pgvector vs Weaviate vs Stack AI vs Alma by Olivares AI

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
Stack AI
Competitor 3
Alma by Olivares AI
Compare
4 tools · best value per row highlighted
Your tool pgvector
github.com
pgvector is an open-source extension that adds vector similarity search to Postgres.
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Competitor Weaviate
weaviate.io
Search that understands meaning
Make main Remove
Competitor Stack AI
stack-ai.com
Connect AI models visually
Make main Remove
Competitor Alma by Olivares AI
olivares.ai
Memory · Agents · Studios An AI that remembers and works for you.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
154.2Kvisits/mo
6.3Kvisits/mo
—
MoM change
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▼ 11.8%
▼ 57.9%
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6-month growth
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-7.0%
-93.7%
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Global rank web
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#293,589
#1,700,092
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Avg. last 3 months
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155.7K
13.9K
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Bounce rate lower is better
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41%
39%
0%
Pages / visit
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1.9
1.8
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Visit duration
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50s
14s
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Traffic sources
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● Direct 82% · ● Referral 18%
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pgvectorWeaviateStack AIAlma by Olivares AI
056.5K113K169.5K226KWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3K1K10K100K1MWeaviate · 226KWeaviate · 193.3KWeaviate · 188.9KWeaviate · 165.9KWeaviate · 184.5KWeaviate · 169.2KWeaviate · 137.9KWeaviate · 174.8KWeaviate · 154.2KStack AI · 143.4KStack AI · 153.7KStack AI · 167.9KStack AI · 160KStack AI · 99.4KStack AI · 35.9KStack AI · 17.4KStack AI · 20.6KStack AI · 14.9KStack AI · 6.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Freemium
Freemium
Freemium
Starting price
Free
$45per month · free tier available
Free tier
$129per month · free tier available
Free tier
Free trial
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API access
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Plans
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Free FreeFlex $45/moPremium $0
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Community CustomBusiness $129/moBusiness + Regulated Operations $228/moBusiness Max $585/mo+1 more
Capabilities input → output
Input
Data
DataImagesText
DataDocumentsText
Text
Output
Data
Data
Apps
AudioImagesTextVideo
Skill level
Advanced
Advanced
Intermediate
Intermediate
Categories
Development & CodeAI Developer Tools
Development & CodeAI Developer Tools
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI Developer ToolsAI Monitor
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
6
7
8
Agents
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Vector databases
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Developer tools
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Agent memory
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Chatbots
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No-code
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Vector indexes
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Workflows
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Agent creation
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Business automation
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Databases
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Image generation
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Music creation
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PostgreSQL assistance
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Process automation
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Video generation
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APIs
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Finance workflow automation
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Information retrieval
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LLM development
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RAG
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Report generation
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Research
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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
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 3
Saves
0
0
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0
Reviews
0
0
0
0
Prompts
0
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.