Comparison

OpenRouter vs TensorZero

On the evidence we track, OpenRouter leads this comparison with a composite score of 80/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

OpenRouter full profile →TensorZero full profile →

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★OpenRouter80

TensorZero47

Attribute comparison across 2 tools
Attribute	OpenRouterLeader	TensorZero
Vioscale score	80 / 100low · 36%updating	47 / 100low · 21%updating
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	open_source
Price levelpricing.price_level	low	free
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	80	3
Security
Gdprsecurity.gdpr	✓	-
Vulnerabilitiessecurity.vulnerabilities	-	Count: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=tensorzero&per_page=100 · Last 12m: 1 · Max severity: HIGH
Adoption
Dependent reposadoption.dependent_repos	-	0
Github starsadoption.github_stars	-	11,719
Release
Cadence daysrelease.cadence_days	-	6
Historyrelease.history	-	20 items
License
Spdxlicense.spdx	-	Apache-2.0
Language
Primarylanguage.primary	-	Rust
Market
Availabilitymarket.availability	Available worldwide	-

Score

Vioscale score

OpenRouter80 / 100low · 36%updating

TensorZero47 / 100low · 21%updating

Pricing

Free tier

OpenRouter✓

TensorZero✓

Model

OpenRouterfreemium

TensorZeroopen_source

Price level

OpenRouterlow

TensorZerofree

Transparent

OpenRouter✓

TensorZero–

Integrations

Count

OpenRouter80

TensorZero3

Security

Gdpr

OpenRouter✓

TensorZero–

Vulnerabilities

OpenRouter–

TensorZeroCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=tensorzero&per_page=100 · Last 12m: 1 · Max severity: HIGH

Adoption

Dependent repos

OpenRouter–

TensorZero0

Github stars

OpenRouter–

TensorZero11,719

Release

Cadence days

OpenRouter–

TensorZero6

History

OpenRouter–

TensorZero20 items

License

Spdx

OpenRouter–

TensorZeroApache-2.0

Language

Primary

OpenRouter–

TensorZeroRust

Market

Availability

OpenRouterAvailable worldwide

TensorZero–

Capabilities

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

Capability comparison for Llm Gateways
Capability	OpenRouter	TensorZero
Capabilities
Openai compatible API	✓	✓
Automatic failover	✓	-
Routing strategy	Cost based	-
Caching	Exact	-
Virtual key management	✓	✓
Budget spend controls	✓	-
Rate limiting	✓	-
Guardrails moderation	-	-
Request cost observability	✓	✓
Streaming support	✓	-
Deployment model	Managed SaaS	Self hosted
Open source	✓	✓
Pricing model	Usage based saas	Open source self host

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

Leader

OpenRouter aggregates 500+ language models from 80+ providers through a single, OpenAI-compatible API interface. It offers automatic fallback routing, cost control, usage analytics, and data policy management for teams deploying AI applications at scale.

Independently observed

TensorZero

A unified operations platform for LLM applications that provides infrastructure for routing API calls, tracking performance metrics, running experiments, and optimizing model and prompt configurations. Built as self-hosted open-source software designed for production-scale deployments.

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

Leader

HybridFree tier

Free tier available. Pay-as-you-go at 5.5% platform fee. Enterprise from $25k/month.

FreeFree
- 25+ free models
- 4 free providers
- Chat and API access
- Community support
Pay-as-you-go5.5% platform fee on model usage, fee discounts available
- 500+ models from 80+ providers
- Automatic fallback routing
- Activity logs and export
- Auto-routing and preferred vendor selection
- Budgets and spend controls
- +4 more
EnterpriseContact sales
- 500+ models, 80+ providers
- Custom data policies and model/provider routing policies
- Managed policy enforcement
- SSO/SAML authentication
- Contractual SLAs
- +5 more

as of 2026-08-21verify ↗

TensorZero

Open sourceFree tier

as of 2026-08-21verify ↗

Platform & deployment

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

Platform and deployment support comparison
Supports	OpenRouter	TensorZero
WebPlatforms	✓	✓
CLIPlatforms	✓	✗
Cloud / SaaSDeployment	✓	✗
Self-hostedDeployment	✗	✓

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

Leader

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

3 total - 2 not shared

Ollama
Slack

Independently observed

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