Send Research has published a Q2 2026 benchmark of the 11 first-party GTM data and enrichment connectors in Anthropic's connector directory, tracked weekly from late April through June.
In this independent analysis, ZoomInfo ranked #1 in popularity among GTM connectors every single week of the tracking window - ahead of Apollo.io, Clay, and eight other providers, across a full quarter of measurement.
Weekly rank by popularity within the set, W1–W9; popularity is the directory's own adoption score, the closest public signal to how widely each connector is actually used. Sumble and Phoenix enter mid-quarter as they join the directory.
What the Benchmark Tracked
The methodology is published in full. Rankings are built on Anthropic directory popularity scores - 3,610 snapshots specific to these 11 GTM providers, drawn from a broader pool of more than 100,000 snapshots across the full Anthropic directory.
The scores measure adoption: what go-to-market teams are actually connecting their agents to, week over week. ZoomInfo didn't just lead - it led wire-to-wire, with no other provider closing the gap at any point in the quarter, while Apollo.io and Clay traded the #2 and #3 positions beneath it.
Why Adoption Is the Signal Worth Watching
Frontier models are exceptional at reasoning. They're constrained by what they can access. That's the real bottleneck in agentic go-to-market - not whether an agent can think, but whether it has something accurate and current to think about.
B2B contact data decays quickly; industry estimates commonly cited across the data-quality space put annual contact-data decay at around 70%.
An agent acting on stale data doesn't produce a single bad outcome. It produces bad outcomes at machine speed and scale: enriched records, drafted messages, and staged sequences, all built on records nobody reviewed.
Send Research's core thesis is that which connector a team wires in is now the point in the workflow where that risk gets decided - the buying decision, in effect, has moved from the vendor UI to the connector itself. ZoomInfo's position in this benchmark is a direct answer to that shift: when go-to-market teams chose a connector to trust with live agent access, they chose ZoomInfo more than any other provider, every week, for an entire quarter.
What’s Behind the ZoomInfo Connector
The connector is one access lane into GTM.AI, the API, MCP and CLI home for ZoomInfo's verified B2B intelligence - and the reason the connector performs the way it does starts with what's underneath it.
At the core is the GTM Context Graph: identity-resolved data on 100M companies and 500M contacts, plus billions of behavioral, technographic, and intent signals. Contact records include 135M+ verified phone numbers and 200M+ verified business emails - not scraped once and left to decay, but continuously refreshed, which is precisely the property that matters most given the 70% annual decay rate cited above. In a market where stale data actively produces bad agent outcomes, freshness isn't a feature - it's the entire value proposition of the connector.
The MCP implementation exposes a purpose-built tool set spanning company search, contact discovery, real-time enrichment, intent retrieval, and AI-powered recommendation. This isn't a generic API wrapper - it's built specifically for how agents consume data: structured for tool-calling, scoped to relevant entities, and fast enough for real-time agentic workflows. Every call is governed by the customer's existing data entitlements and permissions, so agents get exactly the access a human user would have, no more.
Above both layers sits ZoomInfo's governance plane: access control, permissions, data lineage, AI policy, and audit logging, applied consistently across every surface that consumes GTM.AI. As agentic workflows take on more autonomous action - enriching records, drafting outreach, updating CRM fields - that governance layer is what lets enterprises trust an agent with production data in the first place. It's a big part of why ZoomInfo, not a newer or narrower point solution, is the connector GTM teams are standardizing on.
The Same Data, Wherever Teams Work
Claude is one of dozens of completed integrations on GTM.AI, alongside Salesforce Agentforce, HubSpot Breeze, Microsoft Copilot, Gong, LeanData, Glean, ChatGPT, and Google Workspace.
That breadth is the point: a single connection to GTM.AI grounds any of these tools in the same continuously verified intelligence, with the same governance posture applied everywhere. Teams don't have to choose between "the tool their reps already use" and "the data they can trust" - GTM.AI is built to be the verified data layer underneath whichever surface the team is already standardized on, agentic or otherwise.
Try It Yourself
GTM.AI is generally available to ZoomInfo customers today. Setup guides for connecting ZoomInfo to Claude, ChatGPT, and Microsoft Copilot, along with full developer documentation for the MCP server and APIs, are available at GTM.AI.
If your team is already running agents against GTM data, this benchmark is worth a close read - because it's an independent look at where go-to-market teams are actually placing their trust.
Read the full Send Research benchmark: https://www.send.co/research/gtm-connectors
