The 7 Open Source Zapier Alternatives, Honestly Compared
Self-host difficulty, integration count, and the maintenance hours nobody quotes you — plus the cost-at-scale math that makes leaving Zapier worth it. All numbers sourced and dated 2026-05-30.
The honest comparison table
Stars and integration counts are a proxy for momentum and connector coverage, not quality. Self-host difficulty is what actually costs you weekends. All figures as of 2026-05-30.
| Tool | Stars | Integrations | License | Stack / self-host | Self-host difficulty | Best for |
|---|---|---|---|---|---|---|
| n8n | ~190k | 400+ | fair-code (Sustainable Use) | TypeScript, Docker/npx | Low-medium | Zapier-style no-code, most connectors |
| Automatisch | ~13.8k | ~150 | AGPL-3.0 + Enterprise | docker compose up | Low-medium | AGPL-pure, simpler needs |
| ActivePieces | ~22.5k | 200+ pieces (60% community) | MIT + commercial | TypeScript, Docker | Low | Cleanest UX (reseller-gated) |
| Kestra | ~26.9k | 1,200+ plugins | Apache 2.0 | JVM + PostgreSQL, Docker/K8s | High | Data pipelines / orchestration |
| Windmill | ~16.6k | code-first | AGPLv3 + proprietary | Rust + Svelte + PostgreSQL | Low (3-file compose) | Code-first internal tools |
| Node-RED | ~23.2k | 3,000+ community nodes | Apache 2.0 | Node.js (port 1880) | Medium | IoT / event-driven |
| Huginn | ~49.4k | agent-based | MIT | Ruby on Rails + MySQL/Postgres | High (stale) | Tinkerers, IFTTT-style |
Sources: n8n, Automatisch, ActivePieces, Kestra, Windmill, Node-RED, Huginn (GitHub, 2026-05-30). n8n ~190k stars and fair-code/Sustainable Use License confirmed on the n8n repo 2026-05-30.
The cost-at-scale math (why people actually leave)
This is the wedge. Zapier and Make meter you per task/operation; self-hosted n8n doesn't meter executions at all — you pay for a VPS and your own time. The gap explodes as volume grows.
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| Tool | Basis | 5k/mo | 50k/mo | 500k/mo |
|---|---|---|---|---|
| Zapier | per-task | ~$73.50-139 (Professional) | several hundred USD (Team) | toward $5,999 ceiling (Enterprise) |
| Make | per-operation | $9 (Core base) | ~$43.59 (secondary estimate) | ~$338 (secondary estimate) |
| n8n Cloud | per-execution | ~EUR 50 (Pro, 10k execs) | ~EUR 667 (Business, 40k execs) | custom (Enterprise) |
| n8n self-hosted (VPS) | flat VPS, unmetered | ~$5 + ~1-2 hrs/mo | ~$5-9 + ~1-3 hrs/mo | ~$9-18 + ~2-3 hrs/mo + queue mode (Redis) |
The headline: at ~40-50k executions/mo, n8n Cloud Business is EUR 667 — the same workload on a ~$5-9 Hetzner CX22 (EUR 4.49) is unmetered. You trade roughly 1-3 maintenance hours a month for that delta. Whether that's worth it is the only real question; if your time is worth more than the savings, self-hosting is a false economy.
Sources: Zapier pricing, Make pricing (Core base $9 confirmed 2026-05-30), n8n pricing (Pro EUR 50 / 10k execs; Business EUR 667 / 40k execs, confirmed 2026-05-30), n8n self-host (2026-05-30). Make's per-operation cost at 50k (~$43.59) and 500k (~$338) is NOT flat-published — Make's pricing page shows only a $9/$16/$29 base with a credit slider, so those figures are secondary estimates (via analysis); verify on the live slider before relying on them. Zapier 50k/500k tiers are likewise slider/quote-priced.
n8n — the default pick for Zapier leavers
n8n (~190k stars, 400+ integrations, fair-code Sustainable Use License) is the closest open-source experience to Zapier's visual builder, and it has the most connectors of the OSS no-code set. Self-host is a single Docker container for low volume; at high throughput (~500k executions) you add queue mode — Redis plus worker processes. Budget ~1-3 maintenance hours a month per the cost matrix.
The catch worth naming: it's fair-code, not OSI open source. The Sustainable Use License restricts hosting it as a competing service. For internal team use that's a non-issue; if you plan to resell automation-as-a-service, read the license first.
Two routes: self-host for unmetered executions on a $5 VPS, or — if you'd rather not run a server at all — try n8n Cloud, which is the monetizable hosted tier and removes the maintenance hours entirely. n8n Cloud is per-execution: Pro is EUR 50/mo for 10,000 executions, Business EUR 667/mo for 40,000. Source: github.com/n8n-io/n8n, n8n.io/pricing (2026-05-30).
The four you'll consider but probably skip
Automatisch (~13.8k stars, ~150 integrations, AGPL-3.0 + Enterprise) is the AGPL-pure alternative for teams that want a copyleft license rather than n8n's fair-code. Self-host is docker compose up. The tradeoff is connector breadth and cadence — a smaller community and less frequent updates than n8n (per OpenAlternative). Pick it if ~150 integrations cover your stack and license purity matters.
ActivePieces (~22.5k stars, 200+ pieces, MIT community edition) has arguably the cleanest UX and a TypeScript pieces framework, ~60% community-contributed. We cover it editorially only — it's reseller-gated, so there's no affiliate route in this version.
Kestra (~26.9k stars, 1,200+ plugins, Apache 2.0) is genuinely excellent, but it's an orchestrator for event-driven and scheduled data pipelines — not a no-code SaaS-glue tool. Self-host needs JVM + PostgreSQL, heavier than the Node-based options. If you're replacing Zapier, it's the wrong shape; if you're building data workflows, it's a top pick.
Windmill (~16.6k stars, AGPLv3 + proprietary, Rust/Svelte/PostgreSQL) is code-first — Python/TS/Go/Bash/SQL — for internal tools and scripts, not visual no-code. Self-host is reportedly plug-and-play (3-file Docker Compose). Great if your team writes code; not a Zapier swap if they don't.
Sources: GitHub repos above (2026-05-30).
The two for tinkerers (Node-RED and Huginn)
Node-RED (~23.2k stars, 3,000+ community nodes, Apache 2.0, OpenJS Foundation) is flow-based and runs on Node.js (port 1880). It's outstanding for IoT and event-driven wiring, but weaker on SaaS connectors out of the box — the node count is huge, but coverage skews hardware/protocol, not Stripe/HubSpot/Slack. Mature and stable, medium setup effort.
Huginn (~49.4k stars, MIT, Ruby on Rails + MySQL/Postgres) is the agent-based, IFTTT-style granddaddy. The star count is misleading: the latest tagged release is v2022.08.18 with 611 open issues and limited recent activity. It's the most technically demanding self-host here — Ruby on Rails plus real server admin. Choose it only if you specifically want Huginn and enjoy the maintenance.
Difficulty ranking, low to high: Windmill / ActivePieces / n8n (near plug-and-play Docker Compose) < Automatisch < Node-RED < Kestra (JVM + Postgres) < Huginn (Rails, stale). Sources: Node-RED, Huginn (2026-05-30; Huginn 49.4k stars, latest release v2022.08.18, 611 open issues confirmed).
What to actually do
Self-host n8n if you want the Zapier feel, the most connectors, and unmetered executions for the price of a $5 VPS plus a couple of hours a month. Reach for Kestra or Windmill only if your real job is data orchestration or code-first internal tools, not SaaS automation. Use Automatisch if AGPL licensing is a hard requirement and ~150 integrations are enough.
And if running a server is a dealbreaker — be honest about that before you spend a weekend on Docker — skip open source entirely. Make's per-operation pricing beats Zapier's per-task model at 5k, 50k, and 500k, with no infrastructure to babysit. Or n8n Cloud if you want n8n's builder without the VPS.
FAQ
Is self-hosting n8n really free?
The software is free to self-host (fair-code Sustainable Use License) and executions are unmetered. Your real costs are a VPS (~$5/mo on a Hetzner CX22, EUR 4.49) and ~1-3 maintenance hours a month. So not zero — but a fraction of metered cloud pricing. Source: github.com/n8n-io/n8n, 2026-05-30.
Which open-source tool has the most integrations?
Among no-code Zapier-style tools, n8n leads with 400+ integrations. Kestra lists 1,200+ plugins and Node-RED 3,000+ community nodes, but those skew toward data orchestration and IoT/protocols respectively, not SaaS connectors. Automatisch has ~150, ActivePieces 200+ pieces. Source: GitHub, 2026-05-30.
Why isn't Kestra or Windmill your top pick if they have great reviews?
They're excellent at what they do, but they aren't Zapier replacements. Kestra is a data-pipeline orchestrator (JVM + PostgreSQL); Windmill is a code-first platform (Python/TS/Go). Neither offers the visual, no-code SaaS-glue experience a Zapier leaver expects. For that, n8n fits better.
Is Huginn worth using in 2026?
Only for tinkerers. Despite ~49.4k stars, its latest tagged release is v2022.08.18 with 611 open issues, and it's the most demanding self-host (Ruby on Rails + server admin). For active development and easy setup, n8n, ActivePieces, or Automatisch are better. Source: github.com/huginn/huginn, 2026-05-30.
What if I don't want to run a server at all?
Then open source probably isn't your answer. Make's per-operation pricing starts at $9/mo (Core), and its per-operation model undercuts Zapier's per-task pricing as volume scales — with zero infrastructure to run. n8n Cloud also removes the maintenance burden if you specifically want n8n's builder (Pro is EUR 50/mo for 10,000 executions). Sources: make.com/pricing and n8n.io/pricing, 2026-05-30.