Makeup That Lifts You Up & Won't Let You Down – We believe you deserve makeup that is as good for you as it makes you look. Our formulas balance active botanicals with strategic, clean synthetics for perfect wearability with every application. You neve...
Kosas Cosmetics (kosas.com) has 26 customer reviews on Five Star Index, with an average rating of 1.7 out of 5.
Also known as
kosas.com
Website
kosas.com
Category
Cosmetics & Makeup
Location
Encino, California
Listed on Five Star Index
2026
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Most recent review: August 2026.
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Hands down the worst custom service I've ever dealt with. Their policy right on there website says I can request cancellation within first hour after purchase. I received confirmation emial 40 minutes later, that they would be getting to me shortly
I finally got in touch when they opened, and because waiting for them to open exceeded an hour, they said there is nothing they can do. I will never shop here again
AL
Alice
Negligent company selling dangerous products
Like many others, my face and neck broke out in a severe, itchy rash from using the 'Revealer Skin-Improving Foundation SPF 25'. If you go to the Kosas website and read the 1 star reviews you'll see at least 176 other customers had the same issue as me. I spent 4 months with this problem coming and going, not knowing it was the foundation. I had repeat DR appointments, blood tests, with no clear reason to why it was happening.
Kosas claim "We take this very seriously as performed safety testing with a 3rd party lab" but provide no evidence of the claims and no supporting information on when the tests are run. They have since ghosted me despite telling me they had escalated my case with senior management LOL.
The foundation only started giving me this reaction 1 year into use (it was still in date for another 6 months). They clearly are not testing it during the products lifespan.
Negligent company selling dangerous products. They refuse to confront the fact their products are causing genuine harm.
CD
Charlene D.
Thumbs down.
Unfortunately the lowest rating I could give it was 1 star. I purchased the brow/lash serum after reading about the great ingredients. I started using it on my lashes as directed, every night for 10 days. After 10 days I noticed my eyelashes were getting shorter than they were before using this product! I sent several emails, calling was useless, relating this and still have not received a reply. Instead, Kosas sends me emails touting different products.
EL
Ellie
The mascara is absolutely dreadful
The mascara is absolutely dreadful. It is labelled ‘Long wear’ but is really not even functioning as ordinary mascara. It smeared all down my face within an hour- it shouldn’t be being sold. I really think it ought to be recalled. The company had no interest whatsoever in helping me with my issue- which I truly believe is a valid one. I will never use them or Naturisimo again and I would just warn others about this as they are charging fairly high prices.
CH
Christina
Be careful before you order
horrible experience with customer support. They won’t reply to my emails. Only when I commented under an instagram post to please get back to me they reached out via DM to ask for my email. I gave it and guess what. Nothing. Still they won’t reply and help me. Be careful when you order because if you encounter an issue they won’t get back to you to reply.
MB
Mel B.
Bought me out in hives
KOSAS BB BURST TINTED GEL CREAM 30ML.
The day after I used this, my face became itchy and small bumps began appearing on the side of my face, both left and right. This was Friday 12 April. Saturday 13 April, woke up even worse. Hot to touch, taking antihistamine tablets. Today Monday 15th April, still the same, and now looking to seek a doctors appointment as I feel I need something stronger. Would not recommend this Kosas product.
Having now done my research, I see that other people have had a similar experience.
CU
customer
Order didn’t ship, no response from customer service
I’m not sure what happened to them but I ordered previously and liked the products, so several months later, purchased again. Their website says they ship in 2-3 business days and the products arrive in 5-7 business days. Unlike the first time, they didn’t ship on time, and never responded to any of my inquiries. I tried email, voicemail, even messaged them on Instagram. No response. After the 7th business day and still no response, I got worried and contacted my credit card company. It would have been fine if they had just responded and said sorry for the delay, your order will ship soon, but they didn’t respond at all. I had placed several orders the same day to other online stores, and Kosas (based locally, just 2 hours from me), was the only company that didn’t ship anything out. Even items that I had ordered from China arrived by that time, so I don’t understand why Kosas couldn’t ship out, or at the very least, respond to my inquiries.
BG
Brydie G.
Contact dermatitis
I had an allergic reaction to the foundation. Horrible prickly, itchy sensation all over my face. I’ve never experienced it before and the chemist said it was contact dermatitis. Don’t know what ingredients Kosas uses but stay clear!!!