Migration guide · Internal tools & admin panels

The 5 best Retool alternatives

Retool builds the internal screens nobody wants to hand-code — admin panels, support dashboards, refund tools, data browsers. You drag components onto a canvas, wire them to a query, and ship in an afternoon what would otherwise be a fortnight of CRUD work. It is genuinely good at this, which is why the pricing works.

Bottom line

Appsmith is the closest like-for-like and the first thing to try. ToolJet is the pick if AGPL and a lighter footprint suit you better. Either way, the honest saving is not licence cost — it is that the tools you build stay yours.

Jump to the full comparison →

The cost

Free for up to five users. Team runs around $10 per standard user and $50 per builder per month; Business is roughly $50 per user with builders higher again. The mechanic that surprises people is the builder-versus-viewer split — anyone who edits an app costs several times what a viewer does, and internal tools have a way of accumulating editors. Self-hosted deployment exists on higher tiers and does not remove the per-user licence. Figures checked 2026-08-07.

Why people consider an alternative

Per-builder pricing punishes the exact behaviour that makes internal tools valuable — more people building small tools for themselves. A team that internalises Retool properly finds its bill rises with adoption rather than with usage. The second reason is that internal tools accumulate: what starts as one admin panel becomes thirty, all living inside a vendor's canvas with no meaningful export. The third is data residency, since Retool's cloud sits between your staff and your production database.

When Retool is still the right call

Stay inside the free tier — five users covers a lot of small teams and nothing here beats free and already working. Stay if the integration breadth is doing the work: Retool connects to more databases, APIs and SaaS products out of the box than any alternative, and rebuilding that plumbing is not free. Stay if your tools are business-critical and audited, because Retool's permissions, audit logs and SOC 2 posture are ahead of the open options. And stay if you have no platform team, since every alternative here is a service you now run.

The verdict — at a glance

ranked by Sovereignty Score — how we score →

Alternative	License	Self-host	Pricing	Sovereignty
Appsmith★	Apache-2.0 (core; some enterprise features are commercial)	Yes	Free and open source to self-host. Paid cloud and enterprise tiers.	90
Refine	MIT	Yes	Free and open source. It is a library — you host the app like any other.	96
ToolJet	AGPL-3.0 (core; enterprise edition is commercial)	Yes	Free and open source to self-host. Paid cloud and enterprise editions.	89
Windmill	AGPL-3.0 (core; enterprise edition is commercial)	Yes	Free and open source to self-host. Paid cloud and enterprise editions.	88
Budibase	GPL-3.0 (core; enterprise tier is commercial)	Yes	Free and open source to self-host. Paid cloud and enterprise plans.	87

Macrostack's top pick

Appsmith

The closest open equivalent — drag, drop, connect, self-host.

Which one fits your situation?

There is no single best answer — it depends on what you are actually trying to do.

Just tell me the best Retool alternative

Appsmith90

Our top pick — the highest Sovereignty Score at 90, and the one we would choose ourselves.

Appsmith vs Refine →

I have no budget — is there a genuinely free one?

Refine96

Open source under MIT. Free and open source. It is a library — you host the app like any other.

Refine vs Appsmith →

I want to self-host it and own the data

ToolJet89

Self-hostable, so your data stays on your own server. Free and open source to self-host. Paid cloud and enterprise editions.

ToolJet vs Appsmith →

It is just me — I do not want to run a server

Windmill88

Offers a hosted option, so you can start without infrastructure. Free and open source to self-host. Paid cloud and enterprise editions.

Windmill vs Appsmith →

Every alternative, compared

#1★ TOP PICK

Appsmith

The closest open equivalent — drag, drop, connect, self-host.

OPEN SOURCEApache-2.0 (core; some enterprise features are commercial)SELF-HOSTLOCAL-FIRST

Appsmith is the most direct open replacement for Retool: a drag-and-drop builder with widgets, JavaScript anywhere, and connectors for the major databases and APIs. It self-hosts with Docker or Kubernetes and the core is Apache-2.0, which is the most permissive licence of the serious options here. Around 40.6k stars. If your reason for reading this page is per-builder pricing, this is the first thing to try, and the conceptual jump from Retool is small enough that an existing Retool user is productive quickly.

Strengths

+Closest feature match to Retool of anything open
+Apache-2.0 core — the most permissive licence among serious options
+Self-hosts on Docker or Kubernetes with no per-builder fee
+Large widget library and broad database connector support

Trade-offs

−Some governance and SSO features sit behind the paid tier
−Fewer third-party integrations than Retool out of the box
−You now operate a service, including upgrades and backups
−Polish trails Retool in places, particularly complex state

Free and open source to self-host. Paid cloud and enterprise tiers.

Website Source Docs

Refine

Not a builder — a React framework, when you would rather own the code.

OPEN SOURCEMITSELF-HOSTLOCAL-FIRST

Refine is a React meta-framework for building internal tools and admin panels in code: it handles data fetching, auth, routing, forms and tables, and leaves the interface to you and your component library of choice. There is no canvas and no vendor format — the output is a React application in your repository, which means it cannot be locked in by definition. MIT. It is the right answer when the objection to Retool is ownership rather than price, and when you have engineers who would rather write React than learn a builder.

Strengths

+The output is your own React code — no vendor format at all
+MIT, no enterprise tier, nothing gated
+Works with Material UI, Ant Design, Chakra or your own components
+Handles the boring parts: auth, data, forms, tables

Trade-offs

−Not low-code — this is a framework for engineers
−Non-technical staff cannot build with it
−Slower to a first working screen than any builder here
−You own every design decision, which is freedom and work

Free and open source. It is a library — you host the app like any other.

Website Source Docs

ToolJet

Lighter than Appsmith, AGPL, and quick to stand up.

OPEN SOURCEAGPL-3.0 (core; enterprise edition is commercial)SELF-HOSTLOCAL-FIRST

ToolJet is a low-code builder for internal tools with a visual app designer, around fifty data-source connectors, and a notably light deployment — it will run comfortably on hardware you would consider too small for Appsmith. AGPL-3.0 with roughly 38.3k stars. The licence is the thing to read carefully: AGPL is strong copyleft, which matters if you intend to modify it and offer it as a service to others. For ordinary internal use it changes nothing at all.

Strengths

+Lightest deployment of the serious options — small servers are fine
+Around fifty data-source connectors built in
+Clean, fast app designer
+Active development and a responsive community

Trade-offs

−AGPL-3.0 strong copyleft — read it before modifying and redistributing
−Smaller community than Appsmith
−Enterprise features including SSO are commercial
−Fewer worked examples for complex applications

Free and open source to self-host. Paid cloud and enterprise editions.

Website Source Docs

Windmill

For teams whose internal tools are mostly scripts and workflows.

OPEN SOURCEAGPL-3.0 (core; enterprise edition is commercial)SELF-HOSTLOCAL-FIRST

Windmill takes the opposite approach to a drag-and-drop canvas: you write scripts in Python, TypeScript, Go or Bash and Windmill generates the UI from their inputs, alongside a workflow engine for chaining them. For an engineering team whose internal tooling is fundamentally automation with a form on top — reruns, backfills, ops jobs — that is a much better fit than a widget canvas. AGPL-3.0 core with a commercial enterprise edition. Roughly 17.5k stars, and unusually fast because the execution engine is Rust.

Strengths

+Script-first: the UI is generated from code you already write
+Serious workflow engine, not an afterthought
+Rust execution engine — genuinely fast
+Fits engineering teams better than a drag-and-drop canvas

Trade-offs

−Wrong shape if you want non-engineers building tools
−AGPL-3.0 strong copyleft
−Smaller community than Appsmith or ToolJet
−UI generation is less flexible than hand-placed widgets

Free and open source to self-host. Paid cloud and enterprise editions.

Website Source Docs

Budibase

Brings its own database, so a tool can exist before the data does.

OPEN SOURCEGPL-3.0 (core; enterprise tier is commercial)SELF-HOSTLOCAL-FIRST

Budibase differs from the others in a way that matters more than it sounds: it includes an internal database, so you can build a working tool before you have a backend to point it at. That makes it the fastest option for the common case of a team that needs a form, a table and some approvals — not a dashboard over an existing production database. It also connects to external sources when you have them. GPL-3.0 core with a commercial enterprise tier, around 28k stars.

Strengths

+Built-in database — build a tool without wiring a backend first
+Strong automations and form handling
+Self-hosts easily on Docker or Kubernetes
+Good fit for approvals and internal workflows rather than dashboards

Trade-offs

−Weaker than Appsmith or Retool for complex data applications
−GPL-3.0 copyleft is worth reading before you modify it
−Enterprise features behind the paid tier
−Smaller connector library than the alternatives

Free and open source to self-host. Paid cloud and enterprise plans.

Website Source Docs

Questions people ask

▸ Why does Retool get expensive?

Because it charges per builder, and builders multiply. Standard users run around $10 a month while builders are roughly $50 — so the more successfully your team adopts it, the faster the bill rises. Self-hosting is available on higher tiers but does not remove the per-user licence.

▸ What is the best open-source Retool alternative?

Appsmith for most teams: closest feature match, Apache-2.0 core, self-hostable, and a small conceptual jump from Retool. ToolJet if you want a lighter deployment and AGPL suits you. Refine if the objection is ownership rather than cost and you would rather write React.

▸ How hard is it to migrate off Retool?

Harder than most categories, because there is no meaningful export. Queries and SQL move; the applications do not — they exist in Retool's internal format and have to be rebuilt. The switching cost is proportional to how many tools you have built, which is why it is worth deciding early.

Compare them head-to-head

Appsmith vs Refine→Appsmith vs ToolJet→Appsmith vs Windmill→Appsmith vs Budibase→Refine vs ToolJet→Refine vs Windmill→Refine vs Budibase→ToolJet vs Windmill→ToolJet vs Budibase→Windmill vs Budibase→

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Entry last verified 2026-08-07. Licenses and pricing change — spotted something out of date? That's a correction we want.

The cost

Why people consider an alternative

When Retool is still the right call

The verdict — at a glance

Appsmith

Which one fits your situation?

Every alternative, compared

Appsmith

Strengths

Trade-offs

Refine

Strengths

Trade-offs

ToolJet

Strengths

Trade-offs

Windmill

Strengths

Trade-offs

Budibase

Strengths

Trade-offs

Questions people ask

Compare them head-to-head

Related comparisons

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