GitHub Copilot vs Diffblue Cover vs Tabnine vs Devin

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
Tabnine
Competitor 3
Devin
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 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 Tabnine
tabnine.com
AI coding with privacy built in
Make main Remove
Competitor Devin
cognition-labs.com
AI that codes independently
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
637.9Mvisits/mo
—
131.2Kvisits/mo
923visits/mo
MoM change
▲ 3.7%
—
▼ 22.7%
▼ 32.7%
6-month growth
+19.3%
—
-53.5%
—
Global rank web
#49
—
#283,229
#13,704,365
Avg. last 3 months
629.7M
—
164.1K
764
Bounce rate lower is better
36%
—
46%
39%
Pages / visit
5.9
—
1.7
1.1
Visit duration
6m 26s
—
28s
—
Traffic sources
● Direct 83% · ● Referral 15%
—
● Direct 82% · ● Referral 17%
—
GitHub CopilotDiffblue CoverTabnineDevin
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 · 637.9MTabnine · 359.1KTabnine · 311.6KTabnine · 301.4KTabnine · 275.9KTabnine · 281.9KTabnine · 248KTabnine · 241.5KTabnine · 191.4KTabnine · 169.7KTabnine · 131.2KDevin · 1.4KDevin · 9231001K10K100K1M10M100M1BGitHub Copilot · 484.3MGitHub Copilot · 504MGitHub Copilot · 542.6MGitHub Copilot · 534.8MGitHub Copilot · 634.3MGitHub Copilot · 631MGitHub Copilot · 636.1MGitHub Copilot · 615.2MGitHub Copilot · 637.9MTabnine · 359.1KTabnine · 311.6KTabnine · 301.4KTabnine · 275.9KTabnine · 281.9KTabnine · 248KTabnine · 241.5KTabnine · 191.4KTabnine · 169.7KTabnine · 131.2KDevin · 1.4KDevin · 923Nov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Freemium
Paid
Freemium
Paid
Starting price
$4per month · free tier available
$1,500per month
$39per month
—
Free tier
–
–
–
Free trial
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API access
–
–
–
–
Plans
Free FreeTeam $4/moEnterprise $21/mo
Starter package $1,500Enterprise Custom
Code Assistant $39/moAgentic Platform $59/mo
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Capabilities input → output
Input
CodeText
Code
CodeText
CodeText
Output
Code
Code
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 & CodeProductivity & OfficeAI AgentAI Code Review+1 more
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
9
9
2
9
Coding
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Agents
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Code autocompletion
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–
Code testing
–
–
Code reviews
–
–
Debugging
–
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Development
–
–
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Test creation
–
–
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Test generation
–
–
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Unit tests
–
–
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Coding in VS Code
–
–
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Test automation
–
–
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Testing
–
–
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Vs code
–
–
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Agent management
–
–
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GitHub automation
–
–
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GitHub management
–
–
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GitHub pull requests
–
–
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Software engineering guidance
–
–
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Terminal
–
–
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Test cases
–
–
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 0
▲ 2
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
2
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.