RelayPlane vs Unify.ai
Unify.ai is a Python-based LLM routing and benchmarking gateway with live provider benchmarks and custom router training. RelayPlane is an MIT-licensed npm package that runs on localhost with no account required. Here is how they compare for Node.js developers and AI agent builders.
TL;DR
Choose RelayPlane when you want:
- npm install and running in 30 seconds, no account
- Local SQLite cost tracking with no data leaving your machine
- MIT open source with no monthly fee or API call caps
- Claude Code and Cursor integration with one baseURL swap
- Node.js and TypeScript workflow, not Python-only tooling
Unify.ai may work for you if you need:
- Live benchmark data updated every 10 minutes across providers and regions
- Custom router training on your own prompt dataset
- Python SDK with a model@provider routing syntax
- Quality, speed, and cost weight routing from a managed cloud service
Feature Comparison
| Feature | RelayPlane | Unify.ai |
|---|---|---|
| Product type RelayPlane is a local proxy you install via npm and run on localhost. Unify.ai is a cloud-hosted gateway with a Python SDK, focused on live benchmarking and quality-driven routing across providers. | npm-native LLM proxy (local-first) | Hosted LLM routing and benchmarking gateway (Python-first) |
| Install method RelayPlane ships as an npm package: one command and you are proxying requests. Unify.ai provides a Python SDK (pip install unifyai). Node.js users must call the Unify API directly over HTTP or via the OpenAI SDK with a base URL override. | npm install -g @relayplane/proxy | pip install unifyai (Python SDK only, no npm package) |
| No account required RelayPlane starts with no signup, no credit card, and no cloud dependency. Unify.ai requires account creation and email verification to receive an API key before making any requests. | ||
| Free tier RelayPlane has no request cap or free tier limit. Unify.ai gives 100 API units on free signup, which is consumed quickly in active development sessions. | MIT open source, fully free to self-host | 100 API units on email signup (no credit card required) |
| Pricing (entry paid tier) RelayPlane has no paid gateway tier. Unify.ai's Pro plan is $99/month for 20,000 API calls, with higher tiers at $199/month (Ultra, 50,000 calls) and $299/month (Mega, 100,000 calls). | MIT open source, free self-hosted | $99/month (Pro, 20,000 API calls) |
| Works with Claude Code and Cursor RelayPlane is designed for Claude Code, Cursor, Windsurf, and Aider with direct integration docs. Unify.ai exposes an OpenAI-compatible API that can be wired up manually, but coding assistant integration is not a documented use case. | Via OpenAI-compatible API (manual HTTP config, not documented for coding assistants) | |
| Local SQLite cost tracking RelayPlane logs every request's exact dollar cost in local SQLite with no data leaving your machine. Unify.ai provides a cloud observability dashboard, but all data is sent to their platform. | ||
| No data leaves your machine RelayPlane runs entirely on localhost by default. Unify.ai is a hosted cloud gateway: all requests and telemetry pass through their infrastructure. | ||
| Complexity-based model routing RelayPlane routes simple tasks to cheaper models based on request complexity. Unify.ai routes based on configurable quality, speed, and cost weights using continuously updated live benchmarks (refreshed approximately every 10 minutes). | Quality, speed, and cost weight routing with live benchmark data | |
| Custom router training Unify.ai lets you upload your own prompt dataset and train a router tuned to your specific task. RelayPlane uses complexity-based routing without custom dataset training. | ||
| Live provider benchmarks Unify.ai continuously benchmarks models across providers, regions, and concurrency levels, updating approximately every 10 minutes. RelayPlane does not maintain live benchmark data. | ||
| Open source license RelayPlane is MIT licensed. Unify.ai's routing infrastructure is a closed commercial service. The unifyai Python SDK is published on PyPI but the backend is not open source. | MIT | Commercial (hosted service, Python SDK is open source) |
Why Node.js Developers Choose RelayPlane Over Unify.ai
One npm command vs a Python install, an account, and an API key
npm install -g @relayplane/proxy and you are proxying LLM requests in under 30 seconds. Unify.ai requires creating an account, verifying your email, receiving an API key, and installing their Python SDK. For Node.js developers and AI agent builders who want to move fast, the friction difference is measured in hours. And if you are not a Python shop, Unify.ai has no npm package at all: you must call their API over raw HTTP.
MIT open source vs $99 to $299 per month
RelayPlane is MIT licensed and costs nothing to self-host. Unify.ai's free tier gives you 100 API units on signup, which a single active Claude Code session can exhaust before lunch. Their paid plans start at $99/month for 20,000 API calls, scaling to $199/month and $299/month at higher volumes. If you are running a busy AI agent pipeline, those costs add up on top of your existing provider bills.
Your data stays local. No cloud intermediary.
RelayPlane runs entirely on localhost. Every request log, every cost record, every token count lives in a local SQLite file on your machine. Unify.ai is a cloud-hosted gateway: every request you make passes through their infrastructure, and telemetry goes to their observability dashboard. If you want local-first cost tracking without a third-party cloud in the request path, RelayPlane is the only npm-native option.
Built for Node.js coding assistants. Not just Python ML workflows.
Unify.ai's SDK is Python-first. Their documentation, examples, and benchmarking tools target Python developers working on ML pipelines and model evaluation. That is a real and valuable use case. But if you are a TypeScript developer using Claude Code or Cursor, RelayPlane was designed for your workflow: npm install, baseURL swap, and intelligent model routing with per-request cost tracking running on localhost.
Unify.ai Solves Benchmarking Problems. RelayPlane Solves Developer Cost Problems.
Unify.ai is a genuinely useful product for Python developers who need live provider benchmarks and quality-driven routing. Its continuously updated benchmark data across providers, regions, and concurrency levels is a real differentiator. If you are a data scientist or ML engineer evaluating models on custom datasets, the custom router training feature is worth investigating.
But if you are a Node.js developer or AI agent builder who wants to start proxying LLM requests today, without a Python install, without an account, without API call caps, and without sending your request logs to a cloud platform, Unify.ai is not the right fit. RelayPlane installs in one npm command, runs on localhost, and logs every request's exact dollar cost in local SQLite. No signup. No billing. No cloud.
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