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We're backed by Y Combinator (S23)

Connect with any prospect like you actually know them.

We drive faster revenue growth for enterprises using AI-powered marketing automations.

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Proudly backed by

Y Combinator
Soma Capital
Liquid 2
Pioneer Fund
Amino Capital

Most businesses' email deliverability rates are awful.

There are 40+ common pitfalls that land your emails in the spam folder. We use every trick in the book to evade them.
Cold startUnsigned messagesSimultaneous blastsBouncing messagesTemplated emailsDomain exhaustion'Spiky' email volumeNear-identical emailsBlind blastingDegrading healthExcessive linksFlagged keywords

Target companies with hyper-precision.

Fiber AI pulls in data from 50+ providers, including BuiltWith, Crunchbase, LinkedIn, Gartner, and more. Reach all the companies you care about, and none of the ones you don't.

Find all companies that...

  • Get ≥20K visitors/month
  • Have 50100 employees
  • Are between Series AC
  • Use Shopify
  • Are based in United States
  • Last raised after January 2020

Identify the ideal prospect at any company.

Once you've found companies you want to target, just tell us who you're looking for, and watch Fiber AI filter to get the highest-priority prospects.

Find all employees who...

  • Have title "Product Manager"
  • Joined in last 6 months
  • Have ≥1000 LinkedIn connections
  • Previously worked at Google

Find verified contact info for your prospects.

Fiber AI rigorously vets every piece of information we find, including four layers of bounce detection for email addresses.






Isabel Smith


(212) 555-1234

123 Broadway,

New York, NY 10010

Gary Wright


(415) 555-6789

1 Market St,

San Francisco, CA 94101

Jasmine Shah


(312) 555-5050

100 S State St,

Chicago, IL 60606

Find the "golden nugget" to make your outreach truly personal.

Fiber AI uses all the information at its disposal to craft an ultra-personalized hook that's near-guaranteed to get an open — and a response.

Wrote blog post on road trips

Went to Harvard

Worked at Google MTV

Tweets about chess


Robert Zhen
Subject: Highway 395 >>> the PCH

Generated with GPT-4, reviewed by you.

Outreach messages are drafted at scale with the latest-gen LLMs. Human approval is as easy as swiping right.


Ye-jun Park · Head of Product, Klarna
Subject: It's all becoming clear now
Hi Ye-jun,


Divya Zaveri · Eng Director, PayPal
Subject: Pay attention to this & we'll be pals
Hey Divya,


Wolfgang Fischer · CISO, Credit Karma
Subject: To your credit...
Hey Wolfgang,


Anna Fernandez · CPO, Stripe
Subject: Earn your stripes
Hi there Anna,


Takumi Suzuki · Product Director, Chime
Subject: Does this ring a bell?
Hi Takumi,


Sarah Liu · VP of Product, Square
Subject: Don't be a square
Hi Sarah,


Lawrence Williams · CTO, Ramp
Subject: "Ramp" up your growth with Fiber
Hey Lawrence,

Our personalized outreach has closed...

Mark Cuban

Owner, Dallas Mavericks

Nir Eyal

Bestselling Author, Hooked

Mike Novogratz

CEO, Galaxy Investment Partners

Arianna Simpson

General Partner, Andreessen Horowitz

Jason Calacanis

Co-Host, All-In Podcast

...and CEOs / VPs at:

Josh Haftel
Jeremy Allaire
Arianna Simpson
Devin Finzer
Mark Cuban
Scott Belsky
Anand Mariappan
Jason Calacanis
Nir Eyal
Mike Novogratz
Nikhyl Singhal
Vijay Jayaraman

Your road to hypergrowth begins here.

When you book a demo, we're not just going to give you yet another product tour. Instead, we'll spend half the time learning about your growth strategy and the other half brainstorming how Fiber AI can kick it up a notch... or three.

Get in touchBook a demo



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