Several major brands use entirely lowercase names, even at the start of a sentence. adidas, amazon (in some contexts), reddit, and tumblr all use lowercase as part of their visual identity.

The lowercase choice sends a specific signal: approachable, informal, anti-corporate, modern. In a landscape where traditional companies announce themselves with imposing proper-noun capitalization, going lowercase reads as a deliberate rejection of formality.

adidas has used the lowercase styling since its founding and it has become so associated with the brand that capitalizing it looks wrong to anyone familiar with the logo. The same is true for reddit, where the lowercase treatment reinforces the platform's image as a grassroots community rather than a media corporation.

For new brands, all-lowercase names also work better as domain names and social handles — where capitalization is irrelevant — which has contributed to the convention spreading in tech and consumer brands founded after 2000.

On the opposite end, several major brands use all capitals even when their names are not acronyms: IKEA, ZARA, H&M, LEGO, NASA, CNN.

Some of these (NASA, CNN) are genuine acronyms where all-caps follows standard abbreviation rules. But IKEA (which stands for Ingvar Kamprad Elmtaryd Agunnaryd — the founder's name and hometown) and ZARA (not an acronym) use all-caps as a pure visual choice.

All-caps conveys authority, permanence, and confidence. It takes up visual space and reads as an announcement. In retail and media — where brands compete for attention on signage, screens, and shelves — the visual weight of all-caps makes a name impossible to miss.

LEGO is a distinctive case: the company is emphatic that the brand name should always be written in all capitals and never used as a noun (not 'a lego', always 'a LEGO brick'). This is an attempt to protect the trademark — a genericized trademark (like 'escalator' or 'thermos') loses legal protection, so the all-caps styling reinforces that LEGO is a brand name, not a common noun.

Many tech brands use camelCase or PascalCase to fuse two words into one identity: YouTube, LinkedIn, WordPress, JavaScript, GitHub, PayPal, FedEx, DoorDash.

The camelCase format solves a specific branding problem: how do you create a name from two recognizable words without a hyphen or space, while still making both words legible? Capitalizing the second word preserves the semantic content of both halves — YouTube is immediately understood as 'your' + 'tube', LinkedIn as 'linked' + 'in', PayPal as 'pay' + 'pal'.

This format became particularly common in tech startups of the 2000s because it worked well in URLs (no spaces) while remaining human-readable. Writing youtube as one word would have taken longer to parse; YouTube is instantly legible.

FedEx and PayPal took this further — both names are contractions (Federal Express → FedEx, Pay by Pal → PayPal) where the capital letter at the junction marks the seam between the two original words.

Apple's decision to name its products iPhone, iPad, iMac, iPod, and iTunes created one of the most recognizable naming conventions in consumer technology. The lowercase 'i' prefix on a capitalized noun breaks standard English grammar rules — and that is entirely the point.

The lowercase 'i' was introduced with the iMac in 1998. Steve Jobs said at the launch that it stood for internet, individual, instruct, inform, and inspire. The visual contrast — a small, intimate lowercase letter paired with a larger, proper-noun capital — made the names distinctive and immediately recognizable.

The convention was so successful that it became a cultural shorthand for Apple products and was widely imitated (and parodied). The grammatical incorrectness is what makes it work: it breaks the pattern of conventional capitalization in a way that is impossible to overlook.

Writing iPhone as Iphone or IPHONE is visually wrong to anyone familiar with the brand — which is precisely the value of establishing a distinctive case format as part of a trademark.

Most major brands actively enforce the capitalization of their names. This matters for several practical reasons:

• ▸Trademark protection: Incorrect capitalization can weaken trademark status if a name becomes genericized. LEGO and KLEENEX are examples of brands that actively fight genericization.
• ▸Brand consistency: A brand that appears as 'Youtube', 'YouTube', and 'YOUTUBE' in different contexts looks disorganized. The official capitalization is the version that appears in the brand's own style guide.
• ▸Editorial standards: Major publications (AP, Reuters, BBC) maintain style guides that specify how brand names should be capitalized. 'eBay' not 'Ebay'; 'iPhone' not 'Iphone'.
• ▸SEO and search: Search engines have become good at handling brand name variations, but correct capitalization in your copy reads as more credible and careful to human readers.

When in doubt, check the brand's official website, press kit, or social profiles. How a company writes its own name in its own content is the authoritative reference.