Choose Smith.ai if you mainly need your calls answered, especially if you want the option of live human receptionists. Choose InstantReply if you also need every new lead called back in under 60 seconds, appointment reminders, no-show follow-up, and old leads re-engaged, all set up and run for you.
“We were missing leads because of slow replies, especially after hours. InstantReply fixed that by responding instantly, and we’ve seen more conversations actually turn into real opportunities.”
Cian Gallagher · Verified review on Trustpilot
Smith.ai has been answering phones for businesses since 2015. It combines an AI receptionist with a network of live, North America-based receptionists, and it's especially popular with law firms for client intake. The honest short version of any Smith.ai review: if picking up every call is the only thing you need, it's a solid choice.
But for most service businesses, the call is only the start. The lead that filled in your form at 9 p.m., the patient who didn't show up, the quote from three months ago that went quiet. That's where revenue leaks, and that's the job InstantReply was built for.
| Feature | Smith.ai | InstantReply |
|---|---|---|
| What it is | AI and human answering service | Done-for-you AI employees that cover every step of the lead’s journey |
| Answers inbound calls 24/7 | Yes:Yes | Yes:Yes |
| Live human receptionists | Yes:Yes, as an option | No:No. Urgent and high-intent callers go to your own team. |
| Books into your calendar | Yes:Yes | Yes:Yes |
| Calls new web leads back in under 60 seconds | Partly:Not the core of the service | Yes:Yes |
| Reminders and no-show follow-up by call and text | Partly:Not the core of the service | Yes:Yes |
| Re-engages old and lost leads | No:No | Yes:Yes |
| Review and referral requests | No:No | Yes:Yes |
| How it’s priced | Monthly call bundles, billed per call | Quoted on a short demo call |
| Setup | Self-serve, or done for you on larger plans | Always done for you, live in 5 days |
An answering service waits for the phone to ring. Our AI Follow-Up System calls every new form lead back in under 60 seconds, before they've had time to try a competitor. How speed to lead works
Reminders 24 hours and 1 hour before appointments, no-show rebooking, quote chasing, and follow-ups at 7, 14, and 30 days for leads who go quiet.
AI Nurture and Close reaches back out to the leads sitting in your CRM and books the ones who are ready now.
Choose Smith.ai if your main problem is unanswered calls, you want human receptionists available, and your team already follows up well on every lead.
Choose InstantReply if leads are going cold after the first contact: slow replies to web forms, no-shows that never get rebooked, and a CRM full of people nobody has followed up with.
Most Smith.ai competitors fall into two groups: other answering services, and build-it-yourself voice AI platforms like Synthflow and Bland AI. Among Smith.ai alternatives, InstantReply is a different kind of option: it's done for you, and it covers the follow-up an answering service doesn't.
Weighing AI against people in general? AI receptionist vs human receptionist
Smith.ai sells monthly call bundles and bills per call, for both its AI receptionist and its live receptionists. Current prices are on Smith.ai’s own site. InstantReply is quoted on a short demo, based on which AI employees you need.
It depends on your call volume and which AI employees you need. Smith.ai bills per call, so short calls cost the same as long ones. We’ll give you an exact number on the demo so you can compare properly.
No. Our AI handles the calls and texts, and anything urgent or high-intent goes straight to your own team.
Yes. Some businesses keep a live answering service for inbound calls and use InstantReply for new lead follow-up, reminders, and reactivating old leads.
Yes. Calls can be routed through your existing business number.
Usually 5 days from kickoff to live.
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Smith.ai, Synthflow, Bland AI, Vapi, and GoHighLevel are trademarks of their respective owners. InstantReply.ai is not affiliated with them. Comparisons are based on publicly available information as of September 28, 2026. If something here is out of date, email us at info@instantreply.ai and we'll fix it.