Rainmaker.
Free tool · nothing to sign up for

Paste a cold email. See which lines need a source.

A simplified version of the rule the product applies, on your text. It flags every sentence that states something checkable - those are the ones a prospect can push back on.

0 words
Runs entirely in your browser - the text never leaves this page.
Sentence checkwaiting
0
Sentences
0
Need a source
0
Fine as written
Nothing to check yet
Paste an email on the left, or load the example to see what a typical AI draft gets wrong.
What it looks for

Claims, not grammar

A sentence gets flagged when it asserts something your reader could check and disagree with. Questions, offers and descriptions of your own product pass - they aren’t claims about their world.

Flagged
Money and numbers · funding, headcount, growth · superlatives like “fastest” or “leading” · claims about what they’re doing or planning · named customers · “I saw that you…”
Passes
Questions · what you do and offer · opinions clearly marked as yours · anything already carrying a link
About the tool

What the grader does, and does not do.

What does the email grader check?

The grader reads each sentence of a cold email and flags the ones that state a fact about the recipient or their company without a source to back it. It is a simplified version of the sourcing rule Rainmaker applies to agent-written emails before they reach your approval queue. It does not score deliverability or subject lines.

Is the email grader free?

Yes. No account is required. Paste a cold email and see the flagged lines instantly, in your browser.

In the product, the flagged lines get fixed instead of counted

This page tells you which sentences are exposed. The agent goes further: it finds the public page that backs the claim and attaches it, or rewrites the line so there’s nothing to back - and it can’t approve the draft until one of those is true.