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History & deduplication
When supported by the connected WhatsApp session, WhatSyncs can synchronize available conversation history while preventing duplicate records — so a newly connected number arrives with context instead of an empty timeline.
Honest scope
This is one of the easiest features to overclaim, so here is the precise position.
Deduplication
WhatSyncs identifies synchronized messages across realtime events, reconnects and available history so your CRM does not fill with duplicates. This is the part of an integration that is easy to skip and expensive to retrofit — a duplicated timeline is worse than no timeline, because people stop trusting it.
The message arrives as it is sent or received.
The session comes back and replays what it missed.
Existing conversation history is backfilled.
Your endpoint timed out and the delivery is repeated.
Why it matters
History is not nostalgia. It is the difference between a CRM record that is useful on day one and one that becomes useful in six months.
Populate existing contacts with the conversation that already happened before you connected the number.
When an agent leaves, the account they were handling arrives with its history rather than a blank page.
A returning customer's previous issue is on the record, so nobody asks them to explain it again.
Where the connected WhatsApp session makes it available, yes. How far back that reaches depends on what the linked session exposes, so it is not guaranteed to cover every message ever sent.
Every message carries a stable identifier, and WhatSyncs reconciles messages seen through realtime events, reconnects and history against it. Webhook deliveries also carry an idempotency key so a retry does not create a second record.
Yes. Backfilled messages are classified as history, which lets your integration import them quietly instead of triggering the notifications and automations you run for live traffic.
FAQ
Where the connected WhatsApp session makes it available, WhatSyncs can synchronize existing conversation history so your systems start with context rather than an empty timeline. How far back history reaches depends on what the linked session exposes, so it is not guaranteed to cover every message ever sent.
Every message carries a stable identifier, and WhatSyncs reconciles messages seen through real-time events, reconnects and history synchronization against it. Webhook deliveries also carry an idempotency key so a retry does not create a second record in your CRM.
An active chat is a conversation with a single contact that had at least one synchronized message during the billing month. Ten messages back and forth with the same customer in a month counts once, not ten times.
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