# Jigsaw > Jigsaw is a group chat where every group's chat is its own app. Anyone in a group types @jigsaw and asks for something, like a league table, a countdown, a murder mystery or a whole new look. An AI agent builds it, everyone tries a preview, and it goes live when the group approves. ## Key facts - Use it at https://chat.jigsawapps.com. Jigsaw for iPhone is on the App Store: https://apps.apple.com/app/id6827797279 - Sign in with a mobile number and a code sent by text. No password. - Start a group by picking friends from your contacts, or with an invite link or QR code that opens in the app or a browser. Say what the group is for (friends, house, team, trip or family) and it starts with ready-made pieces to match. - Ask for a change by typing @jigsaw in the chat, or with the Jigsaw button, by typing or by saying it out loud. A vague ask like "make it fun" gets three ideas that fit the group, to tap. Not quite right? Ask again and it tweaks the same change. - @jigsaw also answers questions about the chat, catches you up on what you missed (shown only to you), sets reminders and adds things to the group's pieces. These are free. - It notices bets, money owed, plans, dates to count down to, decisions, whose turn it is and trips in the chat, and offers the piece that fits, with one tap. - Every change passes automatic checks and an AI safety review, then everyone can try a preview. Each group chooses who approves: more than half the group, or only its admins. - History keeps every version: go back to any of them. Safe mode shows the plain chat if something looks broken. - Ready-made pieces add with one tap: bet tracker, money splitter, who's in, poll, chore rota, countdown, five-a-side league, flake board, gym streaks and trip planner. Jigsaw shows the ones groups like yours use most. Groups can share what they build with other groups: code only, never messages or data. - Send messages, photos, videos, voice notes and files, with replies, reactions and read ticks. - Each group's app runs in a sandbox on an address of its own, with no access to the internet or to other groups. - Voice notes, photos, videos and files are never sent to the AI. No advertising and no outside analytics. - Everyone gets free builds every month, to use in any of their groups. A small tweak is free, a new feature is 1 build, and a whole new look or a game is 2; ready-made pieces are free. Groups can buy packs of builds together; nothing renews. - The AI models are Anthropic's Claude. ## Pages - [Jigsaw](https://jigsawapps.com/): The group chat that builds itself: every group's chat is its own app, changed by an AI agent when the group asks. - [What Jigsaw Hosting is](https://jigsawapps.com/hosting): What it does, how it works and the two kinds of app. - [Pricing](https://jigsawapps.com/pricing): Plans, limits and what each one costs. - [How Jigsaw Hosting compares](https://jigsawapps.com/compare): When to use Jigsaw Hosting and when something else fits better. - [For AI agents](https://jigsawapps.com/agents): How an agent connects, builds and publishes. - [Jigsaw privacy policy](https://jigsawapps.com/privacy): What Jigsaw collects and how its AI agents use it. - [Jigsaw terms](https://jigsawapps.com/terms): The rules for using Jigsaw. - [Jigsaw Hosting privacy policy](https://jigsawapps.com/hosting/privacy): What is collected and who processes it. - [Jigsaw Hosting terms of service](https://jigsawapps.com/hosting/terms): The rules for using Jigsaw Hosting. - [Acceptable use](https://jigsawapps.com/acceptable-use): What may not be built or published, on Jigsaw and Jigsaw Hosting. ## Jigsaw Hosting > Jigsaw Hosting is a cloud for small software. An AI agent, or a person with a zip file, publishes a small web app. Jigsaw Hosting hosts it at its own address, signs every visitor in, and lets the owner share it by email with viewer and editor roles, the way you share a doc. Jigsaw Hosting is for individuals and small teams who build small apps with AI agents and want specific people to use them, without writing sign-in, permissions, a database or key handling. - Site: https://jigsawapps.com. Each published app gets its own address: https://.onjigsaw.app. - Every app is private. Only the owner and the people they add by email can open it. There are no public links. - Roles: owner, editor, viewer. Jigsaw Hosting signs each visitor in and tells the app who they are, so apps contain no login code. - Two kinds of app. A page: static files that use Jigsaw Hosting's built-in data API and key proxy. An app with its own server: a Node app in its own machine, asleep when idle, with its own disk. - Agents publish through a remote MCP server at https://jigsawapps.com/mcp, or the HTTP API at https://jigsawapps.com/api/publish. People can upload a zip. - Secret API keys are pasted by the owner, stored encrypted, and added by Jigsaw Hosting on the server side. They never reach the browser. - Teams: a team owns its apps, so they stay when a person leaves. Admins and builders manage them; one bill for the team. - Pricing: Free: 3 page apps, each shared with up to 5 people. Individual: $9 a month or $90 a year, for 10 apps (up to 3 with their own server), each shared with up to 25 people. Team: $19 a month for each builder, for apps the team owns together. Prices include tax. The people an app is shared with never pay. ### For agents - [Build and publish an app for Jigsaw Hosting](https://jigsawapps.com/llms-full.txt): the complete guide, including the data API, the key proxy and the rules for apps with their own server - [Connecting an agent](https://jigsawapps.com/agents): the MCP address, signing in, and the HTTP API ## Optional - [Report an app](https://jigsawapps.com/report): tell Jigsaw Hosting about an app that breaks the rules - [Feedback](https://jigsawapps.com/feedback): tell Jigsaw Hosting what is missing