Quartile, the world's largest retail media optimization platform, is a trusted partner for multichannel e-commerce success. Through patented AI technology and unmatched expertise, we fuel growth for 5,300+ brands and sellers worldwide and manage an annual ad spend exceeding $2 billion. The award-winning platform covers major marketplaces and ad channels for optimal reach. The result is unprecedented granularity, smarter budgeting, and bespoke solutions for retailers. Visit quartile.com to learn how to boost efficiency, outperform competitors, and achieve profitability.
Quartile (quartile.com) has 565 customer reviews on Five Star Index, with an average rating of 4.6 out of 5.
Also known as
quartile.com
Website
quartile.com
Category
IT & Communication
Location
New York, New York
Listed on Five Star Index
2026
About these reviews
Replies
The company replied to 67% of reviews.
Latest
Most recent review: October 2026.
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Reviews are shown as their authors wrote them. The company can reply, but cannot edit them.
Score
This company cannot pay to remove reviews or change its score.
They started in July to connect Quartile to seller central in order to sell my KDP books. They found out in late September that seller central does not accept books for advertising on Quartile. For 3 months they ignored me, lied to me, told me it was just around the corner we would launch, and never did. I was a software engineer once in my life, and I got so frustrated I completed the connection of Quartile to seller central myself. They ignored me and didn't even know what i was doing to make the connection. I wasted thousands and thousands of dollars in lost opportunity while I waited for them to act. Bogus, stay away. I am a lawyer. Bring it.
VL
Vitalii L.
I lost tens of thousands with this…
I lost tens of thousands with this company.
Their system does not work properly, and overbid.
My ACOS jumped from %22 to 39%
DD
Dr. D.
Violating Fiduciary Responsibility
I started working with Quartile 3-months ago and worked with an account manager. In email, we agreed to a budget cap of 3K/month and said "We will work to keep the average ad spend $50 daily for each country" (we agreed on 2 countries, so $100/day, 30 days = 3K) and said she "Yes, we will be monitoring it" (because their system does not allow them to set a budge account because I have a vendor account - which I DONT, KDP authors can set a budget through AMS ads). This should have been a red flag upfront - they don't know enough about Amazon's KDP system which clearly allows for budget setting (Campaign-Campaign Settings-Budget, or their system is that crappy, and the rep is too lazy to actually set a budget rule). The result was my ACOS was in the hundreds for 2 months! I've been running it at 20% for the past 4 years). I tried to give her a chance as she said their system was learning (they like to toss around words like AI and machine learning). Well it didn't learn, and after 2 months of bleeding money, I decided to cancel (on Sep 7th). BUT THEN, I took a look at my account and found it was NOT being monitored!!! within the first 8 days of September they spent $5,548! What happened to monitoring agreed on budget and a fiduciary responsibility. What happened to doing your job? If I hadn't cancelled, I wonder what our meeting would be like? You screwed up and snoozed? Anyways, I'm speaking with the team now and asking to be made whole. I'll get back to you to see Quartile actually does the right thing (why should I have to pay for the incompetence or negligence of the account manager) and returns the unauthorized spend, or I'll have to file claims. Email me/contact me if you want to hear more/get together and file a claim if the company doesn't want to do what is right. I've asked to speak to upper management a few times now, but like the previous review, they don't connect you with people that will actually help. INFACT, the customer success manager emailed me today saying "We would like to offer you a special condition of 50% discount for your next 3 billing cycles so that we can move on and jointly pursue your objectives." LIKE REALLY? Hello upper management, founders, are you listening to this? My objective is not to get scammed!
BP
Beatriz Pares N.
They make false promises!
They make false promises!
By far the worst experience I have had with any advertising company. Super SCAM! They set up your expectations and DO NOT DELIVER. I showed them various examples where they did not do the tasks that were agreed upon and they still wanted to keep me in the contract, even after their account rep said they are no longer working the account. Be very careful! If you want to hear my personal experience please feel free to reach out to me and I can show you exact examples of how they have dropped the ball over and over again. Not only that I have tried to speak to someone that can help me from upper management and they make it impossible for you to speak to someone that can really help.
EY
Emily Y.
Terrible return on ad spend. Do not use!
I am currently trying to end my contract with quartile due to them losing me money consistently for about 6 months. They promised an increase in my ROAS, not only did the ROAS decrease from where I was when I switched to them, but their monthly fee is higher than my previous partner. They are also trying to hold me hostage in the contract, literally while they lose me money every single month. They are honestly running a bait and switch marketing scheme, do not use them!
MB
Matt B.
Quartile and Sidecar related?
I'm not sure how getsidecar.com and quartile.com are connected. I am just passing on I was not happy with the service and emails are coming from Quartile. After 7 months I shut it down as sales were going downhill and went back to Logical Position. NEVER, NEVER, NEVER lock into a contact that repeats or automatically renews. If they do good service and have great results, you wouldn't leave, right? You will find my review under Sidecar. If they were concerned they would review how unhappy I was and cancel the contract for not fulfilling my wishes.
JK
John K.
Stay Away
Quartile provided horrible customer serivce. Their rep was totally incompetent and had no idea what he was doing. When I kept asking for a refund, he wouldn't even attempt to speak to his boss. I asked for a new rep and he wouldn't forward me to a new one. I told him to cancel my account and they have been charging me for the last three months.
Response from QuartileOct 6, 2021
Hi John, thanks for your review. Our records show you've been in regular contact with management, including our Chief Customer Officer. We look forward to resolving your issue within our terms of agreement.
SM
Spencer M.
My experience was awful - Fake reviews
My experience was awful. Communication was minimal and not very organized. When canceling its extremely difficult to get answers on what happens and how you'll be charged. They spent way over my budget and were extremely slow to adapt to what was successful... They will purely spend as much as possible to boost your sales but make you lose money. AVOID at all cost and don't waste your time.
Response from QuartileOct 6, 2021
Hi Spencer, I appreciate the review and your concern. With thousands of happy clients, you can see that our conversion rate is actually quite low, and that we do not need to purchase reviews. As an AI and machine-learning based platform, it does require significant investment upfront in order for the platform to 'learn.' We do have several boomerang clients, so if you want to come back to try new features like automated hourly and margin-based optimizations, please feel free to reach out.