Side by side
Dodona vs Observable
Both stand on coding playgrounds. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIExtensionWeb
Dodona combines code practice, automated assessment, debugging, and teaching analytics in one platform. Its free plan and broad language support may suit educational programming programs, while API limitations and the listed paid student license require attention.
Visit Dodona
Free plan Self-hostedWeb
Observable brings data analysis, explanation, and collaboration into notebook documents. Check the plan limits and database-access behavior before sharing work that uses a connector.
Visit ObservableThe facts
| Dodona | Observable | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Extension, Web | Self-hosted, Web |
| Lowest paid plan | Student License: $2 a month | Pro: $22 a month |
| Plans published | 4 | 4 |
| Maker | Dodona | Observable |
| Website | dodona.be | observablehq.com |
| On coding playgrounds | #38 of 138 | #34 of 138 |
Dodona: what it does well
- Automated correctness, performance, and style feedback
- Supports more than 20 programming languages
- Visual debugger steps through code line by line
- Real-time individual and group learning analytics
- Free plan available
What to know first
- API documentation is not complete
- No deployment options are listed
- Student License costs $2 a month, billed annually
Observable: what it does well
- Cells display live values alongside code.
- Real-time editing, comments, and version history.
- Hosted connectors cover multiple databases.
- Supports local development and self-hosting.
What to know first
- Sharing a connected notebook revokes its database access.
- Free includes only 1 GB monthly file attachments.
- Pro compute is limited to 50 minutes monthly.
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