vioscaleAI
Comparison

Fission vs Vercel Functions

On the evidence we track, Vercel Functions leads this comparison with a composite score of 90/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Fission full profile →Vercel Functions full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Fission54
★Vercel Functions90
Score
vioscaleAI score
Fission54 / 100medium · 54%
Vercel Functions90 / 100medium · 62%
Pricing
Free tier
Fission✓
Vercel Functions✓
Model
Fissionopen_source
Vercel Functionsfreemium
Price level
Fissionfree
Vercel Functionslow
Starting price
Fission–
Vercel Functions$1.20
Transparent
Fission✓
Vercel Functions✓
Integrations
Count
Fission6
Vercel Functions–
Security
Disclosure policy
Fission–
Vercel Functions✓
Gdpr
Fission–
Vercel Functions✓
Hipaa
Fission–
Vercel Functions✓
Iso27001
Fission–
Vercel Functions✓
Pci
Fission–
Vercel Functions✓
Scorecard
Fission7.7
Vercel Functions–
Soc2
Fission–
Vercel Functions✓
Trust center
Fission–
Vercel Functionshttps://vercel.com/docs/security
Vulnerabilities
Reliability
Sla pct
Fission–
Vercel Functions99.99
Status page
Fission–
Vercel Functions✓
Adoption
Dependent repos
Fission3
Vercel Functions–
Github stars
Fission8,933
Vercel Functions–
Activity
Commits last 30d
Fission60
Vercel Functions–
Release
Cadence days
Fission24
Vercel Functions–
History
Fission20 items
Vercel Functions–
License
Spdx
FissionApache-2.0
Vercel Functions–
Language
Primary
FissionGo
Vercel Functions–
Market
Availability
Fission–
Vercel FunctionsAvailable worldwide
Content
Faq
Fission6 items
Vercel Functions5 items

Capabilities

Feature-by-feature on the axes that matter for serverless & edge platforms. “-” means undocumented, not absent.

Core
Execution substrate
FissionContainer
Vercel Functions-
Language / runtime breadth
FissionPython, NodeJS, Go, Rust, C#, PHP (extensible to any language)
Vercel FunctionsNode.js, Python, Go, and more
Reach
Runs at global edge PoPs
Fission✗
Vercel Functions✓
Scale
Scale to zero
Fission✓
Vercel Functions✓
Performance
Cold-start profile
FissionProvisioned concurrency
Vercel FunctionsLow
Limits
Max execution duration
Fission-
Vercel Functions-
Integration
Event source breadth
FissionHTTP and event triggers
Vercel FunctionsHTTP (GET, POST)
HTTP endpoint trigger
Fission✓
Vercel Functions✓
Cron / scheduled invocations
Fission✓
Vercel Functions-
State
Durable state / workflow primitive
Fission-
Vercel Functions-
Flexibility
Bring-your-own runtime / container
Fission✓
Vercel Functions-
Deployment
Hosting
FissionCloud + self-hosted
Vercel FunctionsCloud only
Ops
Built-in logs / metrics / tracing
Fission✓
Vercel Functions✓
Extensibility
CLI + IaC / framework support
Fission✓
Vercel Functions✓

What each one is

The product in its own terms, so the numbers below have context.

Fission

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.

Independently observed

Vercel Functions

Leader

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.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Fission

Open sourceFree tier

Free, open source under Apache License

as of verify ↗

Vercel Functions

Leader
from $1.20/M eventsHybridFree tier

Hobby free tier. Pro monthly subscription with 1M invocations included. Usage-based pricing for overages and add-on services.

  • HobbyFree
    • 12K function invocations/month
    • Image optimization
    • Speed Insights
    • Web Analytics
  • ProMonthly. 1M included invocations. Usage-based overages.
    • 1M function invocations included
    • Usage-based pricing for overages
    • Observability Plus option
    • Multiple runtime support
  • EnterpriseContact sales
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Fission✗
Vercel Functions✓
CLI
Fission✓
Vercel Functions✓
Deployment
Cloud / SaaS
Fission✗
Vercel Functions✓
Self-hosted
Fission✓
Vercel Functions✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Fission

6 total
  • Kubernetes
  • Istio
  • Fluentd
  • Prometheus
  • Grafana
  • MCP
Independently observed

Vercel Functions

Leader

Not documented yet.

Still deciding?

Fission or Vercel Functions: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.