Langfuse vs Respan vs Arize Phoenix vs Mnemom

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

Your tool
Langfuse
vs
Competitor 1
Respan
Competitor 2
Arize Phoenix
Competitor 3
Mnemom
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 Respan
respan.ai
Building AI apps
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Competitor Arize Phoenix
phoenix.arize.com
Arize Phoenix is an open-source platform for AI observability and evaluation, built by Arize.
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Competitor Mnemom
mnemom.ai
Mnemom starts free
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Traffic estimated monthly website traffic
Monthly visits
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87.3Kvisits/mo
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912visits/mo
MoM change
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▲ 28.5%
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▲ 143.2%
6-month growth
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+881.1%
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Global rank web
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#497,399
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Avg. last 3 months
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74.8K
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429
Bounce rate lower is better
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41%
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93%
Pages / visit
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2.5
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1.0
Visit duration
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19s
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Traffic sources
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● Direct 89% · ● Referral 11%
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● Direct 43% · ● Search 32%
LangfuseRespanArize PhoenixMnemom
021.8K43.6K65.4K87.3KRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3KMnemom · 375Mnemom · 9121001K10K100KRespan · 641Respan · 8.9KRespan · 37.2KRespan · 57.9KRespan · 69.1KRespan · 67.9KRespan · 87.3KMnemom · 375Mnemom · 912Feb '26MarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Free
Starting price
$29per month · free tier available
$199per month · free tier available
$50per month · free tier available
Free
Free tier
Free trial
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API access
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Plans
Hobby FreeCore $29/moPro $199/moTeams add-on $300/mo+1 more
Free FreeTeam $199/yrEnterprise Custom
AX Free FreeAX Pro $50/mo
Free Signup FreeUsage-Based CustomEnterprise Annual Custom/yr
Capabilities input → output
Input
DataText
DataText
DataText
Data
Output
Data
DataText
Data
Data
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Development & CodeProductivity & OfficeAI APIAI Developer Tools+1 more
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
12
9
8
6
AI system monitoring
Developer tools
LLM testing
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Monitoring
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AI observability
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Prompt management
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Self hosted
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Generative AI evaluation
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Agent identity verification
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AI governance
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AI safety
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APIs
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Agents
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Application monitoring
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Debugging
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LLM behavior analysis
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LLM development
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LLM management
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Problem investigation
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Prompts
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Red teaming guidance
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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
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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.