WhatSync vs TimelinesAI: which WhatsApp–Attio integration fits?
An honest 2026 comparison of WhatSync and TimelinesAI for Attio sync, shared inboxes, AI access, pricing, and WhatsApp connection options.
By Anish Jain · WhatSync is one of the products compared here.
The quick answer
WhatSync is the leaner Attio-first choice. TimelinesAI is the broader WhatsApp operations suite. The right answer depends on whether the CRM record or the shared inbox is your team's real home.
- Best for
- Teams choosing between the two direct WhatsApp integrations for Attio.
- Not for
- Buyers looking only for official-API broadcast marketing.
At a glance
| Decision | WhatSync | TimelinesAI |
|---|---|---|
| Product centre | Attio CRM | WhatsApp workspace plus CRM integrations |
| Existing number | Yes, QR connection | Yes, QR connection |
| Official API path | Available for WABA workflows | Listed as coming soon on current Attio page |
| Attio sync | Automatic notes and phone matching | Automatic notes and phone matching |
| Send from Attio | Max plan | CRM Integration plan |
| Shared inbox | Inside Attio on Max | Standalone and inside Attio on $40 tier |
| AI access | Read-only MCP search | MCP, agents, summaries, and automation features |
| Monthly entry | $15/user | $25/seat |
Prices are vendor software prices checked September 1, 2026. Taxes, Meta messaging charges, and implementation work are separate.
This is the closest comparison
Both products can connect an existing WhatsApp number with a QR code, match a conversation to an Attio person, create a person when no match exists, save messages as CRM context, and send from Attio. Unlike Zapier or Make, neither asks you to assemble the basic sync from individual automation steps.
The difference is product shape. WhatSync keeps narrowing toward an Attio-native WhatsApp layer. TimelinesAI is expanding into a broader WhatsApp system with a shared inbox, campaigns, assignments, analytics, several CRMs, APIs, and workflow tools.
Choose WhatSync for an Attio-first operating model
WhatSync works best when sales and client work already happens in Attio and WhatsApp is the missing data source. Its Pro plan handles automatic sync and contact creation. Max adds reply and inbox tools in Attio plus a read-only MCP connector for searching the synced message text a user may access.
It is deliberately narrower and less expensive at the entry point. Pro is $15 per user monthly or $10 per user per month when billed annually. The product is also open source, so a technical buyer can inspect the core integration rather than relying only on a marketing page.
- Your team lives in Attio, not in a separate inbox all day
- You want a lower-cost automatic sync before buying a larger suite
- Read-only AI search over synced message text is useful
- An inspectable, open-source core matters to your buyer
Choose TimelinesAI for a broader WhatsApp operation
TimelinesAI is stronger when conversation operations need their own workspace. Its $40 shared inbox tier adds team-wide inbox access, filters, full history, mass-message credits, and the ability to start chats from the inbox. The platform also lists assignments, labels, workflow automation, public API, webhooks, AI agents, and several native CRM integrations.
For a support or high-volume sales team, those are not side features. They may be the reason to buy. TimelinesAI also states that it syncs chat media and attachments into Attio, while WhatSync's QR path currently keeps attachment metadata rather than persisting the media file itself.
- The team needs a dedicated shared inbox with ownership and filters
- You use several CRMs or may move away from Attio
- Campaigns, analytics, API access, and automation sit in one vendor
- Syncing attachment files into the CRM is important today
Connection method is not a footnote
QR linking is quick and works with the WhatsApp account a person already uses. It is useful for founder-led sales and teams whose relationships live on individual numbers. An official WhatsApp Business Account is better suited to approved templates, governed business messaging, and a dedicated business number, but setup and Meta rules are different.
WhatSync supports QR and an official API path, with different capabilities on each. TimelinesAI's current Attio page is centred on QR-connected numbers and marks WABA support as coming soon on its automation plan. Buyers should test the exact connection they intend to operate rather than assuming every feature works on both paths.
The AI story is different too
WhatSync's MCP access is intentionally read only: an eligible user can search and summarise synced message text but cannot send a WhatsApp message. It records attachment captions, filenames, and types when available, but does not currently read inside documents, run OCR on images, or transcribe voice notes.
TimelinesAI markets a wider AI and automation surface, including WhatsApp MCP, MCP skills, ChatGPT agents, summaries, auto-replies, and workflow tools. That breadth is attractive if you want agents to participate in operations. A read-only design is attractive if you want a smaller permission surface for search and drafting.
Bottom line
Pick WhatSync when you want WhatsApp to disappear into a clean Attio workflow. Pick TimelinesAI when you want a WhatsApp operations product that also keeps Attio current. If the team cannot answer where conversations should be assigned, reviewed, and replied to every day, run both trials against that workflow before comparing feature counts.
Frequently asked questions
Is WhatSync cheaper than TimelinesAI?
At published monthly entry prices, yes. WhatSync Pro starts at $15 per user monthly and TimelinesAI CRM Integration starts at $25 per seat monthly. The included feature sets differ, so compare the tier that covers your actual inbox and sending needs.
Which product has the better shared inbox?
TimelinesAI has the broader standalone inbox product, with filters, assignments, history, analytics, and campaign features across its tiers. WhatSync's inbox is designed to keep work inside Attio rather than replace it with a broad separate workspace.
Can both sync media into Attio?
TimelinesAI says its Attio integration syncs chats, media, and contact data. WhatSync's QR route currently stores attachment metadata such as type, caption, MIME type, and filename, but does not persist the media file itself.
Which one supports AI assistants?
Both market AI-assistant connections. WhatSync focuses on read-only MCP search over permitted synced message text. TimelinesAI markets a broader set of MCP, agent, summary, auto-reply, and workflow capabilities.
Sources and research notes
We checked current official vendor pages, not recycled comparison posts. WhatSync publishes this article and is one of the products being compared. External source links use nofollow.
- WhatSync pricing — Plans and current feature scope.
- WhatSync MCP guide — Read access and current media limitations.
- WhatSync open-source core — Public source repository.
- TimelinesAI Attio integration — Attio features, setup, media, and per-seat pricing.
- TimelinesAI pricing — Current CRM, shared inbox, and mass-messaging tiers.
Keep comparing
Want WhatsApp context inside Attio?
Connect the number your team already uses, or start with the official WhatsApp Business route.