Respan vs CometAPI vs Defapi vs Langfuse

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

Your tool
Respan
vs
Competitor 1
CometAPI
Competitor 2
DDefapi
Competitor 3
Langfuse
Compare
4 tools · best value per row highlighted
Your tool Respan
respan.ai
Building AI apps
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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 DDefapi
defapi.org
You know how managing multiple AI provider integrations usually means maintaining separate codebases for each vendor
Make main Remove
Competitor Langfuse
langfuse.com
Langfuse is an open-source platform for observability and evaluation of AI agents and LLM applications.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
87.3Kvisits/mo
302.3Kvisits/mo
2.4Kvisits/mo
—
MoM change
▲ 28.5%
▲ 9.9%
▼ 42.6%
—
6-month growth
+881.1%
-16.5%
-86.2%
—
Global rank web
#497,399
#157,147
#4,650,820
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Avg. last 3 months
74.8K
295.7K
4.8K
—
Bounce rate lower is better
41%
46%
36%
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Pages / visit
2.5
2.9
1.4
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Visit duration
19s
38s
7s
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Traffic sources
● Direct 89% · ● Referral 11%
● Direct 69% · ● Referral 30%
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—
RespanCometAPIDefapiLangfuse
0208.6K417.2K625.8K834.4KRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3KCometAPI · 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 · 2.4K1001K10K100K1MRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3KCometAPI · 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
Freemium
Starting price
$199per month · free tier available
$4per month · free tier available
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$29per month · free tier available
Free tier
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Free trial
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–
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API access
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Plans
Free FreeTeam $199/yrEnterprise Custom
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
Hobby FreeCore $29/moPro $199/moTeams add-on $300/mo+1 more
Capabilities input → output
Input
TextData
TextImages
TextImagesAudio
DataText
Output
TextData
VideoTextImages
TextImagesAudio
Data
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI APIAI Developer Tools+1 more
Development & CodeAI API
Development & CodeAI API
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
6
4
12
APIs
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Developer tools
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AI system monitoring
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API integrations
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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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–
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LLM gateway
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API management
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Self hosted
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API security
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–
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Application monitoring
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Debugging
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–
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Generative AI evaluation
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Image generation
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LLM behavior analysis
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–
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LLM development
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–
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LLM management
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–
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Prompts
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–
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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
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
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.