# Azure Functions vs Fission

**Leader by vioscaleAI score:** Fission

| Attribute | Azure Functions | Fission |
|---|---|---|
| **vioscaleAI score** | 44.4 (30% (low)) | 53.5 (54% (medium)) |
| activity.commits_last_30d | - | 60 |
| adoption.dependent_repos | - | 3 |
| adoption.github_stars | - | 8,933 |
| content.faq | `[{"answer":"A cloud platform for building and running applications composed of small, independent functions triggered by events, supporting multiple programming languages and eliminating the need to manage infrastructure. It is indexed under Serverless & Edge Platforms.","source":"https://azure.microsoft.com/en-us/pricing/","question":"What is Azure Functions?","confidence":0.6},{"answer":"Azure Functions offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://azure.microsoft.com/en-us/products/functions","question":"Is Azure Functions free?","confidence":0.6},{"answer":"We have confirmed browser-based access to Azure Functions. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://azure.microsoft.com/en-us/pricing/","question":"What platforms does Azure Functions support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Azure Functions, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://azure.microsoft.com/en-us/pricing/","question":"Can Azure Functions be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Azure Functions. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Azure Functions not holding them. Always confirm compliance directly before you rely on it.","source":"https://azure.microsoft.com/en-us/explore/trusted-cloud/","question":"What security certifications does Azure Functions have?","confidence":0.7}]` | `[{"answer":"Developers write short-lived functions that are triggered by HTTP requests or events, while the framework handles Kubernetes infrastructure management automatically. This eliminates the need to manually build containers or manage registries. It is indexed under Serverless & Edge Platforms.","source":"https://fission.io","question":"What is Fission?","confidence":0.6},{"answer":"Fission is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://fission.io","question":"Is Fission free to use?","confidence":0.6},{"answer":"Fission supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://fission.io","question":"What platforms does Fission support?","confidence":0.6},{"answer":"Yes. Fission can be deployed cloud / SaaS, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://fission.io","question":"Can Fission be self-hosted?","confidence":0.6},{"answer":"We have confirmed 6 integrations for Fission, including Kubernetes, Istio, Fluentd, Prometheus, Grafana and MCP. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://fission.io","question":"What does Fission integrate with?","confidence":0.6},{"answer":"Yes. Fission is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/fission/fission","question":"Is Fission open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true}` | `{"self_hosted":true}` |
| description.long | A cloud-based serverless compute service that executes code in response to events, supporting multiple programming languages and letting developers focus on business logic rather than infrastructure management. | An open-source framework for building and deploying serverless functions on Kubernetes with automatic scaling. Supports multiple programming languages and can be triggered by HTTP requests, message queue events, and scheduled tasks. |
| features.capabilities | `{"hosting":"cloud","triggers":"event-driven","languages":".NET, Java, Python, Node.js, and additional languages supported","observability_builtin":true}` | `{"hosting":"both","triggers":"HTTP and event triggers","languages":"Python, NodeJS, Go, Rust, C#, PHP (extensible to any language)","cold_start":"provisioned","cli_and_iac":true,"http_trigger":true,"scale_to_zero":true,"custom_runtime":true,"scheduled_cron":true,"edge_distributed":false,"runtime_substrate":"container","observability_builtin":true}` |
| integrations.count | - | 6 |
| integrations.list | - | `[{"name":"Kubernetes"},{"name":"Istio"},{"name":"Fluentd"},{"name":"Prometheus"},{"name":"Grafana"},{"name":"MCP"}]` |
| language.primary | - | Go |
| license.spdx | - | Apache-2.0 |
| platform.support | `{"web":true}` | `{"cli":true}` |
| pricing | `{"type":"usage","summary":"Consumption-based pricing","sourceUrl":"https://azure.microsoft.com/en-us/products/functions","retrievedAt":"2026-08-01T15:33:43.454Z"}` | `{"type":"open_source","summary":"Free, open source under Apache License","freeTier":true,"sourceUrl":"https://fission.io","retrievedAt":"2026-08-14T09:18:36.308Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | unknown | free |
| pricing.transparent | - | yes |
| release.cadence_days | - | 24 |
| release.history | - | `[{"url":"https://github.com/fission/fission/releases/tag/v1.27.0","date":"2026-06-22T15:02:22Z","type":"stable","version":"v1.27.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.26.0","date":"2026-06-13T11:47:51Z","type":"prerelease","version":"v1.26.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.25.0","date":"2026-06-05T11:49:37Z","type":"stable","version":"v1.25.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.24.0","date":"2026-05-26T19:01:42Z","type":"prerelease","version":"v1.24.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.23.0","date":"2026-05-15T04:57:05Z","type":"stable","version":"v1.23.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.22.0","date":"2025-12-18T17:01:59Z","type":"stable","version":"v1.22.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.22.0-rc2","date":"2025-12-15T11:49:48Z","type":"prerelease","version":"v1.22.0-rc2"},{"url":"https://github.com/fission/fission/releases/tag/v1.21.0","date":"2025-01-25T16:56:09Z","type":"stable","version":"v1.21.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.21.0-rc2","date":"2025-01-24T05:32:02Z","type":"prerelease","version":"v1.21.0-rc2"},{"url":"https://github.com/fission/fission/releases/tag/v1.21.0-rc1","date":"2025-01-15T17:44:45Z","type":"prerelease","version":"v1.21.0-rc1"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.5","date":"2024-10-04T13:27:46Z","type":"stable","version":"v1.20.5"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.4","date":"2024-09-02T12:14:30Z","type":"stable","version":"v1.20.4"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.3","date":"2024-08-09T10:32:49Z","type":"stable","version":"v1.20.3"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.2","date":"2024-05-27T13:41:29Z","type":"stable","version":"v1.20.2"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.1","date":"2024-01-15T04:59:55Z","type":"stable","version":"v1.20.1"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.0","date":"2023-11-30T16:29:49Z","type":"stable","version":"v1.20.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.0-rc2","date":"2023-11-27T10:57:09Z","type":"prerelease","version":"v1.20.0-rc2"},{"url":"https://github.com/fission/fission/releases/tag/v1.20.0-rc1","date":"2023-10-30T14:51:08Z","type":"prerelease","version":"v1.20.0-rc1"},{"url":"https://github.com/fission/fission/releases/tag/v1.19.0","date":"2023-05-19T04:32:34Z","type":"stable","version":"v1.19.0"},{"url":"https://github.com/fission/fission/releases/tag/v1.19.0-rc2","date":"2023-05-12T06:15:59Z","type":"prerelease","version":"v1.19.0-rc2"}]` |
| reliability.status_page | yes | - |
| security.gdpr | yes | - |
| security.scorecard | - | 7.7 |
| security.trust_center | https://azure.microsoft.com/en-us/explore/security/ | - |
| security.vulnerabilities | - | `{"count":18,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Ffission%2Ffission&per_page=100","last_12m":18,"max_severity":"CRITICAL"}` |

## Capabilities (Serverless & Edge Platforms)

| Capability | Azure Functions | Fission |
|---|:--:|:--:|
| **Core** |  |  |
| Execution substrate | - | Container |
| Language / runtime breadth | .NET, Java, Python, Node.js, and additional languages supported | Python, NodeJS, Go, Rust, C#, PHP (extensible to any language) |
| **Reach** |  |  |
| Runs at global edge PoPs | - | ✗ |
| **Scale** |  |  |
| Scale to zero | - | ✓ |
| **Performance** |  |  |
| Cold-start profile | - | Provisioned concurrency |
| **Limits** |  |  |
| Max execution duration | - | - |
| **Integration** |  |  |
| Event source breadth | event-driven | HTTP and event triggers |
| HTTP endpoint trigger | - | ✓ |
| Cron / scheduled invocations | - | ✓ |
| **State** |  |  |
| Durable state / workflow primitive | - | - |
| **Flexibility** |  |  |
| Bring-your-own runtime / container | - | ✓ |
| **Deployment** |  |  |
| Hosting | Cloud only | Cloud + self-hosted |
| **Ops** |  |  |
| Built-in logs / metrics / tracing | ✓ | ✓ |
| **Extensibility** |  |  |
| CLI + IaC / framework support | - | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T18:10:07.584Z. "-" = undocumented, not absent.*