tiun.
TIUN AG · Coding · Business
tiun is an AI-native backend for SaaS and AI companies that combines authentication, payments, a customer database, and analytics in one platform. Instead of wiring Stripe, Auth0, and a tax service together, you install the tiun skills and connect the MCP server. Then your AI coding agent sets up auth, billing, and entitlements inside your repo. That's the whole workflow. It also acts as your Merchant of Record, so it handles tax compliance, chargebacks, and monthly payouts for you. No tax forms. No payout chasing. It's aimed at solo builders and small teams who'd rather ship product than babysit a four-tool stack.
About tiun.
What Is tiun
tiun is the commercial backend for the AI engineering era. It packages the boring parts of running a paid software product into one system designed to work together from the start. Sign-up, login, SaaS billing, a customer database, and analytics all live in the same place. The company behind tiun is TIUN AG, based in Zurich. The product is hosted in Europe and follows GDPR rules.
The problem it goes after is hidden complexity. Most teams assemble an auth provider, a payment processor, a customer database, and an analytics tool. Then they spend weeks writing webhook handlers and reconciliation jobs just to keep those systems in sync. That's a lot of upkeep. tiun removes the glue work by owning the whole chain, so there's no webhook logic and no business logic to maintain.
The main limitation is fit. tiun works best when you're building a new product on its stack, because it's meant to replace your tools rather than sit beside them. Teams with a deep Stripe setup and custom tax handling will have to weigh a migration. And if you only need one piece, say just authentication, a single-purpose tool may be simpler.
Getting Started
- Create a free account at my.tiun.business to get access to the dashboard.
- Install the tiun skills with
npx skills add https://mcp.tiun.business, then authorize the MCP connection in your AI coding agent. - Let the agent wire up authentication, billing plans, and entitlements inside your codebase, or use the manual path with
npm install @tiun/sdk. - Drop in the prebuilt checkout, login, and self-serve portal components, which render as overlays so users never leave your page.
- Create your products and pricing models, then go live and track subscriptions and revenue from the customer database.
Product Information
A quick look at tiun.'s pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Solo builders
- Small SaaS teams
- AI-first developers
Tasks
- Setting up authentication
- Billing and subscriptions
- Monitoring customers
Scenarios
- Launching a paid AI side project and needing billing plus tax handling without becoming a tax expert.
- Selling software internationally and wanting VAT and sales tax collected automatically.
- Migrating a growing product off a stack of separate auth, payment, and analytics tools.
Key features
Authentication Out of the Box
tiun ships sign-up, login, and logout flows that work without custom code, along with a user button and profile component so people can manage their account from a dropdown. It supports social SSO, plus multifactor authentication through SMS passcodes and email. That covers the basics. For builders, the security plumbing that usually eats a week is already handled.
Payments and Billing Without Webhooks
You can create products and billing plans and accept one-time payments, subscriptions, and usage-based billing from the start. Checkout components drop in as overlays, so buyers never leave your page mid-purchase. No redirects. No broken checkout flows. The pitch is simple: no payment code to write, and no webhooks to wrangle as your pricing changes, which matters a lot once you start running experiments on subscription tiers and usage limits.
Merchant of Record
tiun processes payments, acts as your Merchant of Record, and pays you out monthly. That means it's the legal seller to your customer and absorbs the back-office of international software sales. It collects and remits VAT, GST, and sales tax, handles EU B2B reverse charge, calculates tax at checkout, and issues compliant invoices. You get net revenue and never deal with tax authorities yourself.
Unified Customer Database
Every user, transaction, and subscription session lives in one place, so there's no syncing between tools. Customer data, subscription state, SaaS billing records, and entitlements are all queryable through a single SDK. If a customer emails asking why they lost access, you can answer with one query instead of three dashboards.
MCP and Skills Integration
tiun is built for AI coding agents. Installing the skills and connecting the MCP server lets your agent read tiun's API as native context and wire up auth, billing, and entitlements directly in your codebase. It works with Cursor, Claude Code, Copilot, Codex, and 40+ other agents, and a manual npm path exists if you prefer to write the integration yourself.
Session and Event Tracking
The platform tracks sessions and events, feeding a basic analytics dashboard so you can see how customers actually use your product. An AI-native analytics add-on is available at $17/mo for teams that want deeper insight without bolting on a separate tool.
Pros and cons
Pros
- One system replaces the auth provider, payment processor, customer database, and analytics tool you'd otherwise wire together.
- Merchant of Record handling removes tax compliance, chargebacks, and payout logistics from your plate.
- Integration through skills and MCP fits teams already using AI coding agents, cutting setup time.
- Transparent pricing with no platform fee and no international card surcharge or FX margin.
- Hosted in Europe and GDPR compliant, which matters if you sell to European customers.
Cons
- It's designed to replace your stack, not sit alongside it, so adopting it on an existing custom setup means a migration.
- The free plan covers the platform, but real costs ride on transaction volume, so heavy sellers should model the percentage fees before committing.
- Payouts are monthly with a $200 minimum, which isn't ideal if you need faster access to revenue.
Frequently asked questions
It's a backend that handles authentication, payments, a customer database, and analytics for SaaS and AI products. You use it instead of stitching together an auth tool, a payment processor, and a separate analytics service. The point is to remove the sync work between those systems. So who needs it? Mostly small teams that don't want to maintain that glue code themselves.
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