costa.app

What It Is

Costa is an AI Gateway built for AI Agent operators. It is not a large language model itself; instead, it sits as a control layer between your Agents and model providers such as OpenAI, Anthropic, Vertex, Azure, and Bedrock. Its goal is to help teams understand every prompt, tool call, and decision, while managing cost, security, and routing in one place.

Core Capabilities

Its core capability is Deep Observability: rather than merely showing metadata such as latency, token usage, and cost, it emphasizes full-fidelity sessions that let you inspect the complete conversation flow. On the security side, it can block content that should not be executed, redact sensitive information, and record the execution process. Control features include failover, budgets, rate limits, and structured outputs. Cosmic Routing distributes calls across models, while Trim removes wasted tokens to improve the efficiency of existing subscriptions.

Pricing and Quotas

The Free plan costs $0 and includes 1B tokens/month analyzed, secured, and optimized, up to 5 seats, with the full set of core features included. Pro costs $49/user/month and provides 10B tokens/month plus unlimited seats. Enterprise is custom-priced, with an emphasis on customer cloud environments, stronger isolation, and dedicated engineer support. After the quota is reached, requests continue to flow, but analysis and optimization pause until the next cycle, which is relatively production-friendly.

Pros and Cons

Its strengths are a clear positioning, suitability for multi-model and Agent scenarios, a generous free quota, session-level observability that goes deeper than simple logs or cost dashboards, and the combination of security, routing, budgets, and rate limiting in a single control plane. Its limitations are that the page does not disclose Chinese-language support, payment methods, compliance certifications, or data retention policies. It also does not publish real-world benchmark results for Trim or Cosmic Routing, so a gray release or staged validation is still recommended before production rollout.

Who It’s For and Access from China

Costa is suitable for technical teams running AI Agents that need to audit call chains, control model costs, and ensure security. For Chinese users, the page does not state whether it is accessible from mainland China, supports RMB payments, or works with local alternatives, so china_access can only be assessed as unknown. If access or compliance is constrained, consider comparing it with tools such as LiteLLM, Helicone, Portkey, LangSmith, Langfuse, and OpenRouter.