Writing
How to write a follow-up email that gets a reply
When to send a follow-up email, what to write after an interview, to a quiet client or to a colleague, which subject lines work, and when to stop.
Notes on AI detection, writing and what our numbers mean
Short articles from the team behind the tools. How a result is produced, what it can and can't tell you, and what we changed along the way.
AI detectionWritingHow we testProduct
All articles
Writing
How long should a cover letter be? Word counts that get read
One page, 250 to 400 words, three or four paragraphs. How the right length changes for internships, senior roles, academic jobs and email applications.
What you'll find here
Practical notes from our work, not press releases. Any number in an article comes from the test set described on our accuracy page, and the article links to it.
How accuracy is measuredWhat you won't find
Tips for getting past a detector. A detector is a measuring tool, and these articles are about reading its results well, not about beating it.
How we write and fact-check articlesSee how the detector reads your text
Paste any text to get one score, its margin and a mark on each sentence.