ColdMerge
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For founders and small teams doing their own outreach

Cold email and follow-ups from your own Gmail.

Write your email and follow-ups. ColdMerge fills in details from your list, spaces out the sends, and stops follow-ups when it detects a reply. You handle the conversations in your usual inbox.

Start free trialSee how it works

14 days free. No card required. Sends from your own mailbox. Trial details

ColdMerge · Campaign
A ColdMerge campaign screen showing sends, replies, two connected mailboxes and their daily allowances

ColdMerge, connected to Gmail. Shown with demo data.

Campaign emails are sent through your connected Gmail account and appear in its Sent folder.

Sending windows and gradual ramp-up are built in, with randomized gaps between messages.

Cancel yourself from the billing page. No ticket to file.

How it works

From your list to a conversation, in three steps.

01

Connect your Gmail account.

Connect Gmail or Google Workspace through Google's consent screen. Your campaign emails are sent from that account and appear in its Sent folder.

Takes about a minute. Revoke any time from your Google Account.

ColdMerge wants access to your Google Account
[email protected]
Send email on your behalf
View your email messages and settings (read-only)
See your primary email address and basic profile info
CancelContinue

Schematic of Google's consent screen. Not a real capture.

SaaS founders intro · SequenceDraft · 40 people
Email 1 · Day 0Subject: Quick question about {company}
Hi {first_name}, I noticed {company} is hiring for outbound. I built a small tool that runs cold email through Gmail with strict limits. Worth a short look?
Wait 3 days if no reply
Follow-up 1 · Day 3Same thread
Bumping this in case it got buried, {first_name}. Happy to send a two-minute walkthrough if useful.
Wait 4 days if no reply

Schematic of the sequence editor, previewing each person in turn. Demo data.

02

Write your email and follow-ups.

Import your list, add fields such as a first name or company, and choose the gaps between follow-ups. Review your campaign before you start it.

One thread per person. Follow-ups reply to the original email.

03

Let the campaign run. Pick up the replies.

ColdMerge sends within your mailbox's allowance and sending window. Replies arrive in your usual inbox. When it detects a reply or bounce, it stops that person's remaining follow-ups.

Real campaign screen, shown with demo contacts.

The lower half of the same campaign screen: each mailbox's sends today against its allowance, and the campaign's progress
Reply detected[email protected] · follow-up 2 cancelled
In Gmail Sent · 14 today

What it takes off your plate

Keep the personal part.
Hand off the repetition.

For founders, freelancers and small sales teams who choose their prospects, write their own messages and handle the replies themselves. Sending each message and tracking every follow-up should not take the rest of your afternoon.

Merge fields

Personalize without starting from scratch.

Write the message once, with fields from your list. ColdMerge fills them in for every recipient, email and follow-ups alike. Watch it move through the list, or pick a person.

To: [email protected]Email 1 · Day 0
Quick question about Meridian Ops
Hi Marcus, I noticed Meridian Ops is hiring for outbound. I built a small tool that runs cold email through Gmail with strict limits. Worth a short look?
Lena
Sent from [email protected] · 1 of 40

Keep follow-ups off your to-do list.

Choose the sequence and timing upfront. ColdMerge checks for replies and bounces so it can stop the remaining follow-ups when it detects either.

Manage your connected mailboxes together.

Run a campaign across several mailboxes from one place. ColdMerge distributes sends across them, subject to each mailbox's sending allowance.

Respect the people who opt out.

Campaign emails include an unsubscribe link. ColdMerge checks your suppression list before each send, so you do not have to maintain an extra “do not email” spreadsheet.

Campaign detail

A sequence that knows when to stop.

Each person moves through your sequence on their own timeline. The moment ColdMerge detects a reply or a bounce, the rest of that person's follow-ups are cancelled. Everyone else keeps going.

Day 0
Email 1 sent
Sent from [email protected]. Sits in Gmail Sent.
Day 3
Follow-up 1
Scheduled. Sends only if there is no reply.
Day 5
Reply detected
Watching the mailbox for a reply or bounce.
Day 7
Follow-up 2
Scheduled. Sends only if there is no reply.
Example recipient: [email protected] · demo dataPlays automatically. Dates and copy are illustrative.

Sending controls

Slower on purpose. Clear about why.

A new mailbox starts at up to 20 emails a day in ColdMerge. Its allowance grows gradually as it ramps up. You can set your own daily cap and choose the hours it sends in, with a randomized gap between messages.

If a campaign is waiting, you can see which sending limit is holding it back. You do not have to guess why the next email has not gone out.

ColdMerge does not use a warm-up pool or manufacture conversations from your mailbox. It sends the campaign messages you configure, through your connected Gmail account.

These controls govern sending volume and timing. They do not guarantee inbox placement or prevent Google from restricting an account.

[email protected]
Ramping up: days 1 to 3
Mailbox agefree Gmail address
20sends allowed today
12 sent today8 left
Sending window
Mon to Fri, 9:00 to 17:00
Gap between sends
Randomized, 10 seconds up
Cap once ramped
100 a day for free Gmail
Status
Sending within allowance

Ramp steps as ColdMerge applies them. A Workspace mailbox keeps climbing past 100. Counts are demo data.

Mailbox access

Know what you're connecting.

Connecting a mailbox is the biggest decision on this page. Here is exactly what ColdMerge asks for through Google's consent screen, what it does with it, and what it does not do.

Scope 1 of 3

Send email as you

Sends your campaign emails and follow-ups from the connected account. They appear in that account's Sent folder like any other message you send.

✕Never sends anything you did not put in a campaign.
Scope 2 of 3

Read-only mailbox access

Detects replies and bounces so ColdMerge can stop follow-ups. This permission covers reading mail in general, not only campaign replies.

✕No permission to modify, move or delete your messages.
Scope 3 of 3

Basic account information

Your email address and basic profile, used to identify the mailbox inside ColdMerge.

✕No contacts, calendar or Drive access requested.

You can revoke ColdMerge's access at any time from your Google Account permissions. Once revoked, ColdMerge can no longer send from or read that mailbox.

Compared

How ColdMerge differs from the alternatives.

Most of these send through Gmail too. The differences are where you work, how sending accounts are priced, whether a warm-up pool is involved, and how much control you get over pace.

Basis
ColdMerge
GMass
Mailmeteor
YAMM
Instantly
Where you work
Its own web app. Sends through your connected Gmail or Workspace accounts.
Chrome extension inside Gmail.
Gmail extension, Google Sheets add-on, or its own dashboard.
Google Sheets add-on, sending through Gmail.
Its own web app. Connects many mailboxes, Gmail and others.
What you pay for
Connected sending inboxes. Plans are priced by inbox count, not per person.
Per user (one Gmail account). Team plans priced by seat.
Per user.
Per user, billed yearly.
Monthly email volume and uploaded contacts. Sending accounts are unlimited.
Entry price
$19 a month for up to 3 inboxes.
$29.95 a month (Standard, since January 2026). Follow-up sequences from Premium, $39.95.
Free plan at 50 emails a day. Paid from $5.99 a month; follow-ups from Premium, $17.99.
Free plan at 20 recipients a day. Personal plan $25 a year.
$47 a month (Growth: 1,000 contacts, 5,000 emails a month).
Automated follow-ups
Included in every plan. Stops on reply or bounce.
Premium and above. Stops on reply.
Premium and above.
Included on every plan.
Included. Stops on reply.
Several sending inboxes in one campaign
Yes. Sends are distributed across connected inboxes, each within its own allowance.
Yes, MultiSend inbox rotation on Professional, $59.95.
Yes, inbox rotation on Professional, $35.99.
No. One sender per campaign; more volume means more accounts.
Yes, unlimited accounts with rotation on every plan.
Ramp-up and sending windows
Built in. A new mailbox starts at 20 a day and you can see which limit is holding a campaign.
Scheduled and repeating sends. Its pricing page does not describe ramp-up.
Scheduling on every plan, with Autopilot pacing from Starter.
Scheduled mail merges. Daily volume follows the Gmail quota.
Its pricing page does not describe per-account limits or ramp-up.
Warm-up pool
No, by design. No synthetic conversations from your mailbox.
Not on its pricing page.
Yes, from Premium.
Not on its pricing page.
Yes, unlimited warm-up is included and central to the product.

Competitor details are from each vendor's own pricing page, read on 14 September 2026, and may change. ColdMerge is not always the lowest-priced option: for a single mailbox, Mailmeteor's and YAMM's entry plans cost less. Instantly suits high-volume teams that want a warm-up pool; ColdMerge deliberately does not offer one.

Pricing

Choose how many inboxes you need.

Plans are priced by connected inboxes, not per person. Every plan includes follow-ups, ramp-up, rotation and suppression. Annual billing gives you 12 months for the price of 10.

Starter

$19/month

$190 a year

  • Up to 3 connected inboxes
  • Follow-ups, ramp-up, rotation, suppression
  • Sending is never metered
Start free trial

Growth

$49/month

$490 a year

  • Up to 10 connected inboxes
  • Everything in Starter, plus your own tracking domain
  • Sending is never metered

Need more than 10? $4 per extra inbox each month, so 15 inboxes is $69.See every inbox count

Start free trial
First 50 paying customers

Your first campaign, set up with me. A 45-minute call with the founder: bring your Gmail account, a prospect list and a draft message, and we connect your mailbox, import your list and configure the sending window and follow-ups together. If something needs fixing before you send, we find it on the call.

Trial details

Written out here, not hidden in a tooltip.

Length14 daysNo card required.
InboxesUp to 10Connect up to 10 inboxes, depending on the plan you choose.
Trial sendsUp to 500500 recipients for most accounts, or 100 for a free mail address or a brand-new domain. Billing shows yours.
After day 14Sending stopsUpgrade any time to keep sending, or cancel from the billing page.
Not includedVerificationEmail verification credits are bought separately, on every plan.

FAQ

Before you connect your mailbox.

Straight answers to the questions that matter most before you hand a tool your sending account.

You manage campaigns in ColdMerge and connect the Gmail account you want to send from. Campaign emails appear in Gmail Sent, and replies arrive in your usual inbox.

Put your next campaign in motion.

Write the messages. Set the follow-ups. Handle the replies in Gmail.

Start free trialSee how it works

14 days free. No card required. Sends from your own mailbox.