Better captions. One click.
Seven AI actions built right into the composer and edit dialog. Fix grammar, tighten the copy, expand, rephrase, restructure, simplify, or polish all powered by Claude without leaving the compose window.
The grind of cross-posting, gone.
Writing is the bottleneck
The hard part of consistent posting isn't the scheduling it's staring at a blank text box. AI assist gives you a starting point or polishes what you already wrote, in seconds.
Platform tone varies
LinkedIn needs professional. Bluesky needs casual. Twitter needs punchy. Use Rephrase or Simplify to adapt one base caption to the platform you're posting to.
No context switching
The AI button lives inside the composer and the edit dialog. You don't open a new tab, paste into ChatGPT, copy back. It rewrites in place.
Three steps.
No manuals.
- 01
Write your caption
Type your post in the composer as you normally would. Even a rough draft is enough AI assist will clean it up.
- 02
Click the sparkles button
Hit the ✦ button above the textarea. A menu of seven actions appears: Fix grammar, Concise, Expand, Rephrase, Improve structure, Simplify, Polish.
- 03
Pick an action
Select the action you want. Posthive sends your caption to Claude Haiku and replaces the text with the improved version in under two seconds.
Built for people shipping in public.
- ◆Creators who batch-write content and want a final polish pass
- ◆Non-native English speakers who want grammar and clarity checks
- ◆Founders who know what to say but need help saying it concisely
- ◆Teams shortening long LinkedIn posts to fit Bluesky's 300-char limit
“I was copy-pasting the same post into five different apps every day. Every tool I tried was too expensive, too bloated, or didn't support the platforms I actually used. So I built Posthive.”
Frequently asked questions
Which AI model powers the caption assist?+
AI caption assist uses Claude Haiku (claude-haiku-4-5) by Anthropic fast, accurate, and cost-efficient for short-text rewrites.
Does AI caption assist cost extra?+
No. It's included in all paid plans (Creator, Pro, Team). If you self-host, bring your own Anthropic API key via the ANTHROPIC_API_KEY env var.
What are the seven actions?+
Fix grammar, Concise (shorter), Expand (more detail), Rephrase (fresh take), Improve structure (better flow), Simplify (plain language), Polish (professional finish). Each rewrites the caption in place.
Does it work in the edit dialog too?+
Yes. The AI button appears both in the main Compose page and in the Edit Post dialog so you can refine already-scheduled posts.
AI caption assist is one of eight features working together.
Start scheduling for free.
14-day free trial. No credit card required. Connect your first account in under a minute and schedule your first post today.