Doc-like surface for writing (notes, meeting minutes, etc.)
Coda starts as a doc, so you can write long-form memos, planning documents, or other text-based content, and store that alongside your data.
Task-tracking capabilities
Both monday.com and Coda have tables that allow you to store any type of data - task, project, resource, team, etc. Tasks or “pulses” in monday.com are automatically put into “parent” groups. You can define multiple level of groups in Coda. Coda’s tables also act more like databases allowing you to relate a table of tasks to tables of projects, teams, and people.
Sub-tasks
No native sub-task feature in monday.com. A workaround is to set a group equal to a task, and then everything in the group becomes a sub-task. Or you can Leave updates in the individual task.
You can do this in Coda by customizing a table - adding a 'sub-task' column, for instance, or even using Lookups to connect a task and a sub-task table together.
Custom Fields
Free in Coda - just a matter of adding another column to a table. It takes one second
All custom column types in monday.com are free except the formula column type (requires Pro or Enterprise plan).
Collaborative surface (editing in real-time)
Customized attributes (dates, checklists, select-lists, and more)
Both products have richly formattable data types.
Mobile (iOS, Android)
Both products support mobile editing.
Desktop App
Monday.com has a Mac and Windows desktop app.
Commenting / at-mentioning
Both products support hitting "@" and commenting at or notifying your colleagues.
Automations / workflow (i.e. send email update on regular cadence
Both apps support automations. In monday.com, you need to be on the Standard plan (at least) to start using a limited number of Automations; in Coda the feature has a threshold on the free tier.
Customizable buttons for app-like functionality
Monday.com has a button to add new items (tasks) to your boards, but does not allow users to add or customize buttons. For instance, click a button which automatically sends an email to a particular set of stakeholders.
Automations to schedule triggered updates
File uploads
In monday.com, You can add files to individual tasks on a board. This is on the Coda roadmap and being worked on!
Universal search
In monday.com, you can search across all your boards for tasks where you are mentioned. In Coda, you can search within a doc but not across docs.