Bring customers back with timely reminders and offers. On autopilot.
Promotional campaigns, reorder reminders, post-purchase support and win-back flows: Slide automates customer retention on WhatsApp and email.
From connected channel to live automation.
Segment your customers
Tag contacts by purchase history, engagement level, or custom attributes and target retention campaigns precisely.
Set up automated retention flows
Schedule campaigns to a segment, and build renewal reminders and re-engagement flows in the visual builder.
Conversations happen automatically
Messages are sent at the right time, personalised with customer data, and look like 1:1 conversations.
Track retention performance
See delivery and read rates for WhatsApp campaigns, opens and clicks for email, and Shopify revenue for email campaigns.
Retention that works while you sleep.
Promotional Broadcasts
WhatsAppSend segmented WhatsApp campaigns of approved templates to opted-in contacts: flash sales, seasonal campaigns and offers.
Segment: 'Customers who bought in Q4' → Message: 'Your exclusive offer is live for 24h 🎉'.
Renewal & Reorder Reminders
WhatsAppRemind customers when a consumable is due for reorder, from your Shopify store's reorder events or a scheduled campaign.
Reorder due → WhatsApp: 'Running low? Reorder in one tap 👇'.
Post-Purchase Support Flows
WhatsAppOnboard new customers and answer setup questions in structured WhatsApp conversations.
Order delivered → Day 1: Unboxing guide → Day 3: 'Any questions?' → Day 7: Tips for getting the most out of [product].
Re-Engagement Campaigns
WhatsAppWin back customers who have not ordered in a while, from your Shopify store's win-back events or a segment you define.
Win-back event from your store → 'We miss you! Here's 15% off your next order 💛'.
What powers retain customers.
Contact Segmentation
Tag and filter contacts by purchase history, lifecycle stage, or any custom attribute.
Broadcast Campaigns
Send targeted campaigns to opted-in segments on WhatsApp and email.
Automated Sequences
Timed drip sequences for onboarding, renewal, and re-engagement runs 24/7.
Retention Analytics
Delivery, read, open and click rates per campaign, with Shopify revenue for email campaigns.
Used across many industries.
The same channels and builder adapt to each sector's own workflows. Explore how your industry benefits.
Bring past customers back with messages they agreed to receive
Slide, by Synquic, brings past customers back with segmented WhatsApp campaigns of approved templates, Shopify win-back and reorder messages, and email campaigns with one-click unsubscribe and automatic suppression of hard bounces and complaints. WhatsApp templates are charged per message by category and the customer's country. Instagram cannot re-engage anyone, because Slide sends no Instagram message more than 24 hours after the person's last one.
Customer retention by channel and market
- WhatsApp in IndiaHow Indian brands use Slide for WhatsApp reorder reminders and win-back campaigns to past customers, with consent, opt-outs and India-only SMS fallback.
- Email in CanadaWin-back and reorder emails to past customers in Canada with Slide, built around CASL's 2-year implied consent from a purchase and express consent after.
What these claims rest on
- 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.
- Email campaigns support segments, A/B tests, open and click tracking, one-click unsubscribe and bounce suppression
A/B tests on subject, content, sender name or preview text; one-click unsubscribe; hard bounces and complaints are suppressed. Soft bounces are not suppressed and there is no list cleaning.
- 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.
- Cleanse Ayurveda runs post-purchase journeys after the order
Published setup: 4 automations live; the store connected so post-purchase guidance runs on WhatsApp, Instagram and email.
- Mirza International runs WhatsApp, Instagram, email and voice on one contact record
Published setup: 18 automations live across six channels; contacts matched on phone first, then email; flows reused across channels.
How the cost is made up
The Slide plan decides which features you have; plans and current prices are on the pricing page, and paid plans start with a 14-day trial. Workspaces created with an Indian number are billed in rupees, and all others in US dollars.
Each WhatsApp campaign message is a template, charged per delivered message by Meta at the rate for the category Meta approved it under and the customer's country; a retention offer approved as a marketing template is charged at the marketing rate. Slide draws these charges from your prepaid wallet, separately from the plan, and stops sending when the wallet is empty.
Email campaigns draw on the plan's email credits. The exact per-message WhatsApp price for your account is shown in the wallet.
When this fits, and what it does not do
A good fit when
- Past customers who opted in to WhatsApp messages or email from your business.
- A Shopify store with repeat purchases, where reorder and win-back events apply.
- Groups of customers you can define from tags, contact fields and lifecycle stages.
Needs a person when
- A past customer who replies with a complaint or a refund request.
- High-value customers who expect a personal message.
- Anyone who wants to stop one kind of message but keep another, since an opt-out blocks the contact on every channel.
Not established by this page
- Any change in repeat purchases or churn: Slide publishes no measured outcomes for retention.
- Whether a given retention message will be approved as a utility or a marketing template: Meta decides when it reviews it.
- Where customer data is hosted. Ask the Slide team before you sign.
Direct answers
How does Slide win back past customers?
Group them by tags, contact fields and lifecycle stage, then send a scheduled WhatsApp campaign of approved templates, with delayed follow-up steps, or an email campaign to a segment. For Shopify stores, win-back, reorder, back-in-stock and price-drop events start messages from store activity without anyone scheduling them. Unsubscribed and blocked contacts are skipped.
Source:Contacts guideCampaigns guideCampaigns guideShopify guideWhat consent do we need for retention messages?
WhatsApp requires the customer's opt-in, naming your business, before you message them first, and every opt-out must be honoured. Beyond that, each country's law sets the rules and they differ: South Africa, for example, allows marketing similar products to existing customers who could object at collection and in every message, while Qatar requires prior consent for electronic direct marketing. Check the rules for your market under locations.
Source:WhatsApp Business Messaging Policy (opens in a new tab)Information Regulator: Guidance note on direct marketing (opens in a new tab)NCSA: Electronic communications for direct marketing guideline (opens in a new tab)How do unsubscribes and opt-outs work?
Email campaigns carry one-click unsubscribe and suppress hard bounces and complaints; soft bounces are not suppressed, and there is no list cleaning. On WhatsApp, Slide blocks a contact who opts out and skips them on every channel, but the opt-out keyword list starts empty, so add your keywords before the first campaign. Email sent by an automation step adds no unsubscribe and does not check those lists, so retention email belongs in campaigns or sequences.
Source:Campaigns guideCan we re-engage customers on Instagram?
No. Slide sends no outbound or broadcast Instagram DMs and nothing more than 24 hours after the person's last message, and Meta does not allow promotional content under its human-agent tag. Re-engage Instagram followers who are also customers by email or on WhatsApp, if they gave you an address or number and their permission.
Source:Meta: Instagram Messaging API (opens in a new tab)Meta: Instagram Platform overview (opens in a new tab)What does a WhatsApp retention campaign cost?
Meta charges per delivered template, at a rate set by the category it approved the template under and the customer's country, so a template approved as marketing costs the marketing rate for each recipient's country. Slide draws these charges from your prepaid wallet, separately from the plan, and stops sending when the wallet is empty. The exact per-message price for your account is shown in the wallet.
Source:Meta: WhatsApp pricing (opens in a new tab)WhatsApp Business setup guideBilling and wallet guideIs there a page for retention in our market?
There is a page for WhatsApp retention in India, and one for email retention in Canada, where implied consent under CASL lasts 2 years after a purchase. Rules for other markets are summarised under locations.
Source:Canada's Anti-Spam Legislation, s.10(10) (opens in a new tab)Key facts: Customer retention with Slide
Slide is a reasonable fit for a business with opted-in past customers on WhatsApp or email, and particularly a Shopify store, that wants segmented campaigns and store-triggered win-back with unsubscribe and suppression handled: those are built. It is a weaker fit if you want to re-engage people on Instagram, need revenue reporting for WhatsApp messages, or rely on list cleaning and double opt-in, which are not built.
- Product
- Slide (also "Slide by Synquic"), a platform for automating customer messaging across channelsSource:About Synquic
- Company
- SynquicSource:About Synquic
- Workflow
- Retention: segmented WhatsApp campaigns of approved templates, Shopify win-back and reorder events, and email campaigns with one-click unsubscribeSource:Campaigns guideShopify guideCampaigns guide
- Opt-outs
- A contact who opts out is blocked and skipped on every channel; the WhatsApp opt-out keyword list starts empty and must be set
- Email suppression
- Hard bounces and complaints are suppressed; soft bounces are not, and there is no list cleaningSource:Campaigns guide
- 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
- Limitations
- No Instagram re-engagement; automation email steps add no unsubscribe; no double opt-in; WhatsApp revenue is not shown in the dashboardSource:Automation builder guideCampaigns guide
- Pricing source
- The current pricing page, slide.synquic.com/pricingSource:Slide pricing
- Last factual review
Where to go next
- All use casesWhat WhatsApp, Instagram and email automation can do for a business, outcome by outcome, and which channel supports each one fully, partly or not at all.
- Messaging automation by channelWhich channel to automate with Slide: WhatsApp, Instagram or email. How their rules, costs and limits differ, and how one workflow can use all three.
- Slide pricingCurrent plans, what each includes, and how channel usage is charged.
- Retail and ecommerce teamsHow retail and ecommerce teams use messaging automation.
Ready to start retaining customers?
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