Price terms as published
Each line is the vendor’s own wording, split from the price capture checked on 2026-09-06. Nothing here is rounded, converted or re-worded — the full sentences stay in the review below. Lines that carry only a price continue the plan named on the line above, in the vendor’s own order.
| # | Plan / term | Checked |
|---|---|---|
| 1 | Per-message pricing (not a subscription) | 2026-09-06 |
| 2 | exact per-message rates set by expert agents | 2026-09-06 |
One-liner: Kopai is a marketplace for expert AI agents where users pay per message rather than by subscription. Experts build agents from their knowledge, publish them on the marketplace, and set their own per-message markup. It’s early-stage — the supply side is still small, and the product is in active development.
Verified facts (checked 2026-09-06)
| Attribute | Value | Source |
|---|---|---|
| Pricing model | Per-message (not subscription) | usekopai.com + Product Hunt |
| Agent building | No-code, knowledge upload (PDF, DOC, XLSX) | usekopai.com |
| Revenue split | 70% to creators | Stork.AI review + official site |
| Free tier | Free to build and publish; free messages per agent | usekopai.com |
| Context window | Up to last 30 messages per conversation | Product Hunt comment from Kopai team |
| Custom domain | Embed on your own domain, bill through Kopai | usekopai.com |
| Risk tiers | Low/Medium/High assigned per agent | usekopai.com (“Why the gate holds”) |
| Product Hunt followers | 262 | Product Hunt page |
| Launch status | Waitlist / early access | usekopai.com (“Join waitlist→”) |
| Teams version | Coming (seats, roles, private agents) | usekopai.com footer |
How per-message pricing actually works
Kopai’s model is different from most agent platforms:
- Each message has a cost = runtime cost + publisher markup. Both are itemized so the user sees both halves.
- Creators set their own markup on top of the base runtime cost. Kopai takes a 30% cut (70% to the creator).
- Free messages first: every listed agent is free for its first few messages, so users can try before paying.
- Wallet model: users top up a balance; messages deduct from it as they’re sent. No subscription lock-in.
The advantage is obvious — you only pay for what you use, and it’s cheap to experiment. The disadvantage is unpredictable costs for heavy users. A long conversation with a complex agent could get expensive fast.
The cold-start problem
Kopai is clearly early-stage:
- 262 Product Hunt followers — a reasonable launch number, but not a sign of massive traction.
- The team acknowledges seeding experts with friends and colleagues (per Product Hunt comments).
- Supply side (number and quality of expert agents) is the biggest question mark. A marketplace lives or dies by its inventory.
- The “risk tier” system (Low/Medium/High) suggests quality control is on their mind, but at this stage the actual curation bar is hard to verify.
This doesn’t mean it’s bad — every marketplace starts somewhere. But it means you should evaluate it as “interesting early product,” not “established platform.”
What’s actually interesting
A few things stand out about the model:
- Per-message instead of subscription — aligns cost with actual value. If an expert agent gives you one good answer, you pay for one answer, not $20/month.
- Transparent cost breakdown — runtime vs. markup are itemized. You know what you’re paying the platform vs. the expert.
- Custom domain embedding — build an agent on Kopai, embed it on your own site, and Kopai handles billing/payouts. Useful for consultants who want to productize their knowledge.
- Resumable answers — if wifi cuts out mid-answer, it picks up where it stopped. Small detail but good UX.
Who it’s for
- Independent experts / consultants who want to productize their knowledge without building a tool from scratch
- Curious users who want niche expert answers without committing to a subscription
- Not ideal for teams needing enterprise controls (still early), or anyone looking for a mature marketplace with thousands of agents
- Liability concern: if an “expert” agent gives wrong advice that costs someone money, it’s not clear who’s responsible. Kopai’s terms and risk tier system are worth reading before relying on paid agent advice for anything high-stakes.
Alternatives to consider
- GPT Store — largest agent marketplace, subscription model (ChatGPT Plus)
- Claude Skills — Anthropic’s agent ecosystem
- AITOPIA — no-code agent builder + marketplace, bundled subscription
- CustomGPT / Dante AI — if you want to build and host your own knowledge-base agent
Bottom line
Kopai’s per-message expert agent model is a genuinely interesting approach to AI marketplace monetization — it aligns costs with actual usage and gives creators a simple way to monetize their knowledge. The 70% creator share is real, and the custom-domain embedding is a nice touch. But it’s very early — 262 Product Hunt followers, small supply side, and unanswered questions about quality control and liability. Worth watching and experimenting with, but not yet a platform to build a business around.