Best Open Source Automation Platforms 2026
Our curated ranking of the top open-source workflow automation platforms for teams that want transparency, self-hosting capabilities, and community-driven development.
| Rank | Tool | Score | Best For | Evaluated |
|---|---|---|---|---|
| 1 | n8n n8n leads the open-source automation space with the most mature platform, largest community, and richest integration ecosystem. Its Sustainable Use License enables free self-hosting with unlimited workflows, making it the go-to choice for teams wanting full control. Strengths:
Weaknesses:
| 9.2 | Best for: technical teams wanting the most complete open-source automation platform | Feb 3, 2026 |
| 2 | Activepieces ActivePieces has emerged as the fastest-growing open-source alternative with a clean modern UI and a rapidly expanding integration library. Its licence is MIT at the core, with packages/ee under a proprietary Activepieces Enterprise licence that requires a paid seat licence for production use. Its no-code approach makes it the most accessible open-source option for non-technical teams. Strengths:
Weaknesses:
| 8.7 | Best for: teams wanting a MIT-licensed-core automation platform with a modern interface | Feb 3, 2026 |
| 3 | Windmill Windmill brings a unique code-first approach where scripts automatically become UIs, workflows, and scheduled jobs. It is the strongest choice for engineering teams who think in code and want a platform that respects that. Strengths:
Weaknesses:
| 8.4 | Best for: engineering teams who prefer code-first automation and internal tool building | Feb 3, 2026 |
| 4 | Huginn Huginn is a self-hosted, open-source system for building agents that perform automated tasks online. Written in Ruby on Rails, it can monitor web pages, receive webhooks, and respond to events by creating chains of agent actions. With approximately 49,600 GitHub stars, it has a dedicated community focused on personal automation and data monitoring use cases. Strengths:
Weaknesses:
| 6.8 | Technical users who want fully self-hosted personal automation for web monitoring, data collection, and event-driven workflows | Feb 3, 2026 |
| 5 | Automatisch Automatisch is an open-source workflow automation tool positioned as a self-hosted alternative to Zapier. It provides a visual flow builder with trigger-action patterns and supports Docker-based deployment. The project has over 6,000 GitHub stars and offers approximately 50 connectors for common SaaS applications as of March 2026. Strengths:
Weaknesses:
| 6.5 | Small teams and individuals seeking a self-hosted Zapier alternative with a familiar trigger-action interface | Feb 3, 2026 |
| 6 | Apache Airflow Apache Airflow is an open-source workflow orchestration platform originally developed at Airbnb. It uses Python-based DAGs (Directed Acyclic Graphs) to define, schedule, and monitor data pipelines and workflows. With 46,285 GitHub stars as of July 2026, and a GitHub contributors endpoint that paginates to 4,509 distinct commit-author identities, Airflow has one of the largest contributor communities in the automation ecosystem. Strengths:
Weaknesses:
| 7.2 | Data engineering teams needing a Python-native, open-source workflow orchestrator for scheduled data pipelines | Mar 25, 2026 |
| 7 | Prefect Prefect is a modern open-source workflow orchestration framework built in Python. It supports both self-hosted (Prefect Server) and managed (Prefect Cloud) deployment with a hybrid execution model. Prefect emphasizes developer experience with decorators-based workflow definition and automatic retries. Strengths:
Weaknesses:
| 7.5 | Python teams wanting a modern alternative to Airflow with better developer ergonomics and hybrid cloud execution | Mar 25, 2026 |
Common Questions
Can you automate a platform with no API using Zapier?
Not as a proper Zapier app. Zapier's help centre, updated 29 May 2026, says a private app can be built "for any service with a public API", and its fallbacks for a missing app are email parsing, RSS, webhooks, asking Zapier to add the app, or using a different app. Those let a no-API platform tell a Zap that something happened; none of them lets a Zap act inside the platform. The Zapier Agents Chrome extension can "run actions" on a page open in your own browser (help article updated 27 April 2026), but that is hands-on help, not a reusable Zap step.
How does Moxo keep humans in control when AI agents run a workflow?
Moxo keeps people on the decisions by design: approvals and other human steps are ones its product page says "only a person can close", and AI agents can fill preparer, advisor or reviewer slots around them (both read 15 September 2026). The checks on AI output are opt-in, though. In synthetic AutomationAtlas tests that day, an AI extract step's "Human review" and "Supervisor Agent" switches were both off by default, and the builder accepted the same role as a form's submitter and its approver.
How much does Moxo cost in 2026?
Moxo's only published price is Team: $5,000 a year, billed annually with no monthly option, for 100 flows and $100 of AI a year with unlimited seats (moxo.com/pricing, 28 September 2026). Scale (500 flows and $500 of AI a year) and Enterprise are custom quotes. There is no free plan, no published overage rate and no stated trial length, and the dollar AI allowance has no published conversion to the credits Moxo's product logs.
What is Moxo?
Moxo AI (app.moxo.com) is a process orchestration platform from Moxo, formerly Moxtra, for work where several parties, approvals and documents meet. You build templates of human steps, AI steps and automations, each run is a Flow with its own data and status, and outsiders act through account-free Magic Links. Its only published price is Team, and the AI agents start on the custom-quoted Scale plan (moxo.com/pricing, 15 September 2026). It is not Moxo Classic, the older app.
Related Guides
Moxo vs Lindy in 2026: Who Presses Approve When the Agent Asks
Lindy, founded in 2023, sells an AI teammate that lives in Slack and in each person's inbox; Moxo, whose predecessor Moxtra was co-founded in 2012, runs multi-party processes where approvals are steps only a person can close. Moxo wins three rounds to two: who closes the step, work across companies and the record. Lindy wins reach and testing. Vendor pages and docs read 28 September 2026.
Moxo vs Kissflow in 2026: What an Outside Approver Costs, and What the Record Proves
Moxo and Kissflow both sell approvals to people who do not write code, and each wins one round outright: Moxo's Web and Headless SDKs run the approval inside the buyer's own product, under the buyer's own sign-in. Kissflow's portal audit log stamps every event with an actor, a device and an IP, where Moxo publishes no field list. Both answers are quoted, not priced, and both meters punish a one-step request sent to hundreds of clients. Cost, the decision record, rejection routes, AI metering and governance, verified 14 to 23 September 2026.
Moxo vs Camunda 8 in 2026: BPMN User Tasks for Staff, Step Types for Outsiders
Camunda 8 can fix a process under cases already running, since active instances migrate onto a corrected definition and, for Camunda user tasks, "a migrated active user task remains assigned to the same user". Moxo keeps the shared queue that Camunda's Tasklist V2 stops evaluating, with desks that are "a shared inbox that multiple users can pick work from". Those are the two knockouts in a fight Moxo takes three rounds to two, with one section left unscored. Portability, AI review gates and a published price decide the rest, verified 14 to 23 September 2026.