If you're looking for a different Flowlet alternative, Pipedream is a powerful option. Pipedream lets developers build complex applications across their service stack with both low-code and no-code interfaces. It can deploy instantly without server setup and has access to more than 2,100 APIs through npm and PyPI packages. That means you can tap into a huge range of services, and you can add custom logic written in Node.js, Python, Go or Bash.
Another option is n8n, an extensible, secure AI-native workflow automation tool. It's got a visual workflow editor, but you can also add code in JavaScript or Python. With 400+ integrations, self-hosted infrastructure and strong security, n8n is geared for technical teams. But it's also got enterprise-scale features and pricing tiers for different business needs.
PROCESIO is another option worth evaluating. It's got both no-code and low-code abilities to automate entire suites of applications. PROCESIO's developer interface lets you add custom actions in JavaScript, Python and C#. It's got a Forms & Tasks Designer, Document Designer and custom actions, so it's good for lots of different industries and use cases.
Last, BuildShip is a low-code visual backend builder that brings AI to the party to speed up workflow, API and cloud function creation. It's got prebuilt nodes and AI-generated nodes so you can easily connect to a broad range of services and models. With features like an integrated Firestore database, secret manager and support for 1M+ NPM packages, BuildShip is a good option for developers and teams that want to build scalable backend applications with a minimal amount of code.