Langfuse vs CometAPI vs Defapi

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
DDefapi
Competitor 3
Suggested competitors for Langfuse: Arize Phoenix92% Helicone88% Respan87% Portkey84% Weights & Biases84% Datadog81% LiteLLM79% Alma by Olivares AI79%
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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
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Competitor DDefapi
defapi.org
You know how managing multiple AI provider integrations usually means maintaining separate codebases for each vendor
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
302.3Kvisits/mo
2.4Kvisits/mo
MoM change
—
▲ 9.9%
▼ 42.6%
6-month growth
—
-16.5%
-86.2%
Global rank web
—
#157,147
#4,650,820
Avg. last 3 months
—
295.7K
4.8K
Bounce rate lower is better
—
46%
36%
Pages / visit
—
2.9
1.4
Visit duration
—
38s
7s
Traffic sources
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● Direct 69% · ● Referral 30%
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LangfuseCometAPIDefapi
0208.6K417.2K625.8K834.4KCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4K1K10K100K1MCometAPI · 834.4KCometAPI · 619.7KCometAPI · 437.2KCometAPI · 362.2KCometAPI · 355.5KCometAPI · 362.7KCometAPI · 309.5KCometAPI · 275.2KCometAPI · 302.3KDefapi · 11.1KDefapi · 13KDefapi · 12.4KDefapi · 17.7KDefapi · 9.4KDefapi · 6.2KDefapi · 7.6KDefapi · 4.2KDefapi · 2.4KDec '25Jan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Paid
Starting price
$29per month · free tier available
$4per month · free tier available
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Free tier
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Free trial
–
–
API access
Plans
Hobby FreeCore $29/moPro $199/moTeams add-on $300/mo+1 more
Free Trial FreePay-as-you-go Custom/usage-basedEnterprise Custom/mo
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
Capabilities input → output
Input
DataText
ImagesText
AudioImagesText
Output
Data
ImagesTextVideo
AudioImagesText
Skill level
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Development & CodeAI API
Development & CodeAI API
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
6
4
APIs
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API integrations
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Developer tools
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AI system monitoring
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–
LLM gateway
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–
API management
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–
LLM testing
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Monitoring
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–
Self hosted
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–
API security
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–
Debugging
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–
Image generation
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–
LLM management
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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.