10 AI Mail Drafters: Write Emails 10x Faster in 2025

I used to spend hours perfecting emails—rewriting subject lines, second-guessing my tone, and getting stuck on how to start. It was exhausting. Then I discovered AI email tools, and things changed (for good!). Suddenly, I was writing follow-ups in minutes, and they actually sounded like me.

If your inbox ever feels like a black hole of drafts and delays, I know how it feels. I’ve rounded up 10 AI email drafters that help me write faster, sound better, and get out of my own head. Let’s begin!

What are AI mail drafters?

AI mail drafters are tools that help you write emails faster using artificial intelligence. 

Instead of starting from scratch, you input a prompt or give the tool a bit of context, like who you’re writing to and what you want to say, and it generates a well-written draft for you. 

These tools can also personalize messages, suggest subject lines, and learn your tone over time.

Why do these tools matter now?

Everyone has access to general-purpose AI tools like ChatGPT or DeepSeek. 

But if writing emails is a significant part of your job—like if you’re in sales, running a business, or managing lots of client communication, you need a tool that’s specifically built for email. 

AI email drafters are trained to understand email context better, suggest stronger messaging, and help you hit send with more confidence.

What types of emails can AI mail drafters write?

You can write almost all kinds of emails using an AI email tool, including: 

• Cold outreach emails: For introducing yourself or your product to someone who’s never heard of you. AI cold email generators help with personalization at scale so every message feels tailored
• Follow-up emails: Perfect for nudging leads who haven’t replied, following up after meetings, or continuing conversations. AI can suggest timing, tone, and next steps
• Meeting scheduling emails: From suggesting times to rescheduling politely, AI can handle the back-and-forth with clarity and professionalism
• Inbound lead responses: When someone fills out a form or books a demo, AI can instantly draft a warm, helpful reply that keeps the momentum going
• Proposal or pitch emails: Attach a proposal or deck with a message that highlights the value. AI helps frame your offer clearly and professionally
• Client check-ins: Great for sending progress updates or touching base during a project. AI can generate friendly, informative messages without starting from scratch
• Thank-you emails: After a call, meeting, or collaboration, AI helps you send sincere notes of appreciation that feel personal
• Feedback and testimonial requests: Ask for reviews or feedback at just the right moment—without sounding awkward or pushy
• Internal team updates: Keep your team in the loop with status updates or handoffs
• Re-engagement emails: For reaching out to old leads or inactive clients. AI helps strike the right balance between friendly and proactive

What are the best AI mail drafters in 2025?

Here are my top 10 picks: 

Jason AI SDR

First on our list is Jason AI SDR, an AI email drafting and outreach automation tool designed for sales teams, marketing teams, small businesses, entrepreneurs, and recruiters. 

A gentle reminder: Jason AI SDR is our own product at Reply.io, but it earned the top spot on its own merit. With a powerful feature set designed to save time, cut costs, and scale outreach, it’s a tool that drives real results. 

Jason automatically creates personalized emails, LinkedIn messages, and call scripts using real-time insights from your recipients’ social media profiles, online activity, company websites, and other relevant sources. 

You can also provide key pain points, value propositions, proof points, or case studies to make sure the output is truly tailored to your ideal customer profile (ICP). 

Jason gives you flexible control over how your messages are sent. Whether you want to automate everything or stay hands-on, you can choose the mode that fits your workflow:

1. Autopilot: Jason AI generates personalized responses using real-time data and sends them automatically on your behalf. This option is Ideal for high-volume outreach where speed and scale matter most.
2. Copilot: Prefer a bit more control? With Copilot, Jason AI drafts customized responses based on your insights. But you get the final say—you can review, edit, and send when you’re satisfied with the draft. This mode works best for high-stakes conversations or key accounts that need extra attention.

Jason AI goes beyond writing messages—it powers your entire outreach strategy. Here’s how it helps you reach the right prospects, through the right channels, at the right time:

Intelligent targeting

Jason starts by analyzing your product and value proposition to define your ICP. It taps into a global database of over 1 billion contacts—including 220+ million US contacts and 15+ million US companies. 

It also tracks real-time intent signals such as hiring activity, technology usage, and behavioral insights. If you already have target accounts, all you have to do is upload your list and Jason will prioritize outreach accordingly.

Multichannel integration

Jason engages prospects across email, LinkedIn, and phone to build effective sequences. You can create high-quality outreach flows with automated follow-ups that feel natural and timely. 

Jason also adapts to your prospect’s language preferences and tailors messages based on their responses or your input. With this approach, you can ensure every interaction feels relevant and authentic.

Automatic meeting scheduling

Jason handles scheduling without the back-and-forth. It reads replies to understand whether a prospect wants to book a meeting, follow up, or reschedule, and responds appropriately. 

The tool syncs with your Google Calendar to check your availability, avoid overlapping meetings, and find the best time that works for both you and your prospect.

Jason AI SDR pros:

✅ Train Jason by creating AI SDR playbooks
✅ Add up to 8,000 characters of context, enabling the AI SDR to craft more relevant and personalized responses
✅ Communicate with prospects in their preferred language
✅ Access 30+ advanced deliverability tools from Reply, including email warm-up, health monitoring, and best practice enforcement, to maximize email performance and reach more prospects

Jason AI SDR cons:

❌There’s a learning curve for beginners 

Jason AI SDR pricing: 

• AI SDR Starter: $300/month
• AI SDR Growth: $1500/month
• AI SDR Enterprise: $10,000/month

Lavender 

Lavender is an email intelligence platform built to help sales teams write better, faster, and more effective emails. Its Email Coach reads your emails and scores your message in real-time and flags anything that could hurt your reply rate—aiming for a score of 90+ to boost responses.

Lavender pros:

✅ Seamlessly integrates with tools like Gmail, Outlook, Outreach, Salesloft, HubSpot, Apollo, Groove, Gong, and more
✅ The Personalization Assistant pulls relevant prospect data into your inbox
✅ Tracks team performance, reply rates, and ROI—so you can see what’s working, spot gaps, and coach reps where needed

Lavender cons:

❌ Occasional glitches in the UI

Lavender pricing:

• Basic: Free 
• Starter: $29/month per user (monthly billing)
• Individual Pro: $49/month per user (monthly billing)
• Team Plan: $99/month per user (monthly billing)

Gemini in Gmail 

Gemini, part of Google Workspace Labs, brings generative AI directly into Gmail. It allows you to draft emails from scratch using simple prompts, or fine-tune existing ones by making them more concise, formal, or detailed.

Gemini works natively in Gmail, so there’s no need to switch apps. It’s ideal for teams that already use Google Workspace.

Gemini in Gmail pros:

✅ Contextual Smart Reply suggests responses based on the content of the email
✅ Compatible with desktop, Android, iPhone, and iPad
✅ Give feedback on AI-generated drafts to help improve future suggestions

Gemini in Gmail cons:

❌ Lacks the depth and control needed for high-stakes professional emails like sales or outreach campaigns

Gemini in Gmail pricing:

• Free
• Business Starter: $6.30/month per user (1-year commitment)
• Business Standard: $12.60/month per user (1-year commitment)
• Business Plus: $22/month per user (1-year commitment)
• Enterprise: Custom pricing

Grammarly for Business

Grammarly Business helps teams write in a unified, on-brand voice. Upload your style guide and company-specific terms to give employees real-time, relevant writing suggestions based on your brand standards.

Its tone profile feature ensures everyone strikes the right voice (and cleans the fluff from your email), while Knowledge Share automatically surfaces key company info as people type—no need to dig through docs. 

Grammarly works across tools like Google Docs, Gmail, Slack, LinkedIn, Salesforce, and Microsoft Teams to keep communication consistent without copy-pasting between apps.

Grammarly Business pros:

✅ Includes a suite of tools like grammar checking, plagiarism detection, AI content detection, and citation generator
✅ Strategic writing suggestions help you decide what to emphasize for maximum audience impact
✅ Enterprise plan offers advanced admin controls for managing team usage and settings

Grammarly Business cons:

❌ You can upload a style guide and set tone preferences, but sometimes it falls short in capturing nuanced brand voices

Grammarly Business pricing:

• Free
• Pro: $30/month per user (billed monthly)
• Enterprise: Custom pricing

Regie.ai

Regie.ai’s RegieOne is an AI-native sales engagement platform that goes beyond basic personalization. It taps into over a dozen data sources, including CRM fields, company news, and recent updates, to craft tailored emails for each lead.

What sets RegieOne apart is its analytics layer. You get detailed performance insights not just on opens and replies, but on how specific messaging (like value props and pain points) performs over time. Every email is scored before sending to help you fine-tune for maximum engagement.

Regie.ai pros:

✅ You can adjust the balance between AI-generated and rep-edited emails to match your strategy
✅ Lets you control the volume of emails sent daily by Agents
✅ Offers native prompt customization

Regie.ai cons:

❌ High price point makes it inaccessible for smaller teams 

Regie.ai pricing:

• RegieOne Sales Engagement Platform: Pricing based on number of prospecting sales reps, starting at $35,000/year
• AI Agents + AI Dialer: Pricing based on number of prospecting sales reps, starting at $35,000/year
• AI Agents: Pricing based on number of prospecting sales reps, starting at $35,000/year

Jasper

Jasper is an AI-powered tool built for content and copywriting. While it’s widely used for creating blog posts, product descriptions, and landing pages, it also works well for writing emails.

Using Jasper’s email templates, you can generate subject lines, email copy, and calls to action tailored to your brand’s tone and goals. Input your product or company name, define the purpose of the email, and choose a tone, and Jasper will provide several polished options to choose from.

You can also test different tones of voice to see what resonates best with your audience and improves open rates.

Jasper pros:

✅ Supports 25+ languages
✅ Craft written content and images directly within Jasper’s editor interface
✅ Comes with enterprise-grade security and an LLM-agnostic architecture to protect your data 

Jasper cons:

❌ Jasper doesn’t track performance or offer A/B testing, so it can’t optimize emails based on what works/doesn’t work

Jasper pricing:

• Creator: $49/month per seat (billed monthly)
• Pro: $69/month per seat  (billed monthly)
• Business: Custom pricing  

Copy.ai

Copy.ai uses AI to turn your input into high-performing email copy. With a few clicks, you can generate polished emails ready for outreach. 

It also offers a free cold email generator that creates personalized emails based on a prospect’s public LinkedIn profile—a great way to speed up targeted outreach!

Copy.ai pros:

✅ Built for a wide range of go-to-market (GTM) use cases
✅ Includes a free email subject line generator
✅ Prospecting Cockpit offers insights into buyer priorities to support more relevant sales conversations

Copy.ai cons:

❌ Email tone and structure may need manual tweaks for specific audiences

Copy.ai pricing:

• Free
• Starter: $49/month (billed monthly)
• Advanced: $249/month (billed monthly)

Compose.ai

Compose AI is a free Chrome extension that speeds up your writing with smart autocomplete. 

It can turn a few typed words into full email messages and generate professional replies with one click. By automatically pulling context from the original message, the tool keeps your response relevant.

Compose.ai pros:

✅ Autocomplete works across all your tools to streamline writing
✅ Seamlessly integrates with your existing platforms without getting in the way
✅ Learns your writing style over time and suggests personalized phrasing

Compose.ai cons:

❌ Customization options are limited compared to more advanced writing tools

Compose.ai pricing: Available for free

Magical

Magical is an AI-powered text expander that helps you write faster by turning your copy-paste history into reusable templates. You can also choose from over 1,000 readymade templates for emails, messages, and chats. 

Apart from text expansion, Magical can also generate full messages for you or suggest quick replies based on context.

Magical pros:

✅ Available as a Chrome extension
✅ Expand text for email, LinkedIn, chat, notes, and more
✅ Seamless and user friendly onboarding tutorial to get you started quickly

Magical cons:

❌ Good for general use, but if you need sales-focused emails, it’s better to go for a more specialized tool 

Magical pricing: Available for free

Crystal

Crystal is a writing assistant that helps you personalize emails by analyzing your recipient’s natural communication style. 

As you write, it suggests words, phrases, tone, and formatting improvements, so your message feels more aligned with how the reader prefers to communicate.

Crystal pros:

✅ Crystal does not store or access any sensitive data, including browser history, passwords, or personally identifiable information (PII)
✅ Works with browser-based versions of Gmail, Microsoft Outlook, and Microsoft 365
✅ Helps you understand each buyer’s preferred communication style, including what motivates them and what may cause friction—so you can build stronger connections

Crystal cons:

❌ Limited integrations 

Crystal pricing: Crystal Writing Assistant is available with Crystal’s free plan 

How do you get started?

Once you choose a tool, you can sign up and select a plan that works best for you. The setup process will vary slightly depending on the platform, but the tools we’ve covered above are designed with user-friendly onboarding—so getting started is quick and easy.

To give you a sense of what setup looks like, here’s a quick look at how you can configure reply handling using Jason AI (and its demo overall):

1. Open Sequences from the top header menu and click on the needed sequence.
2. Navigate to the Settings tab → expand the Jason AI assistant block.
3. Turn on the toggle ‘Handle replies’. Now, Jason AI assistant is connected to your sequence, and it will generate all the responses.

Here’s what happens after you enable this feature:

• Once your contact replies, Jason AI automatically categorizes the message in your Inbox. Based on that category, it analyzes the content and drafts a tailored response
• The AI-generated draft appears in your Inbox labeled with the AI draft category. Each response is reviewed by a team of proofreaders. Proofed drafts are marked in green, and unreviewed ones in orange
• When you open the thread, you’ll see the suggested response customized to your contact’s message. You can edit the draft, regenerate it, adjust the tone or style, or translate it into another language. Once you’re happy with the response, you’re ready to hit send

How do you train the AI to match your voice?

No matter which tool you choose, you’ll need to guide the AI to match your desired tone and messaging style. 

In Jason AI SDR, this is done through SDR Playbooks—your personalized framework for how the AI SDR should craft sequence messages.

With Playbooks, you can create detailed prompts to shape your outreach. You can tell the AI what to emphasize, what to avoid, how to structure the message, and specific do’s and don’ts. With greater control over how the AI writes, you can quickly write emails that align with your brand voice, goals, and outreach strategy.

How do you measure the impact?

Let’s say you’ve started using an AI email drafter. Now, you have to track if it’s making an impact on your business and evaluate whether it’s worth the investment. 

Here are some key metrics that’ll tell you what’s working and what’s not: 

What are some common mistakes to avoid?

When you’re implementing an AI tool to draft your emails, you have to maintain a balance between scale and quality. Here’s a quick rundown on the common mistakes you should steer clear of: 

1. Sending without editing

AI can generate complete emails quickly, but they often need some refining. For example, AI might suggest a generic line like ‘Just checking in…’—but a stronger follow-up would reference the last call or shared pain point.

2. Relying too much on generic language

AI tools tend to default to safe and generic language. Without edits, your emails can sound like every other cold outreach. For instance, instead of ‘We help businesses grow,’ personalize it to: ‘We helped [similar company] cut onboarding time by 40%.’

3. Not double-checking auto-personalization

AI tools sometimes pull personalization data from public sources like LinkedIn. It’s quick, but not always accurate. Misused or outdated details can damage credibility and trust, so don’t forget to double-check. 

4. Using AI for sensitive conversations

AI struggles with tone in complex or emotional situations—like dealing with objections, stalled deals, or client concerns. These situations require empathy and context only a human can bring.

5. Not checking whether the draft reflects your brand voice

AI doesn’t automatically align with your company’s tone or messaging style. You’ll need to revise suggestions to make the emails on-brand.

Wrapping up: Write emails faster with Jason AI SDR

With the right AI email drafter, you can spend less time typing and more time actually connecting—with leads, customers, and your team. Whether you’re looking to write faster, sound more polished, or just stop overthinking every email, there’s a tool out there to match your workflow.

If you’re in sales, that efficiency matters even more. That’s where Jason comes in. It helps automate and personalize outreach at scale—so you can cut the busywork and focus on closing deals.

Want a personalized walkthrough? Book a free demo and see how Jason can work for you.