Vellum vs Viktor

Choose Vellum if you want a personal AI that knows you, works across your Mac, iPhone, email, and Slack, and builds memory that compounds over time. Vellum is built for individuals who want a capable assistant that persists across every surface they use, not just inside a team chat tool.

Viktor has an advantage if your team is already deep in Slack or Microsoft Teams and you want to automate team-level workflows without installing a new app. Its 3,200+ business tool integrations and workspace-level design make it a reasonable fit for shared task delegation in Slack-centric organizations.

Both start at $50/mo on paid plans. Viktor offers a free tier with $100 in credits and no credit card required. Vellum offers a free Base plan with 10 credits and referral credits. Viktor's pricing scales across a shared workspace, so team usage can compound costs quickly. Vellum's Pro plan gives each individual configurable compute and storage with a personal assistant email and subdomain.

Viktor is added to an existing Slack or Teams workspace, which is quick if you have admin access. Vellum setup takes 5 to 10 minutes: download the Mac app or start on Web, sign in, and connect your tools via one-click OAuth. Neither requires a terminal or config files. The key difference is that Viktor requires workspace admin permissions, while any individual can set up Vellum independently.

Viktor retains context within Slack or Teams threads and can reference workspace history, but this context is shared across your team rather than personal to you. It does not build a structured, individual memory that compounds over time. Vellum builds a personal memory graph that persists across all surfaces and grows more useful with each session.

Viktor advertises 3,200+ tool integrations focused on business and team software, all accessed through Slack or Teams. Vellum connects to 50+ services through managed OAuth, including Google, Notion, GitHub, Linear, and Slack, and executes real actions in those services on your behalf. Viktor's breadth is wider at the team level; Vellum's integrations require no token management from you.

Viktor does not have a native iPhone app, Mac app, web app, or voice interface like Vellum does. It works exclusively inside Slack and Microsoft Teams. If you need your assistant outside of a team chat tool, Viktor is not an option.

Viktor is a cloud-only platform with no self-host option. Your conversations, task history, and workspace context are processed and stored on Viktor's infrastructure. Workspace context is shared among team members by design, so private conversations within a team workspace are not isolated. Vellum offers a native Mac app that runs on your own hardware, a managed Vellum Cloud option with per-customer isolation, and a self-hosted path. On every deployment path, Vellum never has access to your data.

Viktor is a closed-source proprietary platform. There is no public codebase, no self-host option, and no way to audit or extend it. Vellum is open source under the MIT license with the full codebase available on GitHub, and supports self-hosting for teams that want full infrastructure control.

Yes. Viktor operates inside Slack at the team or workspace level, while Vellum serves as your personal assistant across Mac, iOS, voice, email, and more. They target different scopes: Viktor is about delegating team workflows inside a chat platform, Vellum is about building a personal assistant that knows you and acts on your behalf across your entire digital life. Many users could reasonably use both without conflict, and even have both agents communicate to each other.

Viktor is designed around the team and workspace context inside Slack or Microsoft Teams. Its memory model, pricing, and integration surface are all oriented toward shared team workflows rather than individual use. If you want an AI that knows you personally, adapts to your preferences, and works across your tools and devices, Vellum is the better fit.