vioscaleAI
Comparison

One API vs PromptLayer

On the evidence we track, PromptLayer leads this comparison with a composite score of 63/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

One API full profile →PromptLayer full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
One API46
★PromptLayer63
Score
vioscaleAI score
One API46 / 100medium · 54%
PromptLayer63 / 100medium · 72%
Pricing
Free tier
One API✓
PromptLayer✓
Model
One APIcommercial
PromptLayerfreemium
Price level
One APIfree
PromptLayermid
Starting price
One API–
PromptLayer$49
Transparent
One API–
PromptLayer✓
Integrations
Count
One API12
PromptLayer5
Security
Gdpr
One API–
PromptLayer✓
Hipaa
One API–
PromptLayer✓
Soc2
One API–
PromptLayer✓
Trust center
One APIhttps://github.com/security
PromptLayer–
Vulnerabilities
Adoption
Dependent repos
One API0
PromptLayer–
Github stars
One API37,155
PromptLayer–
Activity
Commits last 30d
One API0
PromptLayer–
Release
Cadence days
One API19
PromptLayer–
History
One API20 items
PromptLayer–
License
Spdx
One APIMIT
PromptLayer–
Language
Primary
One APIJavaScript
PromptLayer–
Market
Availability
Content
Faq
One API6 items
PromptLayer7 items

Capabilities

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

Capabilities
Openai compatible API
One API✓
PromptLayer✓
Automatic failover
One API✓
PromptLayer✓
Routing strategy
One APILoad based
PromptLayer-
Caching
One API-
PromptLayerExact
Virtual key management
One API✓
PromptLayer-
Budget spend controls
One API✓
PromptLayer-
Rate limiting
One API✓
PromptLayer✓
Guardrails moderation
One API-
PromptLayer-
Request cost observability
One API✓
PromptLayer✓
Streaming support
One API✓
PromptLayer✓
Deployment model
One APISelf hosted
PromptLayerManaged SaaS
Open source
One API✓
PromptLayer✓
Pricing model
One APIOpen source self host
PromptLayerusage/seat-based-saas

What each one is

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

One API

An open-source system for managing and redistributing API access across multiple large language model providers—including OpenAI, Claude, Gemini, and others—through a single OpenAI-compatible API. Deploys as a self-contained binary or Docker container.

Independently observed

PromptLayer

Leader

A platform that maintains logs of prompts and API requests, enabling debugging and replay of previous completions. Provides version tracking, testing, and monitoring with integrated tracing and evaluation features.

Independently observed

Pricing

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

One API

Open sourceFree tier
as of verify ↗

PromptLayer

Leader
from $49/moHybridFree tier

Free tier available. Pro starts at $49/month, Team at $500/month, both with usage-based billing ($0.002–$0.003 per transaction). Enterprise custom pricing.

  • FreeFree
    • 5 Users
    • 2.5k/month Requests
    • 1 Workspace
    • 250/month Eval Cell Executions
    • 10MB max per Dataset
    • +1 more
  • Pro$49/month plus $0.003/transaction
    • Unlimited Playgrounds
    • Unlimited Workspaces
    • 150MB max per Dataset
    • Webhooks Included
    • Dedicated Support
  • Team$500/month plus $0.002/transaction
    • 25 Users
    • 100k+/month Requests
    • 7.5k+/month Eval Cell Executions
    • 1GB max per Dataset
    • Webhooks Included
    • +2 more
  • EnterpriseContact sales
    • Custom limits on everything
    • Role Based Access Controls
    • Deployment Approvals
    • HIPAA with BAA
    • Flexible Hosting Options
    • +2 more
as of verify ↗

Platform & deployment

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

Platforms
Web
One API✓
PromptLayer✓
Deployment
Cloud / SaaS
One API✗
PromptLayer✓
Self-hosted
One API✓
PromptLayer✗

Integrations

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

In common (2)
  • OpenAI
  • Azure OpenAI

One API

26 total - 24 not shared
  • Anthropic Claude
  • Google Gemini
  • DeepSeek
  • ByteDance Douyin
  • ChatGLM
  • Baidu ERNIE Bot
  • iFLYTEK Spark
  • Alibaba Tongyi Qianwen
  • 360 Brain
  • Tencent Hunyuan
  • Cloudflare Gateway
  • Alibaba Qwen
  • Tencent Yuan
  • Baidu Wenxin
  • Byte Doubao
  • 360 AI Brain
  • Claude
  • Gemini
  • Doubao
  • Ernie
  • Spark
  • Qwen
  • 360 Smart Brain
  • Hunyuan
Independently observed

PromptLayer

Leader
9 total - 7 not shared
  • Pydantic AI
  • Anthropic
  • Google GenAI
  • AWS Bedrock
  • OpenTelemetry
  • Vertex AI
  • Gemini API
Independently observed
Still deciding?

One API or PromptLayer: 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.