynamic variables, so changes can take effect without redeployment. The Free plan includes unlimited prompts, API access, and import and export in JSON and Markdown, but limits Playground use to 50 runs per day and two model panels. Pro Team adds unlimited Playground runs, up to five panels, team workspaces, and priority support. It costs ₹599 a month under the Early Bird Offer; the page also shows ₹1,899. The site says data is encrypted at rest and workspace data is isolated with Row-Level Security.

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.