Learns from every reply you send

AI that learns
how you talk.

Open Twitter, click reply, get three suggestions that sound exactly like you. Sharper every single day.

Add to Chrome, free See how it works

Free plan, no card. Your voice profile builds in under a minute.

x.com/home
@crypto_guru
The best builders never market themselves...
The best founders never work on their personal brand. They ship, the product talks.
847
312
2.4k
Reply to @crypto_guru...
ekoreva
"best founders...ship..." · reply window open · 94 opportunity score
the product that ships quietly ends up the loudest 94% your voice
building in silence then dropping the receipts hits different 88% your voice
ngl the best brands are just great products with good timing 81% your voice
4 / 100 today Regenerate
How it works

Three steps.
Smarter every time.

Step 01
Build your voice profile
Connect and we fetch your last 500 tweets. Claude analyzes your patterns: how you open replies, your humor, your vocabulary, your capitalization habits.
Step 02
Reply with one click
Open any tweet. The overlay appears with three suggestions, each showing a voice match score. Pick one, edit it, or regenerate. It lands directly in Twitter's compose box.
Step 03
The brain trains itself
Every reply you pick is filed away. After 50 entries it has real behavioral data. After 200 it becomes uncanny. Shadow Voice also learns from replies you type yourself.
Features

Not a chatbot.
Your voice, amplified.

Every feature is designed around one idea: replies that sound like you wrote them on your best day.

Voice match score

Every suggestion shows how closely it matches your voice, computed locally from 12 dimensions. No extra API call.

Suggestion 1
94%
Suggestion 2
88%
Suggestion 3
79%

Reads the full context

Thread above the tweet. Top three comments already posted. What people already said, so you never repeat them. Video frames for Pro users.

The best founders never work on their personal brand...
@alex: "totally agree" already said
@priya: "this is huge" already said
your reply: takes a different angle

Niche-aware timing

Detects your niche (crypto, indie hacker, tech) and surfaces the tweets worth replying to while the engagement window is still open.

crypto / web3 2 reply windows open

DMs are completely private

ekoreva is architecturally blocked from reading Direct Messages. Not policy — code. The overlay never appears on /messages pages. Shadow Voice only watches the public reply compose box.

DMs: hard blocked in code Shadow Voice: reply box only GDPR Article 7 consent

Dynamic reasoning, no hard rules

The brain classifies every tweet dynamically using your memory, not a fixed list of categories. A collab post gets fan-reaction treatment. A question gets a direct answer.

Weekly persona score

Scores how consistent your replies are with your detected brand voice. Shows you exactly which phrases drifted and when.

87
this week
+6 from last week
Pricing

Honest plans.
No dark patterns.

Pay in crypto. No trial traps. Plans only go up — your data and brain entries never reset.

Free
$0/mo
Try the brain. No commitment.
  • 10 replies per day
  • Voice profile from history
  • 3 reply suggestions
  • Basic context reading
Get started
Starter
$9/mo
Daily users building their brain.
  • 25 replies per day
  • Brain memory (50 entry cap)
  • Image context analysis
  • All reply modes
  • Tone slider
Get Starter
Creator
$34/mo
High-volume creators and power users.
  • 250 replies per day
  • Unlimited brain memory
  • Niche pulse feed
  • Reply opportunity score
  • Ghost reply detector
Get Creator
Agency
$59/mo
3 seats. Each with its own brain.
  • 3 team seats
  • 150 replies/seat/day
  • Separate brain per seat
  • Team usage dashboard
  • Revoke keys anytime
Get Agency

All plans paid in USDC on Base, Ethereum, Polygon, Arbitrum, Optimism, or BNB. Plans only go up — your brain data never resets on upgrade.

Start replying
like yourself.

Install in 30 seconds. Your first voice profile builds in under a minute.

Add to Chrome, free View pricing