New domains often look suspicious to ISPs. SendScale's proprietary AI warms up your accounts on autopilot, and utilizes its Automated Reputation Defender to turn cold domains into trusted senders while you sleep. Access over 1MM pooled accounts for warm up.
To algorithms like Google's AI, a new domain or email account sending cold outreach goes directly to spam. To bypass this, you need to build reputation fast.
Peer-to-Peer Network
Your account joins our private network of millions of secure, high-reputation inboxes.
Smart-Conversation Simulation:
Our proprietary AI sends unique, human grade emails between accounts. It opens them, scrolls through them, and replies to them using human, non AI language.
Spam "Rescue" Protocol:
This is critical. If a warmup email lands in the Spam folder, SendScale automatically pulls it out, marks it as "Important," and replies to it. This signals to the ISP that "This sender is relevant, put them in the primary inbox."
Sendscale's health score dashboard optimizes your content and schedule so there is no guessing whether you are ready to send or not.
Warmup Status
See exactly how many warmup emails were sent and replied to today.
Placement Rates:
Are you landing in Spam or Inbox? We visualize the trend line.
Ready Indicator:
We recommend a 14-day warmup period for new domains. Our dashboard tells you exactly when that period is complete and when it's safe to launch your campaign.
Seamlessly integrated tools for prospecting, outreach, and pipeline management. Get everything you need to close more deals in one powerful platform.
Lincoln Choi
Founder
SendScale's pre-warmed inboxes let us send at volume without worrying about deliverability, saving us weeks of setup time and costs.
Valerie Stowers
Marketing Manager
SendScale made it easy to deploy multiple inboxes for our campaigns. Our emails now land in the inbox over 50% of the time, tracking our results easily in the SmartBox.
Georgia Raber
SDR Representative
I can finally reach the volume needed to hit our targets without burning inboxes, all while keeping campaigns running smoothly.
Andrew Mokotov
Founder
We went from 5 inboxes to over 100 in just a month, giving our startup the infrastructure to grow our pipeline aggressively without adding headcount.
Willow Blankenship
Recruiter
SendScale allows me to safely reach hundreds of candidates daily while keeping our sending domains healthy. It's a game-changer for outreach, and it's only continuing to grow.
Jane Gavic
Head of Accounts
Now my agency can finally run high-volume outbound campaigns that deliver results. Pre-warmed inboxes and unified management are life savers for our lean team.
1M+
Emails Delivered
78k+
Marketers & SDRs Trust Us
99.5%
Inbox Rate
10M+
Inboxes Generated
Warmup isn't a one-time task, it's a lifestyle for your domain
Even when your campaigns are running, SendScale continues warming in the background (at a lower volume) to counteract any negative signals from your cold outreach. This helps maintain a healthy sender reputation and keeps your emails landing in the inbox, not spam.
Enable Sendscale's reputation defender when launching email campaigns to make sure your offering gets seen, not forgotten.
Cold outreach creates negative signals that can quietly push your emails into spam. SendScale works in the background to neutralize those signals and protect your sender reputation. The result:
Get everything you need to deploy, warm, and manage outbound email

28,000+ NEW EMAIL ACCOUNTS, 3,000+ NEW LEADS
"Scaling outbound was a constant struggle before SendScale. Managing inboxes, warming accounts, and protecting deliverability took more time than actually running campaigns. With SendScale's pre-warmed inbox infrastructure and done for us accounts ready to go, we were able to scale our sending safely and generate a far more consistent pipeline without adding operational overhead."
Michael Lawson
Digital Marketing Director
Rated
10/10
Ease of Use
Industry Average: 8.7
Rated
9.8/10
Support Quality
Industry Average: 8.5
Rated
9.7/10
Setup Process
Industry Average: 8.4
SendScale is a comprehensive cold email outreach platform that helps you automate email warm-up, manage campaigns, and track results. It's built to help businesses scale their outreach without compromising deliverability.