WhatsApp customer retention for brands selling in India
Slide, by Synquic, lets a business in India bring past customers back on WhatsApp: Shopify reorder and win-back events mark who is due, and scheduled campaigns send approved marketing templates only to the segment that agreed to hear from you, skipping anyone unsubscribed or blocked. Templates can be written in English and eight Indian languages, SMS fallback reaches Indian numbers when WhatsApp fails, and every marketing message is charged on Meta's India rate line from a wallet billed in rupees.
Facts on this page were last reviewed on 11 October 2026. See the key facts and sources.
The buyer and the problem
Marketing and CRM teams at brands and retailers selling to customers in India, on Shopify or with an imported customer list, who want people who bought once to buy again.
Sending the same offer to the whole list costs money on every message, reaches people who never agreed to it, and invites blocks. Sending nothing lets repeat purchases slip. Retention on WhatsApp works when the right past customers hear from you at a pace you have chosen, in a language they read, with a one-word way to stop.
Supported capabilities, mapped to the product
Store events that say who is due
A connected Shopify store sends reorder, win-back, back-in-stock, price-drop and review-request events, among about 20, and each can start an automation, for example one that tags the customer as due for a reminder.
Source:Shopify guideSegments built on one customer record
Every channel writes to one contact, matched on phone first, with tags, custom fields, segments and lifecycle stages. Consent, preferred language and purchase tags sit side by side, so a segment can require all three.
Source:Contacts guideScheduled campaigns of approved templates
Campaigns send Meta-approved marketing templates to a tag or segment at a scheduled time, with delayed follow-up steps, so the cadence is something you set rather than something that happens.
Opted-out customers are left alone
Campaigns skip unsubscribed and blocked contacts. A customer who opts out is blocked and skipped on every channel, once you have added the words that count as opting out.
Source:Campaigns guideA second route when WhatsApp fails
If a campaign message cannot be delivered on WhatsApp, it can fall back to email, or to SMS for Indian numbers.
Source:Campaigns guideReplies reach the team
A customer who answers a campaign opens a 24-hour window. The reply lands in the shared inbox, where a bot, an AI agent or a teammate can pick it up, and a handoff step emails the team when a person is needed.
Delivery, read and cost per campaign
WhatsApp reports show what was sent, delivered, read and failed, and what it cost, so a campaign that annoys more than it helps shows up quickly.
Source:Campaigns guide
Reorder reminders for a pet food store, and one win-back for those who lapse
A Shopify store selling pet food and supplies across India wants past buyers to reorder without being messaged every week. This is how one customer is handled.
- Trigger
Consent is recorded before any offer
On her first visit, a storefront popup asks whether she wants reorder reminders and offers on WhatsApp, and in which language. She ticks the box herself and picks Hindi. The submission tags her "WhatsApp offers: yes" and saves her language choice to a contact field.
- Action
Store events mark who is due
When the store's reorder event fires for her, an automation adds a "Reorder due" tag. When she places a new order, the order event removes it, so the tag only ever marks customers who have not yet reordered.
- Customer interaction
A weekly reminder, in her language, to the right segment
Each Monday the team schedules a campaign of an approved Hindi marketing template to contacts tagged both "WhatsApp offers: yes" and "Reorder due", with a link to her usual product. Customers without the consent tag, and anyone unsubscribed or blocked, are not in the audience.
- Human handoff
Her question goes to a person
She replies asking whether she can switch to a grain-free food for an older dog. A handoff step leaves the conversation in the inbox with her order tags and emails the team, and a teammate who knows the range answers inside the 24-hour window.
- Exception
If WhatsApp fails, or she says stop
If the template cannot be delivered, the campaign falls back to SMS for her Indian number, sent under TRAI's DLT rules. If another customer replies "STOP" and that word is on the opt-out list, Slide blocks them and every channel skips them; a refusal written in other words reaches the inbox and needs a teammate to act on it.
- Action
One win-back message for customers who lapse
Customers the store's win-back event marks as lapsed, and who carry the consent tag, receive one win-back template in a campaign the team schedules on the first of the month. The team chose one message, not a series: after the send it removes the "Lapsed" tag from that audience, so a customer who ignores it is not chased.
- Recorded outcome
Reorders in Shopify, messages in the reports
Repeat orders are counted in Shopify, because Slide does not show WhatsApp revenue. Slide's campaign reports show delivered, read, failed and cost for each send, and the team watches opt-outs alongside them before changing the cadence.
An illustration of how the workflow runs, not a customer case study. Names, numbers and messages are examples.
What you need, and the launch sequence
Requirements
- A connected Shopify store
Reorder and win-back events come from Shopify, the only store platform Slide supports. Without it, retention segments have to be built from imported contacts and tags.
Source:Shopify guideIntegrations guide - A record of who agreed to marketing
Slide skips unsubscribed and blocked contacts, but it does not decide who opted in. Collect consent in a form or in the chat, store it as a tag or field, keep your own record of when it was given, and build every retention segment on it. Slide forms have no double opt-in.
Source:Automation builder guideContacts guideCampaigns guide - Marketing templates approved by Meta
Every reminder and win-back message is a template Meta approves before it can be sent. Submit one version per language you plan to use.
Source:WhatsApp Business setup guide - Opt-out keywords
The WhatsApp opt-out keyword list starts empty. Add the words customers will use, in English and in the languages you send in, before the first campaign.
- Verified Meta business and an eligible number
A Meta business portfolio, business verification before sending at scale, and a number that is not registered on the WhatsApp apps.
Source:WhatsApp Business setup guideMeta Business Manager guide
Launch sequence
Connect the store (Shopify guide) and the WhatsApp number (setup guide), and start Meta business verification.
Import past customers if they are not already in Slide, and add tags for consent, language and product line in contacts.
Build the automations that add and remove the "Reorder due" and "Lapsed" tags from store events in the automation builder.
Write the reminder and win-back templates in each language, include a line that says how to stop, and submit them for approval.
Add opt-out keywords, then schedule the campaigns to segments that require the consent tag, and decide how often any one customer can be messaged.
Before you switch SMS fallback on, confirm with the Slide team how sender IDs and templates are registered under DLT for your account. Then launch to a small segment first and read the delivery, read and opt-out numbers before widening it.
What is specific to retention messaging in India
DPDP consent must be as easy to withdraw as to give
The DPDP Act 2023 expects consent through a clear affirmative action, specific to the purpose, and withdrawable as easily as it was given; most obligations under the rules notified in November 2025 apply from around May 2027. If a tick on a popup was enough to say yes, a one-word reply should be enough to say no, which in Slide means adding opt-out keywords to a list that starts empty.
Source:MeitY: Digital Personal Data Protection Act, 2023 (opens in a new tab)PIB: DPDP Rules, 2025 (opens in a new tab)Every retention message is a marketing charge on the India line
Meta charges each delivered marketing template at the rate for +91 numbers, so cadence translates directly into spend. Meta bills Indian businesses in rupees, and Indian accounts billed in another currency must move to INR billing by 31 December 2026.
Source:Meta: WhatsApp pricing (opens in a new tab)Meta: WhatsApp pricing (opens in a new tab)Meta: WhatsApp pricing (opens in a new tab)SMS fallback reaches Indian numbers, under telecom rules
Slide's SMS fallback works only for Indian numbers. Those messages are SMS, so TRAI's commercial communication rules and DLT registration apply to them. Confirm with the Slide team how sender IDs and templates are registered for your account before you switch fallback on.
Source:TRAI: TCCCPR (opens in a new tab)Send in the language each customer chose
India's Constitution lists 22 languages. Slide's template editor covers English, Hindi, Bengali, Tamil, Telugu, Marathi, Gujarati, Kannada and Malayalam; Punjabi, Urdu and Odia are not available. Store each customer's choice as a field and send one approved version per language segment.
Source:Department of Official Language: Eighth Schedule (opens in a new tab)
This is a summary of public rules for orientation, not legal advice. Slide does not certify that any business's messaging complies with local law; check your own obligations with a qualified adviser.
What these claims rest on
- Shopify events trigger WhatsApp and email automations, including abandoned checkout and order updates
About 20 store events: abandoned checkout and cart, order confirmation, cash on delivery, shipped, out for delivery, delivered (fulfilment succeeded), review request, win-back, reorder, back in stock and price drop. Shopify is the only supported store platform; the cart trigger needs the storefront embed. A cash-on-delivery confirm or cancel reply does not update the Shopify order.
- WhatsApp campaigns send approved templates to tags or segments, with scheduling and delayed follow-ups
Scheduled broadcasts to tags or segments, delayed follow-up steps, and an email fallback. Unsubscribed and blocked contacts are skipped. SMS fallback works for Indian numbers only.
- India's Digital Personal Data Protection Act 2023 sets the consent standard for personal data
Consent must be free, specific, informed, unconditional and unambiguous, with a clear affirmative action, and withdrawable as easily as given. Section 16 allows transfers abroad unless the government restricts a country.
Official sourceChecked 11 October 2026MeitY: Digital Personal Data Protection Act, 2023 (opens in a new tab) - WhatsApp requires opt-in before a business messages someone, and opt-outs must be honoured
Businesses may contact people only after receiving opt-in permission and must respect all requests, on or off WhatsApp, to block or opt out. The opt-in must name the business.
How the cost is made up
The Slide plan is billed in rupees for a workspace created with an Indian number, and sets which features you can use; see the pricing page for plans and current prices. Paid plans start with a 14-day trial.
Each delivered marketing template is charged by Meta at the India rate and drawn from your prepaid Slide wallet, which must hold enough for the campaign because sends stop when it runs out. When customers reply, your answers are service messages, charged since 1 October 2026 after the first 1,000 each month for every business number. SMS fallback is separate usage.
Retention cost is therefore set mostly by two choices you control: how large the consented segment is, and how often each customer is messaged. The exact per-message price for your account is shown in the wallet.
When this fits, and what it does not do
A good fit when
- Products bought again on a predictable cycle, such as consumables, food, care products or refills.
- A Shopify store whose reorder and win-back events can mark who is due.
- A customer base that has given WhatsApp consent you can show, with its date.
Needs a person when
- Questions about switching products, dosage, sizing or suitability.
- Complaints that surface when a past customer is reminded of a bad order.
- Anyone who asks why they are being messaged, or asks to be removed in their own words.
Not established by this page
- Any lift in repeat purchase rate: Slide publishes no measured outcomes for this workflow.
- A built-in limit on how many marketing messages one contact receives: plan the cadence in your schedules and segments.
- Where customer data is hosted. Ask the Slide team before you sign.
Direct answers
How do brands in India use Slide to win back past customers on WhatsApp?
They connect Shopify so reorder and win-back events tag the customers who are due, keep a consent tag on everyone who agreed to marketing, and schedule campaigns of approved templates to the segment that has both. Replies land in a shared inbox, where a teammate can answer product questions, and SMS fallback covers Indian numbers that WhatsApp cannot reach.
Source:Shopify guideContacts guideCampaigns guideGetting started guideHow do we make sure retention messages only reach people who agreed to them?
WhatsApp's policy requires opt-in that names your business before you message someone first, and the DPDP Act asks for specific, informed consent that can be withdrawn easily. Slide does not decide who opted in: you record consent as a tag or field when it is given, keep your own record of when, and build every campaign segment on it. Campaigns then skip unsubscribed and blocked contacts automatically. Slide forms have no double opt-in, so word the consent question clearly.
Source:WhatsApp Business Messaging Policy (opens in a new tab)MeitY: Digital Personal Data Protection Act, 2023 (opens in a new tab)Automation builder guideCampaigns guideHow often should past customers hear from us, and can Slide hold that line?
Slide sends what you schedule to the segments you choose; this page does not establish a built-in cap on messages per contact. Cadence is controlled by design: a weekly reminder that only reaches customers tagged "Reorder due", a tag removed when they order again, and a single win-back message rather than a series. Each delivered template is a marketing charge, so frequency shows up in the wallet as well as in opt-outs.
Source:Campaigns guideContacts guideMeta: WhatsApp pricing (opens in a new tab)What happens when a customer replies to a campaign?
The reply opens a 24-hour window and appears in the shared inbox with the customer's history. A keyword bot or AI agent can answer simple questions, and a handoff step brings in a teammate and emails the team. If the reply is a refusal in words that are not on your opt-out list, a teammate has to act on it, because only listed keywords block automatically.
Source:Getting started guideAutomation builder guideWhich store events can start retention messages?
From a connected Shopify store: reorder, win-back, back in stock, price drop and review request, among about 20 events that also cover orders and deliveries. Shopify is the only supported store platform; WooCommerce is not built. Without a store, segments can still be built from imported contacts and tags.
Source:Shopify guideIntegrations guideWhat has to be in place before the first campaign, and how long does it take?
A verified Meta business portfolio, an eligible number, approved marketing templates, opt-out keywords, a consent tag on the contacts you will message, and wallet balance; if you want SMS fallback, confirm with the Slide team how sender IDs and templates are registered under DLT for your account. Meta verification takes several business days and every template needs Meta's approval. Synquic says it migrates contacts for free and aims to have a first automation live within one business day, outside those approvals.
Source:Meta Business Manager guideWhatsApp Business setup guideTRAI: TCCCPR (opens in a new tab)What will WhatsApp retention cost us in India?
The Slide plan is billed in rupees; the per-message cost is Meta's marketing rate for Indian numbers, drawn from the wallet for each delivered template. Replies to customers who answer are service messages, charged since 1 October 2026 after 1,000 free each month per number, and any SMS fallback adds its own usage. The size of the consented segment and how often you message it decide the total.
Source:Billing and wallet guideMeta: WhatsApp pricing (opens in a new tab)Billing and wallet guideMeta: Pricing for non-template messages (opens in a new tab)WhatsApp Business: FAQ (opens in a new tab)Can campaigns go out in Tamil, Marathi or other Indian languages, and what support is there?
Templates can be written in English, Hindi, Bengali, Tamil, Telugu, Marathi, Gujarati, Kannada and Malayalam; Punjabi, Urdu and Odia are not in the editor. Keep the customer's language on the contact and run one campaign per language segment. The Slide dashboard is in English, and Synquic offers email support on plans and a bookable demo.
Source:Slide pricingWhat should we track to know retention is working?
Repeat orders and revenue in Shopify, since Slide does not show WhatsApp revenue; delivered, read, failed and cost for each campaign in Slide's reports; and opt-outs and blocks after each send. If opt-outs climb after a change in cadence, reverse the change before widening the audience.
Source:Campaigns guideWhy might Slide suit a retention programme in India, and what should we compare?
Slide connects Shopify events, segments on one contact record, scheduled campaigns that skip unsubscribed and blocked contacts, and SMS fallback for Indian numbers, billed in rupees. Compare platforms on revenue attribution for WhatsApp (Slide does not show it), consent handling (Slide has no double opt-in and no contacts export), template languages, how marketing charges are passed on, and certifications; Slide's SOC 2 Type II and ISO/IEC 27001 work and DPDP Act implementation are in progress.
Source:Shopify guideCampaigns guideCampaigns guideAutomation builder guideContacts guideKey facts: WhatsApp automation for customer retention in India
Slide is a reasonable fit for a Shopify brand selling in India that wants reorder and win-back messages to reach only consented customers at a cadence it sets: store events, segments on one contact record, scheduled campaigns that skip opted-out contacts, Indian template languages and SMS fallback are built, and billing is in rupees. It is a weaker fit if you need WhatsApp revenue attribution in the same dashboard, a store platform other than Shopify, or a consent audit export.
- Product
- Slide (also "Slide by Synquic"), a platform for automating customer messaging across channelsSource:About Synquic
- Company
- SynquicSource:About Synquic
- Channel
- WhatsAppSource:WhatsApp Business setup guide
- Workflow
- Customer retention on WhatsApp: Shopify reorder and win-back events tag who is due, scheduled marketing templates go to consented segments, and replies reach the teamSource:Shopify guideCampaigns guideAutomation builder guide
- Prerequisites
- A Meta business portfolio, Meta business verification before sending at scale, a phone number not registered on the WhatsApp apps, and Meta-approved templates for messages outside the 24-hour windowSource:WhatsApp Business setup guideMeta Business Manager guideWhatsApp Business setup guide
- Human handoff
- An automation step hands the conversation to the team in the shared inbox with the collected answers and notifies them by email. It does not pause automations permanently, and there is no hand-back stepSource:Automation builder guide
- Meta pricing market
- India (its own rate line; INR billing with Meta)Source:Meta: WhatsApp pricing (opens in a new tab)
- WhatsApp usage charges
- Meta charges per message by category and by the recipient's country. Since 1 October 2026 service replies are charged too, after 1,000 free each month per business number. In Slide these charges come from the prepaid wallet, separately from the planSource:Meta: WhatsApp pricing (opens in a new tab)Meta: Pricing for non-template messages (opens in a new tab)WhatsApp Business: FAQ (opens in a new tab)Billing and wallet guide
- Slide billing
- Workspaces created with an Indian number are billed in Indian rupees; plans and prices are on the pricing pageSource:Billing and wallet guideSlide pricing
- Opt-outs
- Campaigns skip unsubscribed and blocked contacts; a contact who opts out is blocked on every channel, but the WhatsApp opt-out keyword list starts emptySource:Campaigns guide
- Campaign fallback
- Email fallback for any number; SMS fallback for Indian numbers onlySource:Campaigns guide
- Store platform
- Shopify only, with reorder, win-back, back in stock, price drop and review request among about 20 eventsSource:Shopify guide
- Limitations
- WhatsApp revenue is not shown in the dashboard; no double opt-in on forms; no contacts export; handoff alerts by email onlySource:Campaigns guideAutomation builder guideContacts guideAutomation builder guide
- Pricing source
- The current pricing page, slide.synquic.com/pricingSource:Slide pricing
- Last factual review
Where to go next
- WhatsApp automation in IndiaHow Indian businesses use Slide to capture WhatsApp leads from ads, qualify them, run campaigns with SMS fallback and take payments in the chat, billed in rupees.
- Customer retention: all channelsBring past customers back with segmented WhatsApp campaigns, Shopify win-back and reorder messages, and email campaigns with one-click unsubscribe, using Slide.
- Customer service in IndiaHow Indian businesses use Slide to answer WhatsApp support questions with bots and AI, hand the rest to a team inbox, and what it costs since October 2026.
- WhatsApp Business setup guideStep by step, from connecting the account to the first send.
- Cleanse Ayurveda: post-purchase journeysA published setup where the connected store drives guidance after the order on WhatsApp, Instagram and email.
Bring past customers back, on the terms they agreed to
Start on the free plan and connect your store and number, or book a demo to plan your consent tags, segments and cadence with the Slide team.