The AI post writer for people who post as themselves
Tell Postmosis what you do and paste a few of your posts, once. Then pick a hook, get three versions and edit before anything goes out.
Your posts, drafted for you to edit
Hooks first
You know the topic but not the first line. Write shows you a few hooks first, with one marked as recommended. Pick one and get three versions of the post.
Your voice, from your own posts
ChatGPT drafts sound like everyone else's. Postmosis drafts from the posts you pasted, so yours read like you wrote them.
Written for what you do
Tell Postmosis what you do, in a word or your own phrase. Posts, carousels and shot lists are all written for that work.
Write the post, the slides or the script
Write a text post, the words for a carousel, or a video script with its caption.
One topic, a post for each network
Batch takes one topic and writes a post for each network you pick, so one idea fills more than one slot.
Checks before you copy it out
Before you copy a post out, Write checks that it reads like a person wrote it and fits each network's character count.
From a topic to a finished post
Say what you do
Add what you do to your brand, and paste a few of your posts for your voice.
Pick a hook
Give Write a topic, choose the network and the format, then pick the hook you like.
Edit and post
Keep the version that sounds most like you, edit it, then copy it out or schedule it.
Common questions
Start my weekWill the posts sound like me?
They start from you. Write uses what you do and the posts you pasted, and you edit every draft before it goes anywhere.
Which networks does it write for?
LinkedIn, Instagram, Facebook and TikTok. Pick one before it writes, or use Batch to get a post for each.
Does it write captions and video scripts?
Yes. Choose a short-video script and you get the script and its caption. The shot list then splits the script into the shots to film.
Does it make hashtags?
Yes. Every draft comes with hashtags, and the hashtag rules in your brand kit apply to them.
Will it make things up?
It's built not to invent numbers, results, client stories or testimonials, and it flags any line worth checking.
How is it different from Taplio or Supergrow?
Taplio and Supergrow write for LinkedIn. Postmosis writes for Instagram, Facebook and TikTok too, then helps you turn the post into slides or a video in the same place.
Can it post for me?
Yes, once your accounts are connected. Schedule a post from Write or the calendar, or copy it and post it yourself.
Related features
Video editor.
Cut the pauses in your phone videos and add captions, all in your browser.Carousel maker.
Turn a post into slides in your colours, without an hour in Canva.Scheduling.
Schedule your posts from the calendar, or post one now.
Get next week's posts written
See the price, start, and make your first posts this week.