Unified model gateway
Use one OpenAI SDK-compatible endpoint to access 300+ models across 30+ providers, with provider/model strings and support for text, image, voice, and video workloads.
Opper AI
Opper AI is an EU-hosted AI gateway for accessing 300+ models through an OpenAI SDK-compatible API, with optional control-plane features for routing, observability, guardrails, and compliance. It is aimed at developers and teams that want to run AI applications and agents with pay-as-you-go billing and production governance.
European AI gateway and control plane for agents
Opper AI is an EU-hosted AI gateway and control plane for teams building agents and other AI applications. It provides a single OpenAI SDK-compatible API for accessing 300+ models from multiple providers, including support for streaming, tool calls, and provider-native prompt caching.
The product is positioned for developers who want to switch models without changing application code, and for teams that need production controls such as observability, routing, guardrails, compliance policies, and audit trails. Gateway covers model access and billing, while the optional Control Plane adds governance features for production deployments.
Core capabilities
Routing and failover
Set fallback model lists per request, pin explicit models, or define defaults per org, project, or function so model changes can be made without redeploying code.
Observability and tracing
Capture call-level and session-level data such as model, tokens, latency, cost, status, conversation flow, quality scores, and anomalies when observability is enabled.
Guardrails and policy enforcement
Apply infrastructure-level policies for PII masking, content filtering, input/output validation, tool call restrictions, prompt injection detection, and custom rules.
Compliance controls
Control budgets, model allowlists, rate limits, and retention policies, including ZDR-only mode and configurable data retention on enterprise plans.
Pay-as-you-go billing
Top up credits manually or set up auto top-up; Gateway pricing passes through provider rates with a 3% fee on credit purchases, while Control Plane raises that fee to 5.5%.
Common ways teams use Opper AI
Migrate an OpenAI-compatible app
Connect an existing application to Opper by swapping the base URL and API key, then keep using OpenAI-style request patterns for completions, streaming, and tool calls.
Operate multi-model production workloads
Route requests across providers or regions, set fallbacks, and pin model defaults for specific organizations, projects, or functions without redeploying code.
Monitor agent behavior and cost
Add observability for agent traffic by tracing calls, reviewing quality scores, and investigating regressions or cost anomalies at the session level.
Enforce guardrails on sensitive workflows
Apply PII masking, content filtering, input/output validation, and prompt-injection defenses before data reaches the model.
Manage governance for regulated teams
Use model allowlists, budget caps, retention controls, and audit logs to support compliance reviews and data-governance requirements.
Pros and Cons
Pros
- Access to 300+ models from 30+ providers through one API.
- OpenAI SDK compatibility makes migration from existing code comparatively simple.
- Gateway pricing passes through provider rates with no markup on token usage.
- EU hosting in AWS Stockholm supports GDPR and EU residency requirements.
- Control Plane adds concrete production features including routing, observability, guardrails, and compliance controls.
Cons
- Control Plane features are optional and add extra platform fees, plus Observe is billed separately per use.
- Some enterprise capabilities such as custom hosting regions, SLA guarantees, audit logging, SSO/SAML, and zero data retention are tied to enterprise arrangements or requests.
- The source does not provide detailed native integrations beyond OpenAI SDK compatibility and agent-assisted setup workflows.
FAQ
What is the difference between Gateway and Control Plane?
Opper’s Gateway is the lighter-weight option: it provides an OpenAI SDK-compatible API to access 300+ models, with provider rates passed through and a 3% fee on credit purchases. Control Plane is optional and adds observability, routing, guardrails, compliance controls, and tracing, with a 5.5% fee on credit purchases and additional per-use billing for Observe.
How do you integrate Opper into an existing app?
Yes. The docs say Opper is OpenAI SDK compatible. You can change the base URL to https://api.opper.ai/v3/compat and keep your existing OpenAI-style code, including streaming and tool/function calls.
Does Opper support model failover?
Opper supports fallback model lists on a per-request basis. If the primary model fails, the request can retry on the next model in the list, and only the successful response is billed.
What data does Opper store?
On Gateway, Opper stores only analytics and error metadata, not prompts or responses by default. On Control Plane, traces can include prompts and responses when tracing or Observe is enabled, with retention configurable per project; enterprise contracts can include zero data retention.
Is there enterprise pricing or support available?
Enterprise pricing can include volume pricing, annual commitments, and custom invoicing. The pricing page also says custom hosting regions, SLA guarantees, audit logging, SSO/SAML, and premium support are available for enterprise customers.
Quick Facts
- Category
- AI gateway / agent control plane
- Platform
- Web API, OpenAI SDK-compatible
- Hosting
- AWS Stockholm (EU)
- Models
- 300+ models across 30+ providers
- Pricing model
- Pay-as-you-go credits; 3% Gateway fee, 5.5% with Control Plane
- Primary users
- Developers, teams, and enterprises building AI apps and agents
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