Look for a Budibase alternative by who'll be building the apps and where your data already lives. Developer-first tools give more control over code, governed platforms put IT in charge of access and auditing, and portal builders sit on top of spreadsheets or databases you already use, so match the tool to the builder.
Ask who on your team will open the editor every week, and most of this decision is made for you. Budibase calls itself an open source platform for building and running apps, automations and agents around existing systems, with enterprise governance and deployment on your terms. People usually leave because they want a different balance: more developer control, client portals on the data they already have, or a platform that IT can govern centrally.
The eight tools below are listed in no particular order. None is ranked, none is linked, and they're grouped first by who builds with them.
Developers, IT or operations: who's building?
Developers who want control. Retool describes one engine for building, deploying and managing internal tools that connects to any database, API or LLM. A second open-source builder in the list works on top of your data and APIs, and there's a code-first workflow platform too, which comes up again in the section on self-hosting.
IT teams who want governance. Superblocks leads with one governed path to production, with integrations managed by IT as well as access. DronaHQ covers similar ground with SSO, role-based access and audit logs, and its page says it runs on cloud or self-hosted.
Operations teams building portals. Noloco is an AI portal builder for bringing your team, clients and data into one system. Stacker starts from a spreadsheet or base you already keep and can also produce internal tools and partner apps. Tadabase is a no-code database and web app builder for custom portals.
Eight builders by who they're made for
| Tool | Built for | Where it's strongest |
|---|---|---|
| Appsmith | Open-source low-code builder | Custom internal software on your own data |
| DronaHQ | Governed internal app platform | SSO, roles and audit logs from day one |
| Noloco | Portal and ops app builder | Client portals on data you already have |
| Retool | Developer-first internal tool platform | One engine for databases, APIs and LLMs |
| Stacker | Spreadsheet-to-portal builder | Customer portals from a spreadsheet |
| Superblocks | Governed AI app builder | Central IT control over business-built apps |
| Tadabase | No-code database and portal builder | Centralising operations in one portal |
| Windmill | Code-first workflow and app platform | Workflows and scripts as well as apps |
A line on each builder
Appsmith
Best for: Developers building custom internal software on top of their own data and APIs with an open-source low-code platform.
DronaHQ
Best for: IT teams shipping AI-built internal apps and agents to production with SSO, role-based access and audit logs in place.
Noloco
Best for: Operations teams running complex processes who want portals on the data they already have rather than a new database.
Retool
Best for: Engineering teams that want to build, deploy and manage internal tools on one engine connected to any database, API or LLM.
Stacker
Best for: Small businesses turning an Airtable base, Google Sheet or database into a login-protected customer portal without code.
Superblocks
Best for: Companies where business teams generate apps on company data while IT keeps central control of auth, access and auditing.
Tadabase
Best for: Teams that want to connect their data, then invite colleagues into a custom portal that centralises day-to-day operations.
Windmill
Best for: Developers who prefer code-first workflows, internal software and AI agents, run in its own UI or locally with per-team access scoping.
Self-hosted doesn't mean nobody maintains it
Open source and self-hosted are often the reason people chose Budibase in the first place, and several tools here can also run on your own servers. That's real control, but it isn't free of work. When you host, upgrades, backups and security patching become your job, and they don't stop once the app is live.
There's a second catch. Some vendors sell an enterprise edition alongside the open version. Windmill's page, for example, refers to its enterprise-edition customers. So before you plan around a feature, check which edition it sits in and whether that's the edition you'll run on your servers. It's an easy thing to miss in a demo, where everything is switched on.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
None of that is a reason to avoid self-hosting. It's a reason to put a name next to the maintenance before you start, the same way you would for any other system your team relies on.
Plain advice on choosing between them
If your developers will build and maintain the apps, pick from the developer-first group and judge them on how they handle your existing databases and APIs. If business teams will build and IT has to sign off, the governed platforms are the safer bet, because access and auditing are designed in rather than added later. If you mainly need clients or staff to log in and see their own records, a portal builder will get you there faster than a general app platform.
For a wider view, my guide to the best low-code platforms covers builders beyond internal tools, and my list of Appsmith alternatives is worth reading if the open-source developer route is where you're leaning.
Rebuild one real screen first
Don't judge any of these on a template. Take one screen your team uses every day and rebuild it in a trial.
- Pick a screen that reads and writes real data, not a static report.
- Connect it to a copy of the same database or spreadsheet you use now.
- Add the permissions it needs, so the right people see the right records.
- Ask the person who uses it most to try it for a few days.
- Write down what you still have to maintain: hosting, upgrades, connectors and access rules.
If that one screen feels better than what you've got and the maintenance list looks manageable, you've found your tool. If not, try the next group before you try the next vendor.
Do you make an internal app or portal builder? Tool makers can ask to be considered for a featured place on this list.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
Does self-hosting mean less work?
No. It gives you control over where the app and data live, but upgrades, backups and security patching become your team's job.
What's the difference between an internal tool builder and a portal builder?
Internal tool builders are made for staff working with company data and systems. Portal builders focus on giving clients, partners or staff a login to see and update their own records.
Can I keep my data where it already sits?
Most of these tools connect to databases, APIs or spreadsheets you already use, so your data can stay put. Check the specific connectors you need in a trial.
Do open-source editions leave out features?
Some vendors sell an enterprise edition alongside the open version. Check which edition includes the features you rely on before you plan around them.
Who should own the apps once they're built?
Whoever will fix them when something changes. For developer tools that's usually engineering, and for portal builders it's often the operations team that asked for them.
Can these tools build AI agents as well as apps?
Several now mention agents or LLM connections on their pages. Treat that as a starting point and test it on a real task before you rely on it.
