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MailMaestro (formerly Flowrite) vs Open Notebook
A side-by-side comparison of pricing, ratings, features, pros and cons.
| Overview | |||
| Description | AI email writing assistant, now part of MailMaestro after Maestro Labs acquired Flowrite. | An open source implementation of NotebookLM with more flexibility and features. | |
| Category | |||
| Developer | Maestro Labs | Open-notebook | |
| Verified Status | No | No | |
| Last Updated | Aug 2026 | Aug 2026 | |
| Pricing | |||
| Pricing Model | Freemium | Open Source | |
| Free Plan | No | Yes | |
| Free Trial | No | — | |
| Open Source | No | Yes | |
| Capabilities | |||
| API Access | No | — | |
| Features | • Write emails from scratch in multiple languages • Rewrite and polish existing drafts • Summarize long email threads and attachments • Generate context-aware thread replies | — | |
| Tags | email writingAI writing assistantproductivity | opennotebooksourceimplementationnotebooklmflexibility | |
| Trust and Engagement | |||
| Review Count | 0 | 0 | |
| Saves | 0 | 0 | |
| Views | 4 | 40 | |
| Quality Score | 49/100 | 54/100 | |
| Website Status | Online | Online | |
| Availability | |||
| Website | maestrolabs.com | www.open-notebook.ai | |
| Social Links | 1 linked | 1 linked | |
| Screenshots | No | No | |
| Reviews | |||
| Pros | • Free to use | • Free to use | |
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Both tools are closely matched on rating — the better fit depends on your specific needs. See the full feature and pricing comparison above.
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