GitHub Copilot vs Functionize vs CodeGPT vs Diffblue Cover

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

Your tool
GitHub Copilot
vs
Competitor 1
Functionize
Competitor 2
CodeGPT
Competitor 3
Diffblue Cover
Compare
4 tools · best value per row highlighted
Your tool GitHub Copilot
github.com
Your AI pair programmer that actually knows the codebase
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
Competitor CodeGPT
codegpt.co
ChatGPT in your code editor
Make main Remove
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
Traffic estimated monthly website traffic
Monthly visits
637.9Mvisits/mo
—
188.3Kvisits/mo
—
MoM change
▲ 3.7%
—
▲ 0.8%
—
6-month growth
+19.3%
—
-37.2%
—
Global rank web
#49
—
#251,957
—
Avg. last 3 months
629.7M
—
196.6K
—
Bounce rate lower is better
36%
—
43%
—
Pages / visit
5.9
—
1.9
—
Visit duration
6m 26s
—
38s
—
Traffic sources
● Direct 83% · ● Referral 15%
—
● Direct 58% · ● Referral 42%
—
GitHub CopilotFunctionizeCodeGPTDiffblue Cover
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 · 637.9MCodeGPT · 267.5KCodeGPT · 278.8KCodeGPT · 284.1KCodeGPT · 233.4KCodeGPT · 299.7KCodeGPT · 277.1KCodeGPT · 262.2KCodeGPT · 214.6KCodeGPT · 186.8KCodeGPT · 188.3K100K1M10M100M1BGitHub Copilot · 484.3MGitHub Copilot · 504MGitHub Copilot · 542.6MGitHub Copilot · 534.8MGitHub Copilot · 634.3MGitHub Copilot · 631MGitHub Copilot · 636.1MGitHub Copilot · 615.2MGitHub Copilot · 637.9MCodeGPT · 267.5KCodeGPT · 278.8KCodeGPT · 284.1KCodeGPT · 233.4KCodeGPT · 299.7KCodeGPT · 277.1KCodeGPT · 262.2KCodeGPT · 214.6KCodeGPT · 186.8KCodeGPT · 188.3KNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Freemium
Freemium
Paid
Starting price
$4per month · free tier available
$20per month · free tier available
$9per month · free tier available
$1,500per month
Free tier
–
Free trial
–
–
API access
–
–
–
–
Plans
Free FreeTeam $4/moEnterprise $21/mo
Free FreeGrowth $20/moScale $100/moEnterprise Custom
Free FreeProfessional $9/moTeams $27/moEnterprise Custom
Starter package $1,500Enterprise Custom
Capabilities input → output
Input
CodeText
TextWeb pages
CodeText
Code
Output
Code
Data
Code
Code
Skill level
Intermediate
Advanced
Intermediate
Advanced
Categories
Development & CodeProductivity & OfficeAI AgentAI Code Review+1 more
Development & CodeAI Testing
Development & CodeAI Coding Assistant
Development & CodeAI Testing
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
7
3
9
Agents
–
Coding
–
–
Test automation
–
–
Test creation
–
–
Test generation
–
–
Testing
–
–
Debugging
–
–
Test cases
–
–
Code autocompletion
–
–
–
Unit tests
–
–
–
Code reviews
–
–
–
Code testing
–
–
–
Coding in VS Code
–
–
–
Vs code
–
–
–
Agent management
–
–
–
GitHub pull requests
–
–
–
MCP
–
–
–
Terminal
–
–
–
Website testing
–
–
–
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
2
0
0
0
Verified listing
–
–
–
–

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.