
Provides a robust free tier with unlimited local video recording, but lacks Otter's deep enterprise knowledge management features.

Otter AI records 7,360,981 monthly visits with +9.6% month-over-month growth and Freemium pricing. Thinkstack.ai records 917 monthly visits with -47.4% growth and Freemium pricing.

Build custom AI chatbots and agents trained on your own data
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | otter.ai | app.thinkstack.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 7.36M (7,360,981) | 917 (917) |
| MoM Traffic Delta |
| +644.45K (+9.6%) |
| -828 (-47.4%) |
| Primary Market & Share | 🇺🇸 United States (69.8%) | 🇺🇸 United States (48.2%) |
|---|
| Direct Visits / mo | 5.02M | 367 |
|---|
| User Rating | 4.5 | 4.1 |
|---|
| Supported Platforms | Website | Website |
|---|

AI meeting agent that transcribes, summarises, and turns every conversation into searchable knowledge
Live transcription in multiple languages with speaker identification, so meeting records are accurate and attributable.
Each meeting becomes a clear summary with decisions, action items, and insights, with next steps captured and assigned automatically.
Ask questions across your meetings and connected apps to instantly produce follow-ups, reports, and content.
Get briefing documents before a meeting and real-time, personalised coaching during calls based on your history and playbooks.

Build custom AI chatbots and agents trained on your own data
Create fully functional AI agents in seconds from a visual, no-code interface without engineering help.
Connect multiple data sources so the bot answers from your own documents, help content, and websites.
Automate customer actions and build autonomous systems that require minimal human oversight.
Move complex chats to live agents and collect structured data through chat-based forms.

Provides a robust free tier with unlimited local video recording, but lacks Otter's deep enterprise knowledge management features.

Excels at automated meeting transcription and CRM integrations, but offers a less conversational live note-taking experience than Otter.

Offers strong multilingual transcription and translation tools, but lacks Otter's widespread enterprise adoption and team collaboration features.
#3Great for recording and clipping video calls across platforms, but less focused on real-time dictation than Otter.

SpecialistVoice AI for meetings, call centers, and developers

SpecialistBot-free AI note taker that captures and summarizes every meeting

AI customer service that answers instantly and turns chats into revenue

Custom AI agents trained on your documentation and knowledge base

Generates highly structured meeting notes with actionable tasks, but lacks Otter's dedicated live audio dictation app.

Stronger revenue intelligence and CRM synchronization features, but geared more toward sales teams than general note-taking.

Automates meeting insights routing to external productivity tools, but has a smaller ecosystem than Otter.

Custom AI support chatbots trained on your own website content
Provides a robust free tier with unlimited local video recording, but lacks Otter's deep enterprise knowledge management features.
Excels at automated meeting transcription and CRM integrations, but offers a less conversational live note-taking experience than Otter.
Offers strong multilingual transcription and translation tools, but lacks Otter's widespread enterprise adoption and team collaboration features.
Great for recording and clipping video calls across platforms, but less focused on real-time dictation than Otter.
SpecialistVoice AI for meetings, call centers, and developers
SpecialistBot-free AI note taker that captures and summarizes every meeting
AI customer service that answers instantly and turns chats into revenue
Custom AI agents trained on your documentation and knowledge base
Generates highly structured meeting notes with actionable tasks, but lacks Otter's dedicated live audio dictation app.
Stronger revenue intelligence and CRM synchronization features, but geared more toward sales teams than general note-taking.
Automates meeting insights routing to external productivity tools, but has a smaller ecosystem than Otter.
Custom AI support chatbots trained on your own website content