PostPilot
for X
See your post's score before you hit send.
PostPilot lives inside the X composer and scores every post as you type — hook strength, specificity, and 79 engagement-killing patterns, caught while you can still fix them.
No account. No servers. Everything stays on your device.
Not ready to install? Try it free, no signup →
Free forever
The feedback loop X never gave you.
Every tool for X works after the fact — schedulers, analytics, autopsies. PostPilot works in the only moment that matters: while you're still writing.
Real-time scoring
A 0–100 score updates with every keystroke, right under the compose box.
Hook analysis
Detects which of 20 hook types you're using — curiosity gap, data reveal, contrarian — and how strong it lands.
Governor warnings
79 patterns that suppress engagement, flagged with severity before you post them.
Specificity scoring
Vague claims get called out. Numbers and concrete details get rewarded.
AI rewrite
One-click improved version via Claude — your own API key, your own data.
Score history & drafts
Track published-post scores with a 7-day rolling average. Queue drafts with scores attached.
Pro — $5/mo or $50/yr, 2 months free
It learns what works for you.
Generic advice scores generic posts. Pro fingerprints your voice and your audience, then scores against them. Annual billing available at checkout.
Voice fingerprinting PRO
Learns your writing style across 13 dimensions and personalizes every score.
Viral Post Analyzer PRO
Scores any post in your feed — every viral post becomes a lesson you can steal from.
3 rewrite variants PRO
Each variant targets a different hook type. Pick the angle, keep your voice.
Thread scorer PRO
Every tweet in a thread scored individually — the weakest link gets flagged.
Hook Library PRO
Your best-performing openers, saved automatically and remixable when you're stuck.
Learning engine PRO
Analyzes your past performance to find what your audience actually responds to.
The math
A tenth of the price. The one feature none of them have.
| Tool | Price | Scores as you type | Focus |
|---|---|---|---|
| PostPilot | $5/mo ($50/yr) | ✓ in the composer | Post quality, before you send |
| Typefully | $12.50–100/mo | ✗ | Thread writing & scheduling |
| Tweet Hunter | $49/mo | ✗ | Inspiration & scheduling |
| Taplio | $49/mo | ✗ | Analytics & scheduling |
| Buffer / Hootsuite | $15–100/mo | ✗ | Multi-network scheduling |
FAQ
Before you ask.
Can I cancel anytime?
Yes — Pro is a monthly subscription with no contract. Cancel from your LemonSqueezy customer portal whenever you want and you won't be billed again. The free tier (real-time scoring, hook analysis, governor warnings) stays installed and working either way.
What happens if X changes its DOM?
X's compose box has broken PostPilot's scoring twice already since launch — that's the honest tradeoff of living inside the page instead of calling an API. Each break has been caught and fixed same-day, and every fix ships with test coverage so it doesn't regress. There's no guarantee X won't break something again, but there is a track record of fixing it fast.
Privacy
No servers.
Nothing to leak.
- All data lives in chrome.storage.local — scores, drafts, voice fingerprint, everything.
- Exactly two network calls: license validation and optional AI rewrites with your Claude API key.
- Uninstall and it's all gone. There is no PostPilot database to be breached.