OpenAI Codex CLI vs Stack AI vs Haystack vs Kimi Code

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

Your tool
OpenAI Codex CLI
vs
Competitor 1
Stack AI
Competitor 2
Haystack
Competitor 3
Kimi Code
Compare
4 tools · best value per row highlighted
Your tool OpenAI Codex CLI
developers.openai.com
OpenAI Codex CLI brings the Codex coding agent to the terminal and to scripts.
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Competitor Stack AI
stack-ai.com
Connect AI models visually
Make main Remove
Competitor 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 Kimi Code
kimi.com
Writing code means constantly jumping between your editor and browser tabs stuffed with documentation
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
6.3Kvisits/mo
—
60.1Mvisits/mo
MoM change
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▼ 57.9%
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▲ 52.2%
6-month growth
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-93.7%
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+33.8%
Global rank web
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#1,700,092
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#852
Avg. last 3 months
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13.9K
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48.3M
Bounce rate lower is better
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39%
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37%
Pages / visit
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1.8
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3.9
Visit duration
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14s
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7m 13s
Traffic sources
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—
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● Direct 89% · ● Referral 10%
OpenAI Codex CLIStack AIHaystackKimi Code
015M30.1M45.1M60.1MStack 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 · 6.3KKimi Code · 43.3MKimi Code · 38.2MKimi Code · 33.5MKimi Code · 44.9MKimi Code · 48.1MKimi Code · 43MKimi Code · 45.3MKimi Code · 39.5MKimi Code · 60.1M1K10K100K1M10M100MStack 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 · 6.3KKimi Code · 43.3MKimi Code · 38.2MKimi Code · 33.5MKimi Code · 44.9MKimi Code · 48.1MKimi Code · 43MKimi Code · 45.3MKimi Code · 39.5MKimi Code · 60.1MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Paid
Freemium
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Freemium
Starting price
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Free tier
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$15per month · free tier available
Free tier
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Free trial
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API access
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Plans
GPT-6-Astra $10GPT-6.1-Sol $2GPT-6-Luna $0.10GPT-Live-1 $0.05/minute+1 more
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Adagio FreePlus $15/moPro $31/moMax $79/mo+1 more
Capabilities input → output
Input
CodeImagesText
DataDocumentsText
CodeDocuments
CodeText
Output
Code
Apps
Apps
Code
Skill level
Advanced
Intermediate
Advanced
Intermediate
Categories
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Workflow+1 more
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Coding Assistant
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
2
5
5
6
Developer tools
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Agents
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Coding
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Agent creation
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LLM development
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No-code
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Workflows
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Debugging
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Refactoring
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Agent memory
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Developer assistance
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Finance workflow automation
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Shell commands
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
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▲ 1
Saves
0
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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.