Trusted by global B2C brands
USE CASEs
AI on WhatsApp, built for marketing, sales, and support
WhatsApp mass broadcast
Reach tens of thousands of customers in one go, with messages personalized by name, purchase history, or interest.
WhatsApp shared inbox
Give every agent their own login, route chats to the right person, and keep a clean handover trail across agents.
WhatsApp CRM integrations
Sync Salesforce, HubSpot, or Shopify records into every chat and automatically trigger messages when statuses change.
WhatsApp Flow
Collect leads, take bookings, and run intake questionnaires directly in chat — no website redirects needed.
WhatsApp drip marketing
Automate welcome, re-engagement, and post-purchase journeys triggered by clicks, replies, or time delays.
WhatsApp payment
Let customers scroll your products, build a cart, and check out with a secure Stripe payment link without leaving the chat.
Comparison
WhatsApp Business App or API: which one fits?
The free app works for solo operators and small shops. The API is built for teams ready to scale marketing, sales, and support.
 WhatsApp Business App |  WhatsApp Business API | |
|---|---|---|
| Users per number | **1 phone, up to 4 linked devices** | **Unlimited team members with individual logins** |
| Broadcast reach | 256 contacts per list | 1,000 - 100,00 contact per campaign |
| AI agents & chatbots | ❌ | ✅ |
| CRM & e-commerce integrations | ❌ |   |
| Interactive messages | ❌ | Carousels, CTA buttons, list menus, WhatsApp Flows |
| In-chat payments | Manual | Catalog browsing and secure checkout |
| Analytics | Sent, delivery and read rates | Response time, resolution rate, hot topics, CSAT |
| Team inbox | ❌ | Shared inbox with assignment and oversight |
| Blue tick verification | Pay for Meta Verified subcription | Notable brands can apply for OBA for free |
Create your SleekFlow account
Sign up for free in seconds. No credit card needed, and you can start exploring the platform with a test number right away.
Connect a WhatsApp API number
Add a new number for US$15. Keep using your existing WhatsApp Business App on the same number with Coexistence mode. Your contacts and chat history stay intact.
Get your business verified, fast
As a Meta Select Tier Partner, we fast-track your business verification so you can unlock higher messaging limits and start reaching thousands of customers within days.
Customer Highlights
SleekFlow customer success stories
Frequently Asked Questions
What is WhatsApp Business API?
The WhatsApp Business Platform (a.k.a. WhatsApp Business API solution) gives medium to large businesses the ability to connect with customers at scale, offering advanced features like automated messaging, chatbots, interactive messages, and seamless integration with business systems.
How do I apply for the WhatsApp Business API with SleekFlow?
To apply for the WhatsApp Business API through SleekFlow, you must be an admin of your Meta Business account and have enabled two-factor authentication on your Facebook personal account for security. Please also prepare business registration documents or bank/service bills that confirm your company details during the sign-up process.
How can I get the WhatsApp blue tick verified badge?
A blue tick verified badge on WhatsApp indicates that Meta has verified the business based on its activity and the documents provided. The blue tick signifies that the business is official, enhancing its brand image and reducing the risk of fraud. To qualify, businesses must:
a. Have a verified Business Manager with a display name aligned with the client’s branding (it cannot belong to another company).
b. Maintain a ‘high’ quality rating for the number when applying.
c. Adhere to WhatsApp's policies, particularly the Commerce Policy.
d. Have a verified Facebook Business Manager.
e. Be a notable and reputed brand as determined by WhatsApp, such as having a high-quality business website, sufficient media exposure (as determined by WhatsApp), and completing the Business Verification process.
Is WhatsApp Business API free?
No, the WhatsApp Business API is not free. Unlike the WhatsApp Business App, which is free, the API has per-template-message pricing that varies by country. However, SleekFlow offers competitive pricing as a WhatsApp Business Solution Provider (BSP), often providing the best rates in the market.
How much does it cost to send a WhatsApp message to customers in Singapore?
Meta charges per conversation, not per message, and the rate depends on the category. For Singapore, marketing conversations cost S$0.0937, while utility and authentication are S$0.0205 each. Service messages are free until 30 September 2026. Use the calculator above to estimate your exact monthly spend based on your message mix.
Are WhatsApp Business API fees charged in SGD or USD?
SleekFlow bills Singapore customers in Singapore dollars, so you're charged in your local currency with no manual conversion or surprise foreign-exchange fees. Your rates and invoices are all in SGD, making it easy to budget and reconcile. You always know exactly what you're paying, with no USD-to-SGD guesswork on your monthly bill.
Is GST included in SleekFlow's WhatsApp pricing?
Yes. SleekFlow's Singapore pricing is inclusive of GST, so the price you see is the price you pay, with no tax added at checkout. Your invoice itemises the GST portion for your records, making it straightforward to claim as input tax if your business is GST-registered.
What's changing in WhatsApp pricing from 1 October 2026?
From 1 October 2026, Meta makes all non-template messages billable. Service messages (free-form replies inside the 24-hour customer window) and in-window utility templates will be charged per message. Both were previously free — service since November 2024, in-window utility since July 2025. Service messages are billed at Singapore's utility rate, with no volume discounts.
Which WhatsApp messages are free?
Until 30 September 2026, service replies inside the 24-hour customer window are free. From 1 October 2026, all non-template messages become billable. What stays free: any message sent inside the 72-hour free-entry-point window, which opens when a customer starts the chat from a Click-to-WhatsApp ad or a Facebook or Instagram CTA button. That window is unchanged.
How can I lower my WhatsApp messaging costs in Singapore?
Prioritise free entry points — drive conversations from Click-to-WhatsApp ads or Facebook Page CTAs to keep the 72-hour free window across all message categories. Since service messages get no volume discounts after October 2026, route high-volume transactional updates through utility templates, which do offer volume tiers. Automating replies also reduces your total message count.