GitHub Copilot vs Diffblue Cover vs devlo vs Functionize

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

Your tool
GitHub Copilot
vs
Competitor 1
Diffblue Cover
Competitor 2
devlo
Competitor 3
Functionize
Compare
4 tools · best value per row highlighted
Your tool GitHub Copilot
github.com
Your AI pair programmer that actually knows the codebase
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Competitor Diffblue Cover
diffblue.com
Diffblue Cover, now offered as the Diffblue Testing Agent, generates, verifies and fixes unit tests autonomously across enterprise codebases.
Make main Remove
Competitor devlo
devlo.ai
Engineering teams get a browser-based system that handles code from multiple angles
Make main Remove
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
637.9Mvisits/mo
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MoM change
▲ 3.7%
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▼ 70.3%
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6-month growth
+19.3%
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Global rank web
#49
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#8,880,689
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Avg. last 3 months
629.7M
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537
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Bounce rate lower is better
36%
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0%
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Pages / visit
5.9
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Visit duration
6m 26s
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Traffic sources
● Direct 83% · ● Referral 15%
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GitHub CopilotDiffblue CoverdevloFunctionize
0159.5M318.9M478.4M637.9MGitHub Copilot · 484.3MGitHub Copilot · 504MGitHub Copilot · 542.6MGitHub Copilot · 534.8MGitHub Copilot · 634.3MGitHub Copilot · 631MGitHub Copilot · 636.1MGitHub Copilot · 615.2MGitHub Copilot · 637.9Mdevlo · 7.9Kdevlo · 5.4Kdevlo · 1.6K1K10K100K1M10M100M1BGitHub Copilot · 484.3MGitHub Copilot · 504MGitHub Copilot · 542.6MGitHub Copilot · 534.8MGitHub Copilot · 634.3MGitHub Copilot · 631MGitHub Copilot · 636.1MGitHub Copilot · 615.2MGitHub Copilot · 637.9Mdevlo · 7.9Kdevlo · 5.4Kdevlo · 1.6KNov '25DecJan '26FebMarAprMayJunJul
Pricing
Model
Freemium
Paid
Freemium
Freemium
Starting price
$4per month · free tier available
$1,500per month
$19per 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
Free FreeTeam $4/moEnterprise $21/mo
Starter package $1,500Enterprise Custom
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Free FreeGrowth $20/moScale $100/moEnterprise Custom
Capabilities input → output
Input
CodeText
Code
CodeText
TextWeb pages
Output
Code
Code
AppsCode
Data
Skill level
Intermediate
Advanced
Advanced
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Code Review+1 more
Development & CodeAI Testing
Development & CodeProductivity & OfficeAI AgentAI App Builder+2 more
Development & CodeAI Testing
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
4
7
11
5
Coding
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Agents
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Code reviews
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Test automation
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Test creation
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Test generation
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Testing
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Test cases
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GitHub pull requests
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Teams performance analytics
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Unit tests
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Agent creation
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Code testing
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Development
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GitHub
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Jira tickets
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Agent management
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Code quality
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Frontend development
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
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▲ 1
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Saves
0
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Reviews
0
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Prompts
2
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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.