WhatsApp Usernames: How to Reserve Yours (2026 Guide)

Quick answer

WhatsApp usernames are here. After years of preparation, Meta is rolling out @usernames on WhatsApp in 2026: pick a unique handle (3 to 35 characters, Latin letters, numbers, periods, underscores) and people can message you without ever seeing your phone number. Reservation opened in the app in July 2026, first come first served. The phone number does not disappear: it is still how the account is registered, it just stops being the thing you have to hand out.

What Was Actually Announced

The timeline, in facts:

• October 2024: Meta first disclosed it was working on username support for WhatsApp.
• November 2025: developers and businesses were told the rollout was slated for June 2026.
• June 29, 2026: businesses could start claiming usernames, and country-level adoption began.
• July 7, 2026: the first country wave went live.
• July 2026: username reservation opened in the app globally, ahead of full availability, with the rollout continuing country by country through the rest of 2026.

The format rules are simple: 3 to 35 characters, using Latin letters, numbers, periods and underscores. One username per account, unique across WhatsApp.

Why This Is a Big Deal for Privacy

Until now, messaging someone on WhatsApp meant exchanging phone numbers, the most personal identifier most people carry. Usernames break that link: a classmate, a marketplace buyer, or a customer can start a chat with @yourhandle while your number stays private.

Registration still requires a phone number behind the scenes, so this is not anonymity. It is contact without disclosure, the same model that made handles the default on every other social network.

Reserve Your Brand Name Now

For a business, the practical urgency is simple: usernames are unique and first come, first served. The scramble looks exactly like every handle land-grab before it. If your brand name is available, reserve it before someone else does:

1. Update WhatsApp to the latest version.
2. Open your profile settings and look for the username option.
3. Pick your handle, ideally matching your Instagram and TikTok handles.
4. Confirm, and the reservation is held for your account.

If the rollout has not reached your country yet, check back after each update: waves are landing through the second half of 2026.

What Changes for Businesses on the API

This is the part most coverage skips, and it matters if WhatsApp is a sales channel for you.

When a customer adopts a username, businesses on the WhatsApp Business API stop seeing that customer's raw phone number. Instead they receive a business-scoped user ID (BSUID): a unique identifier delivered in the webhook user_id field. Two properties define it:

• Unique per user: no two users share a BSUID.
• Scoped to the business: the same customer has a different BSUID with every business portfolio, so identifiers cannot be cross-referenced between companies.

The transition has been staged since early 2026: BSUIDs started appearing in all webhook responses on March 31, 2026, and WhatsApp's Contact Book began automatically mapping existing phone-number relationships in April 2026. That auto-mapping is why existing customer relationships are protected: your opt-in list does not evaporate when customers adopt usernames.

What breaks without preparation: click-to-WhatsApp ad conversations and inbound messages from username-adopting users, on systems that never learned to read BSUIDs. Platforms handling this properly needed to update their webhook parsing, store the new identifier alongside profiles, and use the Request Contact Info flow for the rare cases where an actual phone number is required.

If you run your WhatsApp marketing through Kanal, this plumbing is the platform's job, not yours. Campaigns, abandoned cart recovery and the AI agent keep working whether a customer shows up as a phone number or a BSUID.

What This Changes for WhatsApp Marketing

Three practical consequences worth planning for:

1. A brandable identity. @yourbrand on WhatsApp becomes an asset like your Instagram handle: printable on packaging, clickable in bios, consistent across channels.
2. Lower friction to opt in. Customers reluctant to hand a store their phone number can start the relationship through a username instead. Expect opt-in flows to lean on this.
3. Identifier hygiene becomes invisible infrastructure. The platforms that adapted early will simply keep working; merchants gluing their own integrations together have webhook work to do.

Conclusion: Claim the Handle, Let the Plumbing Be Someone Else's Job

Usernames are the biggest identity change WhatsApp has shipped since the app launched: contact without phone numbers, handles as brand assets, and a quiet re-architecture of how businesses identify customers underneath. The to-do list for a merchant is short: reserve @yourbrand as soon as your country wave lands, keep your opt-in quality high, and run the channel on a platform that has already done the BSUID work. If that last part sounds like something you would rather not build yourself, book a Kanal demo.

Resources

• WhatsApp usernames business impact, 360dialog
• WhatsApp official update on usernames and business-scoped IDs, WABetaInfo
• How to reserve your WhatsApp username, Fast Company
• WhatsApp Business API guide
• Kanal on the Shopify App Store