Gemini CLI vs Haystack vs OpenAI Codex vs Theia IDE

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

Your tool
Gemini CLI
vs
Competitor 1
Haystack
Competitor 2
OpenAI Codex
Competitor 3
TITheia IDE
Compare
4 tools · best value per row highlighted
Your tool 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.
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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 OpenAI Codex
openai.com
A dedicated coding agent that writes and runs code for you
Make main Remove
Competitor TITheia IDE
theia-ide.org
An open-source IDE that puts AI at the center while giving you complete control over how it works
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
—
—
204.3Mvisits/mo
35.3Kvisits/mo
MoM change
—
—
▲ 3.6%
▼ 8.1%
6-month growth
—
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+0.3%
-40.2%
Global rank web
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#212
#929,571
Avg. last 3 months
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—
197.3M
41.1K
Bounce rate lower is better
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—
58%
41%
Pages / visit
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3.0
1.7
Visit duration
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2m 31s
27s
Traffic sources
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● Direct 81% · ● Referral 17%
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Gemini CLIHaystackOpenAI CodexTheia IDE
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 · 204.3MTheia IDE · 54.7KTheia IDE · 58.4KTheia IDE · 59.1KTheia IDE · 49.4KTheia IDE · 47.5KTheia IDE · 49.5KTheia IDE · 38.4KTheia IDE · 35.3K10K100K1M10M100M1BOpenAI 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 · 204.3MTheia IDE · 54.7KTheia IDE · 58.4KTheia IDE · 59.1KTheia IDE · 49.4KTheia IDE · 47.5KTheia IDE · 49.5KTheia IDE · 38.4KTheia IDE · 35.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
—
Freemium
Free
Starting price
Free
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$20per month · free tier available
Free
Free tier
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Free trial
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API access
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Plans
Free (personal Google account) Free
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Capabilities input → output
Input
CodeDocumentsImagesText
CodeDocuments
CodeText
CodeText
Output
Code
Apps
Code
Code
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Code ReviewAI Coding Assistant
Development & CodeAI Coding AssistantAI Developer Tools
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
7
9
5
Coding
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Agents
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Developer tools
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Development
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Agent creation
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Debugging
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LLM development
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RAG
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GitHub automation
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GitHub pull requests
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Agent memory
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Code analysis
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Code documentation
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Code reviews
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Self hosted
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Terminal
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Vs code
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 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.