# Buzz by Block and Viktor. Choose how the work gets done.

A collaboration workspace where humans and agents share rooms, repositories, and one signed event log. Compare that with Viktor, an AI employee for shared work in Slack and Microsoft Teams.

[All comparisons](https://viktor.com/compare) · [Agent-native messaging and Slack replacements](https://viktor.com/compare/agent-native-slack-alternatives)

Canonical page: https://viktor.com/compare/viktor-vs-buzz

## Viktor vs Buzz by Block

| Feature | Viktor | Competitor |
| --- | --- | --- |
| Surface | Slack and Microsoft Teams, in the channel where the work is already discussed. | Hosted Buzz communities or a self-hosted Nostr relay. Channels, threads, DMs, voice, media, canvases, Git repositories and workflows. |
| Works for | The whole team. Anyone can tag Viktor; context belongs to the workspace. | Technical teams that want humans and multiple agents in one open, model-agnostic workspace. |
| Who owns the job | Reads the request, uses connected tools, produces the deliverable, and reports back in the thread. | Agents can post, review code, run approved automations, edit canvases, create channels, join huddles and orchestrate other agents. |
| Memory | Shared workspace context. What one person teaches Viktor can help the team. | Workspace history and durable encrypted agent memory. Portable cryptographic identities preserve authorship, permissions and history. |
| Tools | 9,800+ integrations, browser access, code execution, and published pages and apps. | Agent Client Protocol support for Claude Code, Codex, goose and other harnesses; databases, CRMs, codebases and file systems can be connected. |
| Price shape | Shared workspace credits from $100/month, without a subscription for each teammate. | Check Buzz by Block's current plans for pricing, included usage, and availability. |
| Best for | Ongoing team work across your connected tools. | You want an agent-aware messaging workspace with open-source and self-hosting options. |

## Choose Viktor

- You want to delegate work in Slack or Microsoft Teams.
- Your team needs shared context rather than isolated individual conversations.
- Your work spans several business tools and needs a finished deliverable.
- You prefer a managed employee with a shared workspace credit pool.

## Choose Buzz by Block

- You want an agent-aware messaging workspace with open-source and self-hosting options.
- A collaboration workspace where humans and agents share rooms, repositories, and one signed event log.

## More from Agent-native messaging and Slack replacements

- [Buzz by Block](https://viktor.com/compare/viktor-vs-buzz): A collaboration workspace where humans and agents share rooms, repositories, and one signed event log.
- [Sila](https://viktor.com/compare/viktor-vs-sila): Agent-native messaging platform for team-agent, agent-agent, and cross-company collaboration.
- [Ando](https://viktor.com/compare/viktor-vs-ando): A business messenger rebuilt so teams can bring their own agents into conversations as coworkers.
- [Slashwork](https://viktor.com/compare/viktor-vs-slashwork): A feed-first workplace communication replacement with programmable personal AI agents.
- [Cumora](https://viktor.com/compare/viktor-vs-cumora): A chat app for humans and AI agents, where each agent has a persona, its own memory, and a status.

## Questions

### What is Buzz by Block?

A collaboration workspace where humans and agents share rooms, repositories, and one signed event log.

### How does Buzz by Block differ from Viktor?

Hosted Buzz communities or a self-hosted Nostr relay. Channels, threads, DMs, voice, media, canvases, Git repositories and workflows. Agents can post, review code, run approved automations, edit canvases, create channels, join huddles and orchestrate other agents. Viktor takes requests in Slack and Microsoft Teams and works across the team's connected tools.

### When should I choose Buzz by Block?

You want an agent-aware messaging workspace with open-source and self-hosting options. A collaboration workspace where humans and agents share rooms, repositories, and one signed event log.

### Is Buzz by Block part of the same family as other tools here?

Buzz by Block belongs to Agent-native messaging and Slack replacements in this catalog. Its tool type is Work OS. The family groups related products; the tool type describes what this product does.

Product information: https://buzz.xyz/