OpenAI Codex vs Knowledge Plane vs Gemini CLI

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

Your tool
OpenAI Codex
vs
Competitor 1
Knowledge Plane
Competitor 2
Gemini CLI
Competitor 3
Suggested competitors for OpenAI Codex: Claude Code92% Cursor86% GitHub Copilot86% Jules85% CodeRabbit84% Qodo (Formerly Codium)82% Kilo Code80% Google Antigravity80%
Compare
3 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 Knowledge Plane
knowledgeplane.io
Engineering teams watch their AI tools hallucinate outdated project details
Make main Remove
Competitor Gemini CLI
github.com
It can query and edit large codebases, generate new apps from PDFs, images, or sketches using multimodal input, and debug problems when you describe them in plain language.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
204.3Mvisits/mo
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MoM change
▲ 3.6%
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6-month growth
+0.3%
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Global rank web
#212
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Avg. last 3 months
197.3M
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Bounce rate lower is better
58%
0%
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Pages / visit
3.0
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Visit duration
2m 31s
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Traffic sources
● Direct 81% · ● Referral 17%
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OpenAI CodexKnowledge PlaneGemini CLI
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 · 204.3M100M1BOpenAI 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 · 204.3MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Free
Starting price
$20per month · free tier available
$19per month · free tier available
Free
Free tier
Free trial
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API access
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Plans
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Free (personal Google account) Free
Capabilities input → output
Input
CodeText
CodeDocumentsText
CodeDocumentsImagesText
Output
Code
Text
Code
Skill level
Advanced
Intermediate
Advanced
Categories
Development & CodeAI Code ReviewAI Coding Assistant
Education & LearningAI Knowledge Management
Development & CodeAI Coding Assistant
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
12
6
Coding
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Agents
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Developer tools
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Code documentation
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Debugging
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Development
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Knowledge bases
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Knowledge graphs
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Agent memory
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GitHub automation
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GitHub pull requests
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Knowledge
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Knowledge maps
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Knowledge sourcing
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Code analysis
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Code reviews
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Codebase q a
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Digital information management
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Knowledge exchange
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Slack
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Terminal
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 1
▲ 0
▲ 0
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.