How did Collosol collect 2,869 reviews and 2,161 social posts from its own ambassadors?
Collosol, a Paris makeup remover brand since 1955, has had its own community try its cleansers since 2019. Across 89 campaigns, 3,438 selected ambassadors left 2,869 reviews and published 2,161 posts on Instagram, TikTok and Facebook. Reviews appear on the product pages of its website, with an average rating of 4.8 out of 5.
Collosol ambassador program since 2019
Case study published on by Trustt
- 3,438ambassadors selected by the brand
- 2,869reviews left by ambassadors
- 2,161posts, including 1,554 on Instagram and 290 on TikTok
- 1.18Mviews on Instagram, TikTok and YouTube
- 469,360engagements on the posts
Trustt software, data as of October 12, 2026: records and reports of the 89 Collosol campaigns run from April 2019 to September 2026, 58,833 applications in total. Selections counted campaign by campaign: the same person may take part in several campaigns. Views: a floor figure, since photo posts have no view counter. Campaign figures published with Collosol’s approval; no sales, pricing or customer data is disclosed.
The essentials in 30 seconds
For beauty, nutrition and pharmacy brands that want reviews on every product and real usage content, without handling shipping and reminders by hand.
- Brand
- Collosol, makeup removers and face cleansers made in France, “the star of makeup removers since 1955”
- Category
- Beauty: makeup removers, cleansers, makeup removal accessories
- Period
- April 2019 to September 2026, 89 campaigns: 83 product review campaigns, 3 Instagram and TikTok creator campaigns, 3 events
- Software
- Trustt: ambassador program, product reviews, Instagram and TikTok campaigns, Trustt Reviews on the brand’s website
- Key results
- 3,438 ambassadors selected from 58,833 applications, 2,869 reviews, 2,161 social posts and 469,360 engagements. Cumulative reach of 1,181,531 views: sum of the reports of the 89 campaigns, a floor figure since photo posts have no view counter; the most viewed video accounts for 18% of it (211,600 views). On the brand’s website, 3,170 reviews displayed, with an average rating of 4.8 out of 5 (data as of October 12, 2026)
An iconic makeup remover that proves itself on the skin
Collosol has been making makeup removers in France since 1955. Its signature product, the Eau de Lait, is a cleansing milk lotion in an instantly recognizable bottle; around it, the range now includes the Chantilly cleansing foams, the Huile Extra cleansing oil, the two-phase Mi-Eau Mi-Lait, the Pain au Lait cleansing bar, wipes and accessories (headband, makeup remover pads, toiletry bag).
The brand sells on its own website and highlights vegan formulas of natural origin and a strong sensory signature: textures, bottles, scents.
A makeup remover is not judged on a product shot. It is judged in the evening, on a full face of makeup, and by how the skin feels the next morning. In 2019, the brand wants its products tried and rated by women who remove their makeup every day, product after product.
Photos posted by program ambassadors.
Getting every product tried by women who remove their makeup every night
A makeup remover brand refreshes its formats, gift sets and routines every season. Three teams expect something from the same program.
- 01Product manager
Reviews on every product
Feedback from people who actually use the product, on texture, scent, waterproof makeup and how the skin feels afterwards, for every new format and every gift set.
- 02E-commerce
Product pages that reassure
Recent, detailed reviews on the website’s product pages, for a shopper hesitating between a cleansing water, an oil and a foam.
- 03Social media
Makeup removal filmed by real followers
Crash tests, evening routines and unboxings posted by accounts their followers trust, alongside brand visuals.
The challenge: a makeup remover proves itself through use.
It takes several evenings, everyday makeup and sometimes waterproof mascara to form an opinion. That calls for regular ambassadors, tracked shipments and well-timed reminders, campaign after campaign, across a range of about twenty products. Sorting thousands of applications and chasing people one by one does not scale without software.
An ambassador program to get products tried, rated and shared
The brand publishes its campaigns on its Trustt ambassador program: one product or routine per campaign, 30 to 60 spots, and a hashtag to find the posts, such as #routinedivine.
Three formats run side by side. Product review campaigns (83) send a product to ambassadors who rate it after use and, depending on the campaign, post about it. Creator campaigns (3) send a routine to video creators who show it on camera. Events (3) bring ambassadors together around makeup removal, such as at the Printemps department store in March 2025.
Reviews flow onto the website’s product pages with Trustt Reviews. The recruited ambassadors remain the brand’s, not Trustt’s. The brand also decides what is made public, including in this case study.
What the software handles
- Calls for applicationsOn the brand’s ambassador program
- Panel selectionQuestionnaire (skin type, for example), then profile selection by the brand
- Shipping and remindersParcel tracking and automatic reminders
- Reviews and posts collectedReviews published on the website, posts linked by hashtag
- ReportsCampaign by campaign
- Collosol
Chooses the products and routines, selects profiles before shipping and decides what is made public.
- The ambassadors
Apply, receive the product, use it at home, leave a review and post while disclosing the collaboration.
- The Trustt software
Hosts the program, tracks shipments, sends reminders, collects reviews, displays them on the website, links posts and compiles reports.
- The Trustt team
Runs recruitment, suggests the campaign calendar and presents the results.
Three choices that make the difference for a skincare brand
- 01Routines
Getting the full ritual tried
A gift-boxed routine has two or three products tested together, the way they are used at night. Routine Nomade, March 2023: 59 reviews and 62 posts from 60 ambassadors.
- 02Calendar
A campaign every two to three weeks in 2023
Each product comes back on the calendar several times, which keeps recent reviews on every product page. In 2023, 24 campaigns: 730 reviews and 827 posts over the year.
- 03Video creators
Creators for TikTok
Alongside review campaigns, creator campaigns send a product to video creators. Huile Extra, December 2023: 30 creators, including the most viewed video of the program, 211,600 views.
Campaign records and reports, Trustt software, data as of October 12, 2026.
3,438 ambassadors, 2,869 reviews and 2,161 posts since 2019
From 58,833 applications, 3,438 ambassador spots were awarded. The program starts in 2019 with the Eau de Lait, puts the whole range on the calendar from 2023, then focuses its 2026 campaigns on reviews.
The program, year after year
| Period | Selected | Posts | Reviews |
|---|---|---|---|
| 2019 to 202214 campaigns | 728 | 217 | 609 |
| 202324 campaigns | 902 | 827 | 730 |
| 202417 campaigns | 774 | 603 | 709 |
| 202523 campaigns | 650 | 514 | 497 |
| 202611 campaigns, reviews only | 384 | n/a | 324 |
| Total | 3,438 | 2,161 | 2,869 |
Campaign records and reports from the Trustt software, data as of October 12, 2026, by year applications opened. “n/a”: posts not requested in the 2026 review-only campaigns. One 2026 campaign is still running.
- Eau de Lait433 reviews, 4.6
- Chantilly Nettoyante292 reviews, 4.7
- Huile Extra212 reviews, 4.8
- Mi-Eau Mi-Lait190 reviews, 4.8
The brand’s Trustt Reviews catalog, data as of October 12, 2026.
1,554 Instagram posts and 290 TikTok videos by Collosol ambassadors
Crash tests on a full face of makeup, evening routines, unboxings of the headband or the toiletry bag: ambassadors use the products at home and show how. Collosol selects every profile before shipping.
12,000 viewsTikTok
2,200 viewsTikTok
824 viewsTikTok
715 viewsTikTok
498 viewsTikTok
372 likesTikTok
View on Instagram8,500 viewsInstagram
View on Instagram2,200 viewsInstagram
View on Instagram1,900 viewsInstagram
Posts saved by the team in the Trustt software, views recorded post by post on October 12, 2026 (likes when the social network does not provide views). Every post discloses the collaboration with the brand.
The Routine des Essentiels: 1,189 applications for 60 spots
In April 2024, Collosol opens 60 spots for its Routine des Essentiels, which pairs the Chantilly cleansing foam with the Eau de Lait. Applications stay open for two weeks, from April 26 to May 9, 2024.
Ambassadors receive the routine, use it at home during the test, then leave their review and post. A single campaign thus delivers reviews for the product pages and content for social media.
- 1,189applications
- 60ambassadors selected
- 54reviews left
- 51posts, including 10 on TikTok
Record and report of the April 2024 Routine des Essentiels campaign, Trustt software, data as of October 12, 2026. For this single campaign: 14,788 engagements and 74,662 views recorded on Instagram and TikTok.
Seven years on, a community that gets the brand tried night after night
Starting from the need to get its makeup removers tried, the brand now counts 3,438 ambassador spots awarded from 58,833 applications, 2,869 reviews, 2,161 posts on Instagram, TikTok and Facebook, and an ambassador base it owns.
- For marketing leadership
Seven years of results readable campaign by campaign, from application to review and post, ready to present to the board as they are.
- For the product manager
Reviews on every product and every new format: the Huile Extra 100 ml alone, run through five campaigns, has gathered 157 ambassador reviews.
- For e-commerce
Reviews appear on the website’s product pages with Trustt Reviews: 433 reviews on the Eau de Lait page, 3,170 across the whole catalog.
- For the CEO
An asset that stays: an ambassador base owned by the brand, ready to reactivate for every launch, and public disclosure decided by the brand alone.
Reviews and micro-influence for a skincare brand: questions brands ask
How many reviews and posts has the Collosol ambassador program produced?
2,869 reviews and 2,161 social posts from April 2019 to September 2026, across 89 campaigns: 1,554 Instagram posts, 290 on TikTok, 257 on Facebook and a few others, for 469,360 engagements and at least 1.18 million views. Trustt software, data as of October 12, 2026.
Does an ambassador program work for a makeup remover brand?
Yes, when the product proves itself through use. Collosol campaigns drew 58,833 applications for 3,438 spots, and 85% of ambassadors in review campaigns left a review: 2,869 out of 3,368. Trustt software, data as of October 12, 2026.
Are the ambassadors paid?
In review campaigns, Collosol ambassadors receive the product to test for free, without payment, and disclose the collaboration in their posts. In return, they leave a review and, depending on the campaign, post on their social accounts. 3,438 product shipments have been awarded since 2019.
How does the brand choose its ambassadors?
Each applicant fills in a questionnaire, for example about their skin type. Collosol then selects the profiles before shipping: 3,438 spots awarded from 58,833 applications since 2019, fewer than one application in ten.
Where are the ambassador reviews displayed?
On the product pages of the Collosol website, with Trustt Reviews, alongside customer reviews. The catalog holds 3,170 reviews with an average rating of 4.8 out of 5, including 433 on the Eau de Lait. Ambassador reviews are obtained in exchange for a free product. Data as of October 12, 2026.
How are the posts tracked?
Each campaign has its own hashtag, for example #routinedivine. The Trustt software links Instagram, TikTok, Facebook and YouTube posts to the campaign, with their views when the social network provides them: 2,161 posts linked across the 89 campaigns.
What brand data does a Trustt case study make public?
Only what the brand agrees to publish. Here, Collosol approved campaign figures (applications, selections, reviews, posts, reach) and posts already visible on the ambassadors’ own accounts. No sales, pricing, contract or customer data is disclosed.
Other case studies: Lancôme, Crinex, all Trustt case studies, and the French version of this case study.
Get its products tried by its own ambassadors
Beauty, nutrition and pharmacy brands: Trustt runs the ambassador program, from the call for applications to reviews on product pages and posts on Instagram and TikTok.
