# Vellum vs Viktor
> Personal AI assistant vs AI employee platform
> Last updated: June 16, 2026
> Comparison: https://www.vellum.ai/compare-assistants/vellum-vs-viktor

## Overview
Vellum is a personal AI assistant that runs as a native Mac app on your machine or in Vellum Cloud, with iOS, web app, voice, email, Telegram, Slack, and Microsoft Teams surfaces that share one memory. Viktor is a cloud-based AI employee platform built by Zeta Labs that runs inside Slack and Microsoft Teams, designed for team-level task execution across business workflows.

## The contenders
### Vellum
Website: https://vellum.ai

Vellum is a voice-first personal AI assistant that learns how you work and can improve itself around your habits. Its companion works alongside you in real time, or takes on longer tasks in the background. It follows you across devices and apps with one shared memory, and can run in Vellum Cloud or on your own machine.

Why choose Vellum:
- Model agnostic: Use any frontier AI model, open or proprietary, and switch anytime.
- Truly yours: Give it a name and personality. It learns you, your work, and your tools.
- Self-improving: Gets better the more you use it, with one memory across every device.
- Private by design: Credentials stay secure, and you choose where your data lives, including self-hosting.
- Built for busy business owners: Offload work and make more time for life.

### Viktor
Website: https://viktor.com

Viktor is a cloud-based AI employee platform from Zeta Labs that operates inside Slack and Microsoft Teams. It connects to 3,200+ business tools and executes tasks at a team or workspace level.

Why choose Viktor:
- Lives inside Slack and Teams, so no new app to install for existing Slack-heavy teams
- 3,200+ tool integrations covering a wide range of business workflows
- Free tier with $100 in credits and no credit card required
- Designed for team-level task delegation, not just individual use

## The scorecard

### channels

Vellum: 9 surfaces, one memory
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.
Vellum runs natively on Mac and iOS with Home Screen widgets, plus web app, voice, email, Slack, Telegram, Microsoft Teams, and Discord. Sent messages can be edited in place in Slack and Telegram. Every surface shares the same memory, so you can start a task on your Mac and pick it up on your phone or in a chat.

Viktor: Slack and Teams only
Viktor lives inside Slack and Microsoft Teams. No native Mac app, iOS app, web app, voice, or email surface.
Viktor is available exclusively inside Slack and Microsoft Teams. There is no native Mac app, iOS app, web app, voice interface, or email surface. Reaching Viktor outside of those two platforms is not possible.

### execution

Vellum: One sentence to real output
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.

Viktor: SaaS automation across 3,200+ tools
Executes business actions directly inside Slack and Teams across 3,200+ enterprise integrations, from CRM updates to ticket routing.
Viktor connects directly to 3,200+ SaaS applications via API connectors, executing business tasks within Slack and Microsoft Teams threads. It specializes in structured team workflows rather than general desktop or web browsing.

### hosting

Vellum: On-device, managed cloud, or self-hosted
Run on-device as a native Mac app, on Vellum's managed cloud, or self-host on your own VPS.
Vellum gives you the full range: run the native Mac app entirely on your own hardware, use Vellum Cloud for managed uptime and cross-device sync, or self-host on your own VPS for full infrastructure control.

Viktor: Cloud-only, hosted by Viktor
Viktor is fully cloud-hosted with no on-device or self-host option.
Viktor runs exclusively on Viktor's cloud infrastructure. There is no on-device runtime, no self-host path, and no option to run it on your own VPS or hardware.

### integrations

Vellum: 50+ managed OAuth integrations
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.
Vellum connects to 50+ services through managed OAuth: Google, Slack, Notion, GitHub, Linear, Calendly, Eventbrite, and more. Your assistant acts in real services on your behalf without you handling tokens or API keys.

Viktor: 3,200+ business tool integrations
Viktor connects to 3,200+ tools, primarily business and team software, through its Slack and Teams interface.
Viktor offers a wide integration surface of 3,200+ tools aimed at business workflows. Integrations are accessed through the Slack or Teams interface. The breadth is notable for team use cases but is tied to those two platforms.

### memory

Vellum: Structured memory that builds itself, everywhere
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.
Vellum builds a structured memory graph of your projects, people, and preferences across every surface. It sharpens over time through use and explicit corrections, so each conversation picks up where the last left off.

Viktor: Workspace-scoped thread context
Context is scoped to Slack threads and workspace history, not to you personally.
Viktor retains context within Slack or Teams threads and can reference workspace history. Memory is shared across the workspace rather than personal to each user, and does not persist or compound at the individual level.

### modularity

Vellum: Adapts 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.
Vellum adapts at the individual level: it learns your communication style, builds custom skills from your instructions, and updates its behavior based on your feedback. Each assistant is shaped by the specific person using it.

Viktor: Team-level task configuration
Configured at the workspace level for team workflows, not tuned to individual users.
Viktor is configured at the Slack or Teams workspace level to support shared team workflows. It does not build a personal model of each individual user's preferences, tone, or working style.

### open-source

Vellum: Open source under MIT
Open source under MIT license. Full codebase available on GitHub.
Vellum is open source under the MIT license. The full codebase is on GitHub and can be self-hosted, audited, and extended.

Viktor: Closed source, proprietary
Viktor is a closed-source proprietary platform. No public codebase or self-host option.
Viktor is a closed-source commercial product. There is no public repository, no self-host path, and no ability to audit or extend the codebase.

### pricing

Vellum: Free Base, paid from $30/mo
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.
Vellum offers a free Base plan with credits to start. Paid plans run from $30/mo (Mighty) to $100 (Super) and $200 (Ultra) with pay-as-you-go credits, configurable compute and storage, and a personal assistant email and subdomain on higher tiers.

Viktor: Free with $100 credits, from $50/mo
Free tier includes $100 in credits with no credit card required. Paid plans start at $50/mo.
Viktor offers a free entry tier with $100 in credits and no credit card required. Paid plans start at $50/mo. Pricing scales with usage across the workspace, and costs can compound quickly for teams running Viktor at volume.

### privacy

Vellum: Local or cloud, always yours
Run locally on Mac, in Vellum Cloud, or self-host. Vellum never has access to your data on any deployment path.
Vellum gives you three deployment paths: native Mac app on your own hardware, Vellum Cloud with per-customer isolation, or self-hosted on your own infrastructure. On every path, Vellum never has access to your data.

Viktor: Cloud-only, shared workspace context
All conversations run through Viktor's cloud. No self-host option. Workspace context is shared among team members.
Viktor is cloud-only with no self-hosted deployment path. Conversations and task history flow through Viktor's infrastructure. Workspace context is shared across team members by design, so individual conversations are not private from colleagues.

### schedules

Vellum: Built-in scheduling, always running
Built-in scheduling for daily briefings, weekly reports, and hourly checks that just run on a cadence.
Vellum has native scheduling for recurring tasks: daily briefings, weekly reports, hourly checks. Scheduled tasks run in the cloud whether or not you have a session open.

Viktor: Slack-based task scheduling
Viktor can execute scheduled tasks inside Slack. Scheduling is tied to the Slack workspace context.
Viktor supports scheduled and background task execution within Slack. Recurring jobs run through the Slack interface, so scheduling capabilities are limited to what can be surfaced inside that platform.

### security

Vellum: Isolated credential vault
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.
Vellum stores every connected service credential in an isolated vault that never touches the LLM inference layer. Prompt injection attacks cannot reach your API keys or OAuth tokens.

Viktor: CASA Tier 3 verified and SOC 2 Type 1 certified
CASA Tier 3 compliance, SOC 2 Type 1 certification, and enterprise workspace scopes for 50,000+ teams.
Viktor holds official CASA Tier 3 compliance and SOC 2 Type 1 certification, securing integrations across 3,200+ business tools for more than 50,000 corporate teams. Credentials and workspace logs are managed within Viktor enterprise cloud infrastructure.

### setup

Vellum: Sign up and start talking
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.
Vellum setup is sign up and start talking. Create an account and your first sentence gets real output. Voice is the default first experience. No terminal, no config files, no API keys, no infrastructure to provision.

Viktor: Slack or Teams add-on install
Add Viktor to your Slack or Teams workspace. Requires workspace admin permissions to install.
Viktor is added to an existing Slack or Teams workspace. Installation is quick for admins, but individual users cannot self-serve the setup without workspace admin access. Users outside those platforms have no onboarding path.

### storage

Vellum: Storage
Vellum Cloud: 3 GB RAM and 4 GB storage by default. Mac app runs on standard Mac hardware.

Viktor: Cloud workspace document storage
Stores indexed company documents and ticket history in Viktor cloud storage, accessible to all authorized team members in Slack.
Viktor maintains cloud-hosted knowledge storage where team documents, ticket histories, and conversation context are indexed for retrieval across Slack and Teams workspaces.

### trust

Vellum: Permissions you can see
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.

Viktor: CASA Tier 3 and SOC 2 Type 1 certification
Enterprise-grade compliance with CASA Tier 3 verification, SOC 2 Type 1 certification, and granular Slack channel permission scopes.
Viktor has achieved CASA Tier 3 security compliance and SOC 2 Type 1 certification, providing robust enterprise assurances for corporate teams. Data and credentials are fully hosted in Viktor cloud infrastructure.

## Where they split

### Which one is right for you?
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.

### Which setup fits you best?
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.

### How do you want privacy and security handled?
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.

## Lingering questions

### When should I choose Vellum over 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.

### When does Viktor make more sense than Vellum?
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.

### How does Viktor pricing compare to Vellum?
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.

### How hard is it to set up Viktor compared to Vellum?
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.

### Does Viktor remember things between conversations?
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.

### What services can Viktor connect to vs Vellum?
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.

### Can I use Viktor on my iPhone or Mac outside of Slack?
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.

### Who holds my data when I use Viktor?
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.

### Is Viktor open source?
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.

### Can I use Viktor and Vellum at the same time?
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.

### Is Viktor good for individual users or is it built for teams?
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.

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Full comparison index: https://www.vellum.ai/compare-assistants
Try Vellum: https://www.vellum.ai