OpenCode vs Aider vs Haystack vs OpenAI Codex CLI

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

Your tool
OpenCode
vs
Competitor 1
Aider
Competitor 2
Haystack
Competitor 3
OpenAI Codex CLI
Compare
4 tools · best value per row highlighted
Your tool 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.
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Competitor Aider
aider.chat
AI pair programming in your terminal
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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 CLI
developers.openai.com
OpenAI Codex CLI brings the Codex coding agent to the terminal and to scripts.
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Traffic estimated monthly website traffic
Monthly visits
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317.9Kvisits/mo
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MoM change
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▼ 15.9%
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6-month growth
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-12.7%
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Global rank web
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#140,509
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Avg. last 3 months
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378.5K
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Bounce rate lower is better
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48%
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Pages / visit
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2.0
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Visit duration
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55s
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Traffic sources
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● Direct 83% · ● Referral 16%
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OpenCodeAiderHaystackOpenAI Codex CLI
0119.7K239.3K359K478.7KAider · 293.8KAider · 277.7KAider · 314.6KAider · 289.1KAider · 364.1KAider · 402KAider · 478.7KAider · 439.5KAider · 378KAider · 317.9K100K1MAider · 293.8KAider · 277.7KAider · 314.6KAider · 289.1KAider · 364.1KAider · 402KAider · 478.7KAider · 439.5KAider · 378KAider · 317.9KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Free
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Paid
Starting price
Free
Free
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Free tier
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Free trial
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API access
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Plans
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GPT-6-Astra $10GPT-6.1-Sol $2GPT-6-Luna $0.10GPT-Live-1 $0.05/minute+1 more
Capabilities input → output
Input
CodeText
AudioCodeImagesTextWeb pages
CodeDocuments
CodeImagesText
Output
Code
Code
Apps
Code
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Coding Assistant
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
8
7
4
Coding
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Agents
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Developer tools
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Terminal
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Development
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Self hosted
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Agent creation
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LLM development
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RAG
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Code testing
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Git commands
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Agent memory
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Debugging
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Local AI
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Refactoring
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Terminal commands management
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
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▲ 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.