OpenAI Codex CLI vs Amp vs Functionize

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

Your tool
OpenAI Codex CLI
vs
Competitor 1
Amp
Competitor 2
Functionize
Competitor 3
Suggested competitors for OpenAI Codex CLI: Gemini CLI100% Qwen Code98% OpenCode97% JetBrains AI Assistant95% Visual Studio Code95% GitHub Copilot CLI94% Kimi Code94% Google Antigravity93%
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3 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 Amp
ampcode.com
Amp is a coding agent and development environment for engineers who want agents running independently.
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Competitor Functionize
functionize.com
Functionize is an agentic quality platform whose Studio product builds, runs and maintains tests against your live application.
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
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6-month growth
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Global rank web
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Bounce rate lower is better
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Pricing
Model
Paid
Freemium
Freemium
Starting price
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$20per month · free tier available
$20per 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
Hobby FreeIndividual (Megawatt) $20/moGigawatt CustomTeams Custom+1 more
Free FreeGrowth $20/moScale $100/moEnterprise Custom
Capabilities input → output
Input
CodeImagesText
CodeTextVideo
TextWeb pages
Output
Code
Code
Data
Skill level
Advanced
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeAI Testing
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
4
2
7
Coding
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Agents
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Developer tools
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Test automation
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Testing
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Test creation
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Test generation
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Terminal
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Test cases
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Website testing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
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Upvotes
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Saves
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Reviews
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Prompts
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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.