Synapt · Chrome extension for the feed
Replies that
sound like you.
Spot posts heating up on X by how fast they're getting views right now. Draft a reply in your voice before the thread cools off.
7 days free · Cancel anytime · From $19/month
See how it worksLive in your X, LinkedIn, and Product Hunt feeds
The problem
The feed wastes your time
You open X to engage. An hour later you've scrolled past the posts that still had oxygen.
Cold posts eat the scroll
Most of what you see already peaked. Reply anyway and you're talking into an empty room.
Good replies arrive late
By the time you craft something worth posting, the thread has moved on without you.
AI drafts sound like AI
Generic assistants erase your voice. Editing them takes as long as writing from scratch.
How it works
From install to first reply
Minutes, not a migration. No content calendar to rebuild. Just the feed you already live in.
Install the Chrome extension
Add Synapt from the Chrome Web Store. Sign in, paste your API key once. It lives under the posts you already read.
Spot what's still heating up
On X, see view velocity on posts in real time. Filter toward Fired Posts when you want signal, not another cold scroll.
Add a short Knowledge Base
Who you are, what you build, how you sound. Optional, but it keeps drafts from reading like generic AI.
Draft, edit, ship
Generate under the post, tighten the line, post while the thread is still moving. You stay in control of every send.
On X
Reply while the thread still has oxygen
Likes pile up after the peak. Velocity tells you what's still moving, so you stop burning an hour under posts that already cooled off.
Cold post
Views stalled
Engagement already happened. A clever reply still lands in a quiet room.
Heating post
Views climbing
People are still arriving. Same reply quality, much better odds of being seen.
View velocity, plain English
How fast a post is getting views right now, not lifetime vanity counts. Synapt surfaces that signal on posts in your X feed so you can triage without a spreadsheet.
Fired Posts filter
When you want signal over scroll, filter toward higher-velocity posts. Spend the session on threads that still have oxygen.
X-first by design
Velocity triage is built for X. On LinkedIn and Product Hunt you still get reply drafts, just without the VPM layer.
Your voice
AI drafts that still sound like a person
Generic assistants erase the reason people follow you. Synapt starts from your tone and Knowledge Base. Then you tighten the line before it goes live.
Tone + Knowledge Base
Who you are, what you build, how you sound. A short setup once. Drafts stop reading like a press release.
Draft under the post
Generate in Chrome where you already scroll. Context stays with the thread. No copy-paste into another tab.
You edit the final line
Add the lived detail only you know. Nothing posts without you. That edit pass is the product, not a footnote.
Platforms
One extension.
Three feeds.
View velocity on X. Reply drafts wherever you already engage.
X
VPM triage, Fired Posts filter, and reply drafts in your voice.
Reply and post drafts that match your tone and Knowledge Base.
Product Hunt
Comment and reply drafts while launches are still moving.
Product
Built for the reply,
not the calendar
Synapt sits in the feed. It surfaces heating posts on X and helps you draft replies that sound like you, not like a template.
Fired Posts on X
Filter your timeline toward higher-velocity posts so you stop spending half an hour on content that's already cooled off.
View velocity, live
See how fast a post is getting views while you scroll, so you know what's still worth engaging.
Replies in your voice
Draft under the post using your tone and Knowledge Base. You edit the final line. Nothing posts without you.
Knowledge Base that sticks
Who you are, what you ship, how you sound, stored once so drafts stay closer to you than a generic AI chat.
X, LinkedIn, Product Hunt
Velocity filtering on X. Reply drafts wherever you engage. One Chrome extension, no separate dashboards.
Tone performance over time
See which tones you actually use and how they perform, so you improve the loop instead of guessing.
Who it's for
Built for people who grow in public
Proof
From someone already in the feed
One real note from a builder using Fired Posts, not a wall of fake logos.
Valentyn Kit
@valikit14 ·
“The fire posts feature is veryyy useful, for me it was a gamechanger. Yesterday I made00 replies and most of them were viral which gave me00 + followers from one day.”
Honest take
Different jobs. Be honest about which one you need.
Schedulersand Synapt aren't drop-in replacements. Pick the tool that matches the work you actually do.
Publishing calendars & queues
Schedulers
- Plan and queue posts across platforms
- Team approvals and content calendars
- Reporting on what you published
- Built for outbound content ops
Often $15–$99+/month depending on seats and suite
Real-time engagement in the feed
Synapt
- View velocity on X posts while you scroll
- Fired Posts filter for higher-velocity threads
- AI reply drafts in your voice (you edit before send)
- Chrome extension on X, LinkedIn, and Product Hunt
From $19/month · trial credits to start
Choose Schedulers when…
- You need a calendar, queue, or multi-seat publishing workflow
- Your main job is outbound posts on a schedule
- You already have a social team running campaigns
Choose Synapt when…
- You grow by engaging in the feed, not only posting
- You want view velocity on X while you scroll
- You need reply drafts in your voice, under the post
Many people keep a scheduler for outbound posts and use Synapt for the reply loop. Different jobs; both can coexist.
Chrome extension
Install once. Open the feed. Draft under the post.
Add Synapt from the Chrome Web Store, sign in, paste your API key in settings, then generate replies where you already work.
Pricing
Simple pricing. Real trial credits.
Start a 7-day free trial. Cancel anytime before you're charged.
Basic
Try the feed loop without a big commitment
Growth
Steady reply volume for regular engagement
Pro
Higher limits when replies are part of your routine
Not sure which plan is right for you? Start with the Basic plan and upgrade anytime.
FAQ
Questions, answered straight
How Synapt works on X, LinkedIn, and Product Hunt. No marketing fog.
Still stuck? Ask on X.
Message Audiencon →Start today
Spend less time scrolling. Ship replies that sound like you.
Start a 7-day free trial. Spot heating posts on X, draft replies in your voice, edit before you post. Plans from $19/month.
Cancel anytime · Chrome extension