Haystack vs LangChain vs pgvector vs Langflow

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

Your tool
Haystack
vs
Competitor 1
LangChain
Competitor 2
pgvector
Competitor 3
Langflow
Compare
4 tools · best value per row highlighted
Your tool Haystack
haystack.deepset.ai
Haystack is an open-source AI orchestration framework from deepset for building production-grade LLM applications and agents.
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Competitor LangChain
langchain.com
Framework for building with large language models
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Competitor pgvector
github.com
pgvector is an open-source extension that adds vector similarity search to Postgres.
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Competitor Langflow
langflow.org
Drag and drop AI
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Traffic estimated monthly website traffic
Monthly visits
—
3.4Mvisits/mo
—
215.3Kvisits/mo
MoM change
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▲ 0.7%
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▼ 0.7%
6-month growth
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+21.0%
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-4.9%
Global rank web
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#13,384
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#217,191
Avg. last 3 months
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3.3M
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225.2K
Bounce rate lower is better
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42%
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44%
Pages / visit
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6.2
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2.2
Visit duration
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5m 29s
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1m 04s
Traffic sources
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● Direct 73% · ● Referral 24%
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● Direct 76% · ● Referral 24%
HaystackLangChainpgvectorLangflow
0850.7K1.7M2.6M3.4MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3K100K1M10MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MLangflow · 295.3KLangflow · 247KLangflow · 269.8KLangflow · 226.5KLangflow · 239.5KLangflow · 229.4KLangflow · 243.6KLangflow · 216.8KLangflow · 215.3KNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
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Freemium
Free
Free
Starting price
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$39per month · free tier available
Free
Free
Free tier
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Free trial
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–
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API access
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Plans
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Developer FreePlus $39/moEnterprise Custom/mo
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Capabilities input → output
Input
CodeDocuments
CodeText
Data
Text
Output
Apps
Apps
Data
Apps
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Developer Tools
Chatbots & CompanionsDevelopment & CodeProductivity & OfficeAI Agent+3 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
5
6
3
9
Agents
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Agent creation
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LLM development
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Developer tools
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Development
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No-code
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Vector databases
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Vector indexes
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Chatbots
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PostgreSQL assistance
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Workflows
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APIs
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Agent memory
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Agent testing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 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.