Instantly AI Review: How to Set Up and Send Cold Email (Even If You Never Have)

Last updated: October 23, 2026

The average cold email gets a reply 3.43% of the time. That’s from Instantly’s own 2026 Cold Email Benchmark Report. The top 10% of senders get 10.7% or more.

So if you send 1,000 well-targeted cold emails, an average campaign gets around 34 replies. A good one gets over 100. From people who had never heard of you a week earlier.

That’s why cold email still works. And it’s why I think every solopreneur, freelancer, and small agency should know how to do it, even if you’ve never sent a cold email in your life. (I know, you’re scared right? Just follow this guide and you’ll be fine.)

This post is an Instantly AI review, but it’s really a beginner’s guide. I’ll explain what cold email is, why it still works, and exactly how to set it up and send your first campaign with Instantly, step by step.

Some links in this post are affiliate links. If you sign up through them, I may earn a commission at no extra cost to you.

What Is Cold Email?

Cold email is a one-to-one style email you send to someone you don’t know yet, who fits your ideal customer profile, to start a business conversation.

That’s it. It’s the email version of a cold call. Except it’s quieter, cheaper, and the person can reply when it suits them. You can get in front of people today.

And it’s different from spam. Spam is the same generic message blasted to anyone with an inbox. Good cold email is targeted. You pick a specific type of business, find the right person there, and send them a short, relevant message about a problem they probably have.

Here’s the thing most people miss. You’re not trying to sell in the first email. You’re trying to start a conversation. A reply like “sure, send me more info” is a win.

Why Cold Email Still Works in 2026

Most solopreneurs rely on two ways to get customers. Post content and hope the right people find it. Or pay for ads.

Content is slow. Ads are expensive. Cold email sits in the middle. You decide exactly who you want to talk to, and you reach them directly, for a few dollars a day.

It also gives you a number you can control. Instead of waiting for leads, you can say “this week I’ll contact 300 ideal customers.” That’s a very different feeling from posting and hoping.

I made the same point about social listening with Octolens. The businesses that grow fastest don’t just create and wait. They go and find the conversations. Cold email is the most direct version of that.

Keep in mind, it’s not free money. The numbers only work if three things are right: your emails land in the inbox, you send them to the right people, and the message is short and relevant. That’s where a tool like Instantly comes in.

About Instantly AI: Cold Email Software

Instantly is cold email software. It connects to your email inboxes, warms them up, sends your campaigns on a schedule, follows up automatically, and puts all your replies in one place.

It’s one of the biggest names in cold email. Instantly says it’s used by more than 40,000 teams and has a 4.8 rating from over 4,000 reviews.

Over the last couple of years it has grown well beyond sending. It now includes a B2B lead database, email verification, AI agents that write emails and handle replies, a simple CRM, and deliverability tools.

For a beginner, the important part is this. Instantly handles the technical stuff that usually makes cold email scary. Warmup, inbox rotation, sending limits, and follow-ups all happen automatically once you set them up.

My Experience Using Instantly

I’ve used Instantly myself, and the first thing that stood out was how simple and intuitive it is.

Setting up a sequence is straightforward. You write your first email, add your follow-ups, set the gaps between them, and you’re ready. No manual, no onboarding call.

Adding merge fields is just as easy. Merge fields are the placeholders, like {{firstName}} or {{companyName}}, that Instantly fills in for each lead when it sends.

And I think merge fields are really important to get right. Talk in specifics and you get better results. “Hi there, I help businesses grow” gets ignored. “Hi Sarah, I saw Brightside Physio just opened a second clinic in Austin” gets read.

Merge fields are what let you be that specific across hundreds of emails. Get them wrong and someone receives “Hi {{firstName}},” which is about the fastest way to lose a reply. So always check a few previews before you launch.

The other thing I liked is how easy it is to unhook people from the sequence once they respond. Nobody wants a “just bumping this up” follow-up after they’ve already replied, whether they said yes or no. Taking them out of the sequence keeps you helpful instead of annoying.

Overall, it’s a great UI. Clean, quick, and you’re not hunting around for settings.

Instantly AI Features

Unlimited Email Accounts and Warmup

This is the feature Instantly is best known for.

Every Instantly outreach plan includes unlimited email accounts and unlimited email warm-up. Warmup means Instantly sends and receives emails between your inbox and a network of other real inboxes, opens them, replies, and marks them as “not spam.” Over a few weeks, that builds a sending reputation so your real emails land in the inbox.

Most other tools charge per inbox or per user. With Instantly, you can connect 3 inboxes or 30 at the same price. That matters, because sending safely means spreading your volume across several inboxes.

Instantly Lead Finder

You need people to email. Instantly includes a database of more than 450 million B2B contacts.

You filter by things like job title, industry, company size, location, keywords, and lookalike companies. Then you pull the leads straight into a campaign. It also does work email enrichment across several data providers, plus company details like headcount, funding, job postings, and technology used.

Lead data runs on Instantly credits, which are priced separately from the sending plan. More on that below.

AI Email Writer and AI Agents

Instantly has an AI email writer and several AI agents, including an AI Sales Agent that can find leads and run campaigns, and an AI Reply Agent that drafts or sends replies.

You can use 5 major AI models, including OpenAI and Anthropic, or plug in your own API key.

My advice for beginners: use the AI to draft and personalize, but read everything before it goes out. Your first campaign should sound like you.

Unibox

Unibox is one shared inbox for every reply across every connected email account.

When you’re sending from 4 or 10 inboxes, you don’t want to log into each one to check for replies. Unibox pulls them all into one place, and you can label leads as interested, not interested, meeting booked, and so on.

Deliverability Tools

Instantly includes inbox placement testing, so you can see whether your emails are landing in the inbox or the spam folder before you send a full campaign.

Higher plans add more advanced deliverability features. The biggest plan includes SISR, which is Instantly’s system for assigning dedicated servers and IP addresses to protect your sending reputation.

How to Set Up Cold Email With Instantly (Even If You Never Have Before)

Here’s the whole process, from zero to your first campaign. Most of it is a one-time setup.

Step 1: Buy a Separate Domain for Cold Email

Never send cold email from your main business domain.

If something goes wrong and your domain gets flagged as spam, you don’t want that to hit the email address you use for clients, invoices, and everything else.

So buy one or two lookalike domains. If your business is acmedesign.com, you might buy getacmedesign.com or acmedesign.co. Set each one to redirect to your main website so it still looks legitimate.

Step 2: Create 2 to 3 Inboxes per Domain

On each new domain, create a few real inboxes through Google Workspace or Microsoft 365, like [email protected] and [email protected].

Use real names, add a profile photo, and add a simple signature. These are going to be sending real emails to real people.

Instantly also sells ready-made email accounts if you’d rather skip this step.

Step 3: Set Up SPF, DKIM, and DMARC

These are three DNS records that prove to Gmail and Outlook that you’re allowed to send email from your domain. They sound technical, but it’s mostly copy and paste.

You add them in your domain registrar’s DNS settings. Instantly’s help centre has step-by-step guides, and it says the setup takes around 15 to 20 minutes per domain.

Don’t skip this. Since 2024, Google and Yahoo require proper authentication from bulk senders, and unauthenticated email increasingly gets rejected outright.

Step 4: Connect Your Inboxes to Instantly and Start Warmup

Start your free Instantly trial, connect your inboxes, and switch on warm-up for each one.

Then wait. Instantly’s own guidance ranges from at least 2 weeks to 4 weeks or more for brand-new domains.

This is the step beginners hate, because they want to start sending today. But warmup is what separates campaigns that land in the inbox from campaigns that disappear into spam. Leave warmup running even after you start your campaigns.

Step 5: Build and Verify Your Lead List

While your inboxes warm up, build your list.

You can use Instantly’s lead database, or upload a list you already have. Either way, verify every email address before you send. Bounced emails hurt your sending reputation fast.

Instantly has verification built in. If you’re using a list from somewhere else, I’ve also written about how to clean and validate your email list with Bouncer.

The more specific your list, the better. “Owners of physiotherapy clinics in Texas with 5 to 20 staff” beats “small businesses” every time.

Step 6: Write a Short Cold Email Sequence

A sequence is your first email plus a few automatic follow-ups. Instantly sends each follow-up only if the person hasn’t replied.

Follow-ups matter. Instantly’s benchmark data found that 58% of replies come from the first email, and 42% come from follow-ups. So if you only send one email, you’re leaving almost half your replies on the table.

Keep it to 3 or 4 emails, spaced a few days apart. Use merge fields for the first name, company name, and one specific detail about each lead, so every email reads like it was written for that person. I’ve included a simple template below.

Step 7: Set Your Sending Schedule and Limits

Set your campaign to send during business hours in your prospect’s time zone, on weekdays.

Then set a daily limit per inbox. Instantly’s own advice is around 30 cold emails per inbox per day, with some of its guides going up to 50. As a beginner, stay at 30 or below.

So if you have 4 inboxes, that’s about 120 cold emails a day, or roughly 2,600 a month on weekdays. That’s plenty to find out if your offer works.

Step 8: Launch, Then Manage Replies in Unibox

Hit launch. Instantly sends your emails, follows up automatically, and stops the sequence as soon as someone replies.

Check Unibox once or twice a day. Reply quickly to anyone interested, and make sure anyone who has replied is out of the sequence so they don’t get another follow-up. And honour every “please remove me” request right away.

A Simple Cold Email Template for Beginners

Here’s a basic 3-email sequence you can adapt. Replace the parts in brackets.

Email 1
Subject: quick question about [company]
Hi [first name],
I noticed [something specific about their business]. A lot of [type of business] I talk to struggle with [specific problem].
I help [type of business] [specific result] without [common pain].
Worth a quick chat to see if it’s a fit?
[Your name]

Email 2 (3 days later)
Hi [first name], just bumping this up in case it got buried. Happy to send a 2-minute video showing how it works instead, if that’s easier.

Email 3 (4 days later)
Hi [first name], I’ll leave it here. If [specific problem] ever becomes a priority, just reply to this email and I’ll pick it up.

Notice what’s missing. No links in the first email, no attachments, no long paragraphs about you. Short, specific, and easy to reply to.

How Many Cold Emails Should You Send Per Day?

For a beginner, here’s a simple rule. About 30 cold emails per inbox per day, after a full warmup, with warmup left running.

If you want to send more, add more inboxes and domains instead of pushing each inbox harder. That’s exactly why Instantly’s unlimited email accounts are useful.

Also watch your spam complaint rate. Google’s limit is 0.3%, and it recommends staying under 0.1%. That’s only 3 complaints per 1,000 emails. Which is another reason to keep your list targeted and your emails relevant.

Instantly Pricing

Instantly splits its pricing into two parts. Outreach plans cover sending. Instantly credits cover leads and data. You can buy either on its own, or get them together as a bundle.

Plan	Price (monthly)	What you get
Outreach Growth	$47/mo	Unlimited email accounts and warmup, 1,000 uploaded contacts, 5,000 emails a month, chat support
Outreach Hypergrowth	$97/mo	Unlimited email accounts and warmup, 25,000 uploaded contacts, 125,000 emails a month, premium live support
Outreach Light Speed	$358/mo	500,000 emails a month, 100,000 uploaded contacts, SISR dedicated servers and IPs
Growth Credits	$47/mo	1,500 Instantly credits a month for the 450M+ lead database, enrichment and AI tools
Starter bundle	$94/mo	Outreach Growth plus Growth Credits, plus the AI Sales Agent
Scale bundle	$194/mo	100,000 emails a month, 25,000 uploaded contacts, 5,000 credits, AI Reply Agent and Unibox

Here’s how I’d think about it as a beginner.

Outreach Growth at $47 a month is enough to start if you already have a list, or can get one elsewhere. You get unlimited inboxes and warmup, 1,000 uploaded contacts, and 5,000 emails a month.

The Starter bundle at $94 a month makes sense if you want Instantly to find your leads too. It combines Outreach Growth with 1,500 Instantly credits a month for the lead database.

You’ll also pay for your domains and email inboxes separately, through your registrar and Google Workspace or Microsoft 365.

Prices are from Instantly’s pricing page in October 2026, and annual billing is cheaper. At the time of writing, Instantly’s trial page also offers code EVENTGIFT for 20% off Hypergrowth for 3 months on a first purchase.

Instantly vs Smartlead

Smartlead is Instantly’s closest competitor. Both offer unlimited email accounts and warmup, which is why they’re both popular with agencies and beginners.

Smartlead’s Basic plan is $39 a month for 2,000 active leads and 6,000 emails a month. Instantly’s Growth plan is $47 a month for 1,000 uploaded contacts and 5,000 emails.

So Smartlead is a little cheaper at the entry level. Where Instantly pulls ahead is the all-in-one setup: the built-in lead database, AI agents, and a cleaner interface that I think is easier for a first-timer to learn.

If you’re very price-sensitive and already have your own lead source, Smartlead is worth a look. If you want one tool that does everything, Instantly is the easier start.

Instantly vs Lemlist

Lemlist is one of the oldest names in cold email. It’s known for personalization features like custom images and videos, plus LinkedIn steps in the same sequence.

The big difference is pricing structure. Lemlist charges per user, starting at around $69 per user per month for its email plan, and its plans changed in 2026, so check the current pricing. Instantly charges a flat price with unlimited email accounts.

For a solopreneur sending from several inboxes, Instantly’s model is usually cheaper. If LinkedIn outreach is a big part of your plan, Lemlist or a dedicated tool like Sendpilot may suit you better.

Is Cold Email Legal?

In most places, yes, as long as you follow the rules.

In the US, the CAN-SPAM Act applies. Your emails need honest sender details and subject lines, a real physical postal address, and a clear way to opt out. You have to honor opt-outs promptly.

Gmail and Yahoo also have their own rules for bulk senders: proper SPF, DKIM, and DMARC authentication, easy unsubscribes, and a spam complaint rate under 0.3%.

Rules are stricter in other regions. If you’re emailing people in the EU, UK, or Canada, check the local rules on business-to-business email first. I’m not a lawyer, so take this as a starting point, not legal advice.

Final Thoughts on Instantly AI

Cold email looks intimidating from the outside. Domains, DNS records, warmup, deliverability. It’s a lot of jargon.

But once you break it down, it’s a one-time setup followed by a simple routine. Instantly makes that setup about as easy as it gets. The unlimited inboxes and warmup take care of the hardest technical part, and the lead database means you don’t need a separate data tool to get started.

I’ve used it, and what I like most is how simple it makes the parts that matter: building a sequence, getting merge fields right, and pulling people out the moment they reply.

It’s not perfect. Pricing is split into outreach and credits, which takes a minute to understand. And no tool can fix a bad offer or a lazy list. But for a beginner who wants one place to learn and run cold email, Instantly is the tool I’d start with.

Bottom Line

Cold email lets you pick exactly who you want as a customer and start a conversation with them directly. Content is slow. Ads are expensive. Cold email sits in a very useful middle ground.

Here’s your next step. Start the Instantly free trial, which doesn’t need a credit card and includes 50 free leads. Buy one new domain today, set up two inboxes, and turn on warmup. While they warm up, build a list of 200 very specific ideal customers and write your 3-email sequence.

In 2 to 4 weeks, you’ll send your first campaign.

Try Instantly AI free

Instantly AI FAQ

What is Instantly AI used for?

Instantly AI is cold email software. It’s used to connect and warm up email inboxes, find B2B leads, send cold email campaigns with automatic follow-ups, and manage replies in one inbox.

Is there an Instantly AI free trial?

Yes. Instantly offers a free trial with no credit card required, and it includes 50 free leads when you sign up.

How much does Instantly cost?

Instantly’s Outreach Growth plan starts at $47 a month for unlimited email accounts and warmup, 1,000 uploaded contacts, and 5,000 emails a month. Lead credits are priced separately, and bundles start at $94 a month. Annual billing is cheaper.

How long should I warm up a new email account?

Plan for at least 2 weeks, and closer to 4 weeks for a brand-new domain. Keep warmup running after you start sending campaigns.

How many cold emails can I send per day?

A safe starting point is about 30 cold emails per inbox per day after warmup. To send more, add more inboxes and domains rather than sending more from each one.

Should I use my main domain for cold email?

No. Use a separate lookalike domain, so your main business email is protected if a cold email domain runs into deliverability problems.

Is Instantly better than Smartlead?

Both are strong. Smartlead is slightly cheaper at the entry level. Instantly has a built-in lead database, AI agents, and an easier interface for beginners, so it’s the simpler all-in-one choice.

What is a good cold email reply rate?

According to Instantly’s 2026 benchmark report, the average reply rate is 3.43%. The top 25% of senders get 5.5% or more, and the top 10% get 10.7% or more.