Kopern vs Vellum
Kopern
kopern.aiVellum
vellum.aiSide by side
| Figure | Kopern | Vellum |
|---|---|---|
| Price from | $79/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 | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 9 |
| Spec score · AI Agent Platforms | 8.1 (#29) | 8.7 (#9) |
| Integrations | The site lists WhatsApp, Telegram, Slack, GitHub, webhooks, MCP, and an embeddable chat widget among its connectors. | OAuth integrations include GitHub, Notion, Linear, Airtable, Spotify, Gmail, Google Calendar, Slack, and other services, while MCP servers provide additional tools. |
| Product | Kopern describes itself as a no-code AI agent builder for configuring, testing, grading, deploying, and monitoring agents. | Vellum describes itself as a personal AI assistant that can read files, manage calendars, send email, run code, and control a computer. |
| Support | The pricing page lists Community support for Starter, Priority email support for Pro, Email support for Usage, and Dedicated + SLA support for Enterprise. | 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
Kopern
Kopern is a no-code AI agent builder for configuring, testing, grading, deploying, and monitoring agents through web and API access. Agents can combine system prompts, skills, tools, extensions, and multiple models. Grading checks output matching, schemas, tool use, safety, and LLM judgments. The Optimization Lab includes prompt tuning, automated fixes, adversarial testing, model tournaments, evolution, and distillation. Connectors include WhatsApp, Telegram, Slack, GitHub, webhooks, MCP, and an embeddable chat widget; workflow orchestration connects to n8n, Zapier, and Make. Monitoring supports regression tests and Slack or email alerts when quality falls below a threshold. Authenticated endpoints include an OpenAI-compatible chat-completions API. Kopern lists human approvals, web browsing, security controls, and compliance badges. Plans range from free Starter to Pro at $79 a month and Enterprise at $499 a month; Usage is pay per use with no listed plan price.
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.