Jack Dorsey’s Buzz Is Built for Developers. Zynito Chat Is Built for Agencies.

Jack Dorsey Buzz launched on July 21, and it’s already being framed as a Slack and GitHub replacement. The Buzz app is genuinely interesting, so the natural next question is whether it actually fits how an agency works day to day.

Jack Dorsey’s Block released Buzz, a free, open-source group chat platform built to reduce dependence on Slack and GitHub. It puts human team members and AI agents in the same channels, runs on the decentralized Nostr protocol, and ships as a desktop app for macOS, Windows, and Linux.

It’s a genuinely interesting product. It’s also solving a different problem than the one most agencies actually have.

What Buzz is built for

Buzz is a developer tool first. The Buzz vs Slack framing misses the more useful comparison for most businesses: Buzz vs whatever your team already uses for client-facing work. The pitch is collapsing chat and code hosting into one window, so engineering teams stop juggling Slack for conversation and GitHub for code. AI agents get their own identities and audit trails instead of generic bot tokens, a real answer to a real security question: an agent sitting in a channel can read everything in that channel.

That focus makes sense for Dorsey’s audience, but it’s built around a different set of problems than the ones agencies run into day to day.

Is Buzz for Agencies the Right Fit?

Agencies don’t just collaborate internally. They work across clients, freelancers, partner agencies, and stakeholders, often all at once. The challenge isn’t sending messages, it’s keeping those conversations connected to the work being delivered and separated by client without things bleeding into each other.

Here’s what that looks like in practice. Imagine managing 18 client accounts. Each one has its own conversations, files, tasks, and occasional external collaborators brought in for a specific project. Multiply that by however many account managers are doing the same thing at once, and the bottleneck stops being “can we message each other fast enough.” It becomes “can anyone find the right conversation, with the right client, without also exposing it to the wrong one.” That’s a workspace and permissions problem, not a messaging-speed problem, and it’s the part general-purpose chat tools tend to ignore.

That’s the specific gap Zynito Chat is built to close, as team chat for agencies rather than agency collaboration software borrowed from a developer team’s playbook.

Where Zynito Chat for Agencies Is Different

Messaging built for a lot of parallel conversations, not one

Channels, threads, and direct messages with search that actually works when you’ve got a dozen client accounts active at once, so finding a message means searching by client or workspace, not scrolling.

Client Portal

A client can be added directly to the relevant conversation, with a controlled window into just that thread, without being handed a login to your internal workspace.

Partner Company connections

Agencies subcontract to other agencies constantly. External Channel Connections let two separate workspaces share a conversation thread without merging accounts or pulling an entire outside team into your workspace.

AI Assistant

Built directly into the chat window, with grammar correction, tone adjustment, rewrite suggestions, and translation, aimed at cleaning up and localizing client-facing messages in the moment, rather than at agent-to-agent task execution.

One login, every client workspace

Move between client accounts and partner workspaces without logging in and out of separate ones, a basic requirement once you’re past a handful of clients.

Buzz vs Zynito Chat at a glance

Capability	Buzz	Zynito Chat
Primary audience	Developer teams	Agencies managing multiple clients
AI participation	AI agents as channel participants	AI Assistant: grammar, tone, rewrite, translate
Client Portal	No	Yes
Multi-workspace management under one login	No	Yes
Partner agency collaboration across workspaces	No	Yes (External Channel Connections)
Open source	Yes	No
Pricing	Free	Free plan available; paid plans from $4.99/seat/mo

Where Buzz has the edge

Worth saying plainly: Buzz is free and open source, and Zynito isn’t. If a team’s core need is genuinely developer-centric, chat tightly coupled to a Git workflow, self-hosting, model-agnostic agents, Buzz is a legitimate option and probably the better one. It also has a well-known founder and a fast-moving launch behind it, which counts for a lot in early adoption.

The real takeaway

Buzz is a strong signal that agents as participants in shared channels is becoming a category every collaboration tool will be judged on, not just a feature. That’s worth agencies paying attention to. But the launch itself is aimed at developer teams cutting Slack and GitHub out of their stack, not at agencies trying to run client conversations, partner collaborations, and client-facing communication out of one place.

The real question isn’t which tool wins on features. It’s whether your biggest collaboration challenge looks like a software team’s, or an agency’s.

If your team spends more time switching between Slack, task tools, email, and client chats than actually delivering work, see how Zynito Chat keeps client conversations, partner collaboration, and client visibility in one workspace, built for agencies from day one.

Zynito Chat also pairs with Zynito Projects for teams who want project management in the same workspace.