Cold Email that Lands

Built for outreach that earns trust and gets real responses, at any scale.

$0.01per verified lead
Freewarmup on every inbox
Autofreeze on complaint spikes
What You Get

Everything that
keeps your emails landing.

01

Warmup pool

Every inbox joins a private pool and trades real conversations until providers trust it.

02

Paced sending

Sends leave on human rhythm and throttle back the instant replies or bounces move.

03

Reputation guard

A monitor freezes a mailbox on its own before a reputation slip reaches your other sends.

04

Verified leads

Every lead is checked before it is mailed, so you never burn a warmed sender.

How it works

What happens behind every send.

01

Connect

Connect one or more sending inboxes in a few steps. A warmup period of around 14 days is recommended before the first campaign, giving each new address time to build a trusted sending history with email providers.

02

Send

Campaigns are sent at a natural, measured pace rather than all at once. Throughout, the system tracks reputation, spam complaints, bounces, and blocklists, and pauses any inbox automatically before a problem can spread.

03

Adjust

An AI layer continuously fine tunes volume, timing, and targeting based on how recipients respond. It learns what earns replies and shifts effort toward the inboxes and messages that perform best, so results improve the longer you send.

One screen,
every signal.

See the health, sending pace, and warmup of every mailbox at once, updated continuously as your outreach runs.

Inboxes
Live
AB
ava.bennett@getfrost.io
Ava Bennett
Connected18/20 sent96%
NC
noah.carter@getfrost.io
Noah Carter
Connected20/20 sent91%
MD
mia.donovan@getfrost.io
Mia Donovan
Connected16/20 sent93%
LF
liam.frost@getfrost.io
Liam Frost
Connected19/20 sent97%
EH
emma.hale@getfrost.io
Emma Hale
Connected14/20 sent92%

Every inbox is scored in real time. If a reputation problem appears, the system pauses that inbox automatically while warmup continues, so one issue never affects the rest.

frostsender / internals

Nine stages. No black box.

Every address you upload and every email you send runs through the same hardened pipeline. Here is the entire path, stage by stage.

pipeline · frost@core
frost@core:~$ frostsender trace pipeline
# 9 stages, one path, every send
00ingest
csv parse, mx lookup, syntax gate, dedupe on (list, email)
01verify
smtp rcpt probe, catchall detection, disposable filtering
02warmup
peer pool reputation seeding, linear ramp to send cap
03queue
bullmq on redis, per inbox token bucket, jittered cron
04transport
nodemailer, gmail oauth2, spf/dkim/dmarc aligned
05watch
imap idle, reply threading, bounce classification
06score
rolling reputation 0..100, rbl sweep across 7 lists
07guard
complaint rate breaker, auto freeze via coldPausedUntil
08suppress
append only do not contact ledger, enforced globally
runtimenext.js · postgres · redis · bullmq · prisma · nodemailer · imap
frost@core:~$
Pricing

Pay per lead. Nothing else.

One dollar for every hundred leads. No subscription, no seat fees, and warmup is always free. Drag the bar to size it to you.

Your cost
$500.00one time

50,000 verified leads at one dollar per hundred. You only pay for what you send, and warmup never counts against you.

Start free
Leads50,000
1k1M
$0.01
Per lead
$1.00
Per 100 leads
Free
Warmup

Ready to land in
the primary inbox?

Warm your inboxes, send your first verified leads, and let the monitor do its job. If it does not reach real people, you have spent nothing.

No credit card. Warmup is always free.