Tools for several Slack workspaces in ChatGPT or Claude — which one fits you?

Consultants and agencies often join a workspace for each client. ChatGPT supports multiple Slack workspaces; compare the options for your AI and connection needs.

Which tool fits you?

Answer a few questions about how you work. The answer comes after.

Which AI do you use? (pick all that apply)

Does this sound like you?

I have more than one Gmail (work and personal, or several companies) and want the AI to handle them together.
I'm in more than one Slack workspace.
I use several AIs and do not want to repeat the same explanations
My email is Outlook / Microsoft 365.
I want the AI to remember things without being asked (what we decided, past conversations).
I'm a developer and happy to run my own server.

Pick the AI you use first.

The tools side by side

One row per tool. Each column says how many accounts of that service you can use at once. Sources are listed under the table.

Multiple= several accounts at onceOne= one at a timeConnects= connects (number of accounts not stated)—= not supported, or not on the vendor's pagePrice = lowest paid tier on the vendor's pricing page

Scroll sideways to see every service →

Tool	Gmail	Outlook	Slack	Calendar

Good to know

ChatGPT: add another Slack workspace from the app settings. Eligible plans, regions and workspace permissions apply.
Claude: the official connector supports Slack, but its simultaneous connection count is not stated.
Slack Enterprise Grid organisations can use ChatGPT's workspace agents across workspaces — a separate business feature.
A multi-account tool keeps every workspace connected and searches them together.

Other comparisons

For developers: tools you run yourself

If you are comfortable running a server or wiring up tools yourself. Most people do not need these.

Scroll sideways to see every service →

Tool	For	Gmail	Slack	Runs as	Price
ExecutorNotion, GitHub, Jira and any OpenAPI / GraphQL / MCP sourceLicense: MIT	Claude Code, Cursor, ChatGPT	Connects (count not stated)	Connects (count not stated)	Cloud, Desktop, CLI, Self-hosted	Free · paid $15/user/mo+

ChatGPTbuilt-in apps	Multiple	Not supported or not stated	Multiple	Multiple	Connects^Note1	Not supported or not stated	Per AI only	All plans^Note2
Claudebuilt-in connectors	Connects^Note1	Connects^Note3	Connects^Note1	Connects^Note1	Connects^Note1	Connects^Note1	Per AI only	All plans^Note4
AccountHub	Multiple	Not supported or not stated^Note5	Multiple	Multiple	Multiple^Note6	Multiple	Shared	Free
Composio For You	Multiple	Multiple	Multiple^Note7	Multiple^Note7	Multiple^Note7	Multiple^Note7	Not supported or not stated	Free · paid $29/mo+
Carly	Multiple	Multiple	Connects^Note1	Multiple	Connects^Note1	Connects^Note1	In-app only	Free · paid $35/mo+