What is the main difference between OpenLIT and Spanlens?

OpenLIT and Spanlens are both llm observability & evaluation but differ in their approach, features, and target audience. Compare their GitHub stats, technology stack, and community adoption to make the best choice.

Which is better: OpenLIT or Spanlens?

The choice between OpenLIT and Spanlens depends on your specific needs, technical requirements, and team preferences. Both are quality open source solutions with active communities.

Can I migrate from OpenLIT to Spanlens?

Migration between OpenLIT and Spanlens is possible but requires careful planning. Consider data export/import capabilities, feature parity, and potential workflow changes.

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OpenLIT vs Spanlens

Learn how OpenLIT and Spanlens differ in their key features, development activity, technology stack and community adoption, so you can decide which of these llm observability & evaluation is best for you.

OpenLIT

Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.

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2,701stars+77(+2.9%)

Last 30 days

Last commit
3 days ago
Repository age
3 years
Version
1.15.0
License
Apache-2.0
Repository
openlit/openlit

Sponsor OpenLIT onopencollective.com

Spanlens

Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.

Visit Spanlens Read more

12stars

Last 30 days

Last commit
18 hours ago
Repository age
4 months
License
MIT
Self-hosted
Yes
Repository
spanlens/spanlens

Detailed Comparison

Both OpenLIT and Spanlens have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, activity, technology, maturity, licensing and features when making your decision.

OpenLIT wins

Community & Popularity

**OpenLIT ** significantly outpaces Spanlens in community adoption with 2,701 stars compared to 12 stars on GitHub. This 225.1x difference suggests OpenLIT has a much larger and more active community. In terms of developer contributions, **OpenLIT ** has 359 forks, indicating moderate developer engagement.

Comparable

Development Activity

Both projects show recent activity, with **OpenLIT ** last updated 3 days ago and Spanlens 18 hours ago.

Comparable

Technology Stack

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Python, Next.js. However, they differ in their additional technology choices: **OpenLIT ** uses Golang, C, Objective-C.

OpenLIT wins

Project Maturity

**OpenLIT ** has been in development longer, starting 3 years ago, compared to Spanlens which began 4 months ago. This 2.3-year head start suggests OpenLIT may have more mature features and established processes.

Spanlens wins

Licensing

Spanlens uses the MIT license, which is more permissive than **OpenLIT **'s Apache-2.0 license, potentially offering greater flexibility for commercial use and integration.

Comparable

Use Cases & Features

Both tools serve similar use cases in LLM Observability & Evaluation.

Spanlens wins

Hosting & Deployment

Spanlens provides self-hosting options for complete data control and customization, while **OpenLIT ** may be primarily cloud-based or require different deployment approaches.