11 Best AI Email Assistants in Winter 2025 (according to client reviews)

What’s more overwhelming than an inbox flooded with unanswered emails, a long lead list you have to email, and prospects to research? Having to do it all on your own. Manually.

Managing everything takes time and energy. Failure to “divide & conquer” will drag your sales to a crawl.

So that it’s easier to get your sales outreach and inboxes in good shape, we’ve researched the best AI email assistants according to real user reviews.

Qualification criteria: Which AI email assistants made the cut?

There are tons of tools on the market for writing SDR emails. To make your (and our) lives easier, we decided to limit our review to only email assistants that managed to meet a few simple criteria:

• The email assistant must have received 10+ reviews within the last 12 months.
• The email assistant must have an average 4.5 rating for ease of use, value for money, and customer service.
• Reviews must be public on G2, Capterra, Trustpilot, or similar websites.

Here are the 11 AI email assistants that made our list:

• AiSDR – 5.0 (Capterra) | 4.7 (G2)
• OneShot – 4.7 (G2)
• Regie – 4.4 (G2)  
• Lavender – 4.8 (G2)
• Unify – 4.8 (G2)
• Copy.ai – 4.7 (G2)
• Clay – 4.9 (G2)
• Qualified – 4.9 (G2)
• MailMaestro – 4.8 (G2)
• Superhuman AI – 4.7 (G2)
• SaneBox – 4.8 (Capterra) | 4.9 (G2)

Here are a few notable AI email assistants that didn’t make the cut for reasons such as low ratings or lack of user reviews:

• Artisan – 2.5 (Capterra) | 3.0 (G2) out of 3 reviews on G2 
• 11x – 3.6 (Trustpilot) | G2 profile is unclaimed
• SmartWriter – 2.1 (Trustpilot)
• AWeber – 4.2 (G2)
• Lyzr.ai – N/A (Capterra) | N/A (G2)

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Best AI email assistants (based on customer reviews)

Email tools range from simple email assistants that declutter your inbox and create personalized emails all the way up to advanced AI sales prospecting tools with email and inbox management. Our list includes both types, so you can choose the right tool for your needs and budget.

AiSDR

Price: $750 per 1,000 emails per month

Average rating: 4.7 (28 reviews, G2) 

AiSDR is an AI sales outreach platform that automates your entire outreach process and runs on autopilot until a meeting is scheduled.

Main features

Inbox warm-up

AiSDR automatically rotates and warms up your inboxes, so you don’t have to worry about your emails ending up in a spam folder.

AI smart replies

AiSDR will answer incoming messages with a contextualized reply within 10 minutes. This occurs 24/7 without you needing to watch your inbox. AiSDR will even automatically handle any OOO auto-replies from leads by pausing outreach sequencing until the lead returns to work.

Sales persona builder

Fill in a persona questionnaire and provide information such as case studies and landing pages for the AI to scrape information from. You can provide your own email framework, or you can experiment with different frameworks sourced from leaders in sales. AiSDR will use all the information provided to build a sales persona and provide you with email examples for reviews.

Lead database with advanced search filters

AiSDR comes with access to a lead database of over 700M+ contacts, which you can filter according to intent signals like hiring intent, last funding round date, company news, web search activity, or tech stack or software.

AI training

You can train AiSDR to match your tone of voice and writing style by giving examples of good messages, copywriting rules to follow, and a list of strict do’s and don’ts. Follow up with feedback to keep the agent learning on the go. 

Native integration with Hubspot

AiSDR can automatically pull your contacts and create dedicated campaigns, updating CRM records about lead’s activity. Also, AiSDR personalizes messages based on 3 Hubspot lead properties (including custom properties) and intent signals.

AI video generation

You can generate AI videos with your digital avatar to create a personalized pitch for your prospect. To create your digital replica, you need to record a short video to train AiSDR with your facial expressions, gestures, and tone of voice.

What do customers like most?

Customer support ready to help you at any moment

Flat price and unlimited seats

Fast and easy setup and learning curve

New inboxes set up and warming up

Consistent and repeatable outreach

The system handles communication until the scheduled call: all you have to do is monitor

AiSDR tailors emails to match the tone of voice

Access to a large dataset of leads

AI handles auto-replies and writes answers for you

What do customers think could be better?

It would be nice to have more behavioral triggers, such as using data about website visits to personalize the message

AI messages do not always match expectations

There could be more integrations to other CRMs like Salesforce

It would be nice to have more lead data for niche industries, especially on LinkedIn

It would be nice if the AI could automatically look up leads that match the target audience without manually selecting the criteria for each filter

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OneShot

Price: $49-$99 per user (depending on the number of credits) and $399 per team; free plan available

Average rating: 4.7 (19 reviews, G2)

OneShot is an autonomous prospecting platform that lets you create personalized messages for any channel and connect with prospects at the right time on autopilot.

Main features

AI-powered research

OneShot gathers insights about your leads from multiple sources and finds prospects that match your buyer persona.

Personalized messaging

OneShot instantly personalizes your messages and tailors them according to the channel, whether it’s email, LinkedIn, or a cold call. 

Integration with your sales tools

OneShot integrates natively with Apollo, Salesloft, Outreach, and HubSpot and automatically updates your CRM data. 

What do customers like most?

It’s easy to set up

The tool works in tandem with Sales Navigator

It makes detailed and up-to-date research about prospects 

It analyzes not only generic information but also ISP signals

What do customers think could be better?

There are some lags in data integration

There could be more prompting abilities

Regie

Price: Priced according to use case

Average rating: 4.4 (337 reviews, G2)

Regie is a generative AI tool for sales teams that sources leads, warms them based on engagement signals and intent, and automates your outbound email strategy. Regie supports both autopilot and co-pilot workflows to take your AI sales prospecting to the next level.

Main features

Personalized messaging

You can customize your AI model with your persona, priority data sources, and email body and subject line prompts to craft unique and engaging emails. 

Automated email sequences

Regie automatically prioritizes emails to ensure high-value conversations don’t get lost in inbox noise. Disengaged prospects slowly drop off your list, giving you more time and focus for warm leads.

Dynamic follow-up

Regie analyzes lead engagement to create a smart messaging sequence that leads your prospect to book a meeting. 

What do customers like most?

Consistent communication with prospects on autopilot

Automation and personalization of emails based on LinkedIn profile

Creation of personalized outreach sequences

Automated optimization feature

Real-time monitoring and reporting tools

The tools quickly fetch relevant information about the prospect

Trigger-based emails

Ability to get lead emails directly from LinkedIn

What do customers think could be better?

Few help resources on the website

The interface could be smoother

Regie.ai’s customization capabilities are fairly restricted, making it unsuitable for enterprises with extremely particular requirements

Messaging is very American. It would be better to have international customization

Lavender

Price: $27-$45 per month; free plan and custom team plan available

Average rating: 4.8 (60 reviews, G2)

Lavender is an email intelligence platform that helps SDRs write better by scoring emails and then providing suggestions on how to improve and personalize a message. 

Main features

Email scoring system

Lavender analyzes your email subject, content, and personalization level and gives you a score from 1 to 100. If your score is 90 or above, you’re likely to get more replies from your prospects. Lavender also gives real-time coaching to ensure emails follow best sales practices.

Personalization assistant

Lavender’s personalization assistant surfaces prospect data and insights from your CRM and gives tips on how to personalize your message for better engagement.

Start email feature

If you’re stuck facing a blank page, this feature gets your email started. Just create a list of bullet points to include, and Lavender will come up with a draft.

Mobile editor

The Mobile Editor optimizes your email for mobile screens, increasing the chances a message will be read and replied to. 

What do customers like most?

Getting real-time feedback on emails 

Email grading feature

Sentiment analysis

Integration with Hubspot, Apollo, Salesloft, Gmail, Outlook, and more

What do customers think could be better?

It would be good to add team members to the dashboard to work together.

It would be nice to compose emails inside Lavender and save them in folders. 

Email templates would be useful to save time.

There could be a way to not take points away for commonly used phrases or add an exceptions list to exclude them from the algorithm.

It would be good if the platform had a mobile version.

Unify

Price: from $700 per month

Average rating: 4.8 (24 reviews, G2)

Unify is an AI platform for warm outreach. It analyzes your CRM data and intent signals, such as website behavior, product usage, new hires, and email engagement, to help you connect with prospects right when they’re ready to buy. 

Main features

Comprehensive contact research via waterfall

You can set criteria for searching multiple prospects to get emails and phone numbers. With waterfall enrichment, you can search multiple data sources until you find a match.

Email personalization

Unify’s AI agents personalize your message based on a prospect’s profile, CRM and LinkedIn data, and company updates. These agents scrape websites, social media, and news to provide you with relevant information. You can track the whole AI research process to double down on what works.

What do customers like most?

Automated AI sales prospecting

Data accuracy

The ability to build specific audiences based on intent

What do customers think could be better?

Onboarding and education on new features

Integration with more platforms

Copy.ai

Price: from $36 per month; free plan available

Average rating: 4.7 (181 reviews, G2)

Copy.ai is an all-in-one AI solution that works across your tech stack to validate contacts and give you smart insights for more targeted outreach campaigns.

Main features

Smart, dynamic prospecting

Copy.ai agents scrape data about your prospects around the web and then run them through multiple data sources to validate and flesh out contacts that match your ICP.

Hyper-personalized outreach

Copy.ai’s contact research goes beyond just an email, role, and phone number. It also takes into account a prospect’s job history, interests, motivations, and pain points to create a compelling context for a cold email draft.

Content creation

Copy.ai analyzes your brand tone of voice and value props and uses them to generate professional and engaging content. It can also repurpose sales call transcripts and interviews as compelling articles.

What do customers like most?

Relevant and detailed data on prospects and accounts

Content generation for emails, social media, blogs, etc.

What do customers think could be better?

It would be nice to have more tone-of-voice options

Some generated outputs may be plagiarized or pulled from unverified resources, so you always have to double-check

Clay

Price: from $134 per month; free plan available

Average rating: 4.9 (144 reviews, G2)

Сlay helps scale your personalized outreach by bringing 100+ data enrichment tools and an AI research agent under one hood. 

Main features

Automated outbound

Clay helps sales reps quickly build a list of prospects and reach out to them with better-targeted emails. The platform tracks signals that indicate a lead is ready to buy and generates a personalized email for each contact.

Clay AI agent

Clay’s AI agent replaces manual account research by answering questions about your leads and giving relevant information about people who work in your target company, their roles, and recent activity. 

AI message writer

You can write your own prompts to insert Clay-enriched data into your emails or use a predefined template. Then, send your emails to your preferred email manager for scheduling.

Intent signals

Intent signals let you monitor your target accounts and get alerts on their job promotions, job changes, new hires, etc. to reach out to them at the right time.

What do customers like most?

A variety of integrations for workflow automation

Pre-built enrichment recipes

The ability to create flows tailored to your needs

Searching for verified contact information across various data sources

Clay offers dozens of data providers you can test using their pay-as-you-go credit system

A responsive community support Slack channel

What do customers think could be better?

Some customers find Clay credits overpriced and not valuable compared to using the API key directly

It would be helpful to have a credit tracker, so you don’t burn through all credits without realizing it

There’s no ability to automatically sync data from your LinkedIn or social accounts to the platform

Qualified

Price: from $3,500 per month

Average rating: 4.9 (1,066 reviews, G2)

Qualified is designed to enhance your inbound sales engagement and increase website conversions. Qualified’s AI SDR – Piper – works to engage, qualify, and capture leads and schedule meetings around the clock.

Main features

AI email

With AI email, you can follow up, nurture, and convert inbound leads when they’re most engaged. Qualified’s AI email builder lets you set up criteria for your campaign; create prompts, tone, and context; and watch your campaign as it runs.

AI sequence simulator

An AI sequence simulator creates personalized emails for each lead based on their engagement, website activity, and data. Each email is based on your lead’s goals, intentions, and stage in the buyer’s journey.

Comprehensive lead and account data

Qualified creates a 360-degree buyer profile enriched with data like buying intent, website activity, and sales data, so you can make better data-driven decisions and reach out to your customers or leads with meaningful messages. 

AI meetings

Qualified tracks returning website visitors and captures their data, such as company, title, and location, together with the pages they’re viewing and how they browse content. When a visitor arrives on your site, AI SDR engages them via chatbot and leads them to schedule a meeting. 

What do customers like most?

Qualifying and converting website leads

Insights about website visitors

Success architect who helps with onboarding and training

Seamless integration with CRMs

What do customers think could be better?

Reporting could be more customizable

Email drafts are not automatically saved

The initial setup has a high learning curve

MailMaestro

Price: from $12; free plan available

Average rating: 4.8 (14 reviews, G2)

MailMaestro is a general AI email assistant that can summarize email threads, write personalized responses, organize your inbox, and help you declutter your emails. 

Features

AI email summary and response

MailMaestro can turn long email threads and even long attachments into brief summaries and responses in just one click, meaning you no longer have to re-read all messages to recall a conversation.

AI email writer

Give short instructions to MailMaestro, and it will come up with three alternative email drafts. You can pick a language (it supports 18 languages), tone of voice, email length, and goal.

AI meetings manager

When a meeting invitation hits your inbox, MailMaestro instantly detects it, checks your availability, and books it if you’re free.

AI personality

You can make MailMaestro’s generated messages sound more like you by feeding it information such as your job title, word choices, do’s and don’ts, and tone of voice. 

Keyword shortcuts

You can set up predefined shortcuts to add data you need to your emails with just one click.

What do customers like most?

Simple to install

Saves a lot of time 

Quick management of meeting requests

Summary of long email threads

What do customers think could be better?

It’s good at generating short replies but may lag when crafting longer emails

Superhuman AI

Price: from $25/user per month

Average rating: 4.7 (752 reviews, G2)

Superhuman AI is an email assistant that promises to save you four hours each week by managing your inbox, replying to messages, and scheduling meetings.

Features

Schedule meetings

Arranging a call via email? With Supehuman, you can instantly create events right from your inbox, including title, description, location, attendees, and other details. If you need to invite other team members, Superhuman will check their availability and suggest a time that suits everyone.

AI-driven search and query

Ask any question, and Superhuman AI will scan your inbox to find the answer. No need to keep everything in mind — get the answer you need in just a few seconds.

Draft replies

Superhuman AI can generate draft replies to your emails right after they arrive. All you need to do is tweak the draft or just hit send if everything looks good.

Automatic email triage

Email triage can help you declutter your inbox and finally achieve that desired Inbox Zero. For example, you can set reminders for when to reply or follow up with the sender by just hitting H on your keyboard. Also, if there are emails you don’t want to manage, just mark them as Done and remove them from your inbox.

Follow-up nudges

To quickly follow up with your prospects, you can prepare nudges for any use case, such as rescheduling missed meetings or reminding them about the upcoming call.

What do customers like most?

A slick and simple interface

Fast and easy email management

Split inboxes for organizing your emails

Intelligent folder filtering

What do customers think could be better?

It would be good to have more integrations; currently, only Google Calendar is available

The tool is expensive, especially for the everyday user

Not all email services are supported

You can’t see emails across all accounts in one view, so you need to switch accounts

SaneBox

Price: 14 days for free, and then the price starts from $4.13/month

Average rating: 4.9 (175 reviews, G2)

SaneBox is an email manager that helps you forget about inbox clutter, increase your productivity, and focus on what matters.

Features

Black Hole

If you’re drowning in emails from unwanted senders, just move them to Black Hole, and you’ll never see a message from those senders again.

Snooze folders

With snooze folders, you can get an email out of your inbox and have it come back at a time you choose, so nothing slips through the cracks.

Daily digest

SaneBox’s daily digest saves you time by summarizing unopened emails and outlining the most important points from each one.

Email declutter

SaneBox automatically sorts unimportant emails into separate folders so they no longer bother you.

What do customers like most?

All the features help you clean up your email account, so nothing distracts you

Easy and convenient to set up

What do customers think could be better?

The dashboard can be difficult to navigate

The daily summary design could be more appealing

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