Hey Sadia - good list, I've built this exact stack so quick comparison from what I've found: Most agencies I see use one of these: Retell / VAPI / Bland - best voice quality, live transfers + booking work well, GHL integration via Make/Zap. But not really white-label, per-minute costs add up fast, and unlimited agents/numbers gets expensive. Great if you want plug-and-play. What I ended up doing for my own clients - built it in n8n + Twilio + ElevenLabs + GHL workflow. Voice cloning via ElevenLabs, white-label because it's your Twilio numbers + your GHL, call flows + appointment booking in GHL calendar, live transfer with Twilio. Cost is Twilio + ElevenLabs only after, so cheaper for unlimited agents. Not unlimited phone numbers free (Twilio still charges per number) but you own them under your brand. I packaged my version as part of a 6-agent white-label pack I use for trades/dentists etc - happy to share Loom of how I wired the voice + text bot to GHL if useful, just let me know.

Hi Glen, one that springs to mind and still causes embarrassment when I think of it! Job was a local executive car firm - owner wanted booking agent but with a safety blanket. So we talked about a HITL message to her on WhatsApp so she could approve incoming jobs, check capacity, keep abreast of what's coming in and be happy with the booking before it was confirmed. We'd talked about WhatsApp with preloaded buttons - Approve / Ammend, clean, one tap. That's when I found out what an "interesting concept" metas UI on the meta business pages is! - so I substituted SMS instead. In my head same job, just different channel - approval is approval. In her head: fixed on WhatsApp for a reason. If it's SMS she thought it would cause confusion when more than one booking was in the pipeline. WhatsApp thread = you can see which booking you're approving, buttons attached to that job. SMS = just texts floating about, which job is this for? So what I built worked - approval came through, job got confirmed. Technically fine. What she expected: WhatsApp with buttons tied to that specific booking so she always knew what she was approving. Gap = I changed channel without realising channel WAS the feature for her. What I do now: 1. Write HITL channel + format in scope - "Owner gets WhatsApp template with Approve/Reject buttons linked to booking ID" not just "owner approval" 2. Show it on phone in Loom - "this is what YOU see when 2 jobs are in at once" 3. If WABA is employed I flag it upfront, not after - "buttons need template approval, takes a few days" I learned loads from that project, including realising that it doesn't matter nearly so much what I think is an acceptable substitute compared to what the client thinks is acceptable!

@Mouldi Nouri true, I do lots of testing now. And then I test some more!

Hi! My name's Anthony but most call me Tony. I'm UK based and kind of stumbled into this field last year. I had some quite serious health issues which meant I couldn't do my normal job so started exploring. I thought this was going to be loads easier than it is!, my first project was a booking agent using botpress/make/twilio/WABA. I found i really enjoyed the challenge of building especially when things didn't go quite to plan, I've continued on to make all sorts- lead generators, voice agents, invoice chasers, quote engines for trades- anywhere I find a need I like to try and work out a solution. Looking forward to finding out how others deal with issues and problems- happiest when I'm learning!