What does an AI sales email generator actually do?
An AI sales email generator writes a first draft of a cold email or a follow-up sequence from what you tell it, and some tools also add each prospect's public details. The draft can only use what you, or the tool's own data, give it.
Hunter's help page lists the inputs plainly, so it makes a good example. Its AI Writing Assistant asks for an audience persona, the problem your audience faces, your solution and your unique selling proposition, a goal (such as book a meeting or get a reply), a tone, a style and how many follow-ups to write. Hunter says it uses ChatGPT to generate the content. A separate Personalize emails switch then writes a unique version of every email for each recipient, using the step you wrote plus publicly available information such as name, company and role.
The tools fall into three groups:
- Free writers. You type a prompt and get a draft. Mailmeteor's AI Email Writer is a free web tool you copy from; HubSpot's AI Email Writer (labelled Beta on its page) sits inside HubSpot's free tools.
- General AI chat tools such as ChatGPT, Claude or Gemini, or Copy.ai's Chat plan, which gives access to OpenAI, Anthropic and Gemini models.
- Writers inside a prospecting or sending tool. Hunter, Instantly, lemlist and RegieGO draft the emails and send them from mailboxes you connect.
Which AI sales email generators are there, and what do they cost?
The table compares seven tools by what their own pages showed on 4 November 2026. Prices are in US dollars, on monthly billing unless stated, and credits and limits change often, so check the page before you buy.
| Tool | Type | Where the AI writer sits | Price shown | Sends the email? |
|---|---|---|---|---|
| HubSpot AI Email Writer | Built into HubSpot | HubSpot says its AI email writing features are free; premium marketing features sit in Marketing Hub Starter, Professional and Enterprise | Free | Yes, through HubSpot's email tools |
| Mailmeteor AI Email Writer | Free web tool | No sign-up, credit card or usage quota, per Mailmeteor | $0 | No; you paste the draft into Gmail or Outlook |
| Copy.ai Chat | General AI chat | 5 seats, OpenAI, Anthropic and Gemini models | $29 a month, or $24 a month billed $288 a year | Not listed on the Chat plan |
| Hunter Starter | Cold email tool | AI Writing Assistant on paid plans only; the $0 Free plan doesn't include it | $49 a month, or $34 a month billed $408 a year | Yes; Starter connects 3 email accounts |
| Instantly | Cold email tool | AI Email Writer Agent listed under Growth Credits ($47 a month) | $94 a month for the Starter bundle (Growth outreach plan plus Growth Credits) | Yes; 5,000 emails a month on Growth |
| lemlist Email | Outreach tool | Plan lists lemAgent and Signal, Enrichment and Messaging AI agents | $69 a month, or $55 a month billed yearly; unlimited users | Yes; 50,000 emails a month |
| RegieGO | AI prospecting tool with a built-in CRM | Free plan: 250 one-time credits per person for research, enrichment, drafting and agents | Pro $49 a month ($41 annual); Team $150 per seat a month ($125 annual), two seats minimum | Yes, from your own Gmail or Outlook |
Mailmeteor's free writer drafts one email at a time and doesn't send. The paid tools add sending: Hunter Starter connects 3 email accounts, Instantly's Growth plan sends 5,000 emails a month and lemlist Email 50,000.
What would a small team really pay?
Here is our own arithmetic for a three-person team, using the cheapest plan with an AI writer for each tool, at monthly list prices on 4 November 2026. For RegieGO we use Team, its plan for two or more people, because Pro is for one person and the Free plan's 250 credits per person are one-time. Dividing by three is our calculation; not every vendor prices per person.
| Tool and plan | Monthly bill for 3 people | Per person |
|---|---|---|
| Mailmeteor or HubSpot free writer | $0 | $0 |
| Copy.ai Chat (up to 5 seats) | $29 | $29 ÷ 3 = $9.67 |
| Hunter Starter (unlimited team members) | $49 | $49 ÷ 3 = $16.33 |
| lemlist Email (unlimited users) | $69 | $69 ÷ 3 = $23 |
| Instantly Starter bundle | $47 + $47 = $94 | $94 ÷ 3 = $31.33 |
| RegieGO Team (per seat) | 3 × $150 = $450 | $150 |
Per-seat pricing triples with three people; flat pricing doesn't move. Now add review time, which no pricing page shows. Say each draft takes 2 minutes to check and your team sends 30 first emails a day (both numbers are an example, not a benchmark): 30 × 2 = 60 minutes a day, or 20 hours over 20 working days. Time your own checks for a week before you upgrade.
What do the vendors themselves tell you to check?
HubSpot's and Mailmeteor's own pages say a person should check every draft. HubSpot's FAQ on best practices tells users to proofread every message for spelling, brand voice and tone, and to send a test email to check that personalisation tokens and formatting work. It also says: "Independently validate the accuracy and truth of outputs when you use this tool before finalizing or publishing any work product."
Mailmeteor's FAQ says drafts are usually ready with minor edits, but that AI can still miss specific facts, names or context, so proofread figures, dates and anything the model couldn't know about your business. It also advises against using AI for legal, medical, financial, HR or confidential emails.
Hunter's help page adds a detail that matters at volume: turning on Personalize emails replaces your content with AI-written versions for each recipient, and the preview shows what will be sent. The switch can only be turned on before a sequence launches, so read a sample of the previews before you press launch.
On spam, the claims come from vendors. Mailmeteor says AI-written emails are not flagged by spam filters by default, and that reputation, authentication and content are what matter. Google's email sender guidelines, which we read on 4 November 2026, don't mention AI at all. They cover authentication, a spam rate kept below 0.3% in Postmaster Tools, and content rules such as visible links. If drafts are already landing in spam, our cold email spam fix list starts with the checks that matter most.
What should you fix in an AI-written sales email?
Check eight things in every draft before it goes. The left column is what to look at; the right is the fix.
| Check | Why | Fix |
|---|---|---|
| Every fact about the prospect | HubSpot and Mailmeteor both say to verify facts in AI output | Open the page behind each fact. Cut any you can't open. |
| Merge fields such as first name | HubSpot says to send a test to check personalisation tokens | Send one test to yourself and read it on your phone |
| Subject line | Google says not to start a subject with Re: or Fwd: unless the message really is a reply or forward; the FTC's CAN-SPAM guide says don't use deceptive subject lines | A few words that say what the email is about |
| Praise for the company | Readers name vague praise as a tell, as our post on whether people can tell AI-written emails shows | Replace it with the one reason you're writing now |
| Groups of three benefits | The same post reports that readers and Wikipedia's AI-writing guide flag groups of three | Keep the one benefit that matches their problem |
| More than one ask | Two asks make the reader choose | One question they can answer from a phone |
| Links and tracking | Google says links should be visible and easy to understand | No link, or one plain link, in the first email |
| Length | Hunter's form, for one, lets you choose short, medium or long | Pick short, then cut again. Our guide on how long a cold email should be has the data. |
If the email's main purpose is to promote a product or service, the FTC's guide to the US CAN-SPAM Act also expects a postal address and a clear way to opt out, and says the law makes no exception for business-to-business email. Our guide to whether cold email is legal covers the UK and EU too. This is not legal advice.
Before and after: fixing one generated draft
Here is a draft with the problems from the table, then the same email fixed. We wrote both to show the patterns; no tool produced them, and Acme Dental Group, Priya and Northwind Scheduling are sample names.
What's wrong: a fake Re: in the subject, a merge field that would show raw if the name is missing, a location count nobody checked, praise, three benefits, two asks and a calendar link before any interest.
The after version has one fact you can open, one problem, one benefit and one small ask, in under 60 words. For more first emails written this way, see our B2B cold email templates.
What brief should you give an AI email generator?
A generator can only use the facts you give it, which is why Hunter's form asks for a persona, a problem and a goal. Paste this into any generator or chat tool, fill the brackets, and ask for the list of facts at the end, which turns your check into a 30-second job.
Keep a copy of each brief with the email you sent. When replies come in, you can see which inputs produced them.
Which kind of generator fits a small B2B team?
Match the tool to the job you actually have. Prices below come from the tables above.
| Your situation | Use | Cost on 4 Nov 2026 |
|---|---|---|
| A few emails a day, each one researched by hand | A free writer or a chat tool, with the brief above | $0 to $29 a month |
| You have a verified list and need sequences sent | A writer inside a sending tool (Hunter, lemlist, Instantly); read the preview before launch | $49 to $94 a month at monthly list prices |
| You don't yet know who to write to, or why now | A tool that finds the reason first, then writes | Varies |
The third row is where an AI SDR fits. Siela's Lead Finder, for example, looks for a reason to reach out now, such as someone hiring for the work you automate or comparing tools, and scores each lead hot, warm or cold with a one-line reason. A second AI checks each LinkedIn and X message before it is sent, and email goes from a Gmail mailbox you connect.
This week, take your last ten AI drafts, run them through the eight checks and time yourself. If most need a rewrite, fix the brief before you pay for a bigger plan.
Frequently asked questions
Is there a free AI sales email generator?
Yes. On 4 November 2026, HubSpot said its AI email writing features are free, and Mailmeteor's AI Email Writer needed no sign-up, card or quota. RegieGO's free plan gave 250 one-time credits per person for drafting and research. Hunter's free plan did not include its AI Writing Assistant, which is on paid plans only. Mailmeteor's writer only drafts; you paste the result into Gmail or Outlook.
Do spam filters flag AI-written sales emails?
Google's email sender guidelines, read on 4 November 2026, say nothing about AI-written content. They judge authentication, user spam reports and practices such as honest subject lines and visible links. Mailmeteor states that AI emails are not flagged by default, which is a vendor's claim. A generic email that annoys people can still be reported, and Google says that when a domain's mail is often reported as spam, its future messages are more likely to be marked as spam.
Can AI personalise each sales email automatically?
Some tools do. Hunter's Personalize emails switch writes a unique version of each email and follow-up for every recipient, using your draft plus public details such as name, company and role. It replaces your content, works only before the sequence launches, and the preview shows what will be sent. Read a sample of those previews, because any wrong detail goes out under your name.
What should I give an AI email generator to get a good draft?
Give it who the person is, the reason you're writing now with a link you checked, their problem, what you do in one sentence, one proof you can back up and one ask. Hunter's own form asks for a persona, problem, solution, unique selling point, goal and tone. Ask the tool to list every fact it used, so checking takes seconds.
Can I use ChatGPT as a sales email generator?
Yes, and some dedicated tools run on the same models: Hunter's help page says it uses ChatGPT, and Copy.ai's Chat plan offers OpenAI, Anthropic and Gemini models. The difference is the data and the sending. Copy.ai's Chat plan lists no sending feature, so give the chat tool the brief and the source of every fact, then send from your own inbox.
Sources
- HubSpot: AI Email Writer (checked 4 Nov 2026)
- Mailmeteor: AI Email Writer (checked 4 Nov 2026)
- Copy.ai: Pricing (checked 4 Nov 2026)
- Hunter: Pricing (checked 4 Nov 2026)
- Hunter Help: Using the AI writing assistant in Hunter's Email Sequences (checked 4 Nov 2026)
- Instantly: Pricing (checked 4 Nov 2026)
- lemlist: Pricing (checked 4 Nov 2026)
- RegieGO (Regie.ai): Pricing (checked 4 Nov 2026)
- Gmail Help: Email sender guidelines (checked 4 Nov 2026)
- FTC: CAN-SPAM Act: A Compliance Guide for Business (August 2023, edited January 2024; checked 4 Nov 2026)