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Description

Spanlens is an open-source observability platform licensed under MIT that enables developers to effectively track each interaction their applications have with services like OpenAI, Anthropic, Gemini, Mistral, OpenRouter, Azure OpenAI, or a local Ollama model. The integration process is incredibly simple, requiring just a single line of code to change the client's baseURL to the Spanlens proxy, or by executing "npx @spanlens/cli init," which prompts a wizard to automatically adjust your code. Once integrated, all requests are meticulously logged, capturing details such as the model used, token counts, latency, cost, and the complete prompt and response body, while also seamlessly reconstructing streaming responses. The accompanying dashboard transforms this raw log data into actionable operational insights. Cost tracking functionality allows users to break down expenditures by individual requests, models, and end users, while also distinguishing prompt-cache tokens to provide clarity on actual savings rather than simply the total costs. Additionally, agent tracing presents multi-step workflows visually, using Gantt waterfalls and node-and-edge graphs to emphasize the critical path, enabling developers to pinpoint the slowest dependencies in a fan-out scenario. This comprehensive approach not only enhances visibility but also empowers users to optimize their model interactions for better efficiency and cost management.

Description

Flo2 serves as a gateway and router that connects users to leading AI model providers such as OpenAI, Anthropic, Groq, Cerebras, and DeepInfra via a single, unified API that is compatible with OpenAI. It intelligently selects the most cost-effective or quickest model for each request through smart routing capabilities. To ensure reliability, automatic fallback mechanisms maintain application functionality even if one provider experiences downtime. Additionally, racing mode allows for simultaneous processing of requests across multiple providers, enhancing efficiency. Comprehensive cost tracking is available, detailing expenses for each request, model, and project. Developers are able to utilize their own provider keys on flo2.com, and RapidAPI's testing tier offers free tokens for preliminary evaluations. This seamless integration is aimed at simplifying the development process while maximizing performance and minimizing costs.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

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Screenshots View All

No images available

Integrations

Anthropic No 
Cerebras No 
Groq No 
OpenAI No 

Integrations

Anthropic Yes 
Cerebras Yes 
Groq Yes 
OpenAI Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Pricing Details

0
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs No 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Spanlens

Founded

2026

Country

South Korea

Website

spanlens.io

Vendor Details

Company Name

Data Products LLP

Founded

2026

Country

United Kingdom

Website

flo2.com

Product Features

Product Features

Alternatives

Alternatives