Workflow automation tools cover different problems, from data pipelines and event-driven orchestration to visual business automation. This ranking uses the supplied August 2026 ToolVitals data to compare 50 open or source-visible tools on project health, shipping activity, licensing, and overall ToolVitals score.
Tools are ordered by ToolVitals score first, with GitHub stars used only as a secondary popularity signal when scores are tied. The supplied ordering is authoritative; openness and licensing are reported using the provided labels rather than treating every source-visible project as open source.
Rankings
| Rank | Tool | Openness | License | Health | Shipping | GitHub Stars | Score | Status |
|---|---|---|---|---|---|---|---|---|
| 1 | Kestra | OSI-approved OSS | Apache-2.0 | 100 | 100 | 0 | 100 | 🟢 Excellent |
| 2 | Prefect | OSI-approved OSS | Apache-2.0 | 100 | 100 | 0 | 100 | 🟢 Excellent |
| 3 | n8n | Fair-code, not OSI-approved | NOASSERTION | 100 | 100 | 0 | 100 | 🟢 Excellent |
| 4 | Flyte | OSI-approved OSS | Apache-2.0 | 98 | 100 | 0 | 99 | 🟢 Excellent |
| 5 | Hatchet | OSI-approved OSS | MIT | 98 | 100 | 0 | 99 | 🟢 Excellent |
| 6 | Trigger.dev | OSI-approved OSS | Apache-2.0 | 98 | 100 | 0 | 99 | 🟢 Excellent |
| 7 | Activepieces | OSI-approved OSS | MIT | 96 | 100 | 0 | 98 | 🟢 Excellent |
| 8 | Tracecat | OSI-approved OSS | AGPL-3.0 | 96 | 98 | 0 | 98 | 🟢 Excellent |
| 9 | Dagu | OSI-approved OSS | GPL-3.0 | 95 | 98 | 0 | 97 | 🟢 Excellent |
| 10 | Conductor | OSI-approved OSS | Apache-2.0 | 95 | 100 | 0 | 96 | 🟢 Excellent |
| 11 | gh-aw | OSI-approved OSS | MIT | 92 | 95 | 0 | 95 | 🟢 Excellent |
| 12 | Kaoto | OSI-approved OSS | Apache-2.0 | 86 | 95 | 0 | 93 | 🟢 Excellent |
| 13 | LibreSign | OSI-approved OSS | AGPL-3.0 | 85 | 98 | 0 | 93 | 🟢 Excellent |
| 14 | Temporal | OSI-approved OSS | MIT | 92 | 86 | 0 | 92 | 🟢 Excellent |
| 15 | nodetool | OSI-approved OSS | AGPL-3.0 | 85 | 95 | 0 | 92 | 🟢 Excellent |
| 16 | PipesHub AI | OSI-approved OSS | Apache-2.0 | 87 | 89 | 0 | 91 | 🟢 Excellent |
| 17 | Node-RED | OSI-approved OSS | Apache-2.0 | 91 | 81 | 0 | 90 | 🟢 Excellent |
| 18 | epistola-suite | OSI-approved OSS | AGPL-3.0 | 84 | 95 | 0 | 90 | 🟢 Excellent |
| 19 | ByteChef | OSI-approved OSS | Apache-2.0 | 83 | 87 | 0 | 89 | 🟢 Excellent |
| 20 | Pneumatic | OSI-approved OSS | Apache-2.0 | 82 | 90 | 0 | 89 | 🟢 Excellent |
| 21 | Runtara | OSI-approved OSS | AGPL-3.0 | 79 | 95 | 0 | 89 | 🟢 Excellent |
| 22 | Bifrost Integrations | OSI-approved OSS | AGPL-3.0 | 80 | 90 | 0 | 88 | 🟢 Excellent |
| 23 | DBOS Transact Golang | OSI-approved OSS | MIT | 87 | 73 | 0 | 86 | 🟢 Excellent |
| 24 | OpenWorkflow | OSI-approved OSS | Apache-2.0 | 77 | 84 | 0 | 85 | 🟢 Excellent |
| 25 | FlowCtl | OSI-approved OSS | Apache-2.0 | 79 | 75 | 0 | 82 | 🟢 Excellent |
| 26 | MaaPipelineEditor | OSI-approved OSS | MIT | 79 | 73 | 368 | 81 | 🟢 Excellent |
| 27 | Viewflow | OSI-approved OSS | AGPL-3.0 | 76 | 60 | 0 | 76 | 🟢 Good |
| 28 | Rulego | OSI-approved OSS | Apache-2.0 | 72 | 65 | 1577 | 75 | 🟢 Good |
| 29 | Ordo | OSI-approved OSS | MIT | 63 | 67 | 31 | 74 | 🟢 Good |
| 30 | Huginn | OSI-approved OSS | MIT | 76 | 54 | 49756 | 73 | 🟢 Good |
| 31 | gflow | OSI-approved OSS | MIT | 70 | 60 | 86 | 73 | 🟢 Good |
| 32 | Flow | OSI-approved OSS | Apache-2.0 | 72 | 55 | 135 | 72 | 🟢 Good |
| 33 | Flowwink | OSI-approved OSS | MIT | 56 | 78 | 19 | 71 | 🟢 Good |
| 34 | diun | OSI-approved OSS | MIT | 68 | 53 | 0 | 70 | 🟢 Good |
| 35 | Ryax | OSI-approved OSS | MPL-2.0 | 67 | 45 | 186 | 69 | 🟢 Good |
| 36 | Lamda | OSI-approved OSS | MIT | 72 | 34 | 8088 | 67 | 🟢 Good |
| 37 | FlowGram | OSI-approved OSS | MIT | 70 | 27 | 8348 | 64 | 🟢 Good |
| 38 | Flowable Engine | OSI-approved OSS | Apache-2.0 | 62 | 41 | 9447 | 63 | 🟢 Good |
| 39 | Velda | OSI-approved OSS | Apache-2.0 | 60 | 36 | 83 | 63 | 🟢 Good |
| 40 | SymFlowBuilder | OSI-approved OSS | MIT | 60 | 27 | 28 | 59 | 🟡 Fair |
| 41 | Flux Workflow | OSI-approved OSS | MIT | 44 | 53 | 1 | 59 | 🟡 Fair |
| 42 | maestro | OSI-approved OSS | Apache-2.0 | 65 | 27 | 3811 | 58 | 🟡 Fair |
| 43 | Cenit IO | OSI-approved OSS | MIT | 56 | 21 | 502 | 53 | 🟡 Fair |
| 44 | Loopi | OSI-approved OSS | MIT | 38 | 30 | 188 | 50 | 🟡 Fair |
| 45 | Integuru | OSI-approved OSS | AGPL-3.0 | 46 | 7 | 4750 | 45 | 🟡 Fair |
| 46 | OpenRPA | OSI-approved OSS | MPL-2.0 | 41 | 0 | 3033 | 40 | 🟡 Fair |
| 47 | Infinitic | OSI-approved OSS | MIT | 33 | 4 | 362 | 37 | 🔴 Needs Attention |
| 48 | SurveyKing | OSI-approved OSS | MIT | 31 | 0 | 3990 | 36 | 🔴 Needs Attention |
| 49 | BubbleLab | OSI-approved OSS | Apache-2.0 | 36 | 0 | 1096 | 36 | 🔴 Needs Attention |
| 50 | Fluxturn | OSI-approved OSS | AGPL-3.0 | 31 | 0 | 33 | 34 | 🔴 Needs Attention |
Top 3 Highlights
Kestra ranks first with a ToolVitals score of 100, a health score of 100, and a shipping score of 100. Its focus is event-driven orchestration and scheduling for mission-critical applications. Kestra is labeled OSI-approved OSS under Apache-2.0.
Prefect ranks second with a ToolVitals score of 100 and perfect health and shipping scores. It is a Python workflow-orchestration framework aimed at building resilient data pipelines, making it the most directly data-pipeline-focused option among the top three. Prefect is labeled OSI-approved OSS under Apache-2.0.
n8n ranks third with a ToolVitals score of 100, a health score of 100, and a shipping score of 100. It combines visual workflow building with custom code, supports self-hosting and cloud deployment, and lists more than 400 integrations. Its openness label is Fair-code, not OSI-approved, and its license label is NOASSERTION.
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