7 Best AI Agent Platforms that Integrate with HubSpot

You live in HubSpot. You manage deals, contacts, and tickets there. But most “AI Agents” are isolated islands that require you to copy-paste data back and forth. You need an AI that can read your CRM, update deal stages, and enroll contacts in workflows automatically.

Here are the 7 best AI agent platforms that actually talk to HubSpot in 2026.

TL;DR

– Best Overall (Sales/BDRs): Relevance AI

Why: Native, two-way sync that lets you build “AI BDRs” to research leads and update HubSpot fields without Zapier.

– Best for Visual Workflows: Gumloop

Why: Incredible drag-and-drop canvas, though it relies more on linear automation than “looping” agents.

– Best for Simple Tasks: Zapier Central

Why: If you already use Zapier, this is the easiest way to add a “Brain” to your existing Zaps.

Best for Enterprise: Stack AI

Why: SOC2 compliant, secure, and built for large-scale data processing.

1. Relevance AI

Best For: Sales Teams & Agencies replacing manual SDR work.

Relevance AI is currently the strongest option if your goal is to build an “AI Workforce”—specifically, AI BDRs (Business Development Reps). Unlike other tools that just “send data” to HubSpot, Relevance agents can read a list of companies from your CRM, visit their websites, find the decision maker, draft an email, and then update the HubSpot contact property with the research.

– The Killer Feature: “Looping” Agents. You can set up an agent to check HubSpot every morning for new leads, research them, and only flag the “High Intent” ones for your human team.

– Real User Proof: One G2 reviewer noted it “helps solve coverage gaps… and follows up with lower scored leads as a digital AI SDR.” 

– HubSpot Integration Depth: Native. It supports creating contacts, updating properties, and triggering workflows.

2. Gumloop

Best For: Operations teams who want a visual builder.

Gumloop has gone viral for its beautiful “node-based” interface. It feels like a modern version of Make.com but for AI. While Relevance focuses on “Agents” (autonomous workers), Gumloop focuses on “Flows” (Step 1 → Step 2).

– Why it wins: It’s easier to debug. You can see exactly where data flows from HubSpot into your AI model and back out.

– The Limitation: It often relies on webhooks or intermediate steps rather than the deep “Agentic” behavior of Relevance.

– Pricing: Great free tier for testing.

3. Zapier Central

Best For: Teams who already pay for Zapier.

Zapier Central is Zapier’s answer to AI agents. It sits on top of the 6,000+ apps Zapier already connects to.

– How it works: You create a “Bot” and give it access to your HubSpot portal. You can then tell it: “Whenever a new deal is created, research the company and add a note.”

– Pros: You don’t need to learn a new API. If you have a Zapier connection, you have an agent.

– Cons: It can be expensive (Task costs add up), and the “reasoning” capabilities are often simpler than specialized tools like Stack or Relevance.

4. Stack AI

Best For: Enterprise & Security-focused teams.

If you are a large company, you can’t just let a random AI agent access your entire CRM. Stack AI focuses heavily on Governance and Security (SOC2).

– How it works: It allows you to build complex RAG (Retrieval Augmented Generation) pipelines that can pull data from HubSpot, answer questions based on your internal knowledge base, and push answers back—all while keeping data secure.

– Pricing: Expensive. It is not for the $20/mo user; it’s for teams building serious infrastructure.

5. Lindy

Best For: “Chief of Staff” tasks & Meeting Notes.

Lindy markets itself as an “AI Employee.” It integrates with HubSpot primarily to handle Calendar & Meeting workflows.

– Use Case: Lindy can join your sales calls, transcribe them, extract the “Next Steps,” and automatically create a Task in HubSpot for you to follow up.

– Vs. Relevance: Lindy is more “pre-packaged” (ready to use), whereas

is a “builder” (you create the agent).

6. n8n

Best For: Developers & Self-Hosted Geeks.

n8n is the open-source alternative to Zapier/Make. It recently added strong “AI Agent” nodes.

– Why developers love it: You can self-host it. This means your data doesn’t leave your servers (huge for privacy).

– HubSpot Power: Because it’s code-friendly, you can do anything with the HubSpot API, not just what the pre-built integrations allow.

– Warning: Steep learning curve. If you don’t know what JSON is, stick to Relevance.

7. Clay

Best For: Data Enrichment (The “Agent-Adjacent” Pick).

Clay isn’t a “general purpose” agent builder, but it is the King of Outbound Data.

– The Workflow: You pull a list from HubSpot into Clay -> Clay uses 50+ data providers (and AI) to find valid emails, LinkedIn profiles, and recent news -> Clay pushes the “Golden Record” back to HubSpot.

–Why include it? If your goal is just data enrichment, don’t build a complex agent in Relevance. Just use Clay.

Which fits your HubSpot Stack?

FAQs

1. What AI tools integrate with HubSpot?

The best AI tools that integrate directly with HubSpot include:

– Relevance AI: For building autonomous “BDR Agents” that research leads and update CRM fields.

– Gumloop: For visual, flowchart-style automation (great for Ops teams).

– Zapier Central: For adding simple AI “behaviors” to existing Zapier workflows.

– Stack AI: For enterprise-grade security and RAG (chatting with your documents).

– Clay: The best specific tool for data enrichment and scraping before sending data to HubSpot.

2. Does HubSpot have AI agents?

Yes. HubSpot launched Breeze AI (formerly ChatSpot), which includes native “Breeze Agents.”

– Prospecting Agent: Researches and engages leads.

– Customer Agent: Handles support tickets.

– Social Media Agent: Generates and schedules posts.

Note: While useful, these native agents are often less flexible than custom builders like Relevance AI if you need complex, multi-step workflows outside the HubSpot ecosystem.

3. Who are the big 4 AI agents?

In the context of the underlying intelligence powering these tools, the “Big 4” refers to the model providers:

– OpenAI (ChatGPT/GPT-4o): The brain behind most agent platforms (including Relevance).

– Anthropic (Claude 3.5 Sonnet): The current leader for coding and complex reasoning tasks.

– Google (Gemini 1.5): Known for its massive context window (reading huge files).

– Microsoft (Copilot): Deeply integrated into the Office 365/Enterprise ecosystem.

4. Which is the best AI agent platform?

There is no single “best,” only the best for your role:

– Best for Sales/BDRs: Relevance AI (Focus on outreach and research).

– Best for Ops/Visual Builders: Gumloop (Focus on clear, linear data flows).

– Best for Developers: LangChain or n8n (Focus on code control).

– Best for Simple Tasks: Zapier Central (Focus on ease of use).