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SignalEngineby SignalSprint
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Is your lead list + cold email actually any good?

Paste your list and your cold email. We check every company for real buying signals — news, hiring, ads — and grade your copy for deliverability and reply rate. Know what you're sending before you send it.

In the news
checked
Actively hiring
checked
Running ads
checked
Email copy grade
checked

Scanning this manually takes hours of research. This does it in seconds — and grades your email copy at the same time.

Optional — but you'll get much sharper, fit-for-you results.

We'll scan what you sell so we can score each lead for YOU.

or pick what you sell

One company per line — Company,Website (CSV header optional). We grade the first 30 free.

Paste the email you plan to send. We check it for trigger words, weak hooks, missing personalisation, and deliverability killers.

We scan each company for real buying signals — news, hiring, Meta ads, reviews, and fresh content. Your lead list is used only for this audit and is never sold or shared.

How it works

1

Paste your lead list

One company + website per line (CSV works too). We scan each company for live buying signals — news, hiring, Meta ads, reviews, and fresh growth content.

2

Paste your cold email

Optional but worth it. We check your email copy for trigger words, missing merge fields, weak hooks, and other patterns that tank reply rates.

3

Get your grade in seconds

You get a letter grade for your list (hot/warm/cold breakdown) and your email copy — plus the specific signals that explain each lead's score.

Why most cold outbound doesn't convert

Two problems kill cold email performance: wrong targets and wrong copy. Most senders only fix one. This tool finds both in one pass.

Most lead lists are 80% cold

The average purchased or scraped list has fewer than 20% of companies showing real buying signals. Knowing which are which before you send saves you from burning sender reputation on contacts who will never reply.

Your email copy might be killing deliverability

Trigger words, missing personalisation, weak CTAs, and vague openers all hurt reply rates and inbox placement. Paste your cold email and see exactly what's dragging it down.

One bad batch poisons your domain

Sending to cold, unresponsive companies drives up your bounce and spam rates. A single high-volume blast to a cold list can damage your domain reputation for months.

SignalEngine

Graded the list.
Now run it on autopilot.

SignalEngine finds your next hot leads automatically — scanning for news, hiring signals, and ads every day — then sends warm outbound that gets replies, not spam flags.

  • Finds in-market leads daily — no manual list-building
  • Writes and sends cold email copy that passes spam filters
  • Monitors your domain health and adjusts send volume automatically
  • Tracks replies and hot leads so you call them first
Start your free trialHow SignalEngine works