OpenAI Codex vs OpenCode vs Kimi Code vs Haystack

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

Your tool
OpenAI Codex
vs
Competitor 1
OpenCode
Competitor 2
Kimi Code
Competitor 3
Haystack
Compare
4 tools · best value per row highlighted
Your tool OpenAI Codex
openai.com
A dedicated coding agent that writes and runs code for you
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Competitor OpenCode
opencode.ai
OpenCode is an open-source AI coding agent that helps developers write code in the terminal, an IDE or a desktop app.
Make main Remove
Competitor Kimi Code
kimi.com
Writing code means constantly jumping between your editor and browser tabs stuffed with documentation
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.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
204.3Mvisits/mo
—
60.1Mvisits/mo
—
MoM change
▲ 3.6%
—
▲ 52.2%
—
6-month growth
+0.3%
—
+33.8%
—
Global rank web
#212
—
#852
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Avg. last 3 months
197.3M
—
48.3M
—
Bounce rate lower is better
58%
—
37%
—
Pages / visit
3.0
—
3.9
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Visit duration
2m 31s
—
7m 13s
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Traffic sources
● Direct 81% · ● Referral 17%
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● Direct 89% · ● Referral 10%
—
OpenAI CodexOpenCodeKimi CodeHaystack
066.6M133.2M199.7M266.3MOpenAI Codex · 266.3MOpenAI Codex · 225MOpenAI Codex · 210.1MOpenAI Codex · 191.2MOpenAI Codex · 203.7MOpenAI Codex · 195.7MOpenAI Codex · 203.1MOpenAI Codex · 190.4MOpenAI Codex · 197.2MOpenAI Codex · 204.3MKimi Code · 43.3MKimi Code · 38.2MKimi Code · 33.5MKimi Code · 44.9MKimi Code · 48.1MKimi Code · 43MKimi Code · 45.3MKimi Code · 39.5MKimi Code · 60.1M10M100M1BOpenAI Codex · 266.3MOpenAI Codex · 225MOpenAI Codex · 210.1MOpenAI Codex · 191.2MOpenAI Codex · 203.7MOpenAI Codex · 195.7MOpenAI Codex · 203.1MOpenAI Codex · 190.4MOpenAI Codex · 197.2MOpenAI Codex · 204.3MKimi 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
Freemium
Free
Freemium
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Starting price
$20per month · free tier available
Free
$15per month · free tier available
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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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Adagio FreePlus $15/moPro $31/moMax $79/mo+1 more
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Capabilities input → output
Input
CodeText
CodeText
CodeText
CodeDocuments
Output
Code
Code
Code
Apps
Skill level
Advanced
Advanced
Intermediate
Advanced
Categories
Development & CodeAI Code ReviewAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
4
3
6
5
Coding
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Developer tools
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Development
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Agent creation
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Agents
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–
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LLM development
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–
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Debugging
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–
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Refactoring
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–
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Agent memory
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–
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Code documentation
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–
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Code reviews
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Developer assistance
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–
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Shell commands
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–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 1
▲ 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.