Langfuse vs CometAPI vs Respan

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
Langfuse
vs
Competitor 1
CometAPI
Competitor 2
Respan
Competitor 3
Suggested competitors for Langfuse: Arize Phoenix93% Helicone89% Weights & Biases86% Portkey86% Datadog81% New Relic AI78% LiteLLM77% Dynatrace77%
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3 tools · best value per row highlighted
Your tool Langfuse
langfuse.com
Langfuse is an open-source platform for observability and evaluation of AI agents and LLM applications.
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Competitor CometAPI
cometapi.com
CometAPI functions as an aggregation layer that sits between your application and hundreds of AI model providers
Make main Remove
Competitor Respan
respan.ai
Building AI apps
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
302.3Kvisits/mo
87.3Kvisits/mo
MoM change
—
▲ 9.9%
▲ 28.5%
6-month growth
—
-16.5%
+881.1%
Global rank web
—
#157,147
#497,399
Avg. last 3 months
—
295.7K
74.8K
Bounce rate lower is better
—
46%
41%
Pages / visit
—
2.9
2.5
Visit duration
—
38s
19s
Traffic sources
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● Direct 69% · ● Referral 30%
● Direct 89% · ● Referral 11%
LangfuseCometAPIRespan
0208.6K417.2K625.8K834.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3K1001K10K100K1MCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3KDec '25Jan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Starting price
$29per month · free tier available
$4per month · free tier available
$199per month · free tier available
Free tier
Free trial
–
–
API access
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Plans
Hobby FreeCore $29/moPro $199/moTeams add-on $300/mo+1 more
Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
Free FreeTeam $199/yrEnterprise Custom
Capabilities input → output
Input
DataText
ImagesText
DataText
Output
Data
ImagesTextVideo
DataText
Skill level
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Development & CodeAI API
Development & CodeProductivity & OfficeAI APIAI Developer Tools+1 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
12
6
9
Developer tools
AI system monitoring
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APIs
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LLM testing
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Monitoring
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Prompt management
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AI observability
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–
LLM gateway
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–
API integrations
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Self hosted
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Application monitoring
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Debugging
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Generative AI evaluation
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Image generation
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LLM behavior analysis
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LLM development
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LLM management
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–
Prompts
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–
Red teaming guidance
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–
Video generation
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–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
Saves
0
0
0
Reviews
0
0
0
Prompts
0
0
0
Verified listing
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.