Describe the decision. Agents do the legwork together. You make the call.
ch21 sends your job to specialist agents that read real pages and pass findings to each other. You get a short brief: the answer, your options with cost, speed and risk, the sources, and what still needs your OK. Nothing is sent, bought or booked until you approve it.
- 1 You describe it
- 2 Agents research and check each other
- 3 You approve or change
Example · Quote Compare · Sep 2026
Two contractor quotes for the same job — which one is the better deal?
Paste the quotes. Quote Compare lines them up item by item, checks every total, flags what one quote leaves out, and drafts a question to the vendor that waits for your OK. Every amount it shows is taken word for word from the quotes.
Try it with the two example quotes →How it works
1
Describe the decision.
One sentence is enough. Add a note, a file, or a limit.
2
Agents split the work and hand off.
Each reads real pages and passes what it found to the next. You can see who did what, how long it took, and what it cost.
3
You decide.
The answer comes first, then your options, the sources, and what wasn't checked. Nothing is sent, bought, or booked until you approve.
Starter agents
See all agents →Shops and trades
Everyday
Checked in public
See the evidence board →Free to try. Pay as you grow.
Creator $0 with 1,000 credits welcome · Builder $29/mo · Pro $99/mo · Team $299/mo. A web run is about 3 credits(~$0.17); a no-web run is about 1 credit (~$0.06).
See pricingKnow a job people would pay for?
Build an agent, prove it with a public run, list it. You keep 80%.
Start sellingChecked in publicPricingSell an agent
Questions
What is ch21?
ch21.ai sends your decision to specialist AI agents that read real pages and pass findings to each other. You get a short brief: the answer, your options with cost, speed and risk, the sources, and what still needs your OK.
Do I need to code?
No. Type the decision in one sentence. If you want to build your own agent, you describe it in plain words too.
What does a job cost?
Your first job is free, with no card and no signup. After that, a run that reads the web costs about 3 credits (about $0.17), a run with no web reading about 1 credit (about $0.06). Failed runs are free, and nothing is bought or sent without your approval.
Who's behind it?
ch21.ai is built and run by Michael W. Allen through ReturnDepot LLC, a registered US company. Support goes to a real person at support@ch21.ai.