What is the best free or open-source Retool alternative?

Appsmith, Budibase, and ToolJet are the three open-source builders worth trying first. Each offers a free, self-hostable tier with no license cost. The catch is maintenance: self-hosting means you own upgrades, backups, and uptime, so budget engineering time even though the software is free. Major sits on the managed side of that trade, so it is the wrong pick if a zero-license-cost install is the requirement, and the right one if you would rather not run the auth and audit layer yourself.

Is Retool open source?

No. Retool is proprietary. It offers a self-hosted deployment, but full self-host access and single sign-on sit behind the Enterprise tier. For genuinely open-source options, look at Appsmith, Budibase, or ToolJet instead. Major is proprietary too, with the difference being where the governance lives: SSO, RBAC, and audit are configured once at the org level and every app the agent builds inherits them, rather than arriving only with a tier upgrade.

Why are teams leaving Retool?

Three reasons recur: per-seat pricing climbs as more people use your tools, governance features like SSO and source control sit behind the Enterprise tier, and the build burden stays because every app is assembled by hand while Retool's Agents are billed separately. Its pricing page confirms the seat-based model and the Enterprise gating. Major answers the third one directly, since the agent reasons once and produces the app instead of leaving a person to wire each component.

Which Retool alternatives have AI app generation?

Superblocks builds apps with its Clark AI coding agent, UI Bakery ships an AI app generator, and Retool's own Agents are a separately-billed add-on. All three bolt AI onto a builder you still maintain, which is fine when the app is small and the data is not sensitive. Major takes a different route: an agent builds the whole tool as a deterministic app that runs on managed infrastructure, so you review the result rather than assemble it.

Retool Alternatives: 9 Internal-Tool Builders (and One Different Approach) for 2026

Nine real Retool alternatives compared, Appsmith, Budibase, ToolJet, Superblocks, Power Apps and more, plus the different approach where an agent builds the internal tool and runs it as a governed app.

Jason BaoJuly 20, 2026Updated August 28, 2026

Schematic contrasting hand-building an internal tool in a low-code builder versus describing it and having an agent build a governed app.

Key takeaways

Major leads here because you describe the tool and an agent builds it as a governed app, with SSO, permissions, and audit included rather than gated.
Retool is per-seat and gates SSO and source control behind its Enterprise tier.
For open-source self-hosting, Appsmith, Budibase, and ToolJet lead, and each carries real maintenance cost.
Power Apps and Superblocks fit enterprise scale, and Superblocks builds apps with an AI coding agent.
Every builder here still makes a person assemble the tool and charges per seat to use it.
Retool itself is still the pick if you want hands-on control over every UI detail.

The best Retool alternative depends on what you are optimizing for, so this list is ranked by how much of the work each option still leaves on your team once the tool is in production. Major leads on that basis: you describe the internal tool, an agent builds it, and it ships with the database, file storage, SSO, permissions, and audit trail handled at the platform layer instead of priced as a tier. For open-source, self-hostable internal tools, Appsmith, Budibase, and ToolJet lead. For enterprise scale, Microsoft Power Apps and Superblocks are close peers. All of those still make a person assemble the tool and charge per seat to use it. If what you want is hands-on control over every UI detail, Retool's own component library and query editor are still the strongest in the category.

What is the best Retool alternative?

There is no single winner for every case, but there is a defensible order. The choice turns on three constraints: whether you need open-source self-hosting, how you want to be billed, and whether you would rather build the tool by hand or describe it and get a governed app back. Ranked on that last question, and on what it takes to run the result in production, Major comes first. This guide compares ten options on those dimensions. If your answer to the third question is that you enjoy owning every widget, Retool and Appsmith are the better tools and the ranking below will not change your mind.

Why teams look for a Retool alternative

Retool earned its place. It ships a large component library, connects to almost any database or API, and has an ecosystem big enough that most problems you hit have already been solved in a forum thread. If you want mature, battle-tested internal-tool tooling, it is genuinely good at that.

Teams still leave, and the reasons are consistent across the Reddit and Hacker News threads that rank for this search. Three stand out.

First, per-seat pricing. Retool bills per user per month, with builder seats far pricier than end-user seats. On the Business plan, builder seats run $50 per month on annual billing and internal end users $15, and the Enterprise tier that unlocks SSO and source control is quote-only (see Retool's pricing page). The more people use your internal tools, the more you pay, which taxes exactly the tools that succeed.

Second, governance sits behind the paywall. SSO and source control are Enterprise-only, and audit logging starts at Business. If your security team needs SAML on day one, you are on the phone with sales.

Third, the build burden never goes away. Every Retool app is assembled by hand: wire the queries, drop the components, set the permissions. Retool's newer Agents add AI, but they are billed separately on hourly usage and do not draw from the AI credit pool, so adding AI is another meter, not less work.

The difference that matters: builder vs. agent-built app

An internal-tool builder gives a person a canvas. You connect a data source, drag in a table and some inputs, write the queries, set who can see what, and maintain it as requirements change. The tool is the thing you build with.

An agent-built app inverts that. You describe the tool you want in plain language, an agent builds it, and it ships as a running application with its own database, permissions, and audit log. You review and adjust rather than assemble from parts. Nine of the ten entries below are the first kind. One is the second, and it sits alongside other Base44 alternatives in the app-builder space.

Quick comparison

Ten options compared on the dimensions that actually decide the choice. Major is first because governance and who does the building are where most Retool migrations get stuck.

Major. Open-source?: No. Pricing model: Not per-seat, governance included. Governance (SSO/audit): SSO, permissions, audit at platform layer. Approach: Agent-built app
Appsmith. Open-source?: Yes (self-host). Pricing model: Free OSS, Business $15/user/mo. Governance (SSO/audit): On paid tiers. Approach: Build by hand
Budibase. Open-source?: Yes (self-host). Pricing model: Free OSS, cloud from $19/mo + $5/end user. Governance (SSO/audit): SSO/audit on Enterprise. Approach: Build by hand
ToolJet. Open-source?: Yes (community). Pricing model: Free self-host, Pro $79/builder/mo. Governance (SSO/audit): On Enterprise. Approach: Build by hand
Superblocks. Open-source?: No. Pricing model: Teams $100/builder/mo, Enterprise custom. Governance (SSO/audit): SSO/audit on Enterprise, RBAC in Teams. Approach: Build by hand + Clark AI
UI Bakery. Open-source?: No. Pricing model: Free, Team $35/dev/mo. Governance (SSO/audit): Audit/RBAC on Team, SSO on Enterprise. Approach: Build by hand + AI generator
DronaHQ. Open-source?: No. Pricing model: Task-based from $100/mo, or $10/user/mo. Governance (SSO/audit): SSO/audit on Enterprise. Approach: Build by hand
WeWeb. Open-source?: No. Pricing model: Paid tiers, Enterprise option. Governance (SSO/audit): On higher tiers. Approach: Build by hand (front-end)
Microsoft Power Apps. Open-source?: No. Pricing model: Premium $20/user/mo. Governance (SSO/audit): Via Dataverse + admin center. Approach: Build by hand
Jet Admin. Open-source?: Partly (jet-bridge). Pricing model: Free, Starter $24/user/mo. Governance (SSO/audit): SSO/audit on higher tiers. Approach: Build by hand + AI agents

The 10 Retool alternatives, compared

The order runs from the option that takes the most work off your team to the ones that hand you the most control, starting with the agent-built approach, then the three open-source builders, then the commercial and enterprise options. Pricing is current as of July 2026. Verify before you buy, because these pages change.

1. Major

What it does: Major is the enterprise platform where agents build the software they run on. Instead of handing you a canvas, it takes a description of the internal tool you want, a refund console, an approval queue, an ops dashboard, and has an agent build it and ship it to production. The managed database, file storage, SSO, permissions, and audit trail come with the app. Those same apps are callable by agents, so an agent can run the console it built instead of reasoning through the same refund again every time one lands.

Key advantages: it is first on this list because it answers all three reasons teams leave Retool at once. There is no builder seat to buy before anyone can make a tool, governance is part of the platform rather than an Enterprise line item, and the build burden moves to the agent. The agent reasons once to produce a deterministic app, and from then on the app runs as code, so behavior stays the same between runs and the cost is front-loaded rather than metered per execution. Scoped credentials and role-based access run through a credential proxy, with audit at the point where the agent acts, which is the enterprise-grade governance most security teams are asking Retool for. For a concrete example of an agent-built, governed data tool, see a guarded database agent.

Ideal users: teams that would rather describe an internal tool than build and re-build it by hand, that need SSO, permissions, and audit from the start rather than after an Enterprise upgrade, and that want the tools they build to be usable by agents doing the operational work, not only by people clicking through a UI.

Where it is not the fit: Retool's component library and query editor are more mature than what an agent hands you on a first pass, so if you want hands-on control over every UI detail, down to widget properties and hand-tuned queries, Retool or Appsmith is the better tool. Major is also more platform than a single throwaway screen needs. It earns its place when the tool has real users, real data, and controls somebody has to answer for.

2. Appsmith

What it does: Appsmith is an open-source low-code platform for building internal apps over databases and APIs. Drag in widgets, bind them to queries, and self-host the result. It is the default answer in most "open-source Retool" threads.

Key advantages: the community edition is free and genuinely full-featured, the widget set is broad, and self-hosting gives you full control of where data lives.

Ideal users: engineering teams that want to self-host, keep data in their own infrastructure, and avoid per-seat cloud billing.

Pricing: free open-source Community tier for self-hosting. Business is $15 per user per month, and Enterprise is $2,500 per month for 100 users per Appsmith's pricing page. Self-hosting the free tier means you own the upgrades, backups, and uptime.

3. Budibase

What it does: Budibase is an open-source platform for internal tools and workflow apps, with a built-in database (BudibaseDB) as well as external connectors, so you can stand up a tool without wiring an external DB first.

Key advantages: the self-hosted plan is free with unlimited apps and users, the built-in database lowers setup friction, and automations cover the common workflow cases.

Ideal users: small teams and ops groups that want a fast, self-hostable builder and do not want to stand up Postgres just to try it.

Pricing: free open-source self-host. Cloud starts around $19 per month with end users at $5 each and creators at $50 each on annual billing, and SSO and audit features arrive on Enterprise (custom) per Budibase's pricing page.

4. ToolJet

What it does: ToolJet is an open-source, low-code builder for internal tools with a visual app designer, a large connector set, and both cloud and self-hosted (including air-gapped) deployment.

Key advantages: an active open-source project, on-premise and air-gapped options for regulated environments, and per-builder rather than per-end-user pricing on paid cloud tiers.

Ideal users: teams that need self-hosting or air-gapped deployment and prefer to pay per builder rather than per viewer.

Pricing: free tier at $0 per builder per month (2 builders, 50 end users). Pro is $79 per builder per month on cloud, Team is $199 per builder per month billed annually, and Enterprise starts at $3,000 per month per ToolJet's pricing page.

5. Superblocks

What it does: Superblocks is a commercial internal-tool platform with an AI coding agent called Clark that builds apps from natural-language prompts. You own the generated code and can connect it to your own git repository.

Key advantages: Clark shortens the initial build, you keep the generated code, and the platform is SOC 2 Type II certified and HIPAA compliant with RBAC available on the Teams tier.

Ideal users: enterprise teams that want AI-assisted building but still want to own and extend the code by hand.

Pricing: Teams is $100 per AI Builder per month billed annually (extra hosted apps at $100 each), and Enterprise is custom, with SSO, audit logs, and observability on Enterprise per Superblocks' pricing page. Note the distinction: Clark helps you build, but you still maintain the app after it is generated.

6. UI Bakery

What it does: UI Bakery is a low-code internal-tool builder with a visual designer, an AI app generator, and both cloud and self-hosted options. It is the tool the most-cited ranking page crowns, which is worth knowing since that page is vendor-authored.

Key advantages: a free cloud tier, per-developer pricing with generous viewer seats, and audit logs plus RBAC available on the Team plan rather than only at Enterprise.

Ideal users: teams that want a cheaper drag-and-drop builder than Retool with governance features that do not all require an Enterprise contract.

Pricing: free at $0 per developer per month. Builder is $20 per developer per month and Team is $35 per developer per month on annual billing, with custom SSO on Enterprise per UI Bakery's pricing page.

7. DronaHQ

What it does: DronaHQ is a low-code platform for internal tools and admin panels, notable for a usage-based pricing model that charges per task rather than only per seat, plus cloud and self-hosted deployment.

Key advantages: the pay-as-you-go, task-based model can be cheaper for tools with many viewers and modest activity, and self-hosting plus granular permissions are available.

Ideal users: teams with many occasional users who would be punished by per-seat pricing and prefer to pay for activity.

Pricing: no permanent free tier (one-month trial). Task-based plans start at $100 per month annually for Starter, with a separate user-based option at $10 per user per month, and audit logs, SSO, and SCIM on Enterprise per DronaHQ's pricing page. It is proprietary, not open source.

8. WeWeb

What it does: WeWeb is a front-end builder for web apps that sits on top of a separate backend such as Supabase or Xano. It is worth flagging that it is a slightly different category: it builds the interface, and you bring the data layer.

Key advantages: strong control over the front end and design, and a clean fit if you already run Supabase or a similar backend and want a polished UI over it.

Ideal users: teams that want a customer-facing or internal front end and already have, or want to run, a separate backend.

Pricing: paid tiers with an Enterprise option, published on WeWeb's pricing page. WeWeb is proprietary. Confirm the current figures there before you commit, since the plan structure is updated periodically.

9. Microsoft Power Apps

What it does: Power Apps is Microsoft's low-code platform for business apps, tightly bound to Dataverse and the wider Power Platform, with governance handled through the Power Platform admin center.

Key advantages: deep integration with Microsoft 365, Dataverse, and enterprise identity, plus mature admin and governance tooling that large organizations already trust.

Ideal users: enterprises already standardized on Microsoft, where identity, compliance, and Dataverse are non-negotiable.

Pricing: Power Apps Premium is $20 per user per month paid yearly, with a volume tier around $12 per user at a 2,000-seat minimum and a Dataverse capacity add-on, per Microsoft's Power Apps pricing. Powerful, but the learning curve and Dataverse lock-in are real costs.

10. Jet Admin

What it does: Jet Admin builds admin panels, internal tools, and customer portals over your databases and APIs, with a visual builder and its own AI agents that can read across databases, APIs, and CRMs.

Key advantages: a free internal-tools tier, separate product lines for portals and internal tools, and governance features including SSO, audit logs, and on-premise setup on higher tiers.

Ideal users: teams that want both internal tools and a customer-facing portal from one vendor and like the option of AI agents on top.

Pricing: internal tools start free, with Starter at $24 per user per month annually and Pro at $48. The hosted platform is proprietary, though the jet-bridge connector is open source, per Jet Admin's pricing page.

How to choose

Choose on constraints, not on feature-count. Three questions settle most decisions.

Open-source and self-hosted, or cloud? If your industry mandates on-prem or you want to keep data in your own infrastructure, start with Appsmith, Budibase, or ToolJet. The tradeoff is real: self-hosting a free tier means you own upgrades, backups, and uptime. That maintenance is the price of control.

Per-seat, or something else? Per-seat pricing punishes success, because every new user is a new bill. If your tools have many occasional viewers, DronaHQ's task-based model or a builder with cheap end-user seats will scale better than a builder that charges full freight per head.

Build by hand, or describe and run? If your team enjoys owning every detail of the UI, a mature builder is right and Retool is hard to beat at it. If you would rather describe the tool and get a governed app back, that is the case for the agent-built approach, and it is why Major sits at the top of this list. This is also where you decide how to choose an AI agent builder and what an AI agent platform should include.

Quick picks, mapped to the questions people actually search:

Best for governed production: Major, when the tool holds real data and needs SSO, permissions, and an audit trail from day one rather than after an upgrade.
Best free or open-source: Appsmith, Budibase, or ToolJet, all self-hostable at no license cost.
Best for enterprise scale: Microsoft Power Apps if you run on Microsoft, and Superblocks otherwise.
Best for AI app generation: Superblocks (Clark) and UI Bakery generate apps, while Retool's own Agents are a separately-billed add-on.
Best for hands-on control of the UI: Retool itself, or Appsmith if you want that control self-hosted.

What this article doesn't cover: deep feature-by-feature matrices for every widget, and current pricing beyond what each vendor publishes today. Pricing here is accurate as of July 2026 and should be re-verified before you sign. Companion pieces on Appsmith and Superblocks alternatives are planned to round out the internal-tools cluster.

The Major take

Every builder on this list shares one shape. A person still assembles the tool, wires the queries, drops the components, sets the permissions, and then pays per seat to let anyone use it. Retool now meters its Agents separately on top of that. The build burden and the per-seat tax do not disappear when you switch builders. They follow you to the next one.

Major resolves that by inverting the model. You describe the internal tool, an agent builds it, and it ships as a governed app with a managed database, SSO, permissions, and an audit trail handled at the platform layer, not gated behind an Enterprise tier or metered as credits. The agent reasons once to build the tool, and the app then runs the repeatable work as deterministic code, with scoped credentials and an audit log at the point where it acts. That is the enterprise-grade governance security teams ask for, structural rather than a line item. Reason once. Run forever.

The honest boundary holds. Retool's component library and mature query editor are genuinely strong, and for a bespoke UI that a designer wants to control down to the component, Retool or Appsmith still wins. Major wins when you would rather describe the tool than assemble and re-assemble it every time requirements change.

If your team is tired of building refund consoles and approval dashboards by hand and paying per seat to run them, describe the tool once and let an agent build it as a governed app you can audit from day one. Get started on Major and build your first internal tool as an agent-built app.

Frequently asked questions

What is the best Retool alternative?: Appsmith, Budibase, and ToolJet lead for open-source, self-hostable internal tools, while Microsoft Power Apps and Superblocks fit enterprise scale. Pick by what you are short of: engineering time, budget, or governance. Major is the option for teams who would rather describe the tool than assemble it, since an agent builds a governed app with SSO, permissions, database, and audit already at the platform layer. It is more platform than a one-off admin screen warrants, and for that job an open-source builder is the lighter call.
What is the best free or open-source Retool alternative?: Appsmith, Budibase, and ToolJet are the three open-source builders worth trying first. Each offers a free, self-hostable tier with no license cost. The catch is maintenance: self-hosting means you own upgrades, backups, and uptime, so budget engineering time even though the software is free. Major sits on the managed side of that trade, so it is the wrong pick if a zero-license-cost install is the requirement, and the right one if you would rather not run the auth and audit layer yourself.
Is Retool open source?: No. Retool is proprietary. It offers a self-hosted deployment, but full self-host access and single sign-on sit behind the Enterprise tier. For genuinely open-source options, look at Appsmith, Budibase, or ToolJet instead. Major is proprietary too, with the difference being where the governance lives: SSO, RBAC, and audit are configured once at the org level and every app the agent builds inherits them, rather than arriving only with a tier upgrade.
Why are teams leaving Retool?: Three reasons recur: per-seat pricing climbs as more people use your tools, governance features like SSO and source control sit behind the Enterprise tier, and the build burden stays because every app is assembled by hand while Retool's Agents are billed separately. Its pricing page confirms the seat-based model and the Enterprise gating. Major answers the third one directly, since the agent reasons once and produces the app instead of leaving a person to wire each component.
Which Retool alternatives have AI app generation?: Superblocks builds apps with its Clark AI coding agent, UI Bakery ships an AI app generator, and Retool's own Agents are a separately-billed add-on. All three bolt AI onto a builder you still maintain, which is fine when the app is small and the data is not sensitive. Major takes a different route: an agent builds the whole tool as a deterministic app that runs on managed infrastructure, so you review the result rather than assemble it.