Retool costs $15/mo.
These cost $0.
5 free alternatives to Retool, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
Retool vs Free Alternatives Matrix
Quick side-by-side comparison · $0/mo vs $15/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Budibase | open source | GPL-3.0 | Self-host | ★ 28k | Retool vs Budibase → |
| Appsmith Free | free | Apache-2.0 | Hosted | ★ $0 forever | Retool vs Appsmith Free → |
| Directus Self-Hosted | free | MSCL-1.0 | Self-host | ★ $0 forever | Retool vs Directus Self-Hosted → |
| Retool Free | free | proprietary, free | Hosted | ★ $0 forever | Retool vs Retool Free → |
| ToolJet Free | free | AGPL-3.0 | Hosted | ★ $0 forever | Retool vs ToolJet Free → |
The picks
1 open source · 4 free to use · ranked by fit
- 01
Budibase
open sourceGPL-3.0Self-host28kjul 2026Internal apps, forms, automations, and portals in one box; much closer to Knack than its developer branding suggests.
The catch vs RetoolBudibase is faster for standard CRUD but gives up Retool's fine-grained UI composition, custom-code flexibility, connector breadth, and debugging tools.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Docker image or Docker Compose; Kubernetes is also supported
- setup
- Requires Docker and persistent storage; production use also means owning upgrades, TLS, backups, and database/network access
- engines
- Model-agnostic; the agent builder supports bring-your-own AI provider credentials
- your data
- Built-in app data and app definitions are stored in CouchDB, files in MinIO/S3-compatible object storage, and connected external data remains in its source system
- checked
- 2026-08-10
- 02
Appsmith Free
freeApache-2.0HostedFive people can build and run database-backed internal apps in the hosted product without paying.
The catch vs RetoolAppsmith's hosted free product has a smaller connector, component, mobile, debugging, and production-observability surface than Retool.
Install, platforms & data +
- platforms
- webthey host it
- install
- Hosted signup for Appsmith Cloud Free
- engines
- Appsmith's AI/agent features use Appsmith-managed AI services; exact model availability is product-controlled rather than a local backend
- your data
- App definitions, users, and secrets live in Appsmith Cloud; connected business data remains in the source database/API, while query results pass through Appsmith
- checked
- 2026-08-10
- 03
Directus Self-Hosted
freeMSCL-1.0Self-hostA polished data studio with tables, forms, dashboards, flows, and APIs; free only below its organization-size ceiling.
The catch vs RetoolDirectus is a polished data studio around a database, not a general arbitrary internal-app canvas, so bespoke multi-source tools require much more custom work.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Docker Compose with SQLite for a test install, or a supported SQL database and persistent file storage for production
- setup
- Requires Docker, a secret, persistent database/uploads, backups, TLS, and attention to Directus's non-OSI license and free-tier limits
- engines
- Optional AI Assistant supports OpenAI, Anthropic, Google, and OpenAI-compatible endpoints with the operator's API key
- your data
- Business records stay in the connected SQL database; assets live in configured local or object storage; Directus metadata is stored alongside the database
- checked
- 2026-08-10
- 04
Retool Free
freeproprietary, freeHostedThe same product is enough for one small team: five users, unlimited apps, every database and API connector, and role-aware actions.
The catch vs RetoolIt is the same product under user, workflow, AI, governance, and support limits that become restrictive as soon as the internal tool serves more than a tiny team.
Install, platforms & data +
- platforms
- mobilewebthey host it
- install
- Hosted signup in Retool Cloud
- engines
- Retool-managed AI models and agents; Free includes pooled AI credits and limited agent hours, while bring-your-own model keys are plan-dependent
- your data
- App definitions, Retool Database rows, and Retool file storage live in Retool Cloud; connected source data remains in the user's databases/APIs, although query results transit Retool
- checked
- 2026-08-10
- 05
ToolJet Free
freeAGPL-3.0HostedTwo builders, 50 users, two apps, and the actual database and API connectors, not a screenshot-only trial.
The catch vs RetoolToolJet's component and connector ecosystem, debugging experience, mobile tooling, and production polish are less mature than Retool's.
Install, platforms & data +
- platforms
- webthey host it
- install
- Hosted signup for ToolJet Cloud Free
- engines
- ToolJet AI uses vendor-hosted AI services and plan credits; bring-your-own LLM keys are an Enterprise add-on
- your data
- App metadata, ToolJet Database tables, secrets, and files live in ToolJet Cloud; connected source records remain in their external database/API
- checked
- 2026-08-10
Frequently Asked Questions
Direct answers · Retool open-source replacements
What is the best free alternative to Retool?+
The top free alternative to Retool is Budibase (open source, GPL-3.0). Internal apps, forms, automations, and portals in one box; much closer to Knack than its developer branding suggests. Other popular Retool replacements include Appsmith Free, Directus Self-Hosted, Retool Free.
Can I self-host a free replacement for Retool?+
Yes. Of the 5 free alternatives to Retool, 2 can be self-hosted on your own server or local machine: Budibase (GPL-3.0), Directus Self-Hosted (MSCL-1.0).
How much does switching from Retool to a free alternative save?+
Retool starts at $15/month per seat ($180/year). Switching a 5-person team to a free alternative like Budibase saves $900 per year in software subscription fees.
Should I vibe-code or build my own Retool clone from scratch?+
Our build verdict for Retool is KINDA (the core, yes. the polish, no). The core loop is buildable, but a dependable replacement becomes a real weekend or multi-day project. For Retool, build one internal CRUD tool over a trusted database with role-aware actions. The hard boundary is connectors, component library, permissions, workflows, and hosted runtime, plus connectors, runtime reliability, and governance.
What is the catch when switching from Retool to Budibase?+
Budibase is faster for standard CRUD but gives up Retool's fine-grained UI composition, custom-code flexibility, connector breadth, and debugging tools.
