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 1 out of 5 stars

No information about the ethics or ingredients

I can’t find any information about the company
What is in the products?
Are they tested on animals?
Are they made in China?
Why are people buying if they don’t know these things?

23 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Penny, and raise these questions.

We understand that having access to clear information is important when choosing cosmetic products, especially those used around the eye area.

Many of the topics you've mentioned, including information about our company, ingredients, manufacturing, and our animal testing policy, are covered in the FAQ section of our website.

If you have any further questions or would like more detailed information, please email info@diablocosmetics.com, and we would be happy to assist you and provide any clarification you need.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Eyelashes and Menopause

I love this serum. My eye lashes had started falling out, and getting patchy due to the good old menopause. I saw this serum advertised, so I thought I'd give it a try. It works.!! I've been using it for a few months, but they started getting better after only two weeks. I now use it to keep them in good condition.
My eye lashes have grown back, and there are a lot more of them, as they were when I was younger.
I also tried the serum on my eye brows, and they too are a lot fuller. Very pleased with this product.!!

22 November 2025
Unprompted review
Rated 5 out of 5 stars

Amazing lashes

I have used this product twice and as compared to another eyelash serum I tried, it is streets ahead.
After a month, the length of my lashes was noticeably much longer and thicker.

22 November 2025
Unprompted review
Rated 2 out of 5 stars

States is uk based but my order is…

States is uk based but my order is shipped from another country therefore taking too long for delivery. Still not arrived. Very unhappy

22 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Susan. We're sorry to hear that you're disappointed with the delivery time of your order.

We understand your frustration and appreciate that the shipping origin was not what you expected. While we are a UK-based company, we use fulfilment centres in different locations to efficiently serve customers around the world, which means some orders are dispatched from outside the UK.

We're sorry that your order has not yet arrived and for any inconvenience this has caused. We'd like the opportunity to look into your shipment and provide you with an update. Please email info@diablocosmetics.com with your order number or the email address used to place your order, and we'll be happy to investigate as a priority.

Kind regards,
Diablo Cosmetics Support

Rated 1 out of 5 stars

Tracking number: YT2531500701500707

I ordered with this company as they stated that they are an English company however I have been waiting for this product for over 3 weeks and when I look at the tracking on their system the item has been on a plane and through Customs....I feel this is a Chinese company....... buyers beware

19 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Mandy. We're sorry to hear that you're disappointed with the delivery time and understand your frustration.

We'd like to clarify that we are a UK-based company. To serve customers in different regions, we use fulfilment centres in multiple locations, which means some orders are dispatched from outside the UK. We understand that this may not have met your expectations, and we're sorry for any confusion.

We'd like the opportunity to investigate your shipment and provide you with an update. Please email info@diablocosmetics.com with your order number or the email address used to place your order, and we'll be happy to assist you.

Kind regards,
Diablo Cosmetics Support

Rated 3 out of 5 stars

Good communication but product took a…

Good communication but product took a week because it comes from China. I probably wouldn't have ordered if I knew. Only just got serum product but hardly any in the tube. I can't comment on the the efficiency yet.

18 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to leave your feedback Heather.

We're pleased to hear that you were happy with our communication, although we're sorry that the shipping origin and delivery time were not what you expected.

We're also sorry to hear your concern about the amount of serum in the tube. We'd like the opportunity to look into this for you. Please email info@diablocosmetics.com with your order details, so that we may process your replacement order.

Kind regards,
Diablo Cosmetics Support

Rated 1 out of 5 stars

Paid in good faith but never received my order.

I ordered two of Diablo's lash serums a week ago - the money was taken out of my account immediately and since then I've heard nothing from Diablo!
No confirmation email, no dispatch notification and absolutely no sign of the items I ordered. All I can conclude is that this company is a scam merchant. Will be taking the matter up with my bank.

10 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Sonia. We're very sorry to hear about your experience and understand why you're concerned.

We'd like the opportunity to investigate what has happened with your order, including why you may not have received your confirmation or dispatch emails.

Please email info@diablocosmetics.com with the email address used to place your order or any payment details that may help us locate it. We'll review your case as a priority and work towards resolving the issue as quickly as possible.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Love this product (eyelash serum)

Love this product (eyelash serum). 3rd time ordering. Buying experience smooth. Lost most of my eyelashes (and eyebrows) due to chemo. This product has been amazing. My eyelashes are back and my eyebrows are looking much better. Thank you so much Diablo Cosmetics!

15 November 2025
Unprompted review
Rated 5 out of 5 stars

Great product!

What can I say?
It works! And no sore eyes like some well know brands. Excellent price. Easy to buy. Free shipping too!

14 November 2025
Unprompted review
Rated 5 out of 5 stars

customer service was amazing

customer service was amazing! I had a small issue with the bottle I received, they responded to my email immediately, issued me a new eyelash serum and they have also sent me a 30% off voucher on my next order. I cant wait to see the results, if it's anything like their customer service I will be very happy!

12 November 2025
Unprompted review
Rated 1 out of 5 stars

I bought the lash lift kit after…

I bought the lash lift kit after reading the reviews on how easy it is to use.
It absolutely is not easy. It’s fiddly and a very lengthy process.
I gave up after about 10 minutes because I thought it was messing my naturally long but very straight eyelashes.
My advice. Leave it to the experts and do not waste your money. I paid £49 which I would have paid a beautician and would know get good results

12 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the kit, 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

I do love this lash serum

I do love this lash serum. I have tried a few and had quite a few lash lifts, but this seems to work best for me. Lashes are soft and steadily growing and getting stronger. I have a new bottle arriving this week this will be my 3rd.Xx😃👍

11 November 2025
Unprompted review
Rated 5 out of 5 stars

Strong, Healthy Lashes

I must admit I really didn’t think this lash serum would work as well as it does! As I have sensitive eyes I was keen to try a serum that didn’t contain any nasty stuff as this one doesn’t I thought I’d give it a try, good decision, I now have strong, healthy thick lashes! Very happy customer!!

8 November 2025
Unprompted review
Rated 5 out of 5 stars

Works GREAT

I had absolutely no eyelashes due to illness. This worked wonders for me. I know have lashes that are long and beautiful. I have just ordered my second bottle.

18 August 2025
Unprompted review
Rated 5 out of 5 stars

Worth it!

I lift my lashes once a month and have done for a while now. I love the Diablo product; easy to order and instructions are clear. The fiddliest part is gluing the pad to the lid and the lashes to the pad. (My top tip is to trim the lash pad to fit your lid as they are quite long) But once that is done, the product is quick and easy to apply. The result is worth it! I'd definitely recommend.

6 November 2025
Unprompted review
Rated 5 out of 5 stars

Give it a go, it is not all hype

I have seen the adverts for Diablo eyelash serum and thought it was all just hype. I have been using serums for years and had run out of my usual one and the price of Diablo's serum was the best one at time so I thought why not give it a go. I used to have very long eyelashes back in the day but no serums got me close - until now!!! After about 4 weeks, there they were long eyelashes from my youth :) Another 4 weeks and the thickness is back. So, for me, it is a no brainer to continue with this serum :)

4 November 2025
Unprompted review

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