XposterAI: AI reply generator for X/Twitter

Grow on X (Twitter) without sounding like a bot. AI reply generator with personas trained on your real tweets — reply in seconds.

XposterAI is an AI reply generator for Twitter / X. It writes replies and quote tweets in your own voice, right inside the X composer. Train a persona on your real tweets and every reply sounds like you wrote it — not like a bot. Built for people who want to grow on Twitter / X without the writing burnout. Core features: • Instant AI replies for X (Twitter) in witty, professional, or custom tones — right-click any tweet to switch tones on the fly. • Generate 3 reply variants at once with one click — pick the strongest, post it, done. • Reply Strategy selector — pick the conversational move (ask a question, contrarian angle, add example, personal anecdote, soft promo, agree + add insight) on top of tone, so replies actually move conversations forward. • Improve any variant — rewrite in one click as Punchier, Less formal, Add question, More specific, or Funnier, without burning all 3 credits. • Save the replies you actually post — bookmark winners and build a swipe file of what works for your audience. • AI-crafted quote tweets. • Voice-trained personas — train on your own tweets at xposterai.com so every reply sounds like you wrote it, with trained-status badges and a freshness reminder when one's overdue for a refresh. • Per-persona language support — reply in your audience's language while keeping your voice. • Your dashboard default is the extension default — the persona you mark with ★ is auto-picked. • Extract t.co source links for clean, credited reposts. • 30 free credits to start, no credit card required. • Premium: 3,000 credits / month + priority support. • Privacy-first: no tracking, no selling your data. Bonus: 20+ free companion tools for Twitter / X creators on xposterai.com — character counter, thread splitter, hook analyzer, Twitter archive viewer, and more. No signup required. Made for X / Twitter creators who want better replies, faster, in their own voice.