A cold email outreach sequence is the first email plus the follow-ups that go to the same person, in order, until they reply or the steps run out. Each email can read fine alone while the sequence fails: the third email repeats a line from the first, or a [first name] nobody filled in goes out as typed. Those problems only show when you read the steps together, which is what the checker above does. It runs in your browser, and nothing you paste is sent or saved.
How to paste a sequence
Put every step in one box, with a line of --- between steps or a line such as "Email 2" at the start of each. Start a step with "Subject:" when it has one. The first email opens the thread and needs a subject; a follow-up sent as a reply can leave it out.
How to read the findings
Each step gets its own findings, each with a quote from your text and why it matters. Some are things a prospect or a filter will notice, and some are worth a second read.
Repetition is the one no single-email check sees. A follow-up written in one sitting is often the first email again under a new opening line, and the reader recognises the sentence. The checker flags the same sentence, or one that shares nearly all its words with an earlier one, and leaves new wording of the same point alone.
The thresholds are the ones Oneprofile applies to its own sequences. The dash rule also cites Wikipedia's guide to signs of AI writing. The phrase lists that trigger spam filters are not published.
What to do next
Fix what will break, read the rest, and paste again until every step comes back clean. For how many steps to send and how far apart, read cold email sequence steps, timing and examples. To vary a line across contacts, use the spintax generator.
In Oneprofile, these checks run as you write each email step and on every email the agent writes. At launch, a sequence waits until every first email has a subject and every hand-typed placeholder is a variable. The email steps guide covers the composer.