FlowFn vs Vellum

FlowFn is a web and API platform for connecting apps and AI models into workflow automations and autonomous AI agents. Its visual builder handles triggers, AI steps, conditions, loops, parallel branches, optional tasks, run views, version history, and JSON import or export. FlowFn says it supports more than 60 AI models and more than 100 app integrations, while allowing provider keys and custom OAuth apps. Agents can run in an embeddable chat widget, by webhook, on a schedule, or in the Playground, and can pause for human approval. Public forms support uploads, conditional fields, and validation; interactive mini apps and multi-page sites are also available. Data Sheets provide tabular storage, CSV import, a query API, and public visitor writes. The Free plan costs nothing and allows up to three workflows and 200 monthly platform AI credits.

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.