Send every request to the right AI model.
Relay Link is one API that routes each prompt to the model that answers it best, fastest, and cheapest — and switches automatically when a provider goes down.
Try the router
Smart routing
Rules or learned policies pick a model per request, based on task, language, length, and your budget.
Automatic failover
If a provider slows down or errors, Relay Link retries on a backup in under 200 ms. Your users never notice.
One bill, full visibility
See cost, latency, and quality for every model in a single dashboard. Set spend limits per team.
Cut AI spend by up to 42% without changing your code.
Swap one base URL and keep your existing SDK. Most teams are live in an afternoon.
View pricingThe platform
Everything between your app and the models, in one layer.
Unified API
One endpoint, one format. Works with 40+ models from every major provider and your own hosted ones.
Policy engine
Write routing rules in plain YAML or let Relay Link learn from your quality scores.
Guardrails
Redact personal data, block unsafe outputs, and keep an audit log of every call.
Caching
Semantic caching returns repeated answers instantly and removes duplicate spend.
Evaluations
Test new models on your real traffic before you switch. Roll out with a percentage split.
Observability
Trace every request end to end. Export to your existing monitoring tools.
Integrate in three lines
from openai import OpenAI
client = OpenAI(base_url="https://api.relaylink.ai/v1", api_key="RL_KEY")
reply = client.chat.completions.create(model="auto", messages=[{"role": "user", "content": "Summarize this contract"}])
Solutions
Built for teams that run AI in production.
Customer support
Send simple tickets to compact models and hard cases to reasoning models. Typical result: 38% lower cost per ticket.
Financial services
Keep data in-region, redact account numbers, and log every decision for auditors.
Software teams
Route code tasks to the best coding model and fall back during outages so builds never stall.
Healthcare
HIPAA-ready deployment with private routing and strict retention controls.
Retail and e-commerce
Generate product copy in 30 languages and translate reviews at a fraction of the price.
Legal
Match long-document tasks to long-context models and keep a citation trail for each answer.
Simple pricing
Pay for the platform. Model usage is billed at cost, with no markup.
Growth
- Up to 5M requests
- All 40+ models
- Failover and semantic caching
- Evaluations and guardrails
- Email support
Enterprise
- Unlimited requests
- Private and in-region routing
- SSO and audit logs
- 99.99% uptime SLA
- Dedicated engineer
| Feature | Starter | Growth | Enterprise |
|---|---|---|---|
| Automatic failover | — | Yes | Yes |
| Semantic caching | — | Yes | Yes |
| Personal data redaction | — | Yes | Yes |
| SSO and audit logs | — | — | Yes |
| Uptime SLA | — | 99.9% | 99.99% |
About Relay Link
We believe no company should be locked into one AI model.
Relay Link started in 2024, when our founders watched a single provider outage freeze a customer's entire support team. We built a routing layer so that could never happen again.
Today we handle more than 2 billion requests a month for 600 teams across 30 countries. Our 85 people work remotely from Helsinki, Berlin, London, and New York.
Neutral by design
We don't build our own models, so our only job is to send you to the best one.
Your data stays yours
We never train on your prompts, and you choose how long logs are kept.
Reliable first
Failover is a core feature, not an add-on. Our uptime for the last 12 months was 99.995%.
Talk to us
Tell us what you're building. We'll reply within one business day with a tailored demo.
Prefer email? Write to [email protected].