Functionize vs Kilo Code vs OpenCode vs Windsurf

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

Your tool
Functionize
vs
Competitor 1
Kilo Code
Competitor 2
OpenCode
Competitor 3
Windsurf
Compare
4 tools · best value per row highlighted
Your tool Functionize
functionize.com
Functionize is an agentic quality platform whose Studio product builds, runs and maintains tests against your live application.
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Competitor Kilo Code
kilocode.ai
Kilo Code is an open source AI agent Visual Studio (VS) Code extension that focuses on enhancing the efficiency of coding. The tool can generate code, automate tasks, and offer practical suggestions.
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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.
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Competitor Windsurf
windsurf.com
Windsurf, which now appears on the web as Devin Desktop, is a desktop code editor that doubles as a control room for coding agents.
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Traffic estimated monthly website traffic
Monthly visits
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1.9Kvisits/mo
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29.6Kvisits/mo
MoM change
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▼ 42.3%
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▲ 7.8%
6-month growth
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-94.4%
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+122.1%
Global rank web
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#4,668,091
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#1,172,623
Avg. last 3 months
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10.5K
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26.9K
Bounce rate lower is better
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34%
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50%
Pages / visit
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2.4
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1.3
Visit duration
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19s
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13s
Traffic sources
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FunctionizeKilo CodeOpenCodeWindsurf
0186.2K372.3K558.5K744.7KKilo Code · 744.7KKilo Code · 164KKilo Code · 48.6KKilo Code · 16KKilo Code · 33.5KKilo Code · 14.4KKilo Code · 10.5KKilo Code · 26.4KKilo Code · 3.2KKilo Code · 1.9KWindsurf · 16KWindsurf · 24.3KWindsurf · 15.7KWindsurf · 13.3KWindsurf · 25.4KWindsurf · 29.3KWindsurf · 23.6KWindsurf · 27.5KWindsurf · 29.6K1K10K100K1MKilo Code · 744.7KKilo Code · 164KKilo Code · 48.6KKilo Code · 16KKilo Code · 33.5KKilo Code · 14.4KKilo Code · 10.5KKilo Code · 26.4KKilo Code · 3.2KKilo Code · 1.9KWindsurf · 16KWindsurf · 24.3KWindsurf · 15.7KWindsurf · 13.3KWindsurf · 25.4KWindsurf · 29.3KWindsurf · 23.6KWindsurf · 27.5KWindsurf · 29.6KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Free
Freemium
Starting price
$20per month · free tier available
$20per month · free tier available
Free
$20per month · free tier available
Free tier
Free trial
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API access
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Plans
Free FreeGrowth $20/moScale $100/moEnterprise Custom
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Free FreePro $20/moMax $200/moTeams $80/mo
Capabilities input → output
Input
TextWeb pages
CodeText
CodeText
CodeText
Output
Data
Code
Code
Code
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeAI Testing
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Coding Assistant
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
7
5
6
8
Coding
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Agents
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Developer tools
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Development
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Agent management
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Code autocompletion
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Test automation
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Testing
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Coding in VS Code
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Debugging
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Test creation
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Test generation
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Code analysis
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Code reviews
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GitHub pull requests
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Local AI
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Self hosted
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Test cases
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Vs code
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Website testing
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 1
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
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0
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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.