> ## Documentation Index > Fetch the complete documentation index at: https://usefulai.com/llms.txt > Use this file to discover all available pages before exploring further. # Best Communication Plugins, Skills, and MCP Servers in 2026 > Research-backed communication plugins, skills, and MCP servers with platform availability and direct setup routes.
Updated July 25, 2026
These extensions let an agent read, summarize, and sometimes act on your email, chat, and meetings. The main decision is how much access to grant: pull in the context you need without handing over broad send or write permissions.
| # | Name | Best for | Est. installs About install estimates | | --------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | | 1 | Gmail | Search, summarize, and draft in Gmail | **510K** | | 2 | Slack | Workspace context and channel digests | **320K** | | 3 | Outlook Email | Inbox search and thread recaps | **300K** | | 4 | Microsoft Teams | Catching up on chats and channels | **300K** | | 5 | Zoom | Meeting intelligence and Zoom apps | **150K** | | 6 | Granola | Decisions buried in meeting notes | **90K** | | 7 | Otter.ai | Searching your Otter transcripts | **75K** | | 8 | Fireflies | Insights from meeting transcripts | **70K** | | 9 | Read AI | Recaps and cross-meeting analysis | **50K** | | 10 | Circleback | Meetings, emails, and calendar context | **15K** |
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Gmail logo
## [Gmail](https://mail.google.com)
Search, summarize, and draft in Gmail
510Kestimated installs
**What it is** Gmail connects an agent directly to your mailbox to search messages, summarize threads, organize mail, and draft replies. It runs through the host's own account connection rather than a separate email server you have to run.
**When to use** It's most useful for meeting prep, follow-ups, and thread summaries, letting the agent work from real email instead of pasted text. Your inbox holds sensitive material, though, and organizations on Team, Enterprise, or Google Workspace plans may need an admin to approve the connection first.
**What you need** Your Google account, connected through the host's own connector.
Install ConnectorPlugin
Slack logo
## [Slack](https://docs.slack.dev/ai/slack-mcp-server/)
Workspace context and channel digests
320Kestimated installs
**What it is** Slack gives an agent working access to a Slack workspace, so it can search past messages, summarize busy channels, and post updates. It also bundles guidance for building Slack apps, standups, and recurring digests.
**When to use** Reach for it when Slack is where your team actually decides things and you want that context in the session without pasting threads by hand. Since it can send as well as read, keep consequential posts under review and grant only the channels a task needs.
**What you need** A Slack workspace your account can access.
Install PluginPluginPluginMCP
Outlook Email logo
## [Outlook Email](https://www.microsoft.com/microsoft-365/outlook/email-and-calendar-software-microsoft-outlook)
Inbox search and thread recaps
300Kestimated installs
**What it is** Outlook Email exposes your mailbox messages and metadata to an agent. It can find specific emails, condense long threads, and pull out the commitments hiding in them, and where enabled it can help with approved replies and mailbox actions.
**When to use** Point it at inbox search, meeting prep, and thread recaps, and let it draft follow-ups from real messages instead of copies. Write actions like shared or delegated mailbox work depend on the granted scopes and your workspace setup, so not every action will be available.
**What you need** Your Microsoft account, via the host's connector.
Install ConnectorPluginMCP
Microsoft Teams logo
## [Microsoft Teams](https://www.microsoft.com/microsoft-teams/group-chat-software)
Catching up on chats and channels
300Kestimated installs
**What it is** Microsoft Teams plugs an agent into your chats and channels. It can read through those conversations and surface the decisions, shared links, blockers, and action items buried in them, so you don't have to scroll back to reconstruct what happened.
**When to use** It's built for catching up: project status, retrospectives, and follow-up drafts pulled straight from team messages. The native routes are read-only, so treat this as a way to search and synthesize conversations, not to send messages or administer Teams.
**What you need** Your Microsoft work account.
Install ConnectorPluginMCP
Zoom logo
## [Zoom](https://openai.com/business/plugins/zoom/)
Meeting intelligence and Zoom apps
150Kestimated installs
**What it is** Zoom splits into two routes under one name. One reaches into meeting intelligence: summaries, transcripts, recordings, decisions, action items, and Chat. The other is a developer toolkit for building and debugging Zoom apps, SDKs, webhooks, and bots.
**When to use** Use the meeting route when you want to prepare for or follow up on calls without watching recordings, and the developer route when you're actually building on Zoom. The meeting side depends on a supported Zoom Workplace plan and the right recording and AI Companion access.
**What you need** A Zoom account; building apps uses the separate developer toolkit route.
Install ConnectorPluginMCP
Granola logo
## [Granola](https://www.granola.ai/)
Decisions buried in meeting notes
90Kestimated installs
**What it is** Granola opens up your meeting notes, transcripts, folders, decisions, and action items to an agent. Instead of hunting through past calls yourself, the agent can search that record while you work and pull the relevant decisions into whatever you're writing.
**When to use** This is the difference between writing a PRD or follow-up from memory and grounding it in what was actually said. The connection is read-oriented but exposes sensitive meeting history, and free Granola accounts can reach only the last 30 days of notes.
**What you need** A Granola account with your meeting notes.
Install ConnectorPluginPluginMCP
Otter.ai logo
## [Otter.ai](https://otter.ai)
Searching your Otter transcripts
75Kestimated installs
**What it is** Otter.ai's official connection, backed by its MCP server, lets an agent search meeting transcripts, summaries, action items, and metadata - finding meetings by date, participants, or topic and reading the full transcript. Claude presents it as a connector; Codex has an Otter.ai-authored app.
**When to use** Use it to make an Otter meeting archive queryable in place: recover a decision, summarize the action items from a recent call, or find every meeting where a topic came up. Search quality tracks the underlying transcript and speaker-attribution quality.
**What you need** An Otter.ai account with your meeting transcripts.
Install ConnectorPlugin
Fireflies logo
## [Fireflies](https://fireflies.ai)
Insights from meeting transcripts
70Kestimated installs
**What it is** Fireflies' official connection lets an agent search your meeting transcripts and pull out the decisions, client concerns, feature requests, and action items in them. Claude presents it as a connector; Codex has a Fireflies-authored app.
**When to use** Reach for it when your recorded meetings are the record you need to work from - reviewing what a call decided, flagging satisfaction risks across client calls, or gathering feature requests from a week of interviews. What it can surface depends on your recording coverage and meeting permissions.
**What you need** A Fireflies account with recorded meetings.
Install ConnectorPlugin
Read AI logo
## [Read AI](https://read.ai)
Recaps and cross-meeting analysis
50Kestimated installs
**What it is** Read AI's official connection gives an agent direct access to your meeting summaries, transcripts, action items, key questions, topics, and engagement data. Claude presents it as a connector; Codex has a Read AI-authored app.
**When to use** Use it to turn recorded meetings into grounded follow-up work - drafting from what was actually said, extracting commitments, prepping the next conversation, or synthesizing themes across several calls. Treat its engagement metrics as product signals, not objective scores of the people in the room.
**What you need** A Read AI account with your meeting history.
Install ConnectorPlugin
Circleback logo
## [Circleback](https://circleback.ai/)
Meetings, emails, and calendar context
15Kestimated installs
**What it is** Circleback opens your meeting notes, transcripts, action items, calendar events, and connected emails to an agent through its official hosted connection. Ask what a past call decided, pull the action items from a client, or find every meeting where a topic came up, all without leaving the session.
**When to use** Reach for it when the context you need is scattered across recorded meetings and threads rather than sitting in one document. The connection is read-oriented but reaches sensitive meeting, email, and calendar data, so connect only the account you mean to expose.
**What you need** A Circleback account with your meeting history.
Install PluginPluginMCP
## Choose by use case

Where does your team actually talk?

→ Slack - search history, summarize busy channels, and post updates (it can send, so keep consequential posts under review)

→ Microsoft Teams - the same catch-up for Teams organizations, read-only

Dictated by your workplace, not chosen.

Working out of your inbox?

→ Gmail - thread summaries, meeting prep, and drafts from your real mailbox

→ Outlook Email - the Microsoft equivalent; write actions depend on the granted scopes

Turning recorded meetings into searchable knowledge?

→ Circleback - meetings and action items plus connected emails and calendar in one search

→ Granola - decisions and action items from the notes you take during calls

→ Zoom - native meeting intelligence if your calls already run on Zoom, plus an app-developer toolkit

→ Fireflies - decisions, client concerns, and feature requests pulled from transcripts

→ Otter.ai - making an existing personal or team Otter transcript archive queryable

→ Read AI - recaps, commitments, and analysis across several meetings

These overlap heavily - pick whichever already records your meetings, since most teams need only one.

## Related categories Meeting notetakers vs revenue tools: notetakers capture what was said, while the CRM, pipeline, and deal tools that act on it live there. The calendars, docs, and task trackers your conversations feed into. General-purpose transcription and speech-to-text APIs, beyond meeting notes.