Workflows
n8n connects 500+ apps with custom code and AI agents and can be self-hosted with SSO and audit logs. Automa pairs AI agents with RPA and connects to SAP and Salesforce.
Alternatives / Appian
8 open-source alternatives
8 Best Open Source Appian Alternatives in 2026
Looking for an open source Appian alternative? We compared 8 open source low-code and automation platforms by license, scope, and maintenance. n8n handles workflows, Appsmith and ToolJet build internal tools, and Convertigo targets enterprise apps.
Written by Maxime DERAME
Last updated:
Best Appian alternatives at a glance
| Alternative | Best for | License |
|---|---|---|
| n8n | 500+ apps and AI agents (fair-code) | Sustainable Use License + enterprise (.ee) files |
| ToolJet | Internal tools builder | AGPL-3.0 + enterprise features |
| Appsmith | Drag-and-drop internal tools | Apache-2.0 |
| Refine | React framework for admin panels | MIT |
| Budibase | Business apps from data sources | GPL-3.0 + MPL-2.0 client libraries |
| NocoBase | Plugin-based no-code platform | NocoBase License (Apache-based) |
| Automa | AI agents with RPA | AGPL-3.0 or Automa Commercial License |
| Convertigo | Enterprise low-code with offline sync | AGPL-3.0 (Community Edition) |
How we chose these Appian alternatives
We looked for open-source platforms that build business apps and automate processes like Appian. We verified each project's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.
Internal tools
Appsmith and ToolJet are drag-and-drop platforms for internal tools. Budibase connects many data sources, Refine is a React framework for admin panels, and NocoBase is a no-code platform with a plugin system.
Enterprise apps
Convertigo is a full-stack low-code platform with 300+ connectors and offline sync, with paid tiers for managed cloud, SLAs, and enterprise connectors.
Important: licenses
n8n uses the Sustainable Use License. ToolJet is AGPL-3.0 with enterprise features, Automa is AGPL-3.0 or commercial, and NocoBase uses its own license.
License details
Appsmith is Apache-2.0. Refine is MIT. Budibase is GPL-3.0 with MPL client libraries. Convertigo Community is AGPL-3.0.
Maintenance status
Most had commits within weeks of this update.
Why look for a Appian alternative?
Appian is a proprietary enterprise platform sold by license. Open-source platforms are free to self-host and flexible, but lack Appian's case management depth and enterprise support.
n8n.io
n8n is a fair-code platform to build and deploy workflows and AI agents with a visual canvas plus optional JavaScript or Python code, 500+ integrations, and self-hosting as a first-class option. It uses the Sustainable Use License, which is source available rather than standard open source, and files marked .ee need an enterprise license. SSO, RBAC, and audit logs are in the on-premises enterprise path.
208.2K61.2KSustainable Use License + enterprise (.ee) filesSelf-hosted
Pricing: Free to self-host under the license terms; cloud and enterprise plans are paid.
- Visual canvas with code when needed
- 500+ integrations and AI agent features
- Huge community
- Sustainable Use License is not standard open source
- Some features need an enterprise license
tooljet.com
ToolJet is an AGPL-3.0 low-code platform for building internal tools, dashboards, and admin panels with a drag-and-drop builder, many data source connectors, and built-in AI features. An enterprise offering adds security and compliance features such as audit logs, advanced access control, and support SLAs.
41.1K5.5KAGPL-3.0 + enterprise featuresSelf-hosted
Pricing: Free to self-host; cloud and enterprise plans are paid.
- Drag-and-drop builder with many connectors
- Self-hosted or cloud
- Active development
- AGPL-3.0 license
- Enterprise features are paid
appsmith.com
Appsmith is an Apache-2.0 low-code platform for building internal tools, admin panels, and dashboards with a drag-and-drop interface, many database and API integrations, and customizable workflows. It can be self-hosted or used in the Appsmith cloud, with paid plans for advanced and enterprise features.
41.1K4.8KApache-2.0Self-hosted
Pricing: Free to self-host; cloud and enterprise plans are paid.
- Drag-and-drop UI with many data source integrations
- Apache-2.0 license
- Cloud or self-hosted deployment
- Needs JavaScript skills for complex logic
- Some advanced and enterprise features are paid
refine.dev
Refine is an MIT-licensed React meta-framework for building admin panels, internal tools, and data-heavy applications in code, with connectors for many backends and UI libraries. It requires coding in React, and its last commit was in September 2026.
35.9K3.3KMITFramework
Pricing: Free and open source; a paid enterprise offering exists.
- Full control in React and TypeScript
- Many backend and UI integrations
- MIT license
- Code-first, with no visual builder
- Requires React skills
budibase.com
Budibase is a low-code platform for building custom business web apps on top of your own data, with data integrations, automations, and self-hosting. The platform is licensed GPL-3.0 and its client and component libraries are MPL-2.0, so the apps you build are not themselves subject to the GPL. Paid cloud and enterprise plans add features.
28.3K2.2KGPL-3.0 + MPL-2.0 client librariesSelf-hosted
Pricing: Free to self-host; cloud and enterprise plans are paid.
- Builds apps on top of your existing data
- Automations and self-hosting
- Apps you build are not covered by the GPL
- GPL-3.0 platform license
- Some features require paid plans
nocobase.com
Build CRM, ERP, approval, and back-office applications using visual data modeling, workflows, permissions, plugins, and AI-assisted development. Its license adds restrictions to Apache-2.0.
24.7K2.9KNocoBase License (Apache-based)Self-hosted
Pricing: Self-hosted options; commercial licensing applies to restricted uses and features.
- Visual data modeling and app building
- Workflows, permissions, and plugin architecture
- Useful for CRM and ERP systems
- Additional restrictions beyond Apache-2.0
- Not OSI-approved under the complete current license
- More complex than a simple database workspace
automa.site
Automa is a no-code platform that combines AI agents with robotic process automation, running in the browser for tasks such as invoices and reconciliation. Its source is variously licensed under the AGPL or the Automa Commercial License, and it is aimed at business users rather than developer pipelines. Its last commit was in March 2026.
21.7K2.3KAGPL-3.0 or Automa Commercial LicenseBrowser extension
Pricing: Free under the AGPL; commercial use and enterprise features need a commercial license.
- No-code browser automation with AI
- Large user base
- Open source code
- Dual licensing with a commercial option
- Last commit in March 2026, so development is slower
convertigo.com
Convertigo is a full-stack platform combining no-code and low-code studios to build web, mobile, and desktop business apps, with 300+ connectors. The Community Edition is AGPL-3.0-based, free for unlimited apps and on-premises install, while managed cloud, SLAs, offline data, and enterprise connectors are paid.
38671AGPL-3.0 (Community Edition)Self-hosted
Pricing: Free Community Edition; managed cloud and enterprise features are paid.
- No-code and low-code studios with 300+ connectors
- Unlimited apps on premises in the Community Edition
- Mobile, web, and desktop targets
- Aimed at large organizations and heavier to learn
- Enterprise features require paid tiers
Compare Appian alternatives
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| n8n | Workflow automation | Sustainable Use License | Yes | Process automation |
| ToolJet | Low-code platform | AGPL-3.0 + enterprise | Yes | Dashboards |
| Appsmith | Low-code platform | Apache-2.0 | Yes | Closest in feel |
| Refine | React framework | MIT | In your app | Developers |
| Budibase | Low-code platform | GPL-3.0 + MPL-2.0 | Yes | Business apps |
| NocoBase | No-code platform | NocoBase License | Yes | Custom systems |
| Automa | RPA and agents | AGPL-3.0 or commercial | Yes | Enterprise automation |
| Convertigo | Low-code platform | AGPL-3.0 (Community) | Yes | Enterprise apps |
Which one should you choose?
Want process automation
n8n connects 500+ apps under a fair-code license.
Want internal tools
Appsmith offers drag-and-drop widgets and role-based access.
Want enterprise low-code
Convertigo has 300+ connectors, with paid tiers for enterprise needs.