Autonomous outbound for early-stage companies

Your AI SDR
never sleeps.

ColdOS researches your prospects, writes personalized cold emails, runs full sequences, and follows up — around the clock. You approve. It works.

10x faster outbound than a human SDR
$0 in salary — just results
24/7 always working, never burns out
Sent — 3 hours ago
sarah@coldos.ai
Quick question about [Company]'s growth

Hi [First Name],

I noticed [Company] just raised a Series A. Congrats. Most startups at that stage hit the same wall: getting the next 50 customers without burning through runway on cold hires.

We've been helping teams like yours book 15+ demos/month through outbound — without adding headcount. Happy to share what's working.

Worth 15 minutes?

— Sarah

Opened Replied
How it works

One prompt. Full pipeline.

01

Tell it your ICP

Define your ideal customer profile — industry, company size, role, funding stage. ColdOS learns who you're after.

02

It researches the prospects

Scans LinkedIn, company pages, news, and job postings to find active signals. Knows who to reach and when.

03

Writes and sends

Generates personalized cold emails that sound human — not AI-generated filler. Sends from your connected inbox.

04

Follows up. Reports back.

Runs full sequences automatically. You get daily digests of opens, replies, and qualified leads.

The math is simple.

One human SDR costs $70K/year. ColdOS runs for a fraction of that — and never calls in sick.

500+
Prospects researched per week
12%
Average reply rate (industry avg: 3%)
3.2
Meetings booked per 100 emails sent
Common concerns
"Won't cold emails feel robotic?"
ColdOS trains on your brand voice and researches each prospect deeply before writing. The emails are personalized to real signals — funding rounds, job postings, recent news. Recipients consistently mistake them for hand-sent.
"What if it sends something wrong?"
You approve the campaign before anything goes out. ColdOS shows you the full email sequence, lets you edit anything, and won't send until you give the green light.
"Will this hurt my email deliverability?"
ColdOS manages warmup, rotation, and sending limits automatically. It follows deliverability best practices so your domain stays clean and your emails land in inboxes — not spam.
"How long until I see results?"
First outreach goes out within 48 hours of setup. Replies typically start within 3-5 business days as sequences run their course.

Outbound isn't broken.
Your tools are.

Every competitor sells you a spreadsheet with better UX. ColdOS is the first outbound platform that actually does the work. Stop managing tools. Start building pipeline.