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AgentsNewAI primitivesNewApp builderMobile appsWorkflowsDatabaseExternal appsSelf-hosting
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AI Primitives
App Builder
Mobile
Workflows
Database
External apps
Self-hosting
Illustration of Agents showing an abstract nature scene
AI Primitives

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EnterpriseStartupsAgencies

Discover

IntegrationsTemplatesUtilitiesBlogReads and reportsCustomer storiesVideosInteractive tour

Developers

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Build custom frontends on gRPC

With Retool you can build a frond end on top any data source. Join data across your Databases and APIs. Simplify internal workflows. Manage access to your app with granular permissions.

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Build custom frontends on gRPC
Retool understands your gRPC protos out-of-the-box

Retool understands your gRPC protos out-of-the-box

Connecting Retool to gRPC enables you to build user interfaces on your data fast. Our gRPC integration provides drop downs for all your services and their methods, along with templates for every request.

Connect to gRPC directly

Connect to gRPC directly

To build Retool apps with your gRPC data, mount your proto files onto your Retool on-premise deployment and let Retool handle the rest. Also, Retool allows you to communicate with your gRPC services across environments and choose from a variety of authentication strategies.

Build faster with 100+ drag and drop components

Build faster with 100+ drag and drop components

Retool's library of 100+ drag and drop components – think tables, buttons, text inputs, lets you build your front-end in no time. Connect components to requests to your gRPC data, and you've got yourself a working tool in no time.

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From startups to Fortune 500s, the world's most effective teams use Retool to build custom business software. Our customers

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Dean McRobie

CTO at CommonBond

Retool provides the building blocks for any internal tool

Whether you're building a basic CRUD interface or refund management software, internal tools have the same building blocks: tables, text boxes, dropdowns, etc. Retool gives you a simple way to connect these building blocks with your own data sources so you can assemble any custom internal tool, fast.

Try Retool today

Start building an internal tool or customer portal in under 10 minutes

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© Retool 2025