1. UI Bakery
Starts from $49/month, unlimited users
Free plan available

Pros:
Customizable Open Source UI library under the hood.
Unlimited number of developers and users you can have within one account.
25+ ready-made UI components: Tables, Charts, Forms, Buttons, and more.
Free ready-made dashboards and templates.
A Design System under the hood allowing you to match your internal tool with your brand.
Integration with databases, APIs, and third-party systems like MySQL, Google Sheets, PostgreSQL, HubSpot, Salesforce, and others.
Self-hosted version of UI Bakery for a better data security.
Automatic app deployment on the UI Bakery or a custom domain.
Cons:
Few templates for now.
No ability to build an app for mobile.