ReplyKit: AI Reply Generator & Radar for X

Find the X (Twitter) posts worth replying to, then draft a reply 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 drafts a reply that actually answers the post. Edit it if you want, then post. NEW IN 3.3.1: 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 a draft 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 whose posts always surface. 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. 8 TONES FOR REPLIES Support, Analyze, Witty, Inform, Question, Challenge, Humor, or Custom. Pick a different angle per post, or hit Retry for another take on the same one. IT READS THE POST FIRST ReplyKit looks at the post you're answering and the conversation above it, then writes something that fits. It replies in the language of the post. It also avoids the stock phrases that give away AI writing ("great point!", em dashes), so replies come out specific instead of interchangeable. 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. POST TEMPLATES ON X For your own posts, not just replies: Hot Take, Story, Lesson, Question hook, Data Drop, and a Contrarian thread that writes 3 to 5 tweets. Threads go straight into X's composer, one tweet per box. Some templates are Pro only. POLISH MY DRAFT Got a rough thought? Type it in the reply box 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 UNLIMITED WITH PRO 6.99 €/month removes the daily cap, adds every template, and switches you to Claude Sonnet, a stronger model that writes sharper drafts. Pro also unlocks the Radar list, a ranked shortlist of the best posts you've scrolled past, plus target accounts whose posts always surface. 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. Feedback and bug reports are read and answered.