A complete 2025 guide to the HubSpot AI email writer

Let’s be real: trying to write great, personal emails at scale feels like a never-ending task. Whether you’re in marketing or sales, you know the pressure. You need to reach more people, but the moment you lose that personal touch, your reply rates plummet. AI promises to help, saving you hours while keeping engagement high.

That’s why platforms like HubSpot are building AI right into their software, and the HubSpot AI email writer is getting a lot of attention. But is it actually the right tool for your team? In this guide, we’ll take an honest look at what it does well, where it stumbles, what it really costs, and how it compares to more powerful, specialized solutions.

What is the HubSpot AI email writer?

First off, you can’t just go out and buy the HubSpot AI email writer on its own. It’s a feature that comes packaged inside HubSpot’s larger AI toolkit, which they call Breeze. It’s built to help you draft marketing campaigns, sales emails, and other content without ever leaving the HubSpot platform.

The main idea is simple: you give it a prompt, and it generates a full email draft for you. It pulls from the data you already have in the HubSpot Smart CRM, so it can add a decent amount of personalization.

This tool is really for teams who are already living and breathing HubSpot. If your entire workflow is built around their CRM and marketing tools, the AI email writer is meant to feel like a natural add-on. The catch, however, is that its knowledge is stuck inside HubSpot. It can’t see or learn from anything outside that bubble, which is a big deal we’ll get back to in a minute.

Key features of the HubSpot AI email writer

If your team works exclusively in HubSpot, the AI email writer has some genuinely useful features that can make content creation a little less painful.

Get past the blank page

The most obvious win is its ability to cure a case of writer’s block. You can give it a simple instruction, like "Draft an email about our new webinar for marketing managers," and it will spit out a full draft.

It comes up with subject lines and body copy, which is a lifesaver when you’re short on time or fresh ideas. From there, you can ask it to tweak the tone (think more professional, friendly, or witty) to get it closer to your brand’s voice without having to start from scratch.

Personalization using your CRM data

One of the tool’s real strengths is that it’s directly connected to the HubSpot Smart CRM. Since it can access your contact and company info, it can do more than just drop in a "[First Name]".

For example, the AI can help you write a different message for a lead who downloaded your ebook on "AI in Marketing" compared to someone who just browsed your pricing page. By using details like job titles, industries, or past interactions, it makes your emails feel more specific and less like you sent the same thing to everyone.

Email optimization and templates

Beyond just writing the words, the AI offers a few other tricks. It can look at your past email performance inside HubSpot to suggest a better time to send your next campaign, which could give your open rates a nice little bump.

And for teams moving over from another platform, this next feature is pretty handy. You can upload an email template from a tool like Mailchimp or even a Figma design, and the AI will do its best to recreate it as an editable HubSpot template. This can save a ton of time you would have spent manually rebuilding everything.

Where the HubSpot AI email writer falls short

While the built-in features are nice for HubSpot power users, you’ll probably start to feel constrained if your company’s knowledge lives in more than one place. Here are some of its biggest drawbacks.

Limited to the HubSpot bubble

The HubSpot AI’s intelligence is completely walled off. It only knows what’s inside HubSpot. It has no access to the critical info your team keeps in places like Confluence, Google Docs, Notion, or Slack. This creates huge blind spots. If the real story behind a customer issue is buried in a support ticket or an internal wiki, the HubSpot AI is clueless. The result is often generic email drafts that are missing key context.

An infographic illustrating how eesel AI connects to various knowledge sources, a key differentiator from the HubSpot AI email writer.

This is exactly the kind of problem a dedicated platform like eesel AI was built to fix. Instead of being locked into one app, eesel AI connects to all of your knowledge sources right away. It plugs into your help desk, wikis, and chat tools to give its AI a complete picture of every customer and every solution. This means it can generate responses that are way more relevant and accurate because it’s working with your entire company’s knowledge, not just your CRM data.

Lack of workflow control

HubSpot’s AI is good at writing content, but it’s not a true workflow tool. You can ask it to write an email, but you can’t tell it to do anything else. It can’t look up an order status in Shopify, create a ticket in Jira, or check a customer’s subscription in your payment system. You’re stuck with the basic actions that HubSpot has already defined for you.

A screenshot of eesel AI's customization rules, showing how users can create custom actions, a feature unavailable in the HubSpot AI email writer.

In comparison, eesel AI gives you a fully customizable workflow engine, so you’re in the driver’s seat. Using a simple prompt editor, you can tell the AI exactly how to behave, limit its knowledge to certain documents, and create custom actions that connect to any of your other tools. This turns the AI from a simple writer into an assistant that can actually resolve issues, escalate tickets, and pull real-time information.

No safe testing environment

How can you be sure an AI is ready for your customers before you flip the switch? It’s a fair question, and HubSpot doesn’t really have a good answer. It lacks a proper testing environment, so you can’t see how it would have handled thousands of your past emails to find its weak spots. You’re more or less forced to test it on live customers, which can feel pretty risky.

A screenshot of eesel AI's simulation mode, which allows testing against historical data, a safer alternative to the HubSpot AI email writer's live testing.

This is another spot where a purpose-built tool makes a difference. eesel AI’s simulation mode is a huge advantage here. It lets you safely test your entire AI setup on thousands of your real historical support tickets in a private sandbox. You get clear forecasts on how often it will resolve issues and how much you could save, so you can tweak your settings and launch with confidence, knowing exactly how it’s going to perform.

HubSpot AI email writer pricing: What you’ll actually pay

The HubSpot AI email writer isn’t something you can buy separately or as a cheap add-on. It’s bundled exclusively with HubSpot’s pricey premium plans, meaning you have to make a pretty big commitment to get access.

To use the AI email features, you’ll need at least the Marketing Hub Professional plan, which starts at $800 a month, or the Enterprise plan, starting at a cool $3,600 a month.

On top of that, many of the AI features run on HubSpot Credits. Think of these as an internal currency you spend on different AI tasks, like having an AI agent respond to a customer. This credit system can make your costs hard to predict. If you have a busy month, you could end up with a much higher bill than you expected.

This is a very different approach from eesel AI’s straightforward pricing. Our plans are based on clear feature tiers with a set number of AI interactions, so your bill is always predictable. There are no per-resolution fees that punish you for successfully helping more customers. Plus, with flexible monthly plans available, you don’t have to get locked into a big annual contract just to get started.

Is the HubSpot AI email writer right for you?

So, who is this for? If your team is 100% committed to the HubSpot ecosystem and you just need a simple tool to help you draft emails faster, the built-in AI writer is a decent perk. It’s convenient because it’s already there, and it can definitely help with basic content creation.

But the limitations are real. It’s stuck in a data silo, it can’t perform custom tasks, there’s no good way to test it before it goes live, and the true cost is hidden inside expensive plans and a confusing credit system.

A more powerful alternative for your entire workflow

If you need an AI that does more than just write emails, it’s worth looking at a dedicated AI platform. eesel AI is a powerful, flexible tool that connects to your entire stack of tools, not just one of them. It’s built to give you the control and intelligence that you just can’t get from a tool that’s confined to a single platform.

With eesel AI, you can:

• Go live in minutes, not months. You don’t need a developer or a long onboarding process. You can get set up yourself, right away.

• Unify all your knowledge. Break down the walls between your help desk, wikis, and internal docs to create a much smarter AI.

• Get total control. Tell your AI exactly how to work with custom prompts and actions that can connect to any tool you use.

• Test with confidence. Use the simulation mode to get rid of the guesswork and roll out your AI knowing exactly what to expect.

Don’t settle for an AI that’s stuck in a silo. Unify your knowledge and automate your support with an AI that works across all your favorite tools. Start your free eesel AI trial today.