Synthflow alternative for WhatsApp calls: Dialaunch vs Synthflow

Synthflow describes itself as an AI voice agent platform for enterprise customer service, with a no-code builder, phone deployments and integrations. In October 2025 it announced WhatsApp Business Calls, so a customer who taps call in WhatsApp reaches a Synthflow AI agent. Its WhatsApp page invites buyers to book a demo rather than listing a price.

Dialaunch is for businesses whose customers call them on WhatsApp and who want AI and people working together. On one WhatsApp phone you take one call at a time; the next caller hits a busy line. With Dialaunch, one WhatsApp Business number takes many simultaneous calls: answered by the AI agent, routed to the next free agent, queued with hold music, or handled by the step you configured.

Synthflow’s WhatsApp Business Calling documentation lists clear limits at the time of writing (October 2026): WhatsApp calls work with inbound agents only, they need a phone number purchased through Synthflow (custom Twilio numbers and custom SIP trunks are not supported), each workspace connects to one Meta Business Account, and call transfers do not currently work when a user calls via WhatsApp. Custom actions and real-time booking do work. Check with Synthflow, as products change.

Dialaunch is built around the handoff. The AI hands the call to your team when the caller asks or is upset, and the call follows your flow: a queue that rings agents all at once or in turn, hold music, opening hours and fallbacks. Managers listen live, whisper, take over in one click and hand the call back to the AI with the full context.

Both tools put AI on WhatsApp calls. They differ in how much of the contact centre comes with it.

• WhatsApp voice calls: Synthflow, inbound for its AI agents. Dialaunch, inbound, plus call-backs once the customer accepts a call permission request.
• Number: Synthflow, a number purchased through Synthflow for WhatsApp calling. Dialaunch, the WhatsApp Business number you connect, with your phone number joining through your own SIP trunk.
• Transfer to a person on WhatsApp calls: Synthflow, not currently supported according to its docs (October 2026). Dialaunch, handoff to your team’s queue, ringing on their own WhatsApp, a SIP desk phone or softphone, or the browser.
• Team control: Dialaunch lets you listen live, whisper, take over in one click and hand back to the AI.
• Call flows: Dialaunch adds keypad menus, queues with hold music, opening hours with holidays and time zones, voicemail and fallbacks.
• AI actions: both can book appointments and run custom actions. Dialaunch confirms orders, checks deliveries, creates callbacks and books in Google Calendar.
• Pricing: Synthflow’s WhatsApp page points to a demo. Dialaunch publishes flat plans from €69 a month with AI minutes included.

If you are a large organisation that wants one enterprise voice AI vendor across phone lines and WhatsApp, with fully automated calls that rarely need a person, Synthflow is worth a look. Its no-code builder and phone integrations cover a wide range of enterprise call types.

Dialaunch fits when some calls must reach a person, and your team needs to see and steer what the AI is doing. Every call gets a summary, key moments and an outcome, and reporting shows answer rate, abandoned calls, waiting times and service level per agent, team and number. Recording is optional, with a consent message and automatic deletion, and EU hosting is available.

A WhatsApp number can be connected to one provider at a time, so plan the move with both sides. Setup takes about 15 minutes on your side, and Meta’s approval of the number can take 1 to 3 days; our team can do it for you.

Once connected to Dialaunch, a number stops working in the WhatsApp Business app, and the app’s chat history does not move over. The 14-day trial includes 60 AI minutes.