Diablo Cosmetics Reviews 

1,667
•
TrustScore 4.5 out of 5

4.3

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Review summary

Created with AI, based on recent reviews

Looking at 216 reviews, reviewers overwhelmingly had a great experience with this company. Customers frequently praise the fantastic eyelash serum, noting that the formula is very gentle on sensitive eyes while consistently delivering noticeable length, growth, and thickness. Consumers also note the smooth application process and the exceptionally helpful support team that promptly resolves any unexpected issues. Some reviewers were not happy with delivery delays, mentioning that orders occasionally took too long to arrive, lacked confirmation emails, or tracking information was entirely missing. A few people also felt that certain product tubes felt unusually empty or ran out much faster than expected.

What people talk about most

Quality

Reviewers highlight positive aspects of quality, expressing immense satisfaction with how the gentle serum... See more

Order

People report ambiguous experiences with order, noting that while many consumers enjoy speedy shipping and... See more

Customer service

Users describe positive interactions with customer service, frequently highlighting prompt replacements and... See more

Reviews shaping this summary

Rated 4 out of 5 stars

I've tried several eyelash growth serums over the years. Not one of them made any difference and some of them really stung. However, this is the second Diablo serum I've ordered. It seems to help. My... See more

Company replied

Rated 5 out of 5 stars

A most responsive company. Great product. Order acknowledged immediately. Delivery prompt. Customer service 5 star. I have just ordered my third eye lash serum. Used regularly it is super. My las... See more

Rated 5 out of 5 stars

Ok where to begin. Having reached an age where I noticed my once good lashes have become short and sparse. Having tried that one extortionately priced serum, it wasn't one that I could afford either.... See more

Rated 5 out of 5 stars

There's a pretty intense learning curve to do this right but once you figure it out, the stuff really works!! I use it to laminate my brows as well as perm my lashes. The adhesive causes an allergic r... See more


Company details

  1. Cosmetics Store

Written by the company

Diablo Cosmetics is your destination for simple at-home beauty products.


Contact info

4.3

Excellent

TrustScore 4.5 out of 5

2K reviews

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No recent history of asking for reviews

This company hasn't invited customers recently, so reviews may not be representative

Replied to 100% of negative reviews

Typically takes over 1 month to reply

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4.3

All reviews

(1,667)

216 reviews in the last 12 months

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Rated 5 out of 5 stars

Lash experience

I’ve always used uk lash but after a few years it stopped working I saw this on offer and thought I would try it so glad I did it’s certainly improved my lash growth and thickness

March 26, 2026
Unprompted review
Rated 5 out of 5 stars

Aging eyes!

Decided at 80+ I would ignore my falling lashes, but vanity overcame me so trying to get them at least partly back,getting there, had to give up mascara too that doesn't help!

March 24, 2026
Unprompted review
Rated 1 out of 5 stars

No difference in my lashes whatsoever…

No difference in my lashes whatsoever and been using it for months. Save your money for something that works! So disappointing

March 23, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback June. We're very sorry to hear that our Eyelash Serum did not deliver the results you were hoping for, despite using it consistently for months.

We understand how disappointing this must be. While many of our customers experience visible improvements, individual results can vary depending on factors such as natural lash growth cycles, genetics, age, and other individual characteristics.

We'd appreciate the opportunity to learn more about your experience and see if there's anything we can do to help. Please email info@diablocosmetics.com with your order details so that we may review your case further.

Kind regards,
Diablo Cosmetics Support

Rated 1 out of 5 stars

No funciona el kit lifting.

No funciona el kit lifting. Me quedaron rectas las pestañas.

March 21, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the kit, Tati, and we’re sorry it hasn’t worked out so far. We’d really like to understand what went wrong and help you get a better result. If you email info@diablocosmetics.com with your order number, we’ll take a look and sort out a solution for you.

Rated 1 out of 5 stars

buyer beware

ordered the lash serum, they took the money, waiting over two weeks now, I have a confirmation number but its not in their system and so that says no order. I will never recommend this company or product.

March 20, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Monica. We're very sorry to hear about your experience and understand how frustrating this situation must be.

Please email info@diablocosmetics.com with your order confirmation email, and the email address used to place your order. We'll look into this as a priority and do everything we can to resolve the issue as quickly as possible.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Fantastic product

Fantastic product. My eyelashes seemed to be disappearing and were no longer as full or as long as they used to be. I am happy to say the Diablo eyelash serum has massively improved them. The length is better then they have ever been, and they are much more fuller. I've had comments asking if I had false lashes on and it was great saying nope there all mine. Speedy delivery and have already purchased my next bundle.

March 19, 2026
Unprompted review
Rated 5 out of 5 stars

Swift solution

I contacted Diablo with a query regarding their eyelash serum. Within a day they had actioned a replacement which is on its way to me now. They also sent me a 30% off code for my next purchase! As long as all good with the new bottle of serum, I will be a returning customer. I didn’t expect this level of customer service to be honest!

March 18, 2026
Unprompted review
Rated 5 out of 5 stars

I am always skeptical of products…

I am always skeptical of products saying they are going to work. I saw this on an ad and saw the results others were getting. Since they had a money back guarantee, I thought I'd try it and boy, Im sooooo happy I did! With consistency on applying it, my lashes grew longer and I'm so amazed. I just ordered my second bottle since it actually works!!! I did a before/ after picture to compare and the results are absolutely amazing. Will continue to use and recommend.

March 19, 2026
Unprompted review
Rated 1 out of 5 stars

i ordered 2 eyelash serums by mistake

i ordered 2 eyelash serums by mistake, I only want one but can’t reach anyone in order to cancel extra one 🤷🏼‍♂️

March 15, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to leave a review Kathleen. We're sorry to hear that you had difficulty reaching us to amend your order.

We'd be happy to look into your order and see what options are available. Please email info@diablocosmetics.com with your order number or the email address used to place the order, and we'll review your request as quickly as possible.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Great Customer Service

I informed the company that the lash serum that I had ordered appeared to be empty .
I was very pleasantly surprised to receive a response the following day apologising for the problem and informing me that they would be sending a replacement .
If only all companies would treat their customers the same way .
I will certainly be ordering from Diablo again

March 13, 2026
Unprompted review
Rated 5 out of 5 stars

Recommended 10/10!!!

I’m extremely happy with the results! It really helped my lashes grow longer and stronger. I honestly didn’t expect it to work this well. The communication and service from Diablo were absolutely great, super fast and professional. Highly recommended 10/10!

March 3, 2026
Unprompted review
Rated 5 out of 5 stars

Definitely works!

I was previously using a serum that had prostaglandins in it and it was discoloring my eyelid so I tried this serum and was pleasantly surprised. It worked just as well as the other if not better! My lashes are.definitely thicker and longer using this and I will continue to purchase!

January 16, 2026
Unprompted review
Rated 1 out of 5 stars

Awful Lash serum

I stopped using UK Lash as I watched reviews for Diablo on different social media platforms and thought changing serum would be good for my lashes. WORST MISTAKE EVER! My lashes hsd grown long and lush with UK Lash, both top and bottom, Diablo totally ruined them. I bought 2 Diablo serums and used both, giving the serum time to work but unfortunately the results were awful. I'm now back to using UK Lash and am starting to see some small growth again. I would definitely not recommend Diablo.

February 28, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Jacqueline, and we’re sorry it hasn’t worked out so far. We’d really like to understand what went wrong and help you get a better result. If you email info@diablocosmetics.com with your order number, we’ll take a look and sort out a solution for you.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Lash serum

After using this lash serum my lashes have definitely grown longer and stronger ,just ordered my 2nd tube .doesn't irritate my eyes like others that ive used, highly reccomend .

February 28, 2026
Unprompted review

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