Best Self-Hosted Alternatives to Zapier
Zapier is the default way to make one web app talk to another without writing code — a trigger, a few steps, and a bill that scales with how many tasks you run. What sends people looking elsewhere is rarely the editor; it is per-task pricing on automations that run all day, and routing every customer record and API key through a vendor. The self-hosted tools below run the same job — triggers, connectors, schedules, webhooks — on one box you size once, with your credentials staying on it.
Zapier costs about $240/year and keeps your data on its servers. These researched, open-source alternatives give you the same workflow on hardware you own — here's what each needs to run.
- The closest shape to Zapier itself
- n8n — a visual builder with a very large application-node library, one container — source-available under the Sustainable Use License, with SSO, projects and environments sold as paid editions.
- An MIT-licensed visual builder with AI agents built in
- Activepieces — the Zapier-style canvas and a TypeScript pieces library under an MIT core, with MCP servers in the open core (AI agents are paid-layer) — pre-1.0, with a 4 GB compose stack for production.
- Events, devices and MQTT rather than SaaS
- Node-RED — flow-based programming under Apache-2.0 and the OpenJS Foundation, light enough for a Raspberry Pi — secure its editor before exposing it, and expect to hand-roll SaaS API calls.
- Developers who would rather write the automation
- Windmill — scripts in Python, TypeScript, Go, Bash, SQL and more become webhooks, flows and internal UIs on an AGPL-3.0 core — a multi-gigabyte compose stack and a 50-user cap in the free edition.
- Web-watching agents under plain MIT
- Huginn — a Rails application that scrapes, watches and acts through agents you configure as JSON; one container with a bundled MySQL, in development since 2013, nothing held back.
The alternatives
What you give up by leaving Zapier
Leaving Zapier means giving up the largest connector catalogue in the business, a managed service that never needs patching, and a builder anyone in the company can use without a login to a server. The alternatives split by shape: n8n and Activepieces reproduce the visual, connector-driven builder; Node-RED is a flow programming tool built for events and devices; Windmill is a code-first developer platform; Huginn runs agents you configure as JSON. Read the license line twice — n8n is source-available and Windmill's shipped image is not purely open source — and expect SSO, audit logs and team features to sit behind paid editions in n8n, Activepieces and Windmill even when self-hosted.
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Head-to-head
The two Zapier-shaped visual builders in this hub — an MIT core that is still pre-1.0 vs. the mature, source-available incumbent.
Two browser flow editors on Node.js that do different jobs — event and device plumbing under Apache-2.0 vs. SaaS-to-SaaS automation under a source-available license.
A code-first developer platform with an AGPL core and a seat cap vs. a no-code integration tool with no seat cap and a source-available license.
Common questions
Are these Zapier alternatives really free?
The software is open-source and free to run. Your only cost is the server it runs on — often a few dollars a month, less than most SaaS subscriptions.
How much server do I need to self-host one?
Most of these run comfortably on a small VPS — 1–2 GB of RAM is enough for a single-user or small-team setup. Each app's page lists its minimum RAM.
Will I lose features by leaving Zapier?
It depends on the app. The alternatives below cover the core workflow; polish and integrations vary, so check each one's stack and difficulty before you commit.