If you run a Shopify store and use WhatsApp to reach customers, the platform you set up a year ago is not the platform you are using today. Meta has shipped more substantive changes to the WhatsApp Business Platform between January 2025 and May 2026 than in the previous three years combined. Some of those changes quietly raised the bills of merchants who never noticed. Others made entire categories of automation non-compliant overnight. One change blocked an entire country from receiving marketing messages.

This is the consolidated changelog. We have collected every confirmed change Meta has rolled out from January 2025 through April 2026, organised by what actually matters to a Shopify operator: how you get billed, what you are allowed to send, who you can talk to, and what infrastructure you are allowed to use. Each section explains what changed, when it took effect, what we know is true, and what to do about it.

If you read nothing else, read the sections on per-message pricing, the US marketing pause, and the AI chatbot ban. Those three changes alone have already cost merchants thousands of euros in unexpected fees and forced others to rebuild their automations from scratch.

1. Pricing moved from conversation-based to per-message on 1 July 2025

For three years, Meta charged businesses for WhatsApp interactions in 24-hour conversation windows. You opened a window with a business-initiated template and every message inside that window came at no additional cost. It was simple. It was forgiving. It is gone.

On 1 July 2025, Meta switched to per-message pricing for template messages on the WhatsApp Business Platform. You now pay for each delivered template message, with the rate determined by three things: the message category, the recipient country, and your volume tier. The 24-hour customer service window survives in one important place, but everything outside it is now metered per send.

The four categories under per-message pricing:

• Marketing templates are billed per delivered message regardless of any open conversation window.

• Utility templates are billed per delivered message when sent outside the 24-hour customer service window. Utility templates sent inside an open service window are free.

• Authentication templates are billed per delivered message.

• Service messages (free-form replies inside the 24-hour customer-initiated window) remain free worldwide.

For most Shopify merchants this is a meaningful cost increase. A welcome flow that fired three template messages used to cost one conversation. It now costs three messages. A reactivation campaign that nudged with a follow-up reminder used to be one billing event. It is now two.

What to do: audit every multi-step automation in your account and ask whether each follow-up template is still earning its keep at per-message rates. Some flows that made sense under conversation pricing no longer pay back. Others can be restructured so customer replies open the free service window, which makes utility messages inside that window free.

2. Marketing templates to US numbers were paused on 1 April 2025

This is one of the most significant operational changes of 2025 and one that few non-US merchants have heard about until they accidentally hit it.

On 1 April 2025, Meta paused the delivery of WhatsApp marketing template messages to phone numbers with the +1 country code. Marketing templates sent to US recipients fail with an error code. This applies regardless of where your business is located. If a Belgian or German merchant sends a marketing template to a US phone number, it does not deliver.

What still works for US numbers: utility templates, authentication templates, service replies inside the 24-hour customer service window, and Click-to-WhatsApp Ads. The pause is on marketing templates only.

Meta has framed this as temporary, citing a need to protect the user experience while WhatsApp grows in the US. As of April 2026 there is no announced end date for the pause.

What to do: if any portion of your audience has US phone numbers, your marketing strategy for those contacts has to be different. Use utility templates where the message qualifies. Use Click-to-WhatsApp Ads to bring users into a conversation that opens the service window. Use SMS or email as the marketing channel for the US segment until Meta lifts the pause.

3. On-Premises API was sunset on 23 October 2025

The On-Premises API, which let businesses host their own WhatsApp infrastructure, reached end of life on 23 October 2025. Meta no longer accepts new On-Premises integrations and the final supported version of the client expired. Cloud API, hosted entirely on Meta's servers, is the only path forward.

For most Shopify merchants this is a non-issue, because you almost certainly access WhatsApp through a Business Solution Provider (BSP) and have never touched the underlying infrastructure. But if your BSP is still routing through On-Premises behind the scenes, ask them when they migrated you. New features land on Cloud API first. Cloud API also offers throughput up to 1,000 messages per second, four times what On-Premises supported.

The practical signal: if a feature like WhatsApp Flows, Marketing Messages Lite API, or BSUID support is not yet available through your provider, the most likely cause is incomplete Cloud API migration on your account or platform.

4. General-purpose AI chatbots were banned on 15 January 2026

This is the change with the largest immediate operational impact, and most merchants we speak to still do not know it happened.

On 15 January 2026, Meta updated the WhatsApp Business Solution Terms to prohibit general-purpose AI chatbots on the WhatsApp Business Platform. ChatGPT-style assistants, Perplexity-style answer bots, and similar open-ended conversational agents are no longer allowed to operate on the platform. Companies including OpenAI and Perplexity announced their WhatsApp services would shut down before the deadline.

Important nuance: the policy applied to new business accounts from 15 October 2025, three months before the deadline for existing accounts. So the change has been in force for new merchants for over six months at this point.

The line Meta is drawing is between bots that perform a defined business function and bots that simply wrap a large language model. If your assistant can answer "what is the capital of Brazil," it is too general for WhatsApp. If your assistant can only answer questions about your store's products, orders, returns, and shipping, you are within policy.

This caught a lot of merchants out. Several apps in the Shopify App Store launched AI features in 2024 that simply pipe customer messages into ChatGPT. Those features are now non-compliant. If you have one running on your number, your account is at risk of throttling, template pauses, or suspension.

What to do: audit your AI assistant immediately. If it can answer questions outside your business domain, rebuild it as a task-bound agent or turn it off. The replacement pattern modern WhatsApp marketing platforms have adopted is a constrained agent with a fixed scope (products, inventory, orders, support topics) and explicit handoff to a human for anything outside that scope.

5. Marketing Messages Lite API and the surcharge on Cloud API marketing

To improve marketing deliverability and reduce spam, Meta launched the Marketing Messages Lite API (often abbreviated MM Lite) as a dedicated endpoint for promotional sends. It uses the same templates and message formats as Cloud API but optimises delivery, offers performance benchmarks against similar templates, and supports time-to-live (TTL) on short-run campaigns.

The cost relevance: starting 1 January 2026, Meta added a surcharge on marketing messages sent through the standard Cloud API endpoint instead of through MM Lite. The published surcharge is plus 6 to 7 percent depending on the partner implementation, applied to every marketing message that does not route through MM Lite.

Worth knowing: in India, Meta reported up to 9 percent higher delivery rates on MM Lite compared to standard Cloud API across a 12 million message A/B test in January 2025. So MM Lite is both cheaper and delivers slightly better in major markets.

What to do: ask your BSP whether your account routes marketing messages through MM Lite or through the standard Cloud API. If the answer is no or "we are working on it," you are paying the surcharge on every marketing message and getting slightly worse delivery on top. Push for a migration date.

6. Authentication rates went lower in seven more markets on 1 February 2025

A smaller change but relevant for any merchant sending OTPs at scale. On 1 February 2025, Meta expanded its lower "authentication-international" rates to seven new markets: Egypt, Malaysia, Nigeria, Pakistan, Saudi Arabia, South Africa, and the UAE. India and Indonesia already had these rates from earlier rollouts.

For Shopify stores using WhatsApp for OTP delivery in these markets, the per-message authentication cost dropped meaningfully. WhatsApp authentication is now substantially cheaper than SMS in most of these regions, often by 60 to 80 percent at scale.

7. Service conversations have been free since 1 November 2024

Less of a 2025-2026 change and more of a baseline worth restating: since 1 November 2024, all service conversations are free for all businesses globally. A service conversation is what opens when a customer messages your business first. For 24 hours from the customer's most recent message, you can send free-form replies and (since July 2025) free utility templates back at no per-message cost.

This is the most underused cost-saving lever in the WhatsApp ecosystem. Brands that engineer flows to trigger customer replies (and therefore open service windows) can reduce messaging cost on follow-up sends to zero.

8. WhatsApp usernames and BSUID are arriving in 2026

This is the change you need to prepare for now, even though it does not fully affect end users until later this year.

WhatsApp is rolling out usernames, a privacy feature that lets users send messages without exposing their phone number. The timeline as Meta has communicated it:

• 31 March 2026: BSUIDs (Business-Scoped User IDs) start appearing in production webhooks. Webhooks include a new user_id field with the BSUID, regardless of whether the user has adopted a username.

• Early April 2026: Meta-hosted contact book feature launches. Automatically stores phone-number and BSUID pairs from interactions.

• Early May 2026: REQUEST_CONTACT_INFO button becomes available, letting businesses ask users to share phone numbers explicitly.

• May 2026: Send-to-BSUID API support becomes available. You can message users using BSUID without knowing the phone number.

• June 2026: Country-level testing of usernames begins in select markets.

• Rest of 2026: Global rollout of usernames to all WhatsApp users.

The Business-Scoped User ID is a unique identifier per business per user. The same person messaging two different businesses has two different BSUIDs. The format is {ISO country code}.{up to 128 alphanumeric characters}, e.g. US.13491208655302741918.

Phone numbers do not vanish. Phone numbers continue to be returned for users who have not adopted usernames, for users in your contact book, and for users you have interacted with in the past 30 days. The BSUID becomes the durable identifier for username adopters and for any new contacts from CTWA who have not shared a phone number.

What to do: if your CRM or your Shopify integration keys customer records solely on phone number, you have a problem incoming. Update your data model to store BSUID alongside phone number.

9. Click-to-WhatsApp Ads and the 72-hour free entry-point window

Click-to-WhatsApp Ads (CTWA) are not new, but their economic importance grew through 2025 because of one specific mechanic: when a user clicks a CTWA from Facebook or Instagram, a 72-hour free entry-point window opens. During that window, all messages between you and that user (including marketing templates) are free.

That is three times longer than the standard 24-hour service window and structurally changes the unit economics of paid acquisition. A multi-step qualification, recommendation, and conversion sequence inside the 72-hour window costs zero in per-message charges on top of the ad spend.

In one published European retail case, Takko Fashion's Italian launch with QR-code WhatsApp opt-ins at checkout achieved 36.8x ROAS, 9,000 new subscribers per month, 92 percent open rates, and 15 percent average click-through rates. CTWA-driven flows commonly fall in the 30x to 60x ROAS range for established brands, with outliers above 100x.

CTWA is not available in all markets. In some regions including Russia, the 72-hour entry-point window does not apply because of advertising platform restrictions.

10. What to do this quarter

If you only act on the changes covered above in the next three months, prioritise these:

First, audit your messaging cost. Pull the past 90 days of WhatsApp invoices, count templates by category, and check whether your BSP is using MM Lite for marketing. The 6 to 7 percent surcharge alone is often worth a meeting with your provider. Per-message pricing changes the unit economics of any flow with more than two outbound messages.

Second, audit your AI assistant. If anything on your number can answer open-ended questions, it is now non-compliant. Rebuild it as a task-bound agent or take it offline.

Third, prepare for BSUID. Add a BSUID field to your Shopify customer record now, before March 31 webhook changes start rolling. If your provider cannot expose user_id in webhooks, ask when they will.

Fourth, check your US marketing exposure. If any meaningful share of your subscribers have +1 numbers, your marketing campaign reach is silently lower than your dashboard suggests.

Fifth, ask your BSP about Click-to-WhatsApp Ads support. The 72-hour free window is a structural cost advantage that most brands are not yet using.

Frequently asked questions

Is the WhatsApp Business App the same as the WhatsApp Business API?

No. The WhatsApp Business App is a free mobile application designed for single-operator small businesses. It does not support automation, broadcasts above 256 contacts, or third-party integrations. The WhatsApp Business API (officially the WhatsApp Business Platform) is the enterprise interface accessed through a Business Solution Provider, with full automation, scaling, and integration capabilities.

Do I have to migrate to Cloud API?

For new integrations, yes. On-Premises API reached end of life on 23 October 2025. If you already use a BSP, the migration is their problem, not yours, and most have completed it. If you are still on a self-hosted On-Premises setup, you stopped being able to send and receive messages on 23 October 2025.

How much does the per-message pricing change cost me?

It depends on your flow design. A merchant running single-message broadcasts at the same volume will see no change. A merchant running multi-step automations will typically see a 30 to 60 percent cost increase unless the flows are restructured to use the free 24-hour service window.

When do WhatsApp usernames go live?

BSUIDs start appearing in webhooks on 31 March 2026. Country-level testing of usernames begins in June 2026. Global rollout continues through the rest of 2026.

What kind of AI is still allowed on the WhatsApp Business API in 2026?

Task-bound automation is still allowed: order tracking, support flows, FAQ bots with predictable outputs, booking and appointment bots, recommendation engines scoped to your catalog. General-purpose conversational AI is prohibited under the policy effective 15 January 2026.

What happens if I send a marketing template to a US number after April 2025?

It fails delivery with a specific error code (Twilio reports it as 63049, similar codes apply across other BSPs). The message is not sent and is not billed.

What is a Quality Rating and how do I protect mine?

Your Quality Rating is Meta's measure of how customers respond to your messages. High block rates, high "report spam" rates, or low engagement drag it down. A red Quality Rating throttles your sending and can lead to template pauses or account restrictions.