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 shop

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 1 out of 5 stars

Disappointing eyelash serum

I ordered the heavily advertised eyelash serum but after four weeks am not seeing any difference. Disappointingly, the tube feels very empty and I think I'm down to the last dregs already, making this very expensive as well as ineffective.

31 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Kbot, 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

Salon quality at home

It’s not often you can buy a product at a great price and get salon results at home. This is so easy, I do it on a Sunday morning with my children running round my feet, it’s easy to do, fairly quick and the results are actually amazing. Whenever I’m feeling a bit frumpy or need a lift I do my lashes and it gives me such a confidence boost. I have really short, straight and fine lashes so if it works for me it would work for anyone. Literally no reason to get this done at a salon with this kit on the market!!

1 February 2026
Unprompted review
Rated 1 out of 5 stars

Very disappointed in the Diablo eyelash…

Very disappointed in the Diablo eyelash serum. I used it every single night for 12 weeks and it made absolutely no difference to my lashes. I gave up using it and ordered some UKlash serum, as I know that really works.

29 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Beth, 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 1 out of 5 stars

Absolute rubbish

Absolute rubbish. Have been using Revitalist which is very expensive but works. Tried Diablo and within a week I have short thin eyelashes. Don't waste your money.

14 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Isabelle, 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 1 out of 5 stars

Sorry I wish I could promote this product

Sorry I wish I could promote this product but I cant. The eyelash serum hasn't done anything to my eyelashes.

28 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Nicole, 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

Imran was amazing

Imran was amazing, he sorted out my issue really quickly with excellent customer service. My package got lost and they offered refund or replacement straight away and I got a voucher!

23 January 2026
Unprompted review
Rated 1 out of 5 stars

Lash serum

I ordered the lash serum and it was completely dry ! :(

21 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Anna. We're very sorry to hear that the Eyelash Serum you received appeared to be dry. This is certainly not the experience we want our customers to have.

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

Top notch! Highly recommend

The customer service is the best I’ve experienced with brands so far.
In regards to the product, I’ve used the lash growth serum for a little while now and I’ve experienced no discomfort whatsoever, so I would recommend it to even those with sensitive eyes who are trying to grow out their natural lashes.

20 January 2026
Unprompted review
Rated 2 out of 5 stars

I have bought from Diablo a couple…

I have bought from Diablo a couple times and love the product. This time my order was marked as delivered but never arrived. I emailed and no one got back to me. Very disappointing customer service.

13 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback. We're sorry to hear that your order was marked as delivered but did not arrive, and that you didn't receive the response from our Customer Support team that you were expecting. We completely understand how disappointing and frustrating this must have been.

We'd really appreciate the opportunity to investigate what happened with your delivery and our communication. Please email info@diablocosmetics.com with your order number or the email address used to place your order, and we'll look into this as a priority and work towards a suitable resolution.

Kind regards,
Diablo Cosmetics Support

Rated 4 out of 5 stars

This works for me

Their ads show very lush long lashes, which does set up high expectations, but I do feel like Diablo serum has given me slightly longer lashes, which is better than I’ve had with most other products

15 January 2026
Unprompted review
Rated 2 out of 5 stars

disappointed with their eyelash serum

really disappointed with their eyelash serum, which ive been using for over 4 months now and my lashes look worse than ever! sparse, different lengths and some are straight and some are normal - never had this issue before. i stopped using UKlash to try something more gentle but will be going back now. Also, the bottle is annoying as the tip doesn't get the serum so have to shake and wait for a droplet to reach the tip. shame

14 January 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Joni, 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

Didn’t work

Didn’t work. Despite consistent use over many weeks there was no change at all to my eyelashes.

4 November 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, Kel, 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.

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