Causo vs Kai
Causo and Kai are both AI assistants tools. Causo is aimed at small businesses and freelancers, while Kai is aimed at freelancers and small businesses. Causo costs less, from $19/mo versus $20/mo for Kai. Both have a free plan.
AI prospecting agent that researches leads with sources, plus MCP
AI executive assistant for email, meetings, calendar and tasks
| Pricing | Freemium · $19 | Paid · $20 |
| Starting price | $19/mo | $20/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Built for | Small businesses, Freelancers, Agencies | Freelancers, Small businesses, Enterprise |
| Platforms | web | web, macos, android |
| Country | GB · 2025 | CH |
| Rating | — | — |
Choose Causo if
Founders and small sales teams prospecting into niche markets who want sourced research rather than raw database filters.
- Finds companies in niches that static databases miss
- Every match comes with sources you can check
- Low $19 entry plan and a free start without a card
Look elsewhere if: Sales teams that need a huge contact database, CRM sync and full multichannel sequencing (Apollo, ZoomInfo).
Choose Kai if
Founders, executives and consultants who want one assistant across email, meetings, calendar and tasks with approval before every action.
- Never sends or deletes without your confirmation
- No meeting bot joins your calls
- Free trial with no card and no time limit
Look elsewhere if: People who only need a fast email client or a meeting notepad (Superhuman, Granola).
Causo vs Kai pricing
Causo
- Free$050 one-time tokens, 20 agent messages, 1 mailbox, no card
- Let me try$19/mo100 tokens/mo, unlimited agent messages, CSV export
- Founder's Delight$79/mo500 tokens/mo, up to 3 mailboxes, top-ups $0.30/token
- Serious Business$259/mo2,000 tokens/mo, up to 5 mailboxes, top-ups $0.30/token
- EnterpriseCustomCustom tokens, unlimited mailboxes, team workspace
Kai
- Free trial$0One-time allowance, all features, no card, no time limit
- Base$20/moPer seat; base monthly allowance
- Pro$50/moPer seat; 5x Base allowance, includes Morgen Pro
- Ultra$100/moPer seat; 10x Base allowance, includes Morgen Pro
Causo · Key features
- Plain-language ideal customer search across public web sources
- Sourced evidence explaining why each company matches
- Decision-maker lookup with email verification
- Research-based outreach drafts you edit before sending
- Connected mailboxes and one-token outreach sequences
- Remote MCP server for Claude, ChatGPT, Cursor and Codex
Cons
- No CRM integration named on the site
- Tokens run out quickly on large prospect lists
- Prices are marked early bird and may change
Kai · Key features
- Botless meeting capture with live transcripts
- Meeting summaries with owners, action items and drafted recap emails
- Email triage into needs reply, FYI and waiting for reply
- Reply drafts in your own writing style and follow-up nudges
- Unified Google and Outlook calendar timeline with a daily brief
- AI-ranked task list filled from meetings and email
Cons
- Usage allowances are not published in absolute terms
- Hitting the monthly allowance pauses work until you upgrade
- Full two-sided call capture needs the Mac app
Causo vs Kai: FAQ
Which is cheaper, Causo or Kai?
Causo starts at $19/mo and Kai at $20/mo. Both prices are checked on the vendors' own pricing pages.
Do Causo and Kai have a free plan?
Yes, both Causo and Kai have a free plan; paid plans add more usage and features.