Side by side
Kiwi for Gmail vs Synapse
Both stand on email clients. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial MacWindows
Kiwi for Gmail packages Gmail and Workspace services into a desktop workflow with offline access and account-management features. It is aimed at Gmail users willing to pay for broader desktop controls and plan-dependent tools.
Visit Kiwi for Gmail Paid Windows
Synapse combines a unified Windows inbox with calendar tools, multilingual semantic search and optional local AI. Its one-time €4.99 purchase includes lifetime access and future updates, while platform support remains limited to Windows 11 x86_64.
Visit SynapseThe facts
| Kiwi for Gmail | Synapse | |
|---|---|---|
| Free plan | A free trial | No |
| Open source | Not published | Not published |
| Runs on | Mac, Windows | Windows |
| Lowest paid plan | Not published | Synapse: €4.99, paid once |
| Plans published | None | 1 |
| Maker | Kiwi for Gmail | Synapse |
| Website | kiwiforgmail.com | synapsemail.app |
| On email clients | #127 of 142 | #131 of 142 |
Kiwi for Gmail: what it does well
- Unified inbox with offline access
- Desktop access to Google Workspace apps
- Filters mail by several criteria
- Elite supports up to nine accounts
- Separate windows and workspaces
What to know first
- No free plan
- Requires Gmail; other providers unsupported
- Some tools depend on higher plans
- XO requires an active subscription
Synapse: what it does well
- Unified inbox, offline access and calendar tools
- Search supports more than 100 languages
- Optional local Qwen3.5-4B AI model
- AES-256 credential encryption with hardware TPM key
- Listed plugins include Asana and Google Calendar
What to know first
- Windows 11 x86_64 is the only listed platform
- No free plan
- Requires 16 GB RAM and storage
- Optional AI model needs about 2.5 GB
Alternatives to Kiwi for Gmail Alternatives to Synapse The whole list