Langfuse vs Defapi vs CometAPI vs Datadog

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

Your tool
Langfuse
vs
Competitor 1
DDefapi
Competitor 2
CometAPI
Competitor 3
Datadog
Compare
4 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 DDefapi
defapi.org
You know how managing multiple AI provider integrations usually means maintaining separate codebases for each vendor
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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
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Competitor Datadog
datadoghq.com
Datadog is a cloud-scale observability and security service that brings infrastructure metrics, application traces, logs, security signals and user experience data into one place.
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Traffic estimated monthly website traffic
Monthly visits
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2.4Kvisits/mo
302.3Kvisits/mo
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MoM change
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▼ 42.6%
▲ 9.9%
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6-month growth
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-86.2%
-16.5%
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Global rank web
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#4,650,820
#157,147
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Avg. last 3 months
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4.8K
295.7K
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Bounce rate lower is better
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36%
46%
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Pages / visit
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1.4
2.9
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Visit duration
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7s
38s
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Traffic sources
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● Direct 69% · ● Referral 30%
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LangfuseDefapiCometAPIDatadog
0208.6K417.2K625.8K834.4KDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3K1K10K100K1MDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KDec '25Jan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Paid
Freemium
Freemium
Starting price
$29per month · free tier available
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$4per month · free tier available
$15per month · free tier available
Free tier
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Free trial
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API access
Plans
Hobby FreeCore $29/moPro $199/moTeams add-on $300/mo+1 more
Gemini 3.1 Pro Preview $1/$6/per requestClaude Sonnet 4.6 $1.5/$7.5/per requestClaude Opus 4.6 $2.5/$12.5/per requestSora 2 Stable $0.175+/per request+2 more
Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
Infrastructure Free FreeInfrastructure Pro $15/moInfrastructure Enterprise $23/moDevSecOps Pro $22/mo+3 more
Capabilities input → output
Input
DataText
ImagesTextAudio
TextImages
DataCode
Output
Data
TextImagesAudio
VideoTextImages
Data
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Development & CodeAI API
Development & CodeAI API
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
12
4
6
13
Developer tools
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APIs
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API integrations
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Monitoring
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AI observability
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AI system monitoring
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Application monitoring
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Cloud monitoring
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Infrastructure monitoring
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LLM gateway
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API management
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Cloud security
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Database monitoring
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LLM testing
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Prompt management
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Security monitoring
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Self hosted
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Vulnerability analysis
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API security
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Agents
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Cybersecurity 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 management
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Network monitoring
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Prompts
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Root cause analysis
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Video generation
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
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Saves
0
0
0
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Reviews
0
0
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Prompts
0
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0
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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.