6 Best AI Email Response Generators in 2025 [+ 4 Reasons to Try Them]

AI email response generators can improve your communications and save hours of effort every week. Research shows that AI-generated emails have higher clickthrough rates as well as higher click-to-open ratios than manually written messages. 

Artificial intelligence also reduces the effort it takes to compose each email, allowing you to get more done in less time. That’s why AI email response generators are an essential tool in your arsenal. 

An email response generator uses a large language model (LLM) to analyze past conversations to predict the best response to an email, adding contextual and personalized information. 

In this quick primer, we explain the benefits of AI generators and the best platforms available in the market right now. 

4 Ways an AI Email Response Generator Can Help

If you’re on the fence about implementing an AI email platform, take a look at the benefits you can expect.

Research shows 8 hrs 42 minutes a week (almost a whole workday) is spent writing emails. An AI email response generator can reduce this manual effort, help maintain consistency, schedule perfect followups, and continuously improve writing quality.

1. Stop writing emails from scratch 

Most teams will interact with scores of co-workers and customers a month, many of who require nearly identical replies. Artificial intelligence learns from previous replies in similar situations and recommends the appropriate response. This is better than just copy-pasting text, because an AI email response generator will also tweak the message here and there to fit a specific recipient automatically. 

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#ProTip: Create Gmail templates to cut down your email writing time even more. 

2. Maintain a consistent and memorable brand voice 

When a large team works on internal and external communication, the brand voice could get lost. Individuals may respond how they deem fit, which could deviate from brand guidelines either intentionally or accidentally. 

An AI email response generator is trained on your organization's data and knows precisely which tone to adopt. It’s a good idea to combine this technology with a shared inbox platform, so that everyone in your team can access and send out consistent emails. 

3. Avoid following up too much or too little 

Keeping people engaged via email is a delicate science. While you want to communicate frequently, it’s important to avoid being pushy or follow up too often. 

An AI email response generator helps you stick to a perfect schedule with little to no intervention on your part. You can configure different follow-up intervals for each type of recipient, escalate issues that have been delayed too long, or automatically respond with a personalized email even outside of business hours. 

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#ProTip: The Gmelius AI agent lets you set up automation rules with a one-line command. Try it today! 

4. Continuously improve how you write emails, across the organization 

AI email response generators are continually fed on communication data generated across the organization. It’s always learning, and implementing these lessons in every email written. 

This means that individual you are under less pressure to investigate past results and glean best practices. You can rely on the artificial intelligence to update an email’s tone, content, and even timing based on what works with customers. 

6 Best Paid and Free AI Email Response Generators to Try

Users looking for a trusty AI email response generator can check out several promising options.

Some of the popular email response generators to try include Gemini (free and paid), Gmelius (paid with free trial), ChatGPT (free and paid), Hiver (paid with free trial), and Planable (free basic tool), and MailMeter (free basic tool).

1. Google Gemini 

Google’s proprietary AI assistant is included in Google Workspace for business plans, as well as the AI Premium plan, which includes 2TB storage. With Gemini installed, a wand icon appears next to the send button in your email compose window. By clicking on this icon, you can generate email responses automatically and tweak the draft with simple prompts. 

2. Gmelius 

Gmelius integrates a powerful, proactive AI Draft Assistant directly into your Gmail workspace. Unlike other tools that require you to click a button or write a prompt, Gmelius works in the background. When you open an email that needs a response, it has already generated a complete, context-aware reply that's waiting for your review.

This "no-prompt-needed" approach is designed to cut reply time from minutes to seconds. It achieves this high level of personalization by tapping into your conversation history (analyzing up to two years of past emails) to learn your unique writing style. It can even connect to your company's sitemap, creating a custom knowledge base to ensure replies are accurate and rich with your specific product information and policies.

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This system empowers both personal inboxes and shared inboxes like support@ or hr@, helping teams resolve issues faster and maintain a consistent brand voice. The AI is also highly customizable; you can set its drafting frequency from "Minimal" to "High" and it’s smart enough to know when not to reply to newsletters or emails where you're just CC'ed, even leaving a note to explain its decision.

Powered by Google's latest Gemini model, this entire AI Draft Assistant is included for free with all Gmelius subscriptions, offering advanced, secure, and privacy-first AI without an extra fee.

3. ChatGPT

ChatGPT is one of the most popular AI email response generators today, and it’s free for the most part. You can login into the conversational Gen AI platform with any email ID, and instruct it to write emails or any other content. 

Bear in mind that advanced model usage is limited in the free plan and for really effective emails, you’ll need prompt engineering skills. Further, you’ll still need to copy-paste your email responses from ChatGPT to your inbox. 

#ProTip: Try the free Gmelius OOO Reply Generator on ChatGPT!

4. Hiver

Hiver is another email collaboration platform that includes a response generator. It writes simple, plagiarism-free emails using correct grammar and a professional tone. However, Hiver’s main use is for customer service and some customers find the cost prohibitive, especially when comparing Gmelius vs. Hiver. 

5. Planable

Planable is a content marketing platform that offers a free AI email response generator. The UI is sleek, and easy to use, and you can toggle settings such as emojis, length, and writing style. 

However, remember that this is a standalone tool and responses have to be copy-pasted on your email client. Further, Planable’s AI engine may not be adequately trained on email data, like some of the competitors such as Gmelius. 

6. Mailmeter

Mailmeter’s AI email response generator is incredibly simple, without any additional settings. If you’re looking to quickly respond to an email without too much personalization, details, or contextual data, it can be a good choice. 

7. Fyxer

Fyxer positions itself a personalized AI assistant that focuses on learning and perfectly mimicking your unique communication style. It trains on your past email history to absorb your specific tone, vocabulary, and sign-offs, ensuring that the replies it helps you generate sound authentically like you.

Fyxer expands its capabilities beyond just drafting text by also offering Smart Triage to automatically sort and prioritize your inbox. Plus, it functions as an AI calendar assistant that can manage your schedule, booking and rescheduling meetings for you simply by being CC'ed on an email thread, aiming to handle the complete email lifecycle.

Frequently Asked Questions About AI Email Response Generators

What is the most accurate AI email reply generator?

‍Accuracy depends on context, but Gmelius is among the top performers for Gmail users. Its AI doesn’t just generate a grammatically correct reply, it reads the thread, understands tone, and adapts to your communication style automatically.

Can AI tools really write professional email responses?

‍Yes. AI email generators like Gmelius, Gemini, and ChatGPT can craft polished, professional replies using natural language processing. Some, like Gmelius, even personalize tone and wording based on your team’s past messages.

How does Gmelius AI compare to ChatGPT and Gemini for email drafting?

‍While ChatGPT and Gemini require prompts, Gmelius takes it further by working proactively inside Gmail. It reads the conversation and drafts smart replies without needing to be asked. Ideal for high-volume email teams.

Are AI reply generators useful for customer support emails?

‍Definitely. AI generators like Gmelius and Hiver can help support teams send timely, consistent responses. Gmelius also includes automation rules, SLA tracking, and shared inbox tools making it especially powerful for support workflows.

Do AI email writers understand email tone and context?

‍Advanced tools like Gmelius and ChatGPT (paid tiers) are trained to recognize tone, context, and intent. Gmelius goes a step further by aligning replies with your organization’s tone, so every message stays on-brand.

What’s the best AI tool to manage email replies?

‍Gmelius stands out for Gmail-based teams. It not only drafts replies but also organizes, tags, and assigns emails automatically, turning email from a daily chore into a streamlined workflow.

Is there an AI that automatically drafts email replies?

‍Yes. Gmelius' AI Reply Assistant can proactively scan conversations and draft responses without requiring a prompt. It's designed to save time and prevent important messages from falling through the cracks.

Conclusion: Regain Time with Gmelius  

Artificial intelligence for emails can be extremely useful when used correctly. It can save hours of manual effort, break through writer’s block, help complete tasks when you’re too tired to compose emails manually, and strengthen your company’s brand voice. 

A good AI email response generator is like a handy co-pilot, assisting in small but meaningful ways so that no email is left unattended and well-written messages are sent out, always on time. Gmelius is taking this technology a step further, building a no-prompt-needed AI responder that works proactively. 

‍Sign up for Gmelius to regain the time you’re now spending writing and managing emails.