vioscaleAI
Comparison

OpenRouter vs TensorZero

No leader: the top candidate OpenRouter has only 0.34 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

OpenRouter full profile →TensorZero full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
OpenRouter67
TensorZero56
Score
vioscaleAI score
OpenRouter67 / 100low · 34%
TensorZero56 / 100low · 48%
Pricing
Free tier
OpenRouter✓
TensorZero✓
Model
OpenRouterfreemium
TensorZeroopen_source
Price level
OpenRouterlow
TensorZerofree
Transparent
OpenRouter✓
TensorZero–
Integrations
Count
OpenRouter80
TensorZero4
Security
Gdpr
OpenRouter✓
TensorZero–
Trust center
OpenRouterhttps://openrouter.ai/privacy
TensorZero–
Vulnerabilities
Adoption
Dependent repos
OpenRouter–
TensorZero0
Github stars
OpenRouter–
TensorZero11,707
Release
Cadence days
OpenRouter–
TensorZero6
History
OpenRouter–
TensorZero20 items
License
Spdx
OpenRouter–
TensorZeroApache-2.0
Language
Primary
OpenRouter–
TensorZeroRust
Market
Availability
OpenRouterAvailable worldwide
TensorZero–
Content
Faq
OpenRouter6 items
TensorZero6 items

Capabilities

Feature-by-feature on the axes that matter for llm gateways. “-” means undocumented, not absent.

Capabilities
Openai compatible API
OpenRouter✓
TensorZero✓
Automatic failover
OpenRouter✓
TensorZero✓
Routing strategy
OpenRouterCost based
TensorZero-
Caching
OpenRouterExact
TensorZero-
Virtual key management
OpenRouter✓
TensorZero✓
Budget spend controls
OpenRouter✓
TensorZero-
Rate limiting
OpenRouter✓
TensorZero-
Guardrails moderation
OpenRouter-
TensorZero-
Request cost observability
OpenRouter✓
TensorZero✓
Streaming support
OpenRouter✓
TensorZero-
Deployment model
OpenRouterManaged SaaS
TensorZeroSelf hosted
Open source
OpenRouter✓
TensorZero✓
Pricing model
OpenRouterUsage based saas
TensorZeroOpen source self host

What each one is

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

OpenRouter

OpenRouter provides a unified, OpenAI-compatible API that consolidates access to over 500 language models from 80+ providers. It features automatic failover for reliability, cost-optimized routing, transparent provider pricing with modest platform fees, and support for multiple deployment and authentication methods.

Independently observed

TensorZero

A self-hosted platform that combines deployment, monitoring, evaluation, and optimization for language model applications. It enables teams to manage multiple model providers through a single interface, measure performance across different configurations, and automatically improve routing strategies and prompts.

Independently observed

Pricing

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

OpenRouter

HybridFree tier

Free tier with 50 requests/day, or pay-as-you-go at 5.5% markup

  • FreeFree
    • Chat and API access
    • 25+ free models
    • 4 free providers
    • 50 requests/day rate limit
    • Community support
  • Standard5.5% platform fee on provider pricing
    • Pay-as-you-go usage billing
    • 500+ models
    • 80+ providers
    • Email support
    • Budgets and spend controls
    • +2 more
  • BusinessContact sales
    • Fee discounts available
    • 500+ models
    • 80+ providers
    • Custom rate limits
    • Invoicing options
  • EnterpriseContact sales
    • Custom pricing
    • 500+ models
    • 80+ providers
    • Dedicated support team
    • Contractual SLAs
    • +2 more
as of verify ↗

TensorZero

Open source
as of verify ↗

Platform & deployment

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

Platforms
Web
OpenRouter✓
TensorZero✓
CLI
OpenRouter✓
TensorZero✗
Deployment
Cloud / SaaS
OpenRouter✓
TensorZero✗
Self-hosted
OpenRouter✗
TensorZero✓

Integrations

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

In common (1)
  • OpenAI

OpenRouter

11 total - 10 not shared
  • Vercel AI SDK
  • Claude Code
  • Cursor
  • OpenAI SDK
  • Anthropic
  • Google
  • Meta
  • Mistral
  • Model Context Protocol (MCP)
  • Terraform
Independently observed

TensorZero

4 total - 3 not shared
  • Ollama
  • Slack
  • Teams
Independently observed
Still deciding?

OpenRouter or TensorZero: 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.