How do their growth rates compare?

Kaption AI has a month-over-month growth rate of +110.5%; ReplyGuy has -62.8%.

How does pricing compare?

Kaption AI: Freemium. Freemium: the Chrome and Edge extension is free to install with core transcription and summaries, while paid plans unlock higher volumes, hourly encrypted backups, and advanced features. The desktop app is a separate download. ReplyGuy: Freemium, Free Trial. ReplyGuy offers a free tier plus paid plans billed monthly or yearly. The free plan includes 5 keywords, 6 credits per month, and 1 project. Paid tiers scale up: Small around $10/month (20 credits), Pro around $49/month (100 credits, 10 keywords), Business around $99/month (300 credits, 25 keywords, 5 projects), Enterprise around $199/month (1000 credits, 100 keywords, unlimited projects), and Agency around $499/month (5000 credits, 1000 keywords). Yearly billing offers a discount. Each posted reply or surfaced comment costs 1 credit; a brand audit costs 5 credits after the first free one.

What are alternatives to Kaption AI and ReplyGuy?

Other tools in related categories include Tactiq, Fireflies.ai, Notta, Transcribe Audio to Text, Respond.io.

Kaption AI vs ReplyGuy — Traffic (60.36K vs 2.28K), Pricing & Verdict

Open AI Tools

Kaption AI vs ReplyGuy — Traffic (60.36K vs 2.28K), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Kaption AI	ReplyGuy
Official Domain	kaptionai.com	replyguy.com
Pricing Model	Freemium	Freemium, Free Trial
Monthly Visits	60.36K (60,361)	2.28K (2,280)
MoM Traffic Delta	+31.69K (+110.5%)	-3.86K (-62.8%)
Primary Market & Share	🇧🇷 Brazil (67.6%)	🇺🇸 United States (86.3%)
Direct Visits / mo	25.09K	896
User Rating	4.3	3.8
Supported Platforms	Website	Website

Kaption AI

Read WhatsApp voice notes instead of listening to them

Voice-note transcription

Tap a button on any WhatsApp voice note to read it in the bubble, with automatic transcription of new voice notes and search across transcripts.

AI chat summaries and assistants

Condense long conversations with selectable AI models and summary styles, or connect ChatGPT, Claude or Cursor through an MCP endpoint to query your chats.

Live translation in 36 languages

Read incoming messages in your language and send replies translated as you type, with per-chat language settings or automatic detection.

Call recording with transcripts

In the desktop app and extension, record WhatsApp voice and video calls and get a transcript that separates each speaker.

Strengths & Pros

+Turns voice notes into searchable text right inside WhatsApp Web
+Strong privacy options including on-device transcription and encrypted backups
+Broad feature set beyond transcription: translation, calls, scheduling, Kanban, MCP
+Available on Chrome, Edge, Windows, Mac, iPhone and Android