Langfuse vs Spanlens
Learn how Langfuse 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.
Learn how Langfuse 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.
Langfuse
Last 30 days
Last commit
6 hours agoRepository age
3 yearsVersion
v4.15.0License
MITSelf-hosted
YesRepository
langfuse/langfuse
Spanlens
Last 30 days
Last commit
18 hours agoRepository age
4 monthsLicense
MITSelf-hosted
YesRepository
spanlens/spanlens
Detailed Comparison
Langfuse appears to have several advantages over Spanlens, particularly in popularity and maturity. Consider your specific needs regarding popularity, activity, technology, maturity, licensing and features when making your decision.
Langfuse appears to have several advantages over Spanlens, particularly in popularity and maturity. Consider your specific needs regarding popularity, activity, technology, maturity, licensing and features when making your decision.
Community & Popularity
Langfuse significantly outpaces Spanlens in community adoption with 33,392 stars compared to 12 stars on GitHub. This 2782.7x difference suggests Langfuse has a much larger and more active community. In terms of developer contributions, Langfuse has 3,593 forks, indicating strong developer engagement.
Development Activity
Both projects show recent activity, with Langfuse last updated 6 hours ago and Spanlens 18 hours ago.
Technology Stack
Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Next.js. However, they differ in their additional technology choices: Spanlens leverages Python.
Project Maturity
Langfuse has been in development longer, starting 3 years ago, compared to Spanlens which began 4 months ago. This 3.0-year head start suggests Langfuse may have more mature features and established processes.
Licensing
Both projects use the MIT license, providing identical terms for usage and distribution.
Use Cases & Features
Both tools serve similar use cases in LLM Observability & Evaluation.
Hosting & Deployment
Both Langfuse and Spanlens offer self-hosting capabilities, giving you full control over your data and infrastructure.
Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.