| Contact model | Name, company, tags, next follow-up, and created time | You decide fields, validation, and editing flow | Often includes many sales and organization fields |
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| Interaction history | Dated notes linked to a contact and global timeline | Requires linked records and sorting | May include email and call automation |
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| Follow-up workflow | One date per person with open, one-week snooze, and done | You define states and date behavior | Often tasks, sequences, and team assignments |
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| Import and export | Not included in the current app | Can be designed for exact sources | Commonly available with provider-specific mapping |
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| Data location | One browser localStorage record | You choose local or remote architecture | Usually provider-hosted cloud data |
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| Collaboration | Single-browser, single-user behavior | Can be designed around a team | Usually central to the product |
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| Customization | MIT source and a small inspectable domain model | Maximum freedom but no working flow | Limited to fields and settings exposed by the vendor |
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