Avo

A Ruby on Rails admin panel framework you install into an existing app

Best for: Rails developers who want to add an admin panel to an existing app without building CRUD screens by hand.
Skip if: You're not building on Ruby on Rails, or you need advanced features (audit logs, multi-tenancy) that require the paid tiers.

Avo is a Rails admin panel framework that drops into any new or existing Rails app to generate CRUD interfaces for your models. It offers 30+ field types, table/grid/map/kanban views, Pundit-based authorization, audit logging, multi-tenancy support, Active Storage file uploads, global search, and REST API generation, with a free tier and paid Pro/Advanced tiers for more advanced features.

Pros

Drops into an existing Rails app rather than requiring a fresh project
Wide range of view types (table, grid, map, kanban) beyond typical CRUD tables
Multi-tenancy and audit logging available for larger internal tools
Backed by an established company (AvoHQ Inc., founded 2020) with ongoing development