OpenAI Codex vs Kimi Code vs OpenCode vs ReadMe

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

Your tool
OpenAI Codex
vs
Competitor 1
Kimi Code
Competitor 2
OpenCode
Competitor 3
ReadMe
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
Remove
Competitor Kimi Code
kimi.com
Writing code means constantly jumping between your editor and browser tabs stuffed with documentation
Make main Remove
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 ReadMe
readme.com
ReadMe builds interactive API documentation that developers can read, test and search.
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
—
—
Avg. last 3 months
197.3M
48.3M
—
—
Bounce rate lower is better
58%
37%
—
—
Pages / visit
3.0
3.9
—
—
Visit duration
2m 31s
7m 13s
—
—
Traffic sources
● Direct 81% · ● Referral 17%
● Direct 89% · ● Referral 10%
—
—
OpenAI CodexKimi CodeOpenCodeReadMe
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
Freemium
Free
Freemium
Starting price
$20per month · free tier available
$15per month · free tier available
Free
$250per month · free tier available
Free tier
Free trial
–
–
–
API access
–
–
–
Plans
—
Adagio FreePlus $15/moPro $31/moMax $79/mo+1 more
—
Starter FreePro $250/moEnterprise Custom
Capabilities input → output
Input
CodeText
CodeText
CodeText
DocumentsTextWeb pages
Output
Code
Code
Code
DocumentsText
Skill level
Advanced
Intermediate
Advanced
Intermediate
Categories
Development & CodeAI Code ReviewAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeEducation & LearningAI Developer ToolsAI Knowledge Management
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
6
6
6
Coding
–
Developer tools
–
Agents
–
–
Code documentation
–
–
Debugging
–
–
Development
–
–
API docs
–
–
–
GitHub automation
–
–
–
GitHub pull requests
–
–
–
Refactoring
–
–
–
AI search
–
–
–
Code reviews
–
–
–
Developer assistance
–
–
–
Knowledge bases
–
–
–
Local AI
–
–
–
MCP
–
–
–
Self hosted
–
–
–
Shell commands
–
–
–
Terminal
–
–
–
Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 1
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
0
0
0
Verified listing
–
–
–
–

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.