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What is Spanlens?

Spanlens is an open-source observability tool under the MIT license that allows developers to seamlessly monitor their applications' interactions with various services, including OpenAI, Anthropic, and others. The integration is remarkably straightforward; developers can either modify the client's baseURL to point to the Spanlens proxy with a single line of code or use the command "npx @spanlens/cli init," which activates a wizard for automatic code adjustments. After integration, the platform logs all requests in detail, tracking essential metrics such as model type, token counts, latency, costs, and the entire prompt and response body, while also effectively reconstructing streaming outputs. The platform's dashboard converts this extensive log information into valuable operational insights. With cost tracking capabilities, users can analyze their spending by specific requests, models, and users, along with differentiating prompt-cache tokens to clarify actual savings beyond total costs. Furthermore, agent tracing illustrates multi-step workflows through Gantt waterfalls and node-and-edge graphs, highlighting critical paths to help developers identify the slowest dependencies in complex scenarios. This thorough approach not only improves visibility but also equips users with the tools necessary to refine their model interactions for enhanced efficiency and effective cost management, fostering a more productive development environment overall.

What is Skylight?

Skylight functions as a sophisticated profiler tailored for Ruby and Rails applications, converting performance data into actionable insights that allow developers to spend less time troubleshooting and more time enhancing their applications. It classifies endpoints by a metric called "agony," which uniquely combines factors of slowness and usage frequency, helping you pinpoint the areas that will yield the highest returns on your optimization efforts. Through an examination of endpoint graphs, you can precisely identify where slowdowns occur, with the most pronounced bars in these graphs signifying the events that demand your immediate focus. Once you've implemented improvements in your code, redeploying your application is straightforward, with deployment events clearly marked on the overview graph for an easy visual comparison of your adjustments. You have the option to delve into a histogram of response times to uncover rare slowdowns that could skew your overall averages. Furthermore, the tool enables you to compile event sequences based on either time or memory usage, assisting in the detection of potential bottlenecks. This capability allows you to effectively identify your slowest responses, sharpening your attention on the differences between your quickest and slowest responses, which ultimately contributes to a more efficient application. By consistently tracking and optimizing your application, you can guarantee a more seamless user experience and improved performance in the long run, as well as continually adapt to changing user needs and application demands.

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Media

Integrations Supported

Ruby
Ruby on Rails

Integrations Supported

Ruby
Ruby on Rails

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Pricing Information

$20 per month
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Spanlens

Date Founded

2026

Company Location

South Korea

Company Website

spanlens.io

Company Facts

Organization Name

Skylight

Company Website

www.skylight.io

Categories and Features

Categories and Features

Application Performance Monitoring (APM)

Baseline Manager
Diagnostic Tools
Full Transaction Diagnostics
Performance Control
Resource Management
Root-Cause Diagnosis
Server Performance
Trace Individual Transactions

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