# Fission vs Vercel Functions

**Leader by vioscaleAI score:** Vercel Functions

| Attribute | Fission | Vercel Functions |
|---|---|---|
| **vioscaleAI score** | 53.5 (54% (medium)) | 90.2 (62% (medium)) |
| activity.commits_last_30d | 60 | - |
| adoption.dependent_repos | 3 | - |
| adoption.github_stars | 8,933 | - |
| content.faq | `[{"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}]` | `[{"answer":"Build and deploy API routes, webhooks, and request handlers without managing servers. Functions automatically scale with traffic, support multiple programming languages, and include built-in observability. It is indexed under Serverless & Edge Platforms.","source":"https://vercel.com/docs/image-optimization/legacy-pricing","question":"What is Vercel Functions?","confidence":0.6},{"answer":"Vercel Functions offers a free tier, so you can start without paying. Paid plans are also available: Hobby and Pro. Pricing changes often, so verify at source before relying on it.","source":"https://vercel.com/docs/functions","question":"Is Vercel Functions free?","confidence":0.6},{"answer":"Vercel Functions supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://vercel.com/docs/image-optimization/legacy-pricing","question":"What platforms does Vercel Functions support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Vercel Functions, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://vercel.com/docs/image-optimization/legacy-pricing","question":"Can Vercel Functions be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Vercel Functions. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Vercel Functions not holding them. Always confirm compliance directly before you rely on it.","source":"https://vercel.com/security","question":"What security certifications does Vercel Functions have?","confidence":0.7}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | 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. | A serverless functions platform for building and deploying API routes, webhooks, and event handlers. Supports multiple runtimes with built-in observability and local testing via CLI. |
| features.capabilities | `{"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}` | `{"hosting":"cloud","triggers":"HTTP (GET, POST)","languages":"Node.js, Python, Go, and more","cold_start":"low","cli_and_iac":true,"http_trigger":true,"scale_to_zero":true,"edge_distributed":true,"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 | - |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","summary":"Free, open source under Apache License","freeTier":true,"sourceUrl":"https://fission.io","retrievedAt":"2026-08-14T09:18:36.308Z"}` | `{"type":"hybrid","plans":[{"free":true,"name":"Hobby","summary":"Free","features":["12K function invocations/month","Image optimization","Speed Insights","Web Analytics"],"description":"Free tier with limited included resources","contactSales":false,"includedLimits":{"function_invocations":"12k/mo","image_transformations":"5k/mo","speed_insights_events":"10k"}},{"free":false,"name":"Pro","summary":"Monthly. 1M included invocations. Usage-based overages.","features":["1M function invocations included","Usage-based pricing for overages","Observability Plus option","Multiple runtime support"],"commitment":"monthly","components":[{"per":{"qty":1,"unit":"M invocations"},"kind":"metered","amount":2.75,"currency":"USD"},{"per":{"qty":1,"unit":"M events"},"kind":"metered","amount":1.2,"currency":"USD"}],"description":"Monthly subscription with high invocation limit and usage-based overages","contactSales":false,"includedLimits":{"function_invocations":"1M/mo"}},{"free":false,"name":"Enterprise","summary":"Custom pricing","description":"Custom pricing and capabilities","contactSales":true}],"addOns":[{"name":"Observability Plus","components":[{"per":{"qty":1,"unit":"M events"},"kind":"metered","amount":1.2,"currency":"USD"}]},{"name":"Web Analytics Plus"},{"name":"Speed Insights","components":[{"per":{"qty":10000,"unit":"events"},"kind":"metered","amount":0.65,"currency":"USD"}]}],"summary":"Hobby free tier. Pro monthly subscription with 1M invocations included. Usage-based pricing for overages and add-on services.","currency":"USD","freeTier":true,"sourceUrl":"https://vercel.com/docs/pricing","retrievedAt":"2026-10-05T11:05:59.418Z","startingPrice":{"unit":"M events","amount":1.2,"currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | low |
| pricing.starting_price | - | `{"amount":1.2,"currency":"USD"}` |
| pricing.transparent | yes | 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.sla_pct | - | 99.99 |
| reliability.status_page | - | yes |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.pci | - | yes |
| security.scorecard | 7.7 | - |
| security.soc2 | - | yes |
| security.trust_center | - | https://vercel.com/docs/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 | Fission | Vercel Functions |
|---|:--:|:--:|
| **Core** |  |  |
| Execution substrate | Container | - |
| Language / runtime breadth | Python, NodeJS, Go, Rust, C#, PHP (extensible to any language) | Node.js, Python, Go, and more |
| **Reach** |  |  |
| Runs at global edge PoPs | ✗ | ✓ |
| **Scale** |  |  |
| Scale to zero | ✓ | ✓ |
| **Performance** |  |  |
| Cold-start profile | Provisioned concurrency | Low |
| **Limits** |  |  |
| Max execution duration | - | - |
| **Integration** |  |  |
| Event source breadth | HTTP and event triggers | HTTP (GET, POST) |
| HTTP endpoint trigger | ✓ | ✓ |
| Cron / scheduled invocations | ✓ | - |
| **State** |  |  |
| Durable state / workflow primitive | - | - |
| **Flexibility** |  |  |
| Bring-your-own runtime / container | ✓ | - |
| **Deployment** |  |  |
| Hosting | Cloud + self-hosted | Cloud only |
| **Ops** |  |  |
| Built-in logs / metrics / tracing | ✓ | ✓ |
| **Extensibility** |  |  |
| CLI + IaC / framework support | ✓ | ✓ |

*Source: vioscaleAI. Generated 2026-10-16T19:03:32.772Z. "-" = undocumented, not absent.*