Saltcorn

Overview

Saltcorn is an open-source platform for building apps around relational data, with visual tools for interfaces and workflows. It is best suited to developers and power users willing to take responsibility for deployment. Its strongest case is the combination of broad app-building capabilities and no licence or per-seat fee; its shared evaluation hosting is not suitable for production or real data.

Key features

Drag-and-drop builders cover relational tables, forms, dashboards, portals and workflows. That range can support operational tools, approval and compliance apps, internal databases, customer and staff portals, reservations, payments and legacy replacements. It gives teams room to shape applications around their processes, but building an app still requires decisions about its data, design and operation.

Saltcorn runs on PostgreSQL or SQLite and includes a JSON REST API for reading and writing data from other systems. Plugins can add data types, views and themes; the store includes extensions such as Apple Pay, CalDAV, CAPTCHA, charts and AI agents. This makes the platform adaptable, while its access controls have a specific limit: the ordered public, staff, user and admin roles cannot express department-specific rules.

Applications can be packaged for iOS and Android, with offline use supported by a local SQLite database that synchronizes later. Deployment options include Docker, Kubernetes, npm, marketplace templates, desktop use and air-gapped self-hosting. Self-hosted instances make no telemetry calls, and Saltcorn can run fully offline behind a firewall. These options suit organizations that need deployment control or offline operation, but put hosting choices and responsibility on the user.

Pricing

The Saltcorn open-source platform costs nothing. It is MIT-licensed, self-hosted and has no per-seat fee, making it the clearest fit for teams that can run and maintain their own instance. The trade-off is operational responsibility rather than a licence or seat charge.

Saltcorn free evaluation hosting costs nothing, but is for evaluation only. It has no availability or security guarantee and weak tenant isolation, so it should not hold production systems or real data.

DigitalOcean marketplace deployment costs $6 a month, billed from ~$6/mo, for a one-click droplet with database included. It offers a paid deployment route, though the stated price is a starting point.

Managed hosting via Elestio costs $16 a month, billed from about $16/month. It includes a dedicated VM, managed installation, TLS/SSL, encryption, backups, monitoring and updates. This is the more appropriate listed option for readers who want managed operations rather than a shared evaluation instance.

Saltcorn Collective also offers application building, support, training and platform enhancement services, and says it aims to respond to enquiries within two working days.

Platforms

Saltcorn supports web, Android, iOS, Linux, macOS and Windows, as well as API access and self-hosted deployment. Its documented deployment choices range from Docker and Kubernetes to npm and air-gapped installations. Mobile packaging and offline synchronization extend its reach beyond browser-based use, while self-hosting gives operators control over where it runs.

Who it's for

Saltcorn is a strong fit for individual power users, developers, agencies, growing companies, enterprises and local government that need custom database-backed applications and can manage deployment. Its self-hosting and offline options also suit organizations that want control over data handling. Teams needing department-specific permissions should look elsewhere, as should anyone planning to use the shared evaluation host for real workloads.

Pros and cons

Pros: MIT licensing and no per-seat fee make self-hosted use available without platform licensing costs.

Pros: Relational data, visual interfaces, workflows and a JSON REST API bring core app-building pieces together.

Pros: Mobile packaging, offline synchronization and air-gapped self-hosting support a range of deployment needs.

Cons: Self-hosting means taking responsibility for operating the platform; the free shared host lacks production guarantees and has weak tenant isolation.

Cons: The documented roles cannot enforce department-specific access rules, which may not suit organizations with that permission requirement.

Alternatives

Consider FlutterFlow if you want a free plan capped at two projects, 10 Lite credits, five lifetime AI requests and two API endpoints, or need its listed Linux, macOS, web and Windows platforms alongside Android and iOS. Choose Ragic for a free plan with three custom sheets, 1,000 records per sheet, unlimited users and 10 GB upload storage. Ninox is another option with a free plan capped at five users, 100 MB storage, 5,000 records and 1,000 API calls per month.

Retool has a free plan and a Team plan priced at $10 a month, billed at $10/mo per builder and $5/mo per internal user; its listed platforms include self-hosted deployment and API access. UI Bakery offers a free plan with unlimited apps and data-source connections, and lists web, Windows, Linux and self-hosted platforms. Adalo is worth considering for Android, iOS and web app building; its free plan allows 500 records per app and one app editor.

Bubble offers a free Web + Mobile plan with one app editor, 50K workload units per month and six hours of server logs. Caspio is a paid alternative with a free trial and listed support for API access and self-hosting. For broader comparisons, see No-Code Development Platforms, No-Code Database Software and No-code app builders.

Verdict

Choose Saltcorn if you want a flexible, relational-data app builder without licence or per-seat fees and can operate it yourself or pay for a hosting option. Its breadth, API and offline-capable mobile apps are compelling for teams that value control. Look elsewhere if production-ready shared hosting or department-specific access rules are essential.