This is the closest comparison we get asked about, and for good reason: both tools cost $9.99 a month, both cover unlimited locations, and both use AI to write your Google-review replies. ReplyOnTheFly is a legitimate, well-built tool, and at this price it is a genuine alternative — not a punching bag. The real difference is not quality or cost; it is workflow. ReplyOnTheFly is email-first and needs no app or login, and it can post your reply to Google directly. ReviewAI is a dedicated mobile app where every review lands in one inbox, you choose from four named tones, and you post each reply yourself. This page lays out both honestly so you can pick the one that fits how you actually work.
At a glance
| ReviewAI | ReplyOnTheFly | |
|---|---|---|
| Price | $9.99/mo — flat, all locations | $9.99/mo (Pro); free tier too |
| Free plan | 1 location, 5 AI replies/day | Unlimited drafts, 5 direct posts/mo |
| Workflow | Mobile app — all reviews in one inbox | Email-driven — no app, no login |
| Posting | Drafts — you post manually | Posts to Google directly / auto |
| Tones | Four named tones to choose | Brand-voice AI reply |
| Locations | Unlimited | Unlimited |
| Extras | — | Optional SEO posts $4.99, rank heatmap $7.99 |
| Best for | People who want a phone app, tone control and one inbox | People who want email-driven, hands-off auto-posting |
Where ReplyOnTheFly is the better fit
If you would rather not install or open another app, ReplyOnTheFly is built for you. There is no login: a new review triggers an email with an AI-suggested reply, written in about two seconds and matched to your brand voice. You read it, tweak it if you like, and approve it in one tap — and it posts to Google directly. You can also let it post automatically, which makes the whole thing genuinely hands-off. That direct-to-Google posting is its real convenience edge, and it is something ReviewAI deliberately does not do. On top of replies, ReplyOnTheFly offers optional add-ons — AI Google Business posts for SEO at $4.99/month, and a Maps rank-tracking heatmap at $7.99/month — if you want a little local-SEO tooling alongside your review replies. If email-first, no-app, hands-off is the way you want to work, it is a strong choice.
Where ReviewAI fits better
ReviewAI takes the opposite approach. It is a dedicated mobile app for iOS and Android where all of your Google reviews collect in one inbox — with read-state and history, so you can see at a glance what you have already handled. When you reply, you pick from four named tones — professional, friendly, apologetic or grateful — and GPT-4o drafts a response in that voice. You can read it, edit it, and then post it to Google yourself.
That last part is intentional: ReviewAI does not auto-post. It drafts; you review and post. The trade-off is that it is slightly more hands-on than an auto-posting email flow — but you stay fully in control of every word that goes out under your business name, and nothing is published without your final say. If you like having one place on your phone to triage reviews, want explicit control over tone, and prefer to approve and post each reply yourself, ReviewAI is the better fit.
The honest summary
These are two good tools at the same $9.99 price, with unlimited locations on both — so price will not make the decision for you. Choose ReplyOnTheFly if you want an email-driven, no-app flow that can post to Google directly and even run hands-off, with optional local-SEO add-ons. Choose ReviewAI if you want a dedicated phone app with all your reviews in one inbox, four named tones to choose from, and the control of posting each reply yourself. Different workflows, same job done well — pick the one that matches how you like to work.
Common questions
Is ReviewAI like ReplyOnTheFly?
They overlap, but the workflow differs. Both are $9.99/month with unlimited locations and both use AI to write your Google-review replies. ReplyOnTheFly is email-driven and needs no app or login: a new review arrives as an email with a suggested reply you approve in one tap, and it can post to Google directly. ReviewAI is a dedicated mobile app where every review sits in one inbox, you pick from four named tones, and you post the reply yourself.
Does ReviewAI post replies to Google automatically?
No. ReviewAI drafts a response for you to read, edit and approve, then you post it to Google yourself. It does not auto-post. That is a deliberate choice — you stay in control of what goes out under your name. ReplyOnTheFly is the opposite here: it can post to Google directly, by one tap or fully automatically, which is its real convenience edge if hands-off is what you want.
Which is cheaper, ReviewAI or ReplyOnTheFly?
Neither — they are the same price. Both are $9.99/month with unlimited locations, and both have a free tier. Price will not decide this for you, so choose by workflow: ReplyOnTheFly if you want email-driven, hands-off posting straight to Google; ReviewAI if you want a phone app, four named tones and one inbox where you post each reply yourself.
ReviewAI is launching soon for iOS and Android. Join the early list and we'll email you the day it goes live.
See also. ReviewAI vs Birdeye · ReviewAI vs Podium
Sources. ReplyOnTheFly plans, workflow and add-on details (as of 2026): replyonthefly.com. Figures are subject to change — check ReplyOnTheFly for current details.