Diablo Cosmetics Reviews 

1,667
•
TrustScore 4.5 out of 5

4.3

While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more

To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more

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

5-star
4-star
3-star
2-star
1-star

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

How this company uses Trustpilot

See how their reviews and ratings are sourced, scored, and moderated.

4.3

All reviews

(1,667)

216 reviews in the last 12 months

Write a review
Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 5 out of 5 stars

Didn't irritate my eyes

Posted quickly. Repeat order. Didn't irritate my eyes though saw little improvement in my lashes. However, my brows improved and a small area that was very sparce appears fuller which I am very happy about. I can help thin lashes with mascara but don't like coloured in brows, preferring a natural look so am very happy with the results

February 25, 2026
Unprompted review
Rated 5 out of 5 stars

I've never had lashes so good.!!

I have never had long eyelashes but recently they had really started to think.
I did some research and decided to try Diablo.
It was really easy to use and didn't feel sticky or sting at all.
After two weeks I began to notice a big improvement and now I'm two months using it and my lashes are the best they've ever been..Thank you Diablo 🙂

February 1, 2026
Unprompted review
Rated 2 out of 5 stars

Chinese product, no effect on my lashes

Even though Diablo claims to be a British company, the products are shipped directly from China. I don't fully trust in the INCI list of unregulated Chinese cosmetic products, the content can be anything. However, I gave the eyelash serum a try, but didn't notice any effect whatsoever on my lashes in 1 month.

Would not buy again, not worth the money.

The only positive thing is that it doesn't sting the eye as some other brands (eg. Xlash) do.

February 24, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Henna, and we’re sorry it hasn’t worked out so far.

We appreciate that the shipping origin came as a surprise. While we are a UK-based company, we operate fulfilment centres in different locations to serve customers around the world as efficiently as possible. We understand that this may not have met your expectations, and we're sorry for any disappointment this caused.

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

Longer lashes

Been using the eye lash serum for about 3 months. The difference is unbelievable. Would definitely recommend.

February 22, 2026
Unprompted review
Rated 5 out of 5 stars

Two pack Eyelash…

I ordered a 2 pack of the Eyelash Growth Serum, after having poor results with UK Lash. Unfortunately both tubes appeared to have very little liquid in, so I got in touch with the customer service, thinking that perhaps their was something wrong with the batch number.
Almost by return of email the same day, I was notified that a replacement would be sent out straight awat, which it was, and am now just waiting for the postman!
This is the best customer service I have ever expierenced, absolutely brilliant.

February 21, 2026
Unprompted review
Rated 2 out of 5 stars

Probably dropshipping

I got mine today after quite a long time and the package looks cheap and just like some cheap China product. This is most likely a dropshipping product and im hesitant to actually use it. Dont know whats actually in there. It sounded too good to be true and probably was

February 20, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Kathleen. We're very sorry to hear about your experience and understand your frustration regarding the delivery time and communication.

We appreciate that the shipping origin came as a surprise. While we are a UK-based company, we operate fulfilment centres in different locations to serve customers around the world as efficiently as possible. We understand that this may not have met your expectations, and we're sorry for any disappointment this caused.

We'd really like the opportunity to put this right, Please email info@diablocosmetics.com with your order number and we’ll look into it straight away, whether that means getting it to you or refunding you.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Excellent product.

Excellent product and service,so purchased a second time. As previously experienced excellent service once again.
A pleasure to deal with the company.

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

Good serum

I am lucky to always have had long eyelashes, but inevitably as one gets older a serum always helps. I have noticed a slight increase in length since using the serum, even my lower lashes which are long. Good price at the moment and I like no delivery fee!

February 15, 2026
Unprompted review
Rated 5 out of 5 stars

I truly appreciate your kind…

I truly appreciate your kind understanding and the refund was there before I thought about it again, thank you:-) My daughter has done it again, so I thought in all fairness we will give it a go as I have sparse eyelashes from treatment, and I think my daughters are fine, but you get that lol I have truly appreciated your understanding, and I understand the US dollars:-)Here goes and thank you again :-)14

February 14, 2026
Unprompted review
Rated 5 out of 5 stars

Easy checkout and delivery

Easy checkout and delivery. Everything you need in one box and it even comes with a cute cleanser for your eyelashes and serum. Easy application 15/20 mins start to finish and lasts about 6-8 weeks on me. I used size m x

February 14, 2026
Unprompted review
Rated 1 out of 5 stars

Been using for weeks and my lashes have…

Been using for weeks and my lashes have not changed at all. Waste of money and time.

February 13, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Claire, 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 4 out of 5 stars

Mixed response to this product

Mixed response to this product. The delivery took ages as it came from china which I didn’t realise was the case when I ordered it. The tube feels like there is not a lot of product in it. Despite these 2 negatives, my eyelashes are definitely showing improvement so we shall see!

February 1, 2026
Unprompted review
Rated 5 out of 5 stars

Trust this company

Trust this company ! The products work wonders, it’s natural too with no harmful chemicals. My lashes have grown 10% longer in just 2 weeks of use.
Great communication when you need to ask questions also !
I shall continue to purchase :)

February 6, 2026
Unprompted review
Rated 5 out of 5 stars

Wow. Best eyelash serum ever

This product has really enhanced my eyelashes in a way no other eyelash serum has. The growth was rapid. I saw a difference within two to three weeks. The serum is very gentle and has caused no irritation to my eyes whatsoever. The delivery if my order was very quick. I highly recommend Diablo eyelash serum.

February 6, 2026
Unprompted review
Rated 5 out of 5 stars

Diablo lashlift and brow lamination

A client of mine who also works as a beautician recommended this products for lash lifts and brow lamination treatments. I purchased my first product back in 2025 and have never been disappointed. I highly recommended for those who are in the beauty industry to use and for those who do there own treatments. It's such a super easy product to work with and the outcome from the treatment is always fabulous!!

February 8, 2025
Unprompted review

The Trustpilot Experience

Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.

We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.

Learn about Trustpilot’s review process.

Here are 8 tips for writing great reviews.

Verification can help ensure real people are writing the reviews you read on Trustpilot.

Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.

Take a closer look