pgvector vs Weaviate vs LangChain

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

Your tool
pgvector
vs
Competitor 1
Weaviate
Competitor 2
LangChain
Competitor 3
Suggested competitors for pgvector: Chroma88% InfinityFlow88% Zilliz Cloud87% Qdrant84% Pinecone80% Haystack80% DeepWiki76% Bito AI75%
Compare
3 tools · best value per row highlighted
Your tool pgvector
github.com
pgvector is an open-source extension that adds vector similarity search to Postgres.
Remove
Competitor Weaviate
weaviate.io
Search that understands meaning
Make main Remove
Competitor LangChain
langchain.com
Framework for building with large language models
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
154.2Kvisits/mo
3.4Mvisits/mo
MoM change
—
▼ 11.8%
▲ 0.7%
6-month growth
—
-7.0%
+21.0%
Global rank web
—
#293,589
#13,384
Avg. last 3 months
—
155.7K
3.3M
Bounce rate lower is better
—
41%
42%
Pages / visit
—
1.9
6.2
Visit duration
—
50s
5m 29s
Traffic sources
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● Direct 82% · ● Referral 18%
● Direct 73% · ● Referral 24%
pgvectorWeaviateLangChain
0850.7K1.7M2.6M3.4MWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4M100K1M10MWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KLangChain · 3MLangChain · 2.9MLangChain · 3.2MLangChain · 2.8MLangChain · 3.4MLangChain · 3.2MLangChain · 3.1MLangChain · 3.4MLangChain · 3.4MNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Free
Freemium
Freemium
Starting price
Free
$45per month · free tier available
$39per month · free tier available
Free tier
Free trial
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–
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API access
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Plans
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Free FreeFlex $45/moPremium $0
Developer FreePlus $39/moEnterprise Custom/mo
Capabilities input → output
Input
Data
DataImagesText
CodeText
Output
Data
Data
Apps
Skill level
Advanced
Advanced
Advanced
Categories
Development & CodeAI Developer Tools
Development & CodeAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
7
6
6
Developer tools
Vector databases
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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
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–
Agent testing
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Information retrieval
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RAG
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SQL
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Self hosted
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 1
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.