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Justin Mares

Goodreads Author

Born

The United States

Website

http://justinmares.com

Twitter

jwmares

Genre

Business

Member Since

May 2014

URL

https://www.goodreads.com/justinmares

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Justin is the co-author of Traction Book: a Startup Guide to Getting Customers. Before writing the book, he ran growth at developer tools company Exceptional Cloud Services, which was acquired by Rackspace in 2013.

Previously, he also co-founded a 3D printing company that was acquired in late 2011, and has consulted for startups and some of the most popular websites on the internet. He's also an active mentor at 500 Startups, a seed-stage investment fund and accelerator.

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Justin Mares’s books

Average rating: 4.1 · 9,494 ratings · 542 reviews · 9 distinct works

	Traction: A Startup Guide to Getting Customers by Gabriel Weinberg (Goodreads Author), Justin Mares (Goodreads Author) 4.11 avg rating — 9,896 ratings — published 2014 — 25 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Traction: How Any Startup Can Achieve Explosive Customer Growth by Gabriel Weinberg (Goodreads Author), Justin Mares (Goodreads Author) 3.83 avg rating — 186 ratings — 2 editions	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Become a Technical Marketer: A Guide to Working Faster, Accelerating Growth, Automating Marketing Tasks, and More 3.72 avg rating — 39 ratings — published 2015	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Traction really liked it 4.00 avg rating — 17 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Tração. Domine os 19 Canais que Uma Startup Usa Para Atingir Aumento Exponencial de Sua Base de Clientes by Gabriel Weinberg (Goodreads Author), Justin Mares (Goodreads Author) liked it 3.00 avg rating — 6 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Learn SQL for Marketers: Run Cohort Analyses, Get Deeper User Insights, Analyze Any Marketing Metric, and More (Become a Technical Marketer Book 2) 4.33 avg rating — 3 ratings — published 2015	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Tração: Domine os 19 Canais que uma Startup usa Para Atingir Aumento Exponencial em sua Base de Cliente by Gabriel Weinberg (Goodreads Author), Justin Mares (Goodreads Author) liked it 3.00 avg rating — 3 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Marketing Strategy: How Today's Top Companies Get Traction it was amazing 5.00 avg rating — 1 rating — published 2014	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
	Traction: Le strategie vincenti per ottenere una crescita esplosiva di clienti (Le Imprese Vol. 2) (Italian Edition) by G. Weinberg, Justin Mares (Goodreads Author) 0.00 avg rating — 0 ratings	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars

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Justin Mares's Blog

Our Insane Approach to Regulating Toxins

This month, we’re back with another deep dive into the world of health, toxins, toxin regulation, and our wonderfully dysfunctional regulatory system. Let’s talk about exactly how we determine “safe” toxin exposure levels (ie the EPA’s 297 parts-per-billion (ppb) exposure limit for Atrazine).

Let’s start with a mind-bending fact: there are 40,000+ chemicals allowed in our food, our water, our hous

Justin is Currently Reading

Justin Mares is currently reading

The Secret of Life: Cosmic Rays and Radiations of Living Beings

by Georges Lakhovsky

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Jan 08, 2026 07:24PM

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For God, Country, and Coca-Cola

by Mark Pendergrast (Goodreads Author)

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Jan 08, 2026 05:56AM

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Hair Like a Fox: A Bioenergetic View of Pattern Hair Loss

by Danny Roddy

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Jan 03, 2026 07:53PM

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Justin Mares rated a book it was amazing The Fifth Science by Exurb1a	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
Feb 11, 2026 05:04PM · like · preview book See a Problem? We’d love your help. Let us know what’s wrong with this preview of The Fifth Science by Exurb1a. Problem: Details (if other): Thanks for telling us about the problem. Not the book you’re looking for? Preview — The Fifth Science by Exurb1a <iframe sandbox id="wrongBookKindlePreviewScreen">
Justin Mares is currently reading The Secret of Life: Cosmic Rays and Radiations of Living Beings by Georges Lakhovsky	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading For God, Country, and Coca-Cola by Mark Pendergrast (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading Hair Like a Fox: A Bioenergetic View of Pattern Hair Loss by Danny Roddy	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading The Strength of the Few (Hierarchy, #2) by James Islington (Goodreads Author) Goodreads Choice Awards Nominee in Readers' Favorite Fantasy	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading Money Games: The Inside Story of How American Dealmakers Saved Korea's Most Iconic Bank by Weijian Shan	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading The Caesars Palace Coup: How a Billionaire Brawl Over the Famous Casino Exposed the Corruption of the Private Equity Industry by Max Frumes	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading The Human Scale: A Novel by Lawrence Wright (Goodreads Author)	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares finished reading The Practice of the Wild: Essays by Gary Snyder	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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Justin Mares is currently reading Genghis Khan and the Making of the Modern World by Jack Weatherford	Error rating book. Refresh and try again. Rate this book Clear rating 1 of 5 stars 2 of 5 stars 3 of 5 stars 4 of 5 stars 5 of 5 stars
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