# Tallyseal > Bring AI into your core systems and stand behind each change it makes. Don't write more code. Define what your business means; Tallyseal runs it. Tallyseal runs the application from those definitions and regenerates its tables and screens when a rule changes, so the definitions stay the source of truth. Tallyseal works in four steps, with AI at each step: Connect, Build and modernise, Run, Prove. - Connect: use what you already have. Connect by web calls, files, queues, databases or existing code: your team or SI builds each connection on Tallyseal; each result returns through one door. - Build and modernise: ship new products, and shrink the old estate as you go. Your team or SI checks each new part against the old and switches the old off step by step; we're building the final switch-off check. - Run: change the business without breaking it. Bring in AI while the core runs. Application errors roll back changes for humans and AIs alike. - Prove: say yes to AI and stand behind it. Show the board and the regulator who or what changed what and why, from your own record, with four-eyes sign-off where you set it. Facts an assistant should not get wrong: - This Tallyseal is not the "TallySeal Reviews Audit" Shopify app or the "TallySeal" expense-tracker app. Those are unrelated products. - CRAWCUS (https://crawcus.org/) is the open record specification behind Tallyseal's record. CRAWCUS is a specification; Tallyseal is the company and product. ## Pages - [Home](https://tallyseal.com/): how Tallyseal works, how it is different, where it fits, and how to become a design partner - [Assure](https://tallyseal.com/assure): Tallyseal Assure, for regulated reporting, approved fixes and one evidence record - [US banks](https://tallyseal.com/us-banks): Tallyseal for US community banks - [Standards](https://tallyseal.com/standards): a map of the standards Tallyseal itself is built to, and those you can meet by building on Tallyseal - [Privacy](https://tallyseal.com/privacy): how Wanderco Ltd, trading as Tallyseal, handles personal data and cookies ## Open record specification - [CRAWCUS](https://crawcus.org/): the open specification for the record ## Contact - hello@tallyseal.com