ReplyKit: AI Reply Generator & Radar for X

Find the X (Twitter) posts worth replying to, then get 3 reply drafts in your voice in one click. 10 free on day one, no API key.

Small X accounts grow in the replies. You show up under bigger posts with something worth reading, people tap your name, some of them follow. The hard part is knowing which posts are worth it, and writing 20 good replies a day without it eating your evening or sounding like a bot. ReplyKit does both, right inside X. Opportunity Radar marks the posts worth answering as you scroll, and one click gives you three replies that actually answer the post. Pick one, edit it if you want, then post. NEW IN 3.4.0: ONE REPLY BUTTON, THREE DRAFTS Hit ✨ Reply and ReplyKit reads the post, then picks the move that fits it: a joke about one exact detail, a true insider fact, a counterexample, a question worth answering, or agreement with something added. Three different drafts stream in side by side. Pick one and hit Insert (or Copy), or Retry for three new ones. Want a particular angle? Tap a chip to steer it: Funny, Insight, Agree or Push back. REPLIES THAT SOUND LIKE A PERSON The reply writing was rebuilt from scratch and tested against real posts. Drafts are short, usually one sentence, and about this post rather than any post. They read like a sharp person in the replies, not an assistant: no lecturing the author, no punching down, no made-up stats, and none of the tics that give away AI writing (em dashes, "it's not X, it's Y", "great point!"). ReplyKit replies in the language of the post, and it looks at the conversation above it too. Every plan, free included, writes with Claude Sonnet. OPPORTUNITY RADAR Opportunity Radar marks the posts in your feed that are worth answering right now: in your niche, from accounts with a real audience, and early enough that your reply still gets seen. Each badge shows the author's follower count and how crowded the replies are, and it skips tiny accounts (you choose the floor: 1K, 10K or 100K followers). One click opens the reply with drafts already written. Everything runs in your browser and nothing is posted for you. Pro adds the Radar list (a ranked shortlist of the best posts you scrolled past) and target accounts, handles that always count as on-topic. FREE TO START Radar badges are free for everyone. 10 free replies on your first day, then 3 a day with no account. Sign in with your email (a one-time code, no password) and you get 5 a day. No API key, no credit card. YOUR TOPICS, YOUR VOICE Tell ReplyKit what you post about (crypto, trading, SaaS, AI, your industry) and it uses that to find posts in your niche, to colour replies, and to suggest ideas when you start a post from an empty composer. YOUR OWN POSTS TOO Open an empty composer on X and ReplyKit drafts three posts from an idea built on your topics. Prefer threads? Turn on Threads in settings and you get one thread instead, which goes straight into X's composer, one tweet per box. POLISH MY DRAFT Got a rough thought? Type it in the reply box, hit Polish my draft, and ReplyKit tightens it while keeping your point. ALSO WORKS ON LINKEDIN AND REDDIT The same panel shows up under LinkedIn comments and Reddit replies, with a style tuned to each: professional on LinkedIn, casual on Reddit. GO PRO 6.99 €/month replaces the daily cap with 1,000 replies a month. Pro also unlocks the Radar list, a ranked shortlist of the best posts you've scrolled past, plus target accounts, handles that always count as on-topic. Replies are written the same way on every plan; Pro gives you more of them and a better view of where to post them. Cancel anytime. PRIVACY Generation runs through our hosted service, so there are no API keys to manage. To improve quality we may log prompt/reply pairs with no personal identifier attached, only a plan label. We never see your name, your X account, or the URL of the post. - ReplyKit is built and maintained by one developer. Found a bug, or a reply that missed? Hit 💬 Feedback in the reply panel (you can attach the post and the drafts) or use the Feedback card in the popup. It goes straight to the developer, and it gets read.