Open-source Knack alternatives

Budibase is an open-source operations platform for building AI agents, automations and apps that run internal processes. It is model agnostic and describes itself as saving engineers many hours when building these tools, while handling security concerns. Topics place it in the low-code and no-code internal tools space, with CRUD apps and an SQL GUI.

The idea is to run requests, approvals and workflows on one platform instead of stitching several tools together. Staff constantly ask questions, request sign-offs and flag problems, and Budibase agents interpret those requests and carry out the work: creating records, sending approvals to the right people, updating apps and alerting teams. You connect the business systems your operations already rely on, and the platform also supports building data applications over databases and REST APIs.

You can use Budibase Cloud, where the vendor hosts it, or host it yourself with Docker, Kubernetes or DigitalOcean. The repository is written in TypeScript, and its license is listed as 'Other' on GitHub, so check the terms for enterprise features. It suits operations and engineering teams that want internal tools and AI automation without building everything from scratch.

NocoBase is an open-source platform that combines AI with no-code tooling to build business systems quickly. Rather than having AI generate everything from scratch, it has AI build on infrastructure already proven in production and on a visual WYSIWYG no-code editor, which the project says delivers both speed and reliability.

Its approach is collaborative: coding agents are given a complete CLI plus skills, and people use a visual interface, so both can contribute to the same system. Topics show typical uses such as internal tools, admin dashboards, CRUD apps, CRM, ERP and project management, with workflows included. An online demo, documentation, a forum and customer stories are available, and release notes are published on the blog with weekly summaries. It is written in TypeScript.

NocoBase can be installed on your own infrastructure, and its license is listed as 'Other' on GitHub, so review the terms for commercial or enterprise use. It suits teams that want flexible internal systems without maintaining a large custom codebase, and who want to use AI assistance on a stable foundation.

REI3 is a free and open low-code platform for building and hosting business applications with full control and ownership. It targets organizations that want to replace spreadsheet-based solutions with proper multi-user apps, run them in the cloud or on-premise, and avoid walled gardens and cloud-only SaaS. Created applications can be used, shared or even sold.

Applications can summarize records, do date calculations and apply business rules, show tasks on Gantt charts, diagrams and dense lists, and include workflows such as forms that change with a record's state, PDF export and notifications. Roles and access policies restrict access globally or per record, and built-in end-to-end encryption comes with key management. Integration options include serving and calling REST endpoints, CSV import and export and ICS calendar access. The platform also covers mobile use with PWA features, full-text search, input types such as signatures and bar or QR code scanning, password policies and brute-force protection.

REI3 is written in Go and JavaScript, uses multi-core processing and bi-directional data channels for speed, and has downloads, documentation, a live demo and a catalog of applications. Its license is listed as Other.

Totum is a small-code database for people who are not programmers. It is described as a hybrid of a database and a spreadsheet with a ready-made interface for desktop and mobile, a simple syntax for logic, automatic actions, access rules, logging and more. The aim is to let organizations build complex internal applications quickly, using the database itself as the interface. It runs on your own server, and this repository is the free MIT version of Totum PRO.

Tables, fields and settings are created and managed with the mouse, and development and operation happen in the same environment. Developers can hide the developer interface to see what users see, or switch to a particular user. Access is two-level, separating developers and users. The README lists example solutions such as production management, cadastre accounting, financial accounting, order management, stocks, CRM and equipment inventory. A documentation site and a training course aim to get you to a first working table in about thirty minutes.

Installation is a one-click native installer for a clean Ubuntu 24.04 system, which installs both the MIT and PRO versions. PRO works without a license when only the admin user exists, and a free PRO license for two additional users is available. The API is a PRO feature. The stack is PHP and PostgreSQL, with documentation in English, Russian, Spanish and German.