According to AlphaMoat, as of 2026-09, the Chrome extension ReplyX has 124 users (+6% MoM) — ranked #3,888 of 9,324 AI browser extensions, and #336 of 888 in Marketing & Sales.
What is ReplyX
Free AI-powered auto reply for X (Twitter). Grow your audience with smart, contextual responses. Powered by Claude AI. REPLYX – FREE AI AUTO REPLY FOR X (TWITTER)
ReplyX is a free Chrome extension that automates your X (Twitter) engagement with intelligent AI-powered replies. It uses Claude AI to generate natural, contextual responses that help you grow your audience, increase visibility, and build real conversations automatically.
Stop wasting hours manually replying to tweets. ReplyX handles engagement for you so you can focus on creating content, growing your brand, and building in public.
KEY FEATURES AI-Powered Auto Replies
Generate human-like, contextual replies using Claude AI. Every response feels natural, relevant, and personalized. No robotic templates or spammy automation.
Custom AI Prompts
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Define your own tone of voice, writing style, and engagement strategy. Full control over how the AI replies so it matches your brand perfectly.
Smart Topic Filtering
Engage only with tweets that matter to you. Target specific keywords and niches such as AI, startups, SaaS, tech, crypto, or any custom topic.
Account Block List
Prevent replies to competitors, bots, or unwanted accounts. You decide exactly who ReplyX interacts with.
Reply History Tracking
Never reply to the same tweet twice. ReplyX remembers all previous replies, even after closing or restarting your browser.
Clean Dark Interface
Modern, fast, and easy-to-use dark UI. Configure everything in seconds directly inside X.com.
WHO IS THIS FOR?
- Content creators who want higher engagement and faster follower growth
- Founders and entrepreneurs building in public
- Marketers and agencies scaling X engagement efficiently
- Anyone on X who wants to save time while staying active
HOW IT WORKS
Install ReplyX and open the side panel on X.com
Add your Anthropic API key, available for free at console.anthropic.com
Customize your AI prompt, filters, and block list
Click Start and let ReplyX reply automatically
PRIVACY & SECURITY
- Your API key is stored locally in your browser only
- No tracking, no analytics, no data collection
- Full user control at all times
- Built-in delays to keep your X account safe
WANT MORE AUTOMATION?
If you like ReplyX, take your X outreach further with AutoReach, the complete AI sales and lead generation agent for Twitter.
AutoReach lets you: → Extract unlimited leads from any X account → Monitor conversations with social listening → Run AI-powered DM conversations → Warm up accounts automatically → Book meetings on autopilot
Turn X into your number one lead generation channel. Visit autoreach.tech
REQUIREMENTS
- Anthropic API key from console.anthropic.com
- X (Twitter) account
- Google Chrome browser
SUPPORT
Questions or feedback? Visit autoreach.tech
Made with ❤️ for the X community FREE • NO ADS • NO LIMITS
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Data month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.