Windmill vs Replit
Eight questions teams ask when choosing where business teams build internal software with AI, with an honest answer on each one.
- 01What you can buildWhich solution fits for your specific use case
- 02TargetWho the platform is built for
- 03Build experienceHow you build on each platform
- 04IntegrationsHow the platform integrates with your existing stack
- 05Migration & lock-inHow hard to get in, how hard to get out
- 06Enterprise requirementsReview, audit logs, security, where code runs
- 07Licensing & pricingOpen source, pricing, self-hosting
- 08VerdictThe verdict
Windmill in one sentenceAn open-source, self-hostable code-first platform for workflows, apps and AI agents, where business teams build with AI and engineers review, promote and run what ships on their own infrastructure, alongside scripts, workflows and data pipelines written in code.
Replit in one sentenceA managed, proprietary platform to build and host apps with an AI agent: describe an app, Replit Agent writes it, and it runs on Replit's infrastructure with a built-in database, connectors and enterprise controls for teams across the company.
Which internal software can you build and orchestrate?
Windmill centralizes scripts, workflows, data pipelines, full-code apps, AI agents and operator UIs on a single runtime, with shared resources, auth and observability. Replit builds and hosts complete web apps from a prompt, with a database, connectors and deployments. Strong for standalone apps. There is no workflow engine, so multi-step automations, pipelines and agents live inside each app's own code.
| Primitive | Windmill | Replit |
|---|---|---|
Describe an internal tool and let AI build the frontend, backend and data access | ||
Custom dashboards and admin tools built in React or Svelte | ||
Chain steps into flows with branching, retries, suspends and approval steps | ||
Standalone functions exposed as APIs, webhooks or cron jobs with an auto-generated UI | As full apps | |
ETL, syncs and scheduled data jobs with parallel branches | Partial | |
Agents that call tools, branch on outputs and run as workflow steps | In app code | |
Cron jobs with retries, error handling and alerting | ||
Kafka, Postgres CDC, SQS, MQTT, NATS, email and webhook triggers on any runnable | Webhooks in app code |
Who is each platform built for?
Windmill puts business teams and engineers on one platform engineers control, so AI-built software runs next to engineered workflows under the same review. Replit is built for anyone in the company to create apps with its agent, with IT setting guardrails centrally.
WindmillReplitPrimary audience
WindmillEngineering and platform teams who run internal software in production, and the business teams who build on the same platform with AI. Engineers own the platform: code, Git, local dev, review, workers and infrastructure.
ReplitAnyone who wants to turn an idea into a working app. Replit's enterprise offering targets product, design, operations, marketing, sales, finance, HR, legal, data and IT teams, with central IT setting policies and security defaults.
How business teams and engineers work together
WindmillIn the same workspaces. Business teams build in AI sessions in the UI, engineers write code locally and sync it with Git, and both go through the same fork, review and promotion flow. What the AI builds can call the scripts and flows engineers already maintain.
ReplitReplit describes a three-lane model: prototypes are self-service, internal tools get light review, and production apps are co-built with engineering. Engineers can export an app's code to GitHub and continue in VS Code or Cursor.
How do you build on each platform?
Both build apps from a prompt. Replit Agent is the more polished way to go from an idea to a standalone app. Windmill builds with AI inside the workspace engineers already run, so the result is versioned, reviewable and works the same from the UI or a local IDE.
WindmillReplitBuilding with AI
WindmillAI sessions build scripts, flows and full-code apps from a prompt, with a live preview, plan mode and a diff of every change. Each session can run in its own workspace fork. Skills, MCP servers and instructions are scoped by folder and workspace.
ReplitReplit Agent builds full-stack apps from a prompt, with plan mode, parallel agents on Pro, automatic checkpoints you can roll back to, and organization-wide templates and skills on Enterprise. This is Replit's core product and it is polished for building an app from a blank page.
Local dev & IDE
WindmillEngineers work locally with the CLI, the VS Code extension and coding agents such as Claude Code against real source files, and sync the workspace with Git. Scripts, flows and apps are files in the repo.
ReplitDevelopment happens in Replit's web, desktop or mobile workspace. Code can be exported to GitHub, Azure DevOps or a zip, with VS Code and Cursor integrations, and the Git pane supports branches and GitHub sync.
Language runtimes
WindmillTypeScript (Bun, Deno, Node.js), Python, Go, Bash, SQL, PowerShell, PHP, Rust, C#, Java and more, with automatic dependency resolution per script.
ReplitWhatever stack the app needs: the agent writes a full project with its own dependencies, which Replit installs and runs.
Git & CI
WindmillScripts, flows, apps, resources, schedules and permissions are files in Git, deployed with the CLI and Git sync Enterprise only beyond 2 users, with pull requests and CI tests.
ReplitCheckpoints are stored in Git and can sync to GitHub. Replit's docs do not describe pull request review or CI as part of publishing.
How does the platform integrate with your existing stack?
Replit ships a large catalog of managed connectors. Windmill runs in your network, so private systems are reachable without exposing them, and any package ecosystem is the integration catalog.
WindmillReplitConnecting out
WindmillAny npm, PyPI, Go or Maven package is a first-class import, and typed resources hold credentials for databases and SaaS, scoped by folder. The AI uses the resources the person building can read, and can call MCP servers you connect.
ReplitHundreds of first-party connectors (Salesforce, Snowflake, Databricks and more), configured at the organization level on Enterprise, plus MCP servers for internal APIs. Replit documents that data access is scoped per app, with no cross-app access unless opted in.
Receiving events
WindmillNative triggers for HTTP, schedules, Kafka, Postgres CDC, SQS, MQTT, NATS, email and WebSocket, attachable to any script or flow without glue code.
ReplitApps receive webhooks through their own endpoints, and scheduled deployments run jobs on a schedule. Other event sources are handled in the app's code.
Network access
WindmillWorkers run in your network, so they reach private databases and internal APIs directly, and worker groups can sit in different networks per environment.
ReplitEnterprise offers single-tenant and private networking options, and Bring Your Own Cloud (early access and private preview) runs published apps or parts of the platform in your cloud tenant.
How hard to get in, and how hard to get out?
Lock-in is low on both sides for code. Replit apps export as standard projects, and Windmill workspaces export as plain files. The hosting and managed services are what you replace when leaving either.
WindmillReplitGetting in
WindmillExisting scripts and SQL paste into the script editor and get a UI and an API. An app exported from Replit can become a full-code app, with its backend endpoints rewritten as scripts.
ReplitFast for new apps: a prompt and an account. Existing GitHub repositories can be imported as Replit apps.
Getting out
WindmillScripts are standard code and the CLI exports the whole workspace as plain files. What you leave behind is the runtime, not your code.
ReplitApp code is standard and exportable to GitHub, Azure DevOps or a zip, and image exports (early access) produce a Docker image and Terraform file. Deployments, the built-in database and connectors need replacing.
Review, audit logs, security and where code runs
Both cover SSO, SCIM, audit logs and SOC 2 on their enterprise tiers. Windmill adds mandatory review and promotion between environments, and runs code and models where you choose. Replit relies on publishing permissions and automated scanning, on Replit-managed infrastructure.
WindmillReplitReview before production
WindmillProtection rulesets Enterprise only block direct deployment, so changes built in a fork or dev workspace reach production only when an engineer reviews the diff and deploys it, or merges a Git pull request.
ReplitPublishing is gated by a per-app Publisher permission, and a security agent scans apps before publish. Replit describes its enterprise model as letting teams build without a per-app review queue.
Environments
WindmillDev and prod workspaces with their own credentials and API keys, promoted through Compare & Deploy or Git. Workspace-specific values are never overwritten by a promotion.
ReplitForkable databases via snapshots keep development and production data apart, and apps have development URLs before publishing.
Where code and models run
WindmillEverything runs on your infrastructure, on workers you assign per team or environment, with process isolation available. The AI calls the model providers you configure, including local models.
ReplitApps run on Replit-managed infrastructure in isolated sandboxes, with a dedicated GCP project and single-tenant options on Enterprise. Agent model inference stays with Replit, including under Bring Your Own Cloud.
Audit logs & access
WindmillWorkspace roles, folder permissions and SSO for up to 10 users on every edition. Full audit logs, SAML, SCIM and custom roles are Enterprise only. SOC 2 Type II.
ReplitRoles on every plan, with custom groups, SAML or OIDC SSO, SCIM and audit logs Enterprise only. SOC 2 Type II attested.
Open source, pricing, and self-hosting?
Windmill is open source and self-hostable without a sales conversation. Replit is a managed product priced per plan with AI usage credits, with cloud-tenant options for enterprises.
WindmillReplitLicense & self-hosting
WindmillAGPLv3 core, free to self-host with Docker or Kubernetes. Enterprise features ship in a separate proprietary codebase. Managed cloud also available.
ReplitProprietary and managed. Bring Your Own Cloud is in private preview for enterprises and is documented as not an entirely self-hosted installation: the control plane stays with Replit.
Pricing
WindmillFree self-hosted with up to 10 SSO users and 3 workspaces. Enterprise is priced per seat and compute, published on the pricing page. Members who only run what others built count as half a seat.
ReplitCore at $20/month ($18 billed annually) and Pro at $100/month ($90 billed annually) for up to 15 collaborators, each including credits towards AI models. Enterprise is custom pricing.
The verdict
Replit and Windmill both let people across a company build software with AI. Replit is a managed product built around its agent: the fastest path from an idea to a hosted app, with enterprise controls set centrally and publishing gated by permissions and automated scanning.
Windmill is built for the case where that software has to live next to production systems. Business teams build in the same workspaces as engineers, changes are reviewed and promoted between environments, and everything runs on your own infrastructure with the models you choose. The same platform runs the workflows, data pipelines and AI agents engineers write in code, so what business teams build can reuse them instead of re-implementing them in each app.
If your teams mostly need standalone apps and a managed service is acceptable, Replit gets them there quickly. If the apps must reach private systems, go through review, or run on infrastructure you control, Windmill is built for that. The fastest way to judge is to spend an afternoon in each.
Frequently asked questions
Build your internal platform on Windmill
Scripts, flows, apps, and infrastructure in one place.