Dialaunch vs SleekFlow: the SleekFlow alternative for WhatsApp calls

SleekFlow presents itself as an AI-powered omnichannel platform for B2C brands, with WhatsApp, chat and email in one inbox, broadcasts and automation. Its VoIP product lets teams make and take phone calls in the browser or its iOS and Android apps, with calls logged in the customer timeline. SleekFlow says these calls run on cloud VoIP; you buy a number inside SleekFlow in selected markets or connect an existing Twilio number.

Dialaunch is for businesses whose customers call them on WhatsApp. One phone can only take one WhatsApp call at a time; the next caller hits a busy line. Dialaunch lets one WhatsApp Business number take many calls at once, with an AI agent that sounds like a person and a team that stays in control.

On its VoIP page, SleekFlow answers the question of whether it supports WhatsApp Business Calling with “Not today”, and invites businesses that need it to talk to sales. That was the position at the time of writing (October 2026); check with SleekFlow, as products change.

Dialaunch starts from the WhatsApp call. Every call goes through a visual flow you design: the AI agent, a keypad menu, a queue with hold music, opening hours with holidays and time zones, voicemail and fallbacks. It rings on the phone your team already uses: their own WhatsApp, a SIP desk phone or softphone, or the browser.

Both tools cover customer conversations. Only one is built around WhatsApp voice.

• WhatsApp voice calls: SleekFlow, not supported per its VoIP page (October 2026). Dialaunch, inbound WhatsApp calls, plus call-backs once the customer accepts a call permission request.
• Phone calls: SleekFlow, VoIP numbers bought in SleekFlow or a connected Twilio number. Dialaunch, your own number through your SIP trunk, with no number provision or porting.
• AI on calls: Dialaunch’s AI agent answers in any language your customers speak and books, confirms, checks and creates callbacks. It says it is an AI and hands over when asked or when the caller is upset.
• Call flows: Dialaunch, keypad menus (IVR), queues with hold music, opening hours, voicemail and fallbacks.
• Supervision: Dialaunch, listen live, whisper, take over in one click and hand back to the AI.
• Messaging: SleekFlow has broad broadcast and automation tools. Dialaunch has a shared inbox for WhatsApp, Instagram, Messenger and email messages.

If your priority is WhatsApp marketing, broadcasts and chat automation across channels, and voice means regular phone calls rather than WhatsApp calls, SleekFlow is a solid fit. Its mobile apps also suit teams that work from their phones.

Dialaunch fits when customers already press the call button in WhatsApp and you are missing those calls. Calls are answered by the AI agent or your team, 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.

You can keep SleekFlow for campaigns and chats on one number and connect the number customers call to Dialaunch.

Once a WhatsApp number is connected to Dialaunch, it stops working in the WhatsApp Business app on that number, and the app’s chat history does not move over. Setup takes about 15 minutes with a guided flow; Meta’s approval of the number can take 1 to 3 days.