Building in public? Let your replies do the growing.
Every day XJumper reads the Build in Public community on X, picks posts from builders worth talking to, and replies in your voice from your own browser. Up to 50 replies a day, never the same post twice.
How the agent grows your account
Two minutes to set up. After that it runs every day on its own, and every reply it sends shows up in your Console.
Join Build in Public
Join the Build in Public community on X and install the desktop Agent. It works inside the X account you already use.
It picks the posts
Each day it reads fresh community posts and keeps the ones worth answering: recent posts from real builders, nobody you already know, and never the same author twice in a month.
It replies in your voice
Every reply is written for that one post, then sent from your own browser at a human pace, spread across your day.
Some replies become follows
After replying, it follows a share of the authors (you choose how many), so a good conversation has somewhere to go next.
Who Uses XJumper
Creators, founders, freelancers, and teams use XJumper to grow on X with automation that stays safe and on-brand.
Get users from X without living on X.
- Stay consistent with a simple weekly content rhythm
- Get seen in the right threads (not random timelines)
- Turn attention into trials, calls, or waitlists
- Smart Post: turn notes into on-brand posts + schedule
- Smart Reply: engage early on high-signal conversations
- Smart DM: welcome new followers and follow up safely
- Smart Analytics: see what actually drives growth
Repurpose once. Post for weeks.
- Creators who publish on YouTube/podcasts/newsletters
- Teams who need a repeatable content pipeline
- YouTube → X posts: generate hooks, summaries, and threads
- Improve Tweet: rewrite drafts into your own voice (not copy-paste)
- Schedule in batches (and schedule into X Communities)
- Smart Reply: keep engagement consistent without burning out
Announcements that travel. Communities that stick.
- Clear, consistent updates across time zones
- More replies and community participation on key posts
- Better onboarding when new people arrive
- Smart Post: roadmap → thread, recap → post, schedule ahead
- Community scheduling: plan drops directly inside X Communities
- Smart Reply: engage early under important announcements
- Smart DM: welcome/onboard new followers safely
Turn visibility into leads, without spam.
- Stay top-of-feed with a lightweight posting routine
- Earn trust through helpful replies (not cold pitching)
- Convert warm engagement into calls and projects
- Smart Follow: targeted discovery for small accounts
- Smart Reply: consistent, high-quality engagement
- Smart Post: case studies and tips you can schedule in batches
- Smart DM: welcome + follow-ups with opt-out and pacing
What Our Users Say
Join hundreds of creators, founders, and brands growing their audience on autopilot.
“Been testing XJumper for a week now — really saves me time on finding the right accounts to engage with.”
“I like how the auto-reply feels natural, not spammy. Makes growing my profile feel less like a chore.”
“The Smart Follow feature is on point. I’m getting way better follow-backs compared to doing it manually.”
“I was skeptical at first, but the AI Composer actually gave me post ideas that worked really well for my brand updates.”
“Scheduling threads is smoother than I expected. Nice to not worry about timing every single post.”
“CRM logging is underrated. I didn’t realize how useful it is to keep track of engaged users.”
“Overall feels like having a little growth assistant running in the background. Solid tool so far.”
One developer growth agent. Three focused tools.
An autonomous agent handles daily Build in Public replies. Three focused tools handle research, monitoring, and warm outreach when you want more control.
Daily replies to builders from your own browser
XJumper reads the Build in Public community, filters for real builders, drafts on-voice replies, and posts them from your desktop Agent at a human pace. Up to 50 replies a day, with one reply per post and author cooldowns to keep it natural.
Find the posts worth replying to fast
Stop scrolling for hours. Search across posts by keyword, engagement, and recency to surface conversations where a specific reply can get you seen. Feed the winners to your agent, or write the reply yourself.
Watch up to 10 accounts that matter, in real time
Track competitors, builders you admire, and high-value prospects. Get notified the moment they post or go viral, so you or your agent can be early to every conversation that compounds.
Turn new followers into conversations with warm DMs
Once the agent grows your builder audience, Smart DM helps you convert it. It drafts personalized messages to people who already follow or engage with you, then sends them at a human pace from your own browser session.
Supercharge X.com
Our powerful Chrome Extension integrates directly into X.com, giving you AI tools and insights right where you need them.
One-Click Authorization
- Sync your X account to XJumper with a single click
- No passwords stored - secure cookie sync only
- Access all x-jumper.com features seamlessly
- Auto Reply, Auto Follow, and analytics work instantly after sync
- No re-login when switching devices or browsers
Vibe Writing & Optimize
- Voice-to-text: turn your voice into tweets directly on X.com
- Translate to 15+ output languages before posting
- Rewrite draft text into polished, professional content in your chosen language
- Commuters and multitaskers who think faster by talking
- Reaching global audiences, repurposing content across languages
- Tightening last-minute drafts before posting
AI Reply
- AI Reply button appears when composing a reply on X
- Get context-aware suggestions based on the original tweet
- No copy-paste from another tab - everything in-context
- Hit trending threads early without sounding generic
Follow Status & Quick-Follow
- Avatars show colored borders: green = following, yellow = pending, red = not following, gray = unknown
- Spot who you've already followed in lists and threads at a glance
- Follow or unfollow with one click from tweets and user lists - no need to open profiles
- Scale follow/unfollow when building an audience, prune inactive accounts efficiently
Activity Overview
- Clear chart on your profile page showing posts and replies over time
- Spot your best posting windows
- See reply volume and gaps in content cadence
Tweet Value
- Estimated ad value (USD) next to views on every tweet
- Based on impressions and engagement (likes, replies, retweets)
- Price sponsored posts and negotiate deals
- Know which content performs best
Frequently Asked Questions
Everything you need to know about XJumper's Build in Public reply agent.
Ready to Grow on X/Twitter?
Get StartedLaunch your Build in Public reply agent
Let XJumper find builder posts, draft useful replies, and publish them from your own browser while you keep shipping.