Fern vs GitBook vs Document360 vs Supadev

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

Your tool
Fern
vs
Competitor 1
GitBook
Competitor 2
Document360
Competitor 3
Supadev
Compare
4 tools · best value per row highlighted
Your tool Fern
buildwithfern.com
Fern is a developer platform that produces documentation websites, client libraries and a command-line interface for an API from one definition.
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Competitor GitBook
gitbook.com
GitBook is a documentation and knowledge platform for publishing product docs that work for both people and AI.
Make main Remove
Competitor Document360
document360.com
Document360 is knowledge base software for publishing product documentation, help centers, SOPs, user manuals and API docs.
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Competitor Supadev
supadev.so
Ever notice how AI coding assistants sometimes generate code that's completely wrong for your project
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
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3.9Kvisits/mo
MoM change
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▲ 177.8%
6-month growth
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Global rank web
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#4,727,095
Avg. last 3 months
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2.2K
Bounce rate lower is better
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56%
Pages / visit
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1.3
Visit duration
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5s
Traffic sources
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FernGitBookDocument360Supadev
09832K2.9K3.9KSupadev · 941Supadev · 351Supadev · 1.2KSupadev · 1.4KSupadev · 3.9K1001K10KSupadev · 941Supadev · 351Supadev · 1.2KSupadev · 1.4KSupadev · 3.9KDec '25Jan '26FebMarApr
Pricing
Model
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Freemium
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Paid
Starting price
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$65per month · free tier available
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$12per month
Free tier
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Free trial
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API access
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Plans
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Free FreeEssential $65/moUltimate $249/moEnterprise Custom
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Professional Monthly $30/moProfessional Yearly $12/mo
Capabilities input → output
Input
Code
CodeText
DocumentsTextVideo
Text
Output
AppsCode
DocumentsText
AppsText
Documents
Skill level
Advanced
Beginner-friendly
Intermediate
Advanced
Categories
Development & CodeAI Developer Tools
Development & CodeEducation & LearningAI Developer ToolsAI Knowledge Management
Business & MarketingEducation & LearningProductivity & OfficeAI Customer Service+2 more
Development & CodeProductivity & OfficeAI Developer ToolsAI Documents Generator
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
6
8
10
5
API docs
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Code documentation
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Developer tools
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Knowledge bases
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Customer support chatbot
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MCP
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Knowledge
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Project specifications
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Technical documentation
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Writing documentation
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AI search
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APIs
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Changelogs
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Customer support
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Digital information management
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Document creation
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Documents
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Knowledge exploration
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SOPs
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SaaS knowledge base
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 0
▲ 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.