AI reply engine
Replies in your voice, right in X's reply box
Your thoughts, your tone
Type a half-formed thought, pick a tone, generate. The tone you pick is remembered, so the popover opens ready to go. With instant mode on, the pen writes with your last-used tone in one click.
It reads the room, and sounds like you
Drafts are grounded in the full conversation — the post, the thread above it, quoted posts — and shaped by your own recent posts, so they carry your voice. Replies match the language of the post, and the usual AI tells are filtered out by design.
Built for replying early
X pays for early, substantive replies on rising posts. Discovery's Early Bird mode surfaces them minutes after they go up; View drops you on the post, and your reply is drafted before the moment passes.
What you get
- Three buttons in every reply box: automations, AI pen, and voice (any language → English). The same voice button sits on the Messages / Chat compose box.
- Optional thoughts plus six tone presets, remembered between uses
- Full-thread context: the post, the conversation, quoted posts
- Your recent posts as voice reference — never quoted verbatim
- Translate in place, language matched to the post, AI tells filtered out
- Open & draft: View on a Discover card opens the composer for you
Common questions
Will the replies sound like a bot?
They are written in your own posting voice, with a blocklist of AI tells — opener filler, em dashes, brochure words like unlock or leverage, networking clichés — and a guard that keeps every reply distinct from your recent ones. You always see the draft before it posts.
Does it reply in other languages?
Yes. Each reply matches the language of the post you are replying to, falling back to your account's usual language when the post is unclear or mixed.
How many replies can I generate?
Free accounts get 5 AI replies or remixes a day (shared pool — the pen, voice input, and translate each spend one), Pro raises it to 150, and Max to 400. Your live counter is in the panel's account menu.
What is Buyers, and how many analyses do I get?
Buyers finds people on X who look like buyers. Paste a homepage; we search X, group accounts into watch lists, and seed reply templates. Each successful analysis spends one turn: Free 2/month, Pro 20/month, Max 50/month. Planner is a separate pool.
Can Claude Code schedule posts from the terminal?
Yes. Generate an API key in Settings, export SENT2X_API_KEY, then run sent2x create --at. Buffer has a GraphQL CLI for multi-network queues (May 2026). Typefully is REST-only. Replies stay human-in-the-loop — you see the draft before it posts.
How much does Sent2X cost versus Buffer or Typefully?
Sent2X is Free $0 (10 posts/month), Pro $39 (500 posts, 150 AI replies/day), Max $59 (750 posts, 400 AI replies/day). Buffer Essentials is $5–$6 per channel. Typefully Free is 15 posts/month on one social set. Full tables: /blog/buffer-alternative and /blog/typefully-alternative.