Last updated: June 2026
Viktor is built for corporate operations and team workflows inside Slack and Teams, connecting 3,200+ enterprise SaaS apps for departmental ticketing and routing.
Vellum is built for you personally. It adapts to your individual habits, manages your private communications, and operates across your personal and work life without corporate overhead.
Viktor is restricted to company Slack and Microsoft Teams workspaces, with configuration managed through administrative web consoles.
Vellum gives you true multi-surface autonomy: a native Mac app, mobile apps on iOS and Android, web app, email, voice calling, Slack, and Telegram.
Viktor holds CASA Tier 3 and SOC 2 Type 1 certifications with all workspace conversation logs and SaaS tokens stored centrally in Viktor cloud infrastructure.
Vellum lets you run locally with complete hardware ownership or in Vellum Cloud with zero-access encryption where Vellum cannot access your private data.
iOS app with Home Screen widgets, native Mac app, web app, voice, email, Slack, Telegram, Microsoft Teams, and Discord, now an official channel with a setup wizard. Sent messages can be edited in place in Slack and Telegram. Every surface shares the same memory and identity.
Viktor lives inside Slack and Microsoft Teams. No native Mac app, iOS app, web app, voice, or email surface.
Build me a habit tracker gets you a working, interactive app in the conversation. Read this page uses the browser extension to read your open tabs and act on the page you are looking at. Call the dentist and reschedule places an actual phone call with its own voice.
Executes business actions directly inside Slack and Teams across 3,200+ enterprise integrations, from CRM updates to ticket routing.
Run on-device as a native Mac app, on Vellum's managed cloud, or self-host on your own VPS.
Viktor is fully cloud-hosted with no on-device or self-host option.
Native agent skills plus 1-click integrations with 50+ services through managed OAuth, including native Calendly and Eventbrite. Your assistant acts in real services without you touching tokens or API keys.
Viktor connects to 3,200+ tools, primarily business and team software, through its Slack and Teams interface.
Vellum builds a structured memory of your projects, people, and preferences automatically, across every surface. It sharpens with every conversation and correction, and there is nothing to configure: no files to curate, no engine to pick, no embedding provider to wire up.
Context is scoped to Slack threads and workspace history, not to you personally.
Builds its own skills, learns your tone, and adapts based on what you reward and correct. Install new skills from a growing library, or just ask and it figures out a way.
Configured at the workspace level for team workflows, not tuned to individual users.
Open source under MIT license. Full codebase available on GitHub.
Viktor is a closed-source proprietary platform. No public codebase or self-host option.
Free Base plan with free credits to start. Paid plans from $30/mo (Mighty), $100 (Super), and $200 (Ultra) with pay-as-you-go credits, configurable compute and storage, and your assistant's own email and subdomain on higher tiers.
Free tier includes $100 in credits with no credit card required. Paid plans start at $50/mo.
Run locally on Mac, in Vellum Cloud, or self-host. Vellum never has access to your data on any deployment path.
All conversations run through Viktor's cloud. No self-host option. Workspace context is shared among team members.
Built-in scheduling for daily briefings, weekly reports, and hourly checks that just run on a cadence.
Viktor can execute scheduled tasks inside Slack. Scheduling is tied to the Slack workspace context.
Credentials live in an isolated vault and never enter the model layer, so prompt injection can't exfiltrate your keys. Every sensitive action asks permission with a risk badge before it runs, and guardian approvals land in one inbox.
CASA Tier 3 compliance, SOC 2 Type 1 certification, and enterprise workspace scopes for 50,000+ teams.
No terminal, no API keys, no daemon. Voice-first onboarding is the default: your first experience is speaking, not configuring. Free, no credit card, up in minutes.
Add Viktor to your Slack or Teams workspace. Requires workspace admin permissions to install.
Vellum Cloud: 3 GB RAM and 4 GB storage by default. Mac app runs on standard Mac hardware.
Stores indexed company documents and ticket history in Viktor cloud storage, accessible to all authorized team members in Slack.
Every sensitive action asks first with a risk badge, guardian approvals land in one inbox, and you can export or delete your data at any time. The trust model is written down in the docs.
Enterprise-grade compliance with CASA Tier 3 verification, SOC 2 Type 1 certification, and granular Slack channel permission scopes.
See how every personal AI assistant stacks up across the categories that matter.
See how Vellum compares to other AI assistants easily.
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.
Viktor starts at $50/mo per seat and scales across shared enterprise workspaces. Vellum includes free cloud hosting on signup, with personal paid tiers starting at $30/mo (Mighty), $100/mo (Super), and $200/mo (Ultra) that scale with your individual compute and storage needs rather than per-seat seat licenses.
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.
