tiun.

tiun. is the AI-native backend for builders, positioned as one system for authentication, payments, a customer database, and analytics. According to the website, tiun gives AI and SaaS companies the backend they need to ship, scale, and grow their business in one unified platform. Rather than assembling a stack of separate services, teams get a single place where user accounts, billing, transactions, and product usage data live together. The product describes itself as the backend powering the AI engineering era, built from an ecosystem of services that are designed to work together from the start. Its stated goal is to remove webhook logic and business logic that developers would otherwise have to write and maintain themselves, so a builder can launch a paid product the same day they start building. The problem tiun addresses is the hidden complexity created by single-purpose tools. When authentication, payments, customer data, and analytics each come from a different provider, teams end up juggling multiple accounts, scattered data, and costs that compound as they scale. Keeping those separate systems in sync requires maintaining business logic purely for the sake of consistency, and that maintenance burden grows alongside the business. The website notes that this fragmentation also makes the insights a company needs harder to reach, because the information required to understand customers, usage, and revenue sits in disconnected places. tiun's answer is an ecosystem of services designed to work together from the start, so there is no webhook logic and no business logic to handle just to keep tools aligned. The way to adopt tiun is described as installing its skills, connecting its MCP endpoint, and letting an AI agent do the hard work. The site provides a single command — npx skills add https://mcp.tiun.business — and links to documentation at docs.tiun.io. This integration path is highlighted by customers on the page: one founding member at Braintonic comments that it worked so well there was no backend, no webhooks, and no custom logic, while a founder describes integrating it for a side project as working like a charm and an absolute no brainer for future solo builders and founders. The significance of this approach is that it shifts setup work away from manual backend engineering and toward an agent-driven installation flow, which lowers the barrier for builders who want working infrastructure without writing and maintaining the usual glue code. tiun's authentication section aims to provide everything needed for user authentication. Sign up, login, and logout are ready to use out of the box, and the platform describes them as simple and secure. Beyond those basics, tiun supplies a User Button and User Profile, giving users a dropdown menu where they can access their account and manage their profile and security settings. Multifactor authentication is included, with SMS passcodes, email, and social SSO listed as supported methods. For a builder, this means the account layer that normally requires careful implementation — credential handling, profile management, and stronger sign-in options — is available as pre-built functionality rather than something to design from scratch. Payments are handled without the need to write payment code or wrangle webhooks. With tiun, builders can create products and billing plans and accept one-time payments, subscriptions, and usage-based billing from day one. Pre-built checkout components can be dropped in as an overlay, so users never leave the page during the purchase flow. tiun also acts as the Merchant of Record: it processes payments, pays out monthly, and includes tax compliance and chargebacks. The site states that this model brings better fees and more functionality, and its example pricing shows transaction fees of 2.9% + $0.30, for a total of roughly 3.4% + $0.30 on international transactions. The third part of the system is a customer database where every user, transaction, and session is stored in one place, with no syncing between tools. User management keeps customers' subscription status up to date and stored alongside their user data, removing the need to build or maintain complex synchronization logic. Advanced event and session tracking logs every login, purchase, and product interaction at profile level, so teams can understand how users move through the product. The same area covers transactional emails for key user actions such as confirmations, password resets, and purchases, invoice history that lets customers view and download receipts and invoices from their profile, and plan management so users can upgrade, downgrade, or cancel directly without a support ticket. Data APIs expose one queryable API built on a consistent model that stays in sync and is ready to plug into an existing stack. Analytics is presented as one system your entire team can work with, so the full picture is finally visible and actionable. All data lives in one place, letting business, engineering, product, and marketing see who is signing up, who is paying, how they use the product, where they get value, and how to price it. Because authentication, billing, and product events share the same underlying model, these questions can be answered from a single source instead of being stitched together across separate tools. The site illustrates the value with a case study: Res Publica reported a 21% increase in paying users and grew its user base by 21% in the last 12 months after introducing usage-based billing with tiun, as described by CEO Martin Stedler. Overall, tiun's approach is to treat authentication, payments, the customer database, and analytics as one connected system rather than four independent products. The website frames this as an ecosystem of services designed to work together from the start, which is why there is no webhook logic and no business logic to handle simply to keep systems in sync. Integration follows an AI-native path: install the skills, connect the MCP endpoint, and let an agent carry out the setup, with the command npx skills add https://mcp.tiun.business and documentation available for reference. Installation is described as one command, and the promise is that a builder can launch a paid product the same day they start building. The benefits follow directly from that consolidation. Teams avoid multiple accounts and scattered data, and they avoid the compounding costs that come with maintaining several single-purpose tools as they scale. Because subscription status, session activity, and transactions all sit with the user record, there is no synchronization logic to build or maintain. Customers can manage their own plans, invoices, and profiles, which reduces the need for support tickets. And because business, engineering, product, and marketing all read from the same data, the insights needed to understand signups, payments, usage, and pricing are reachable rather than buried in disconnected systems. tiun is aimed at AI and SaaS companies and the builders behind them, including solo founders and developers who want to launch a paid product quickly; commenters on the site describe using it for side projects. Typical scenarios reflect the product's shape: adding sign-up, login, and multifactor authentication to a new application; accepting one-time payments, subscriptions, or usage-based billing from day one; offering checkout as an overlay so users stay on the page; giving customers self-service control over plans, receipts, and invoices; and asking who is signing up, who is paying, and how to price the product from a single place. tiun can be tried for free, pricing details are published on its pricing page, and the platform is used through the web as well as its MCP and data APIs. tiun's core value proposition is consolidation: one system that supplies the authentication, payments, customer database, and AI analytics an AI or SaaS business needs, installed with one command and connected through MCP so an agent can do the heavy lifting. By removing webhook and synchronization logic and keeping every user, transaction, and session in one place, tiun promises to help builders ship, scale, and grow from a single backend — and start charging on day one.