Chrome Extension  ·  Works inside LinkedIn

Cold emails that feel
genuinely warm.

Onyx reads LinkedIn profiles, recent posts, and behavioral signals to write outreach that actually connects. One click, right inside LinkedIn.

S
A
M
R
★★★★★
Loved by 400+ sales teams & founders
linkedin.com/in/sarah-chen-pm
SC
Sarah Chen
VP of Product @ Stripe  ·  Building payments infra
Recent Activity
🧵 "Just shipped our new checkout flow — reduced drop-off by 34%. The biggest lesson? Friction hides in the details you stop noticing."
💬 Commented on "The future of B2B payments" — "Speed alone isn't the differentiator anymore..."
5 credits
Your context
Selling our API monitoring tool to engineering leaders at fintech companies
Generate email
Re: reducing checkout friction
Hi Sarah,

Your post about cutting checkout drop-off by 34% really stuck with me — especially the part about friction hiding in what you stop noticing.

We help teams like yours surface those invisible
Email generated
Analyzed 3 posts · 1 profile
~4s avg. generation
Used by sales teams at
Salesforce
HubSpot
Apollo
Outreach
Loom
Rippling
The process

From profile to inbox
in seconds.

No copy-pasting. No tab switching. Onyx lives right where you're already prospecting.

01

Open any LinkedIn profile

Onyx automatically activates when you visit a LinkedIn profile. No setup needed — the panel opens in the sidebar.

02

Describe your goal

Type a quick prompt — your product, role, or campaign context. Pick a template or start fresh. One sentence is all it takes.

03

Copy your personalized email

In seconds, get an email that references their recent posts, tone, and interests. Copy with one click and send.

What makes it different

AI that reads between
the lines.

Onyx doesn't just read a job title. It analyzes the whole person — their writing style, recent focuses, and how they think.

Behavioral profiling

We scan their last 30 posts to understand their language patterns, hot-button topics, and what drives their decisions.

Deep context

Recency-aware

References their latest activity, not stale data. If they just posted about a big win or challenge, your email will feel timely.

Real-time scraping

Emotional resonance

The AI detects tone and mirrors it back — casual for startup founders, formal for enterprise execs. Every email feels native.

Tone matching

Saved templates

Build a library of your best openers, intros, and CTAs. Apply any template instantly and let Onyx personalize the rest.

Your playbook

Native LinkedIn embed

No switching tabs. No copying profile URLs. Onyx lives inside LinkedIn like it was always meant to be there.

Zero friction

Lightning generation

Average generation time under 5 seconds. From profile to copy in the time it takes to scroll down the page.

~4s avg.
Template library

Your best emails,
scaled to everyone.

Build once, use everywhere. Templates give Onyx the frame — the AI fills in the personalization automatically.

Cold intro · Demo request
Short, direct, one ask
Investor outreach
Founder-to-founder tone
Partnership proposal
Collaboration framing
Re-engagement · Warm lead
Follow up with context
Cold intro · Demo request
Subject
Body
Dynamic fields
{{first_name}}
{{recent_post_topic}}
{{company}}
{{role}}

Dynamic fields are automatically filled using the LinkedIn profile data Onyx scrapes in real time.

From the field

Sales teams love it.

★★★★★

"I used to spend 10 minutes researching each prospect. Now I spend 10 seconds. The emails feel like I wrote them — not like a robot did."

JK
Jake Kim
Account Executive · Rippling
★★★★★

"Our reply rate went from 3% to 11% in two weeks. The context it pulls from recent posts is what makes the difference — people respond because it feels relevant."

MT
Maya Torres
Head of Sales · Series A startup
★★★★★

"I've tried every AI email tool. Onyx is the only one that actually reads the person, not just their job title. The behavioral analysis is genuinely impressive."

DP
David Park
Founder · B2B SaaS
Simple pricing

Start free. Scale as you grow.

No subscriptions. No seat limits. Pay per email, only when you need it.

Free to start
5
free credits on signup  ·  no card needed
  • 5 personalized emails to test
  • Full LinkedIn profile + post analysis
  • 3 saved templates
  • Generation history (last 30 days)
Get started free
100 emails costs $20  ·  Credits never expire  ·  Buy in any quantity

Your next deal starts
with the right email.

5 free credits. No card. Install in 30 seconds and send your first personalized email today.

5 free credits on signup  ·  $0.20/credit after  ·  No subscription