FastPost AI
FastPost AI is an AI tweet generator that learns your writing style and turns any idea into an X post in seconds.
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Description
FastPost AI is an AI tweet generator that learns your writing style and turns any idea into an X post in seconds. Grow on X without writer's block. Free to start.
About FastPost AI
What is FastPost AI?
FastPost AI is an X post and reply generator that uses a writing style profile built from existing posts.
What FastPost AI does
FastPost AI analyzes a user’s tone, structure, emoji usage, and writing patterns to generate posts from rough ideas. It suggests topic-based ideas and supports regeneration. A paid Chrome extension generates replies inside X using the trained style profile.
Who FastPost AI is for
X creators who regularly publish posts and replies can use the web app and Chrome extension to draft content based on their existing writing.
How FastPost AI works
The user pastes 10 to 15 existing X posts for style analysis, then enters a rough idea. FastPost AI generates a post that the user copies and publishes. Creator users can open the reply generator in the X compose box, generate a reply, and insert it.
Key features
- Style analysis uses the user’s existing posts.
- Rough ideas can be a few words or a sentence.
- The tool suggests 6 post ideas tailored to the user’s topics.
- Regeneration creates another version of a post.
- Post generation handles character limits, hooks, calls to action, hashtags, and mentions.
- The Chrome extension opens reply generation inside X.
- Free includes web app access and full style and topic analysis.
- Creator includes unlimited posts and replies without daily caps.
Pricing
As listed on fastpostai.xyz, checked 14 October 2026. Prices can change; see the site for current terms.
- Free: $0 forever.
- Creator: 7 days free, then $6.99 per month.
Facts from fastpostai.xyz, checked 14 October 2026
- Users publish generated posts themselves.
Written from FastPost AI's own website (Homepage, Pricing). The maker can claim this listing to edit it.
Categories
Frequently asked questions
What is the Free daily allowance?
Free includes 5 AI posts and 10 AI replies per day.
Is the extension free?
The Chrome extension is a Creator plan feature and is not included in Free.
Do regenerated posts count toward usage?
Each generated post counts as one, including regenerations.
When does the daily allowance reset?
The daily limit resets at midnight UTC and unused generations do not roll over.
Can Creator be cancelled?
Creator can be cancelled from account settings without a lock-in.
Does the trial require a card?
The pricing FAQ says a card is requested upfront and cancellation before the 7-day trial ends prevents a charge.