---
title: "Best Slack Broadcast Tools (2026) | Threadly"
description: "The ways to send one Slack message to many channels, compared: Threadly, Slack Workflow Builder, Zapier and posting by hand. What each is good at and when to use it."
url: "https://www.trythreadly.com/compare/best-slack-broadcast-tools"
---

Slack broadcast tools, compared

# The best ways to send one Slack message to many channels

You can post in each channel by hand, build a workflow in Slack Workflow Builder, set up a Zap in Zapier, or use a broadcast tool like Threadly, which sends to channels, segments or DMs at once and shows who responded.

[Get started free](https://slack.com/oauth/v2/authorize?client_id=2573203509911.7020858675504&scope=channels:history,channels:join,chat:write,chat:write.customize,commands,files:read,groups:history,reactions:read,team.billing:read,team:read,users:read,users:read.email&user_scope=channels:read,channels:write.invites,chat:write,groups:read,groups:write.invites,im:write,mpim:read,mpim:write) [Book a demo](https://cal.com/zev-zoldan/threadly-connect)

![Composer delivery step: send to channels, a segment or direct messages, with a bot profile or your own Slack account](https://www.trythreadly.com/product/composer-delivery.webp)

## What each option is good for

### Threadly

-   Sends to many channels, a CRM segment or DMs in one go
-   Works in customer and partner Slack Connect channels
-   Adds forms and booking buttons, and tracks who responded

### Slack Workflow Builder

-   Built into Slack
-   Good for automating internal processes
-   A fit if you already use it for the rest of your workflow

### Zapier

-   Connects thousands of apps
-   Good when Slack is one step in a longer workflow
-   A fit if your team already runs on Zaps

### Posting by hand

-   No setup
-   Fine for two or three channels
-   Gets slow as the channel list grows

## What a broadcast looks like in Threadly

Write the update once, pick channels, a segment or people, and every recipient gets their own message with working buttons.

ChannelsSegmentDirect messages

N

Northwind Customer SuccessAPP

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We just shipped SSO for every plan and a faster analytics view.

Read the release notesBook a walkthrough

-   customer-acmeAcme Corp · Slack ConnectDelivered
-   customer-globexGlobex · Slack ConnectDelivered
-   customer-initechInitech · Slack ConnectDelivered
-   customer-umbrellaUmbrella · Slack ConnectDelivered

## Side by side

Threadly

Workflow Builder

Zapier

By hand

What it is

An app for Slack that sends messages to many channels

Slack’s built-in automation tool

An automation platform for connecting apps

Posting in each channel yourself

Best at

Updates, surveys and invites to many channels and people

Internal processes like approvals and requests

Moving data between apps

A few channels, once in a while

Where you use it

In Slack, the Threadly web app, or through the Threadly API and MCP server

In Slack

In the Zapier editor, or through Zapier’s API and MCP server

In Slack

## What Threadly adds

-   ### One send, many channels

    Pick channels, a saved segment or people, and each gets its own copy of the message.

-   ### Customer and partner channels

    Send to Slack Connect channels shared with customers and partners, from your workspace.

-   ### Audiences from your CRM

    Segments built from HubSpot, Attio or Clay fields that update as your data changes.

-   ### Forms inside Slack

    A button opens a form as a Slack modal: text, dropdown, date and multi-select fields.

-   ### Meetings booked in Slack

    Calendly, Cal.com, SavvyCal or HubSpot meetings, booked from a button in the message.

-   ### Who responded

    Clicks, replies and form responses by channel and by person, for every send.

## Frequently asked questions

What is a Slack broadcast tool?

A tool that sends one message to many Slack channels or people at once, instead of posting in each channel by hand. Good ones also add buttons and forms and show who responded.

What should I look for in a Slack broadcast tool?

Sending to many channels or a segment at once, Slack Connect support, personalization, buttons and forms people use inside Slack, CRM targeting, and tracking on who responded.

Which Slack broadcast tool is best for customer channels?

For customer and partner Slack Connect channels, Threadly is built for the job: it sends to every shared channel at once, targets accounts from your CRM and shows which accounts responded.

[See all comparisons](https://www.trythreadly.com/compare)

## Send your next update to every channel

Add Threadly to Slack, pick your channels and send once. Free to start.

[Get started free](https://slack.com/oauth/v2/authorize?client_id=2573203509911.7020858675504&scope=channels:history,channels:join,chat:write,chat:write.customize,commands,files:read,groups:history,reactions:read,team.billing:read,team:read,users:read,users:read.email&user_scope=channels:read,channels:write.invites,chat:write,groups:read,groups:write.invites,im:write,mpim:read,mpim:write) [Book a demo](https://cal.com/zev-zoldan/threadly-connect)