Léo Grasset — Science docus made with love on improbable subjects.
Mega

Léo Grasset

Science docus made with love on improbable subjects.

Human
Verified
France
French
8.0/10CFB Rating
Outstanding

Léo Grasset is the creator behind DirtyBiology, a popular French YouTube channel. He produces engaging and humorous scientific documentaries. The channel explores diverse topics ranging from biology to psychology and history.

Total reach
1.2M
Known for
He is notable for his engaging, humorous, and deeply researched scientific documentaries on YouTube.
dirtybiology

Léo Grasset follower count by platform

Latest recorded followers, subscribers and engagement on each platform.

1.2M

as of Oct 13, 2026

Followers

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Who is Léo Grasset?

Léo Grasset is a mega-reach creator based in France, publishing in French and working mainly in movies & tv and education, with 1.2M combined followers across the platforms we track.

Léo Grasset is the creator behind DirtyBiology, a popular French YouTube channel. He produces engaging and humorous scientific documentaries. The channel explores diverse topics ranging from biology to psychology and history.

Science docus made with love on improbable subjects.

On CreatorFanBase this page is a data profile, not a fan page: the numbers below come from YouTube and the other platforms they actually publish on, and we drop anything we cannot confirm rather than estimate it.

Best known for
He is notable for his engaging, humorous, and deeply researched scientific documentaries on YouTube.
Account type
Human
Main focus
Movies & TV and Education
Based in
France
Language
French
Combined followers
1.2M
Reach band
Mega (1m – 10m followers)
Biggest platform
YouTube — 1.2M
Numbers last checked
Oct 13, 2026

Related questions

What is Léo Grasset best known for?
He is notable for his engaging, humorous, and deeply researched scientific documentaries on YouTube.. Main niches: Movies & TV, Education.
What language does Léo Grasset create in?
Mainly French. Language is a strong signal of where an audience sits, so it is worth checking before a campaign.
Where is Léo Grasset based?
Public profiles place Léo Grasset in France, posting mainly in French. We only publish the country a creator's own platforms and public reporting support, and we do not publish claims about ethnicity, religion or private address details.

How big is Léo Grasset's audience?

Léo Grasset has 1.2M followers in total, which puts this profile in the mega band (1m – 10m followers). The largest single audience is on YouTube with 1.2M followers — about 100% of the total reach.

What 1.2M combined followers actually means

Combined reach is the sum of followers and subscribers per platform. It is not unique people: audiences overlap, so treat it as a size indicator for shortlisting rather than a guaranteed audience.

Related questions

How many followers does Léo Grasset have in 2026?
Léo Grasset has around 1.2M followers in total across 1 tracked platform in 2026: 1.2M on YouTube. Counts are public platform figures and shift daily, so treat them as close approximations.
Is Léo Grasset gaining or losing followers?
A reliable answer needs several comparable monthly checks across the same platforms. CreatorFanBase does not yet have enough monthly history to label Léo Grasset's audience as rising or falling, so the current verified platform totals are shown without inventing a short-term trend.
Which platform is Léo Grasset biggest on?
YouTube, with about 1.2M followers — roughly 100% of a 1.2M total following. That places Léo Grasset in the Mega band (1M – 10M followers).

Léo Grasset's followers by platform

Here is where Léo Grasset's audience actually sits, platform by platform, using the latest count we recorded on each one (last checked Oct 13, 2026).

Every handle above links to the official account, so you can open it and check the numbers yourself before you reach out.

Léo Grasset follower count by platform (last checked Oct 13, 2026)
PlatformFollowers / subscribersShare of reachOfficial handle
YouTube1.2M followers100%@dirtybiology

Official handles and live links

Every handle on this page links to the official account. If you are verifying Léo Grasset before a deal, open the profiles directly rather than trusting screenshots — the live number is always one click away.

Related questions

How many followers does Léo Grasset have on YouTube?
Léo Grasset has about 1.2M followers on YouTube as of the latest recorded check, which is roughly 100% of Léo Grasset's total 1.2M following. The handle links on this page go straight to the live profile so you can confirm the number yourself.
What are Léo Grasset's official social media handles?
dirtybiology on YouTube. Every handle here links to the live profile, so anything not listed on this page is not a handle we have been able to confirm for Léo Grasset.

Who follows Léo Grasset?

Léo Grasset is based in France and posts in French. For brands that usually means the core audience follows the same market and language, with a long tail from everywhere else — big accounts rarely stay local.

The content sits in movies & tv and education, so the people watching are self-selected for those interests. That is the useful part of a niche profile: a mid-size account inside the right category often beats a much larger general account, because the audience already cares about the subject.

If you need the same audience profile in another market, the country and language lists on CreatorFanBase let you line up comparable creators side by side instead of guessing.

What does Léo Grasset post?

Léo Grasset publishes mainly on YouTube, in the movies & tv and education space. YouTube-first accounts skew towards longer watch time, which suits explanation, review and demo formats.

Léo Grasset is the creator behind DirtyBiology, a popular French YouTube channel. He produces engaging and humorous scientific documentaries. The channel explores diverse topics ranging from biology to psychology and history.

We do not rate content quality on this page. What we do keep accurate is size, platform mix and identity, so you can judge fit yourself and go straight to the account.

Related questions

Who are creators similar to Léo Grasset?
CreatorFanBase lists comparable names in movies & tv, education and in France, filterable by follower size, country and language. The related links on this page are the quickest route to the closest matches.

Léo Grasset's earnings and net worth

Public net worth and earnings figures for Léo Grasset are estimates published by third parties, not verified accounts, and they vary widely. CreatorFanBase does not publish a number we cannot source, so treat any figure you see elsewhere as a guess.

How much does it cost to work with Léo Grasset?

What can be said from data: at 1.2M combined followers, Léo Grasset is in the mega band, and rates in that band are set case by case — by deliverables, exclusivity, usage rights and campaign length, not by follower count alone. The only reliable price is the one quoted by the creator or their management.

How to contact Léo Grasset for a brand deal

Send a collaboration brief with the form on this page and the CreatorFanBase team will reach out, negotiate rates and confirm deliverables for you. Prefer to go direct? The official accounts and links are listed here too.

Related questions

What is Léo Grasset's net worth?
Figures circulating online for Léo Grasset are third-party estimates that vary widely between outlets, so treat any single number as an estimate rather than verified financials.
How much does Léo Grasset earn per post?
There is no public rate card for Léo Grasset. Budget guidance on this page is $14K – $35K per post, a range from the combined public follower count. Rates move with usage rights, exclusivity, format and territory, so use Léo Grasset's 1.2M combined reach and mega band as a starting point and negotiate directly.

Working with Léo Grasset

If you are shortlisting Léo Grasset for a campaign, these are the facts worth carrying into the brief. Everything here is stored data, refreshed on a schedule rather than typed in once.

A practical sequence: check the lead platform matches where your buyers are, check market and language, open the official account to see recent posting frequency, then ask for a media kit and rate card directly.

Lead platform for a brief
YouTube
Category fit
Movies & TV and Education
Budget signal
Mega audience (1m – 10m followers)

Related questions

Is Léo Grasset a good fit for a brand campaign?
Léo Grasset sits in the Mega band (1M – 10M followers) in movies & tv and education with a France-led audience. Smaller bands usually convert harder per follower while larger ones buy reach, so match the band to whether the goal is awareness or sales.
How can brands contact Léo Grasset?
Use the official handles linked on this page, and include the campaign scope, deliverables, timeline and budget in your first message.

How we verify Léo Grasset's numbers

Léo Grasset's counts come from the platforms themselves via Apify YouTube public channel and are refreshed on a schedule; the most recent check was Oct 13, 2026. When a platform blocks a read, we keep the last verified number and show where it came from instead of filling the gap with an estimate.

How often the numbers are refreshed

Large jumps are treated as suspect: a sudden drop past our safety threshold is held back for review rather than published, which is why the numbers here tend to be lower-drama than screenshots circulating elsewhere. Found something out of date? The profile links on this page go to the official accounts, so the live number is always one click away.

Related questions

Is Léo Grasset a real verified account?
Yes — Léo Grasset's profile on CreatorFanBase is checked against the live platform pages linked above, and follower numbers come from public platform data rather than self-reported claims. If a link ever breaks we drop the number instead of guessing.
When were Léo Grasset's follower numbers last updated?
The most recent recorded check was Oct 13, 2026. Counts are refreshed on a rolling schedule from public platform data, and a sudden unexplained drop is held back for review rather than published.

Is Léo Grasset gaining or losing followers?

Follower growth is best judged across several comparable monthly checks, not a few days of snapshots. CreatorFanBase does not yet have enough monthly history to call a reliable rise or fall for Léo Grasset; the current platform totals above remain the clearest view of audience size.

Léo Grasset's Fan Score

CFB Rating 8.0 out of 10, and what fans think.

Audience reach7.7 / 10
Platform presence7.0 / 10
Profile depth9.5 / 10

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More about Léo Grasset

Other questions people ask about Léo Grasset.

Where is Léo Grasset from?
Léo Grasset is based in France and publishes in French. We have not published a confirmed date of birth for Léo Grasset yet.

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    How to contact Léo Grasset for a brand partnership

    Official channels and links

    Business email: most creators publish a business address in their profile bio or on their website. We only list contact details a creator has made public themselves, so where no public address exists, use a direct message on the platform above.

    Brand checklist before you approach Léo Grasset

    1. 1.Confirm the follower counts yourself on each official profile before signing anything.
    2. 2.Ask for a recent audience breakdown: country, age split and share of real engagement.
    3. 3.Ask who is authorised to agree the deal — the creator, or a named agency.
    4. 4.Agree deliverables in writing: number of posts, platform, usage rights and duration.
    5. 5.Check past brand work in the same niche for conflicts or exclusivity clauses.
    6. 6.Agree how results are measured and reported before the campaign starts.

    Budget guidance: $14K – $35K per post (estimate). Estimates use combined public follower counts. Up to 10 million followers, we show a planning range; above 10 million, we show an open-ended starting estimate because campaign scope drives the final fee. Compare rate estimates by niche →

    Open for collaboration requests

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    Data & sources

    How the numbers on this page are collected and what they mean.

    Last updated
    Oct 13, 2026
    Where it comes from
    Apify YouTube public channel
    Accuracy
    Follower counts are approximate public figures and net-worth figures are third-party estimates, not verified financials. Spotted an error? Send a correction.

    References and further reading

    People also ask

    Straight answers to the questions people search for.

    How many subscribers does Léo Grasset have?

    Léo Grasset has about 1.2M YouTube subscribers in the latest snapshot stored on this profile. Quote the profile and the date together. Use the YouTube row when the brief is on that network. A newer snapshot replaces this one on the weekly refresh described on the methodology page.

    What does a sponsored post from Léo Grasset cost?

    Use $14K – $35K only as a planning estimate for one sponsored post from Léo Grasset. It uses the combined public follower count across the platforms stored here, not a rate card Léo Grasset sent us. Usage rights and extra posts move the real fee. The method is on the methodology page.

    Is Léo Grasset verified?

    The profile marks Léo Grasset as verified. That flag means the handles were matched to the public accounts, so start there when you send a brief. A mismatch can be reported on the contact page and we check it against the official channel.

    Where is Léo Grasset based?

    France is the country on Léo Grasset's profile. Use it when you need creators from that market, then open a recent post if the city matters. A city is not stored separately. The wider set of creators tagged France is on the country list.

    What language does Léo Grasset post in?

    Léo Grasset is tagged as French-speaking on this profile. Use that when the script or the voiceover has to be in French, then watch a recent post to confirm the mix. One tag can cover more than one language in the work. Other French creators can be filtered in search.

    What does Léo Grasset post about?

    Movies & TV is how Léo Grasset is grouped in the directory, with French as the language tag. Start there, then read a recent post before you decide the fit. The posts decide whether the label is enough. More people in that niche are on the Movies & TV category.

    How do I email Léo Grasset for a brand deal?

    Send a collaboration brief from the form on this profile, or use the official links to reach Léo Grasset directly. Our team reaches out and negotiates the fee for you. Write one clear deliverable and ask for their rate. This profile shows the handle and the official links. A plan only opens search results after the first 5, on pricing.

    Who are creators similar to Léo Grasset?

    Similar profiles are linked on this page. For a wider set in the same niche, open the Movies & TV category and add a country or follower size if you need a shorter list. Read a few recent posts before you decide who to email.

    When was Léo Grasset's follower count last updated?

    The newest follower snapshot stored for Léo Grasset is 13 October 2026. Counts refresh on a weekly schedule, and a missing new reading keeps the previous date rather than inventing one. Put that date next to the number if you quote it. The schedule is on the methodology page.

    Does Léo Grasset match a movies & tv campaign in France?

    Léo Grasset is tagged Movies & TV, France in the directory, so that is the audience a brand can start from. The tag is a filing label, not a sales result, so watch a recent post before you brief anyone. Then compare a few others with the same tag on the Movies & TV list.

    Can Léo Grasset promote a film, show, app or product launch?

    You can ask. Send a brief from the collaboration form on this profile with the product, the deliverable and your dates, and the CreatorFanBase team reaches out to Léo Grasset and negotiates for you. Film and TV audiences respond to launches, premieres and behind-the-scenes formats, so pitch a format that matches recent posts. Léo Grasset decides whether to accept. See the managed option on pricing.

    How much does a YouTube video from Léo Grasset cost?

    Our planning estimate for one sponsored post from Léo Grasset is $14K – $35K. Stories usually cost less than a feed post or reel, and usage rights, exclusivity and extra posts raise the fee. It is an estimate, not a quote — Léo Grasset sets the real rate. The method is on the methodology page.

    Who are the best movies & tv influencers in France like Léo Grasset?

    Léo Grasset is one of the Movies & TV profiles in France on CreatorFanBase. Open the Movies & TV category and filter by country, language and follower size to see others ranked by audience. Every filter and follower count stays open; names after the first 5 results need a plan.

    Where can I hire movies & tv influencers in France?

    Start in search with the Movies & TV category and France as the country, then set a follower range that fits the budget. Shortlist a few names like Léo Grasset, compare their platform split, and send a brief — or let CFB Agency run outreach and negotiation for you.

    Is Léo Grasset a good choice for a French-language campaign?

    Léo Grasset is tagged French on this profile, so a script in French is a natural starting point. Check a recent post to confirm the language mix before you brief. Other French-speaking creators can be filtered in search.

    Who manages Léo Grasset's brand deals?

    We do not publish private management contacts. Use the official links on this profile, or send a brief from the collaboration form and the CreatorFanBase team will reach Léo Grasset's team for you and negotiate the deal. Plans and the managed option are on pricing.

    How do I find Léo Grasset's official profiles?

    The official accounts we have for Léo Grasset are the links on this profile, starting with YouTube. Use those when you write, and compare the handle with the channel you already know. Or send a brief from the profile and the CreatorFanBase team will reach out and negotiate for you. A wrong link can be flagged on the contact page.

    How many platforms is Léo Grasset on?

    Léo Grasset has 1 platform with a stored follower or subscriber count on this profile, led by YouTube. A missing network means we do not have a public count for it yet, not that the account cannot exist. The rows are listed on the profile. Browse a single network from the creator lists.

    Is CreatorFanBase Léo Grasset's agency?

    Not through a forum post. Send a brief from the collaboration form on this profile and the CreatorFanBase team will reach out to Léo Grasset for you. Use the official links on the profile and ask Léo Grasset for a fee. Plan prices for directory access are separate, on the pricing page.

    How do I save Léo Grasset to a shortlist?

    Open this profile and save Léo Grasset while you compare a few other names. Saving a name does not email the creator. Growth and Agency include unlimited shortlists. Starter includes three. The plan differences, starting at $29 a month, are on the pricing page.