Side by side
Inbox Zero vs InReply
Both stand on ai email assistants. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial AndroidAPIExtension+3
Inbox Zero combines inbox automation, reply drafting, meeting briefings, and analytics across web and mobile access. Its paid-only model and per-user pricing should be weighed against its open-source and self-hosting options.
Visit Inbox Zero
Free trial Web
InReply combines knowledge-based email drafting, classification, workflow routing, and shared inbox collaboration. Its plan limits, paid-only model, and review controls make the subscription structure important to evaluate.
Visit InReplyThe facts
| Inbox Zero | InReply | |
|---|---|---|
| Free plan | A free trial | A free trial |
| Open source | Not published | Not published |
| Runs on | Android, API, Extension, iPhone, Self-hosted, Web | Web |
| Lowest paid plan | Starter: $20 per user a month | Starter: £39 a month |
| Plans published | 4 | 4 |
| Maker | Not published | Not published |
| Website | inbox-zero.ai | inreply.ai |
| On ai email assistants | #24 of 46 | #28 of 46 |
Inbox Zero: what it does well
- Works with Gmail, Google Workspace, and Outlook
- Drafts replies in the user's voice
- Plain-English rules configure labels and actions
- Open source and self-hostable
- 7-day trial available
What to know first
- No free plan
- Paid plans start at $20 per user monthly
InReply: what it does well
- Replies grounded in supplied business content
- Confidence thresholds and Ghost Mode
- Gmail, Outlook, and Microsoft 365 connections
- Shared inbox without shared credentials
- 14-day trial
What to know first
- No free plan
- Starter limits usage to 500 emails monthly
- No browser extension
Alternatives to Inbox Zero Alternatives to InReply The whole list