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Retool

Free tier

Build internal software better, with AI — fast, secure, and enterprise-ready.

Free tier available·All audiences·API available

Key strengths

AI-powered app generation (AppGen) with enterprise governance built inConnects to databases, warehouses, and APIs with no rebuild requiredSelf-hosting support for strict security and compliance requirementsEnd-to-end platform: build, launch, scale, and govern internal toolsTrusted by 10,000+ teams with documented ROI (e.g., Ramp saved $8M, DoorDash saved $6M)
Free tier + paid plans
San Francisco, USA
Founded 2017
Self-hostable
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Retool is a low-code/AI-assisted development platform that exposes a drag-and-drop app builder, a workflow/automation engine, a managed database, and an AI agent framework — all on a unified governed runtime. Apps connect natively to SQL/NoSQL databases, REST/GraphQL APIs, and cloud data warehouses, with write-back support. The platform offers self-hosting via Docker/Kubernetes for air-gapped or compliance-sensitive deployments, SSO/SCIM, role-based access control (RBAC), and audit logs. AppGen uses LLM-based code generation to produce Retool apps from natural language prompts, while AI Primitives allow developers to embed vector search, LLM calls, and agent workflows directly into custom apps.