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

Complete waste of money

Complete waste of money. Hyped up Chinese rubbish that made no difference to either the length or thickness of my lashes despite four weeks of daily - sometimes twice daily - use. Feel completely swindled. It obviously is sent straight from China, save your money and buy something British instead.
Update - six months after this review they have agreed to a 50% refund.

January 7, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thanks for taking the time to review the serum, 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

Excellent customer service

Excellent customer service sending out a replacement product. Quick and friendly response to emails. I never leave reviews but I would definitely not hesitate from ordering. The lash lift products are brilliant.

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

Wish I'd discovered your amazing…

Wish I'd discovered your amazing product years ago! I was amazed how well my first attempt at the lash lift turned out! The products were gentle and the timings were perfect! I am due to redo the process soon, so I hope I have the same professional result! Saves me an absolute fortune not having to go to the salon now! THANK YOU Diablo!!

December 6, 2025
Unprompted review
Rated 2 out of 5 stars

I have never received my order

I have never received my order, no answer to any emails no phone number listed! DO NOT ORDER FROM THIS COMPANY. ITS FRAUD AND A SCAM

January 3, 2026
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback Darcy. We're very sorry to hear about your experience and understand why you feel frustrated. We'd like the opportunity to investigate what has happened with your order and any previous correspondence.

Please email info@diablocosmetics.com with your order number or the email address used to place your order, and we'll review your case as a priority and work towards a resolution.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Exceptional customer service at Diablo cosmetics

I had a little issue with my lash serum so I contacted the company. Within no time at all, I received a reply email with a solution to my problem. It was dealt with professionally and at utmost speed. Their customer service guy (Imran) is extraordinary! Communication was very efficient. What a brilliant company! Everyone could take a leaf out of their book 😃

December 20, 2025
Unprompted review
Rated 5 out of 5 stars

Excellent product

Excellent product, truly works, no bad ingredients or adverse reactions. No discolouration under my eyes unlike previously with other similar products from different manufacturers. Good to know I’m using a safe ethical product.

December 23, 2025
Unprompted review
Rated 5 out of 5 stars

A happy Diablo Eyelash Serum user.

I am 78 and my eyelashes were disappearing, after using this Serum I can now use mascara again. I still have some left so I hope they get a little bit longer and when my friends ask if they are false I will let them know my secret.

December 19, 2025
Unprompted review
Rated 5 out of 5 stars

There's a pretty intense learning curve…

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 reaction if it touches my eyelid so I don't glue the pad to my eyelid and it stays okay (once I trimmed the edges) if the lashes are sticky enough themselves. Gotta make sure every lash is stick straight and exactly where you want it cuz it won't budge once you complete the process. Almost returned it after I first purchased it due to the allergic reaction and struggle doing it correctly but I'm glad I stuck it out and found what works!

December 13, 2025
Unprompted review
Rated 5 out of 5 stars

Best home lash lift product

I've used many lash lift kits as I prefer doing them at home and this is the strongest one I've found in comparison to what I've had done during a lash service. It's strong enough to last a couple months, you don't have to leave it on very long which is really helpful when you are doing one eye at a time. And I have never over processed my lashes with this product. I do wish they offered one with keratin in the kit, nutrition packets are not the same as keratin. But you can buy keratin packets separately elsewhere and the nutrition is still a really good substitute. I've purchased much more expensive kits on Amazon that just do not outperform this product. If you're on the fence I would definitely give it a try!

April 1, 2025
Unprompted review
Rated 5 out of 5 stars

Excellent customer service. Highly recommend

I contacted Diablo via email as I had a little issue that I needed assistance with. I was replied to very quickly which was helpful. Plus the content of their email was exemplary and therfore I can say their customer service is excellent. This was my first purchase from diablo and hope to purchase in the future. Highly recommend. Thank you

December 6, 2025
Unprompted review
Rated 5 out of 5 stars

Ok where to begin

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. Tried another but that didnt appear to help. I then tried Diablo, didnt expect it would be any better than the others. However Diablo was a different experience...after a week or two I could see a difference, a big difference. Having used my leftovers I decided to return to Diablo and know its going to be on my bathroom window for a while longer.

December 3, 2025
Unprompted review
Rated 5 out of 5 stars

I was impatient at first


I was impatient at first, but wow — it’s really starting to make a difference! My lashes look fuller and longer. I’ve already repurchased two so I never run out, and I’m even gifting one for Christmas!

November 30, 2025
Unprompted review
Rated 1 out of 5 stars

Order 12515857629571

Order 12515857629571
9 days since order placed. No goods have arrived which are now evidently come from China. This isn’t made clear on the website where your goods start their journey from. Some contact with customer service but as soon as I requested a refund I have heard nothing. They don’t respond. If you want your goods promptly, DO NOT ORDER FROM THIS ROBIN HOOD company. Totally unreliable, they will take your money and it’s a lottery if/when you get what you pay for. I call it simple theft in my book
And then they reply to me 8 months after I have issues with my order. Saying more! Avoid!!!

November 20, 2025
Unprompted review
Diablo Cosmetics logo

Reply from Diablo Cosmetics

Thank you for taking the time to share your feedback. We're very sorry to hear about your experience and understand how frustrating the delay and lack of communication must have been.

We appreciate that the shipping origin and delivery timeframe did not meet your expectations, and we're sorry for any confusion this may have caused. While we are a UK-based company, we use fulfilment centres in different locations to serve our customers efficiently.

We'd like the opportunity to investigate your order and review your refund request as a priority. Please email info@diablocosmetics.com with your order number or the email address used to place your order, and we'll work to resolve this as quickly as possible.

Kind regards,
Diablo Cosmetics Support

Rated 5 out of 5 stars

Edit to previous review

Edit//received one free refill kit. But it was difficult to find the info on this cuz the person I was emailing wasn't the same.
/ After purchasing the refill kit, I sent an email asking if they sell only nourishment oil, cuz this is the BEST stuff for your lashes! They kindly replied that they will send me some extra kits free of charge. I'm telling you this nourishment oil is the best. Maybe in the future it will be available in a separate container. Love. Also I answered to the email that sent me the shipping details and my email didn't go to a bot, I didn't get an ai response I got an actual response from a human!

November 26, 2025
Unprompted review
Rated 5 out of 5 stars

Diablo eyelash serum.…

I would just like to say that Diablo went over and beyond to help me out, and I found them to be very helpful and caring. And the eyelash serum is the best one I’ve used it really works and I would buy again.

November 22, 2025
Unprompted review

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