LangChain vs pgvector vs Weaviate

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

Your tool
LangChain
vs
Competitor 1
pgvector
Competitor 2
Weaviate
Competitor 3
Suggested competitors for LangChain: LlamaIndex80% CrewAI78% Langflow75% Flowise72% Haystack72% AutoGen70% Dify70% Semantic Kernel64%
Compare
3 tools · best value per row highlighted
Your tool LangChain
langchain.com
Framework for building with large language models
Remove
Competitor pgvector
github.com
pgvector is an open-source extension that adds vector similarity search to Postgres.
Make main Remove
Competitor Weaviate
weaviate.io
Search that understands meaning
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
3.4Mvisits/mo
—
154.2Kvisits/mo
MoM change
▲ 0.7%
—
▼ 11.8%
6-month growth
+21.0%
—
-7.0%
Global rank web
#13,384
—
#293,589
Avg. last 3 months
3.3M
—
155.7K
Bounce rate lower is better
42%
—
41%
Pages / visit
6.2
—
1.9
Visit duration
5m 29s
—
50s
Traffic sources
● Direct 73% · ● Referral 24%
—
● Direct 82% · ● Referral 18%
LangChainpgvectorWeaviate
0850.7K1.7M2.6M3.4MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2K100K1M10MLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Freemium
Free
Freemium
Starting price
$39per month · free tier available
Free
$45per month · free tier available
Free tier
Free trial
–
–
–
API access
–
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Plans
Developer FreePlus $39/moEnterprise Custom/mo
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Free FreeFlex $45/moPremium $0
Capabilities input → output
Input
CodeText
Data
DataImagesText
Output
Apps
Data
Data
Skill level
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Developer Tools
Development & CodeAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
3
6
Vector databases
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Developer tools
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LLM development
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Agent creation
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Agents
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Vector indexes
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Databases
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Development
–
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PostgreSQL assistance
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APIs
–
–
Agent testing
–
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Information retrieval
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 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.