Envoy AI Gateway vs PromptLayer
No clear leader: PromptLayer (63.3) and Envoy AI Gateway (59.3) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for llm gateways. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Envoy AI Gateway
An open-source gateway built on Envoy that centralizes AI traffic management by forwarding OpenAI-compatible requests to various LLM providers with automatic failover, token-based rate limiting, and Kubernetes-native deployment.
PromptLayer
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.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Envoy AI Gateway
Open-source. Commercial managed hosting and enterprise self-hosted options available.
PromptLayer
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
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- OpenAI
- AWS Bedrock
- Azure OpenAI
- Anthropic
Envoy AI Gateway
- Google Vertex AI
- Google Gemini
- Groq
- Together AI
- Mistral
- Cohere
- DeepInfra
- DeepSeek
- Hunyuan
- Tencent LLM Knowledge Engine
- SambaNova
- Grok
- OIDC
- cert-manager
- GCP Vertex AI
- Gemini
- vLLM
- MCP
- Kubernetes
- AWS STS
- Entra ID
- Google STS
- Google Vertex
- Model Context Protocol
PromptLayer
- Pydantic AI
- Google GenAI
- OpenTelemetry
- Vertex AI
- Gemini API
Envoy AI Gateway 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.