Inngest alternative: node-flow vs Inngest

node-flow vs Inngest — a self-hosted JSON workflow orchestrator with polling workers in any language, as an alternative to event-driven step functions.

node-flow is an Inngest alternative for workflows that should be data, not code. Inngest runs step functions: event-triggered functions in your app, written with its SDK, where each step.run is checkpointed and the function is re-invoked over HTTP to continue. node-flow holds the workflow itself as a JSON DAG, and workers — any language, no SDK required — poll for the steps they own.

Why people look for an Inngest alternative

The workflow should outlive one codebase. When a process spans several services and teams, a JSON definition registered with the orchestrator is a shared artefact; a function inside one app is not.
Pull, not push. Inngest calls your endpoints. node-flow workers poll and lease, so they can sit behind a firewall with no inbound route, and concurrency caps and rate limits are enforced at dequeue on the server.
One dependency to self-host. node-flow is one image on PostgreSQL 18.
Operators, not just developers. Retry a step, rerun from a task, terminate, bulk actions and a human-task inbox are in the dashboard.

node-flow vs Inngest at a glance

	node-flow	Inngest
Workflow is…	A JSON DAG	A function using the Inngest SDK
Execution	Workers poll and lease tasks	Inngest invokes your function over HTTP per step
Languages	Any, over HTTP	Languages with an Inngest SDK
Triggers	API, cron, signed webhooks, Kafka/NATS/AMQP/SQS/Redis Streams events	Events, cron, webhooks
Flow control	Concurrency, rate limits, semaphores enforced server-side at dequeue	Concurrency, throttling, debounce, priority
Human approvals	`HUMAN` task with inbox	`waitForEvent` plus your own UI
Self-hosting	PostgreSQL 18	Inngest server with its own stores
Managed offering	Self-hosted	Inngest Cloud

When Inngest is the better choice

Choose Inngest when your workflows live inside one application, you like defining them next to the code that runs them, and you want event-driven features such as debounce and batching with a managed service behind them.

Frequently asked questions

What is a self-hosted alternative to Inngest?

node-flow is a self-hosted workflow orchestrator that runs on PostgreSQL alone. Workflows are JSON DAGs, workers poll for tasks in any language, and triggers include cron, signed webhooks and message-broker events.

Do node-flow workers need a public endpoint?

No. Workers make outbound HTTP requests to lease tasks, send heartbeats and report results, so they can run in private networks with no inbound traffic.