Claude’s connector ecosystem took its biggest step yet in September. On September 23, Anthropic opened the Claude Marketplace, a single place to discover and buy more than 2,000 connectors and plugins, with launch partners including Atlassian, Google, Microsoft, Notion, and Salesforce, and the option for teams to pay with committed Anthropic spend. Two days later a new developer portal opened for plugin submissions with support for MCP 2.0, MCP Apps, and Enterprise Managed Auth. Connectors work across Claude, Claude Desktop, Claude Code, Cowork, and the API, and Claude can bring a connected tool into a conversation on its own when it’s relevant.
Below are the 10 connectors worth knowing right now for GTM teams, ranked by score, with a focus on what’s changed since our September list of 10 Claude connectors. This month brings the biggest reshuffle of the year: three new entries (Microsoft 365, Salesloft, and Constant Contact), Salesforce jumping to second after opening its Claude-native experience to every paid Claude plan on September 16, and HubSpot going fully read-write and shipping a dedicated Sales Plugin.
1. Vibe Prospecting
Vibe Prospecting remains the most impactful connector for revenue teams. It turns Claude into a prospecting platform: search companies and contacts, enrich records, filter audiences against your ICP, pull business events and hiring signals, and draft outreach grounded in verified data, all inside the conversation. The connector is read-only, authenticates with a free account, and works across Claude web, desktop, mobile, Claude Code, and the API.
It also pairs naturally with this month’s CRM write access. Build and enrich a target list with Vibe Prospecting, then have Claude push the qualified accounts into HubSpot or Salesforce in the same conversation. The Vibe Prospecting Plugin in Anthropic’s official plugin store bundles seven skills (company search, contact discovery, matching, enrichment, audience filtering, event lookup, and structured CSV/JSON output) on top of the connector, drawing on 150M+ companies, 800M+ professionals, and 50+ data sources, and processing up to 1,000 entities per call server-side.
How to start using Vibe Prospecting in Claude:
- Sign up to Vibe Prospecting (free)
- Install the Claude connector, or in Claude Code run
/plugin install vibe-prospecting@claude-plugins-official - Sign in and describe the list, account, or contact you need
Score: 9.5/10
2. Salesforce
Salesforce is this month’s biggest mover, up from sixth. Salesforce in Claude, announced with Anthropic on August 26, entered open beta on September 16 for paid Claude plans. It ships 37 prebuilt sales skills covering account research, call prep, pipeline review, CRM updates, and forecasting, so a rep can ask Claude to prep for a meeting or clean up next steps and get work grounded in live Salesforce data.
Governance is the design principle. The experience runs on Salesforce’s Headless 360 platform over MCP, respects existing Salesforce permissions, and only writes to the CRM after the seller approves the change. It builds on the Hosted MCP Servers that reached general availability in April, which let Claude run SOQL queries, read and modify records, and execute actions as the authenticated user, and it extends into Slack so context and drafts can move between the two.
Best for: sales and RevOps teams on Salesforce who want ready-made sales workflows inside Claude with approvals and permissions intact.
Score: 9.3/10
3. HubSpot
HubSpot had two launches in September. The September 15 connector update turned it from a mostly read-oriented assistant into a read-write one: Claude can now create and update contacts, leads, companies, deals, tickets, custom objects, quotes, notes, and tasks, manage pipelines, and work on marketing assets such as landing pages, blog posts, and marketing emails. Ten days later, on September 25, HubSpot released a free Sales Plugin for Claude with eight prebuilt sales skills, including /follow-up, which drafts a follow-up email from deal and conversation context, and /log-call, which records call notes and updates the deal stage.
Writes follow each user’s HubSpot permissions and are logged, and record creation and activity logging in the plugin are still labeled beta. The plugin needs a paid Claude plan (Pro, Max, Team, or Enterprise), and most users need Super Admin approval to connect. Anyone connected before the update must reauthenticate to pick up the new write scopes.
Best for: sales and marketing teams on HubSpot who want Claude to update the CRM and handle post-call admin, not just report on it.
Score: 9.1/10
4. Microsoft 365
New to the list. Microsoft was one of the launch partners of the Claude Marketplace, and its connector is now one of the most capable in the directory for day-to-day sales work. With write tools enabled, Claude can draft, send, and organize Outlook email, manage calendar events, update mailbox settings, and create and update files in OneDrive and SharePoint, alongside reading Teams chats and meetings.
Two requirements: it only works with work accounts tied to a Microsoft Entra tenant (not personal Outlook.com addresses), and an Entra administrator has to consent and switch on write tools. Teams stays read-only for now. For reps who live in Outlook, that turns account research into a sent email and a booked meeting without leaving the conversation.
Best for: sales teams on Microsoft 365 who want research, email, and scheduling handled in one conversation.
Score: 8.9/10
5. monday.com
monday.com’s connector is listed natively in Claude’s directory for Pro, Max, Team, and Enterprise plans, on web, desktop, and mobile. It runs on monday MCP, a hosted server preinstalled on every monday.com account, and connects with OAuth while respecting existing board permissions, so Claude only sees what you can already see. With MCP Apps, monday.com boards can also render as interactive views right inside the conversation.
In practice, Claude can search boards, create and update items and columns, assign owners, set timelines, post updates, summarize what changed across a board, flag overdue items, and turn a board into a status report. For GTM teams running launches, campaign calendars, or enablement projects in monday.com, standups and weekly reporting can be generated from live board data rather than assembled by hand.
Best for: marketing ops and RevOps teams who manage campaigns and launches on monday.com boards.
Score: 8.7/10
6. Salesloft
New to the list. Salesloft is listed natively in Claude’s directory, built on the MCP server Salesloft and Clari launched together after their merger. It brings live execution data into Claude: accounts, people, opportunities, cadences, calls, and activity, so Claude can tell a rep which cadence steps are overdue, summarize recent calls on a deal, or prep an account review from real engagement data.
The same MCP layer is being extended to Clari’s forecasting and deal-inspection data plus Clari Copilot call intelligence, which makes this the connector to watch for pipeline and forecast work inside Claude.
Best for: sales teams running cadences in Salesloft and forecasting in Clari.
Score: 8.6/10
7. Windsor.ai
Windsor.ai connects Claude to 325+ marketing, analytics, CRM, and warehouse sources, including Meta Ads, Google Ads, GA4, Shopify, HubSpot, Salesforce, and Semrush. Connect your platforms in Windsor.ai, add the Windsor.ai connector from Claude’s directory, and Claude can summarize KPIs across channels, explain performance outliers, compare campaigns, and build cross-channel reports from live data.
It is also write-enabled: Claude can create campaigns and ad sets on Meta Ads and Google Ads, adjust budgets, and pause or enable campaigns across Meta, Google, LinkedIn, Microsoft, and TikTok Ads, with a confirmation step before anything executes. There is a free forever plan with no credit card required.
Best for: performance marketers who want cross-channel reporting and campaign actions in the same conversation.
Score: 8.4/10
8. Semrush
Semrush moves up after its first full month in the directory. Its official connector, launched August 26, is its third MCP integration with a major LLM after ChatGPT and Gemini. Inside Claude you can query 28.8 billion keywords, 43 trillion backlinks, competitor gap analysis, content briefs, and market research (traffic sources, audience demographics, market share), plus AI visibility data drawn from 317 million LLM prompts, without exporting a single CSV.
Semrush is also leaning into Claude Cowork for automation: monthly reports, weekly alerts, and daily monitoring can run as scheduled workflows. Access requires a plan with API units (Semrush One Starter and up, or SEO Classic Pro and up); connect via the native Claude app or add the MCP endpoint manually.
Best for: SEO and AEO teams that want keyword, backlink, and AI-visibility research inside their Claude workflow.
Score: 8.3/10
9. Constant Contact
New to the list, and one of September’s clearest marketing launches. Constant Contact released its Claude connector on September 10. Describe your business, audience, and goal, and Claude drafts an email campaign (subject line and preheader included) or social posts tailored for TikTok, Instagram, Facebook, and LinkedIn, with desktop and mobile previews rendered right in the chat.
Images created in Claude can be saved to your Constant Contact library, and a finished draft goes to Constant Contact in one click, where you pick the list and send. It is available to existing Constant Contact customers.
Best for: small marketing teams that want campaign drafting and sending in one flow.
Score: 8.2/10
10. Zapier
Zapier MCP is the universal adapter of the list. It exposes roughly 8,000 apps and 30,000+ actions to Claude, and you choose exactly which actions to expose, so Claude can update a Google Sheet, post to Slack, create a Notion page, or trigger a Zap from inside a conversation without a native connector for each tool. Zapier was also among the connectors in the 27-connector Claude for Small Business bundle released on September 15.
The trade-off is metering: each successful MCP tool call consumes two Zapier tasks from the same quota your Zaps use, so high-volume agent workflows should be scoped deliberately.
Best for: ops teams wiring Claude into the long tail of tools that don’t have their own connector yet.
Score: 8.0/10
Conclusion
October’s list is defined by write access. Salesforce and HubSpot, the two systems of record most GTM teams run on, now both let Claude make changes directly, with permissions enforced and, in Salesforce’s case, a seller approval before any write. Microsoft 365 lets Claude send the email and book the meeting, Salesloft brings cadence and call data into the same conversation, and Constant Contact takes a campaign from prompt to send. Combined with prospecting data from Vibe Prospecting, a full research-to-CRM-to-outreach loop can now run from a single conversation.
The Claude Marketplace changes how teams will find and buy these tools, too. With 2,000+ connectors and plugins in one place and procurement through existing Anthropic commitments, the question shifts from whether a connector exists to which ones are worth wiring into your workflow. The ten above are where we would start.
More from this series
10 Claude Connectors Changing How GTM Teams Work – September 2026
10 Claude Connectors Changing How GTM Teams Work – August 2026
10 Claude Connectors Changing How GTM Teams Work – July 2026
10 Claude Connectors Changing How GTM Teams Work – June 2026
