Koji and Substrata are both AI meeting assistants for recording, transcription, and summaries, compared here on pricing, features, and workflow fit. Koji: AI-native customer research platform whose AI interviewer runs voice and text discovery conversations at scale, then synthesizes themes automatically. Substrata: AI sales intelligence platform that analyzes the social and emotional signals behind conversations to help dealmakers read buyer intent. They overlap on ai-meeting-assistants, so the right pick depends on team size, budget, and which meeting workflows you automate.
How Hosiqo compares and tests toolsFinal recommendation
For ai-meeting-assistants workflows, shortlist Koji when running exploratory discovery interviews without scheduling live calls matters most, and Substrata when reading buyer intent and sentiment during negotiations matters most. Both record across Zoom, Google Meet, and Microsoft Teams; trial each on real meetings before committing.
AI-native customer research platform whose AI interviewer runs voice and text discovery conversations at scale, then synthesizes themes automatically.
AI sales intelligence platform that analyzes the social and emotional signals behind conversations to help dealmakers read buyer intent.
Koji is a free tier with paid upgrades (freemium); Substrata is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Koji | Substrata |
|---|---|---|
| Core capability | AI interviewer that runs asynchronous voice and text discovery conversations at scale | SoundWave real-time analysis of tone, pace, pauses, and interruptions |
| Standout feature | AI research agent that drafts research goals and interview guides from a brief | Behavioral analysis of buyer attitudes, intent, and power dynamics |
| Team usage | Automatic per-interview analysis with key moments and sentiment | Email signal analysis for sentiment and engagement |
| Integrations | Cross-interview synthesis into study-wide themes, patterns, and recommendations | Deal momentum tracking across conversations |
| Languages & capture | Insights traceable back to specific participant quotes | Coaching insights focused on social and emotional cues |
| Best-fit workflow | MCP integrations with Claude, ChatGPT, Cursor, and Notion | SoundWave real-time analysis of tone, pace, pauses, and interruptions |
Koji
Choose Koji if you need running exploratory discovery interviews without scheduling live calls — strengths include removes scheduling overhead by running many interviews in parallel and asynchronously.
Substrata
Choose Substrata if you need reading buyer intent and sentiment during negotiations — strengths include analyzes social and emotional subtext beyond plain transcription.
Koji
Substrata
It depends on your workflow. Koji is strong for running exploratory discovery interviews without scheduling live calls, while Substrata is strong for reading buyer intent and sentiment during negotiations. Both transcribe and summarize meetings.
Koji is a free tier with paid upgrades and Substrata is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
Yes. Many teams run more than one meeting assistant when the workflows are complementary and the budget is justified.