Callabo: Korean AI meeting-notes service from Return Zero that records, transcribes, summarizes, and analyzes meetings for individuals and teams. Optiverse: Swiss AI meeting assistant (Optiverse AG, Zurich) that transcribes meetings, generates summaries and action items, and feeds CRM and workflow tools. Below, they line up on price, capture method, and how each fits a real meeting stack.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist Callabo when turning recurring internal team meetings into shareable summaries and action items matters most, and Optiverse when enriching crm records and follow-up tasks from sales meetings matters most. Try them side by side on real calls before deciding — needs vary by team.
Korean AI meeting-notes service from Return Zero that records, transcribes, summarizes, and analyzes meetings for individuals and teams.
Swiss AI meeting assistant (Optiverse AG, Zurich) that transcribes meetings, generates summaries and action items, and feeds CRM and workflow tools.
Callabo (콜라보) is an AI meeting assistant developed by Return Zero (리턴제로), a Korean speech-AI company. It automatically records, transcribes, summarizes, and analyzes business meetings for both individuals and enterprise teams, aiming to turn a one-hour meeting into organized notes with a single click and no complex setup. Callabo connects to online meetings on Google Meet, Microsoft Teams, Zoom, and Webex, and also supports recording in-person meetings. After a meeting it produces transcripts, paragraph summaries, key discussion points, and action items with timestamped source quotes, and it can automatically detect the meeting language to handle multilingual conversations. An AI chat feature lets users ask follow-up questions about a meeting beyond the generated insights. The service integrates with workflow tools including Google Calendar, Outlook, Salesforce, Pipedrive, HubSpot, Slack, Microsoft Teams, Zapier, Notion, Confluence, and Linear. For enterprises, Callabo provides meeting access controls, team and member permission management, original-media retention settings, two-factor authentication, IP access restrictions, and audit logs, and it holds ISO/IEC 27001 certification. Mobile apps are available for both iOS and Android. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Optiverse is an AI meeting assistant developed by Optiverse AG, a Swiss company headquartered in Zurich and incorporated in 2024. The platform centralizes and automates meeting data for both virtual and in-person meetings, capturing conversations via integrations with Zoom, Microsoft Teams and Google Meet as well as in-person recordings. Its OptiAgent assistant auto-generates transcripts, summaries and action items in 45+ languages, lets users ask for key points and insights from a meeting, and goes beyond documentation by populating tasks in boards, drafting follow-up emails and syncing data into downstream workflows. Optiverse markets a dedicated sales configuration that turns meeting content into CRM enrichment, pipeline updates and assigned follow-up tasks, and the company states it offers a large catalog of integrations spanning transcripts, email, meetings, CRM and messaging. It is offered as a cloud product for SMEs and an on-premise option for larger enterprises. On the compliance side, Optiverse emphasizes Swiss hosting, enterprise-grade security, GDPR and Swiss FADP alignment, ISO 27001 certification, and a stated policy of not using customer data for AI model training. The product is actively operating in 2025/2026, with the company reporting daily meeting usage and B2B pilots and having received Swiss startup funding and recognition. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Callabo is a free tier with paid upgrades (freemium); Optiverse is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Callabo | Optiverse |
|---|---|---|
| Core capability | Automatic recording and transcription for Google Meet, Teams, Zoom, and Webex | OptiAgent assistant producing transcripts, summaries and action items in 45+ languages |
| Standout feature | Paragraph summaries, key discussion points, and timestamped action items | Capture for virtual meetings (Zoom, Teams, Meet) and in-person recordings |
| Team usage | Automatic meeting-language detection for multilingual meetings | Follow-up email drafting and automatic task creation in boards |
| Integrations | AI chat to ask follow-up questions about a meeting | CRM enrichment and sales-pipeline workflow automation |
| Languages & capture | Integrations with calendars, CRM, messengers, and project tools | Broad catalog of integrations across transcripts, email, CRM and messaging |
| Best-fit workflow | Enterprise security: permissions, 2FA, IP restrictions, and audit logs | Cloud and on-premise deployment options |
Callabo
Choose Callabo if you need turning recurring internal team meetings into shareable summaries and action items — strengths include serves both individual users and enterprise teams.
Optiverse
Choose Optiverse if you need automating meeting notes and action items for swiss and european teams — strengths include swiss-hosted with strong privacy positioning (gdpr, fadp, iso 27001).
Callabo
Optiverse
It depends on your workflow. Callabo is strong for turning recurring internal team meetings into shareable summaries and action items, while Optiverse is strong for automating meeting notes and action items for swiss and european teams. Both transcribe and summarize meetings.
Callabo is a free tier with paid upgrades and Optiverse is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
You can — some teams pair them when each covers a different part of the meeting workflow.
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