Opper
EU-hosted AI gateway serving 300+ models through one OpenAI-compatible API
Opper is an EU-hosted AI gateway from Stockholm that routes to 300+ models across 30+ providers (Anthropic, OpenAI, Google, DeepSeek, Qwen) through a single OpenAI-compatible API. Requests are processed in AWS Stockholm and data stays in the EU by default, which makes it a practical route to frontier models under GDPR constraints.
Pricing is pay-as-you-go with token rates passed through at provider prices; Opper takes a 3% fee on credit purchases (5.5% with the Control Plane tier, which adds observability, intelligent routing, PII masking, and budget controls). Python and TypeScript SDKs, structured outputs, and an agent CLI round out the platform.
Pricing: Pay-as-you-go
Opper Alternatives
Explore 79 products in the Inference APIs category. View all Opper alternatives.
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OpenAI-compatible API for open-weight LLMs and image models, hosted in IONOS EU data centers
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Flat-rate unlimited inference on open-weight models, sold in daily 8-hour windows
Lyceum
EU-hosted inference cloud for open-source models, OpenAI-compatible
vLLM
High-throughput LLM inference engine with PagedAttention for efficient GPU memory usage
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