A few years ago you could spot an AI voice in one word. Now the best ones are hard to tell from a calm human narrator. And yet a lot of AI-narrated product videos still feel slightly wrong. The voice is fine. The sentences are not.
Here is what gives AI narration away, and what to do about each one.
What makes AI voiceover sound fake
Sentences written for the eye
"With our intuitive, AI-powered dashboard, you can effortlessly track, analyze, and optimize your team's performance metrics." Read that out loud. Nobody talks like that, and a voice reading it word for word sounds exactly like a voice reading a brochure. Write the way you would explain it to a colleague: "This is your team's dashboard. Everything that slipped this week is at the top."
Things a voice has to guess
Numbers, dates, prices, abbreviations, URLs, and product names. Is "1/2" a date or a half? Is "SSO" said as letters or as a word? How do you say your company name? A voice will make a confident guess, and a wrong guess on your own product's name is the fastest way to sound fake. Write these the way they are spoken: "twelve forty euros", "S S O", "steper-lee".
Narration out of sync with the screen
The voice says "click Export" while the cursor is still on its way to Settings. Or the click happens, the screen changes, and three seconds later the voice catches up. Humans narrate what is happening as it happens. Each line should start just before the action it describes.
One flat mood for everything
Some voices default to upbeat. That works for a 30-second launch clip and grates in a tutorial about resetting a password. Pick a voice and a delivery that fit the job. For most help and onboarding content, calm and clear beats enthusiastic.
Music fighting the voice
Background music at the same level as the narration makes any voice harder to follow, and it makes AI voices sound thinner. Keep music low and let it dip under each spoken line, or leave it out of tutorials entirely.
Writing lines that sound human
- One idea per sentence. Eight to fifteen words is a comfortable spoken length.
- Use contractions: "you'll", "it's", "don't". Their absence is one of the most common tells.
- Speak to one person: "you", not "users".
- Do not read lists. Three items in a row sound like a list being read. Show them on screen and say the one that matters.
- Leave silence. A beat after an important click lets the viewer look, and it makes the narration feel considered.
- Read every line out loud yourself once. If you would not say it, the voice should not either.
| Written for reading | Written for listening |
|---|---|
| Navigate to the Settings menu and select the Billing tab. | Open Settings, then Billing. |
| Users can leverage filters to refine results. | Filter the list down to what you need. |
| The export will be delivered within 24 hours. | You'll get the export by email, usually within a day. |
| Click on the + icon. | Click the plus button. |
When to use your own voice
AI voice is the right default for a library: help articles, onboarding, release clips. It sounds the same in every video, it can read a changed line without a new recording session, and it can speak other languages. For a growing set of videos that need to stay current, those things matter more than personality.
Your own voice is better when the video is personal. A founder introducing the product at launch. A sales follow-up recorded for one prospect. A thank-you to a customer who asked for a feature. In those, an AI voice would feel like a form letter.
Should you say it is AI?
There is no single rule for product videos, and expectations are still forming. Many teams simply do not pretend: they never present the voice as a specific person, and they say so if a customer asks. What matters most is that the content is accurate and the voice never claims to be someone it is not.
In Steperly
Steperly narrates every guide in one voice, either an AI voice or your own. Narration lines stay editable, so a changed button name means changing a sentence, not recording the video again. If you translate a guide, the narration comes in the new language too. For scripts, start with our demo video script templates, and see how to translate product videos if you narrate in more than one language.