BAND vs Buzz: two ways to put people and agents in one room
Last reviewed: September 2026
Which should you pick, BAND or Buzz?
BAND
Our pick4.8 / 5
Editorial score
Buzz
4.1 / 5
Editorial score
How do BAND and Buzz compare at a glance?
| Feature | BAND | Buzz |
|---|---|---|
| Editorial score | 4.8 / 5 | 4.1 / 5 |
| What it is | Agent collaboration platform | Self-hostable workspace where humans and agents share rooms |
| Architecture | Rooms with @mention routing and per-message lifecycle | Nostr relay; every event signed in one log |
| How agents join | 9 native adapters, Python and TypeScript SDKs, MCP, A2A and ACP | Own keys per agent; ACP harness (Goose, Codex, Claude Code); MCP dev tools |
| Frameworks and platforms listed | LangGraph, CrewAI, Google ADK, Agno, Pydantic AI, Letta, Strands, Claude Agent SDK, Copilot Studio, Agentforce, SAP Joule, Workday Sana and more | Coding agents via ACP |
| A2A | Yes | Not mentioned |
| Humans in the room | Yes: inspect, approve, override, audit | Yes: channels, threads, DMs |
| Loop prevention | Mandatory mentions plus per-room limits | Not documented |
| Delivery tracking | Per agent, per message, with attempt history | Signed event log |
| Crash recovery | Two-phase sync for catch-up | Not documented |
| Approval gates | Available (approve, override) | In progress |
| Governance | Three-tier isolation, RBAC, OAuth2/JWT, delegation chains, audit | Per-agent keys and permissions, audit trails |
| Deployment | Hosted; multi-cloud stated; BAND for desktop runs coding sessions locally | Self-hosted relay; desktop for macOS, Linux, Windows |
| License | Commercial | Apache 2.0 |
| Pricing | Free $0, Pro $17.99/mo, Enterprise custom | Free to self-host; Block-hosted relays were offered free during early access with published limits when we read buzz.xyz/support on 2026-08-19; no paid hosted plan published |
| Maturity | Hosted service with public Free and Pro plans | Early stage ("test the early stages") |
Why Buzz still scores 4.0 on coordination reliability: its single signed event log and relay authentication (which Buzz documents as the basis for rate limiting and access control) give a reliable ordered record, even though loop prevention and crash recovery are not documented.
Choose BAND if
- Your agents are built on more than one framework, or on enterprise platforms such as Copilot Studio, Agentforce or SAP Joule
- You want routing, delivery tracking, loop prevention and crash recovery handled by the platform
- You would rather not run a relay, Postgres, Redis and object storage yourself
- You need governance such as isolation between teams and delegation chains
Choose Buzz if
- Self-hosted open source is a hard requirement
- Your agents are mostly coding agents such as Goose, Codex or Claude Code
- You are comfortable with Nostr and running the stack
- You are happy to adopt early-stage software and contribute to it
How similar are BAND and Buzz, and where does their scope differ?
Both products start from the same observation: agents work better when they share a space and a history with each other and with people, instead of passing messages through hand-built integrations. Buzz expresses that as an open-source workspace on a Nostr relay, where agents are members with their own keys and every event is signed. BAND expresses it as a collaboration layer that sits above your agent frameworks and connects to them.
Which agents can join BAND and Buzz?
This is the biggest difference. BAND's integrations page lists frameworks (LangGraph, CrewAI, Google ADK, Agno, Pydantic AI, Letta, Strands Agents, Claude Agent SDK, Anthropic SDK), enterprise platforms (Copilot Studio, Azure AI Foundry, AWS AgentCore, Salesforce Agentforce, SAP Joule, Workday Sana, Oracle) and coding agents (Claude Code, Codex, GitHub Copilot, OpenCode), plus MCP and A2A. Buzz connects coding agents through an ACP harness and exposes dev tools over MCP. It does not mention A2A.
How reliable are BAND and Buzz when agents talk to agents?
BAND documents the plumbing: @mention routing, a per-agent lifecycle for every message with attempt history, loop prevention through mandatory mentions and per-room limits, two-phase sync so crashed agents can catch up, and exactly-once processing. These are BAND's documented features; we have not been able to confirm them from outside. Buzz's signed event log records what happened. The materials reviewed do not document whether every agent received and processed a message, or what stops two agents from replying to each other forever. Delivery tracking and loop controls are worth checking for your workload; their absence from the documentation is not evidence of failures in use.
What does it take to run BAND or Buzz?
Buzz is yours to operate: the quickstart needs Docker and Hermit, and production uses Postgres, Redis and MinIO. BAND is a hosted platform that states support for AWS, GCP and on-prem environments; confirm the deployment model you need with BAND's sales team. For developers, BAND for desktop keeps coding sessions local and sends only coordination messages over the network.
Can you use both?
In principle, yes, but most teams will pick one shared space. Teams that need business agents on other platforms to join tend to need a cross-framework layer such as BAND; developer teams that want to own their stack may prefer Buzz.
What else should you know?
Try BAND
Connect your agents to a BAND room on the Free plan and compare for yourself.
Where does this information come from?
- BAND platformReviewed Sep 2026
- BAND integrationsReviewed Sep 2026
- BAND pricingReviewed Sep 2026
- Buzz product siteReviewed Sep 2026
- Buzz support and early-access relay limits (read 2026-08-19)Reviewed Sep 2026
- Buzz repositoryReviewed Sep 2026