Spark +AI vs thread.
| Spark +AI | thread. | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | $10/mo | Free |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Windows | — |
| Free plan | Yes | Yes |
| Paid from | 10 /user/mo | — |
| Inbox triage | Yes | — |
| AI reply drafting | Yes | — |
| Automatic sending | No | — |
| Thread summaries | Yes | — |
| Follow-up actions | Yes | — |
| Email platforms | other | — |
Both are listed in Best AI Email Assistants. On Inferse, Spark +AI scores higher on our published basis.