Gmelius vs Mailspring
Gmelius
gmelius.comMailspring
getmailspring.comSide by side
| Figure | Gmelius | Mailspring |
|---|---|---|
| Price from | $19/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Plans published | 7 | 4 |
| Spec score · Email clients | 8.9 (#13) | 9.0 (#9) |
| App coverage | all | desktop |
| Calendar tools | Yes | No |
| Company | The legal hub identifies the company as Gmelius SA (Gmelius Ltd), a Swiss-registered corporation, and lists its address in Meyrin, Geneva, Switzerland. | Mailspring is built and maintained by Foundry376, described by the maker as a small, independent team with no outside investors. |
| Free plan | No | Yes |
| Headquarters | Geneva, Switzerland | San Francisco, California, United States |
| Integrations | Listed integrations include Google Groups, Google Workspace Admin, Meet, Calendar, Salesforce, HubSpot, Slack, Trello, Nicereply, Zapier, Make, and Relay.app. | Mailspring syncs directly with mail providers using IMAP and with calendars and contacts using CalDAV and CardDAV. |
| Platforms | Gmelius provides a browser extension, web app, and PWA for iOS and Android; it also links to API documentation. | Downloads are offered for Windows, macOS, and Linux, including Windows ARM64, Apple Silicon, and Linux ARM packages. |
| Product | Gmelius is a Gmail-native platform for building and running AI agents that handle defined team jobs across connected tools. | Mailspring is a native desktop email client for people who take email seriously. |
| Security | The security page says Gmelius uses Google OAuth and encrypts data in transit and at rest; it also states email content is not stored. | Email credentials are stored in the system keychain, and Mailspring says it does not transmit, store, or process email in the cloud. |
| Support | Gmelius offers a free 30-minute onboarding call and describes customized onboarding and account configuration assistance for teams. | For security vulnerability reports, the maker gives [email protected] and says users can expect a response within a few hours. |
| Unified inbox | Yes | Yes |
Plans
Gmelius
- Meli$19 a month
- Growth$25 a month
- Pro$40 a month
- EnterprisePriced on request
- Meli$228 a year
- Growth$300 a year
- Pro$480 a year
Mailspring
- BasicPrice not published
- Mailspring Pro$8 a month
- FreeFree
- Mailspring Pro$8 a month
In their own words
Gmelius
Gmelius is a Gmail-native platform for creating AI agents that carry out defined team jobs across connected tools. Users describe an agent’s task in plain language, choose the inbox it monitors, connect tools, and decide which actions need approval, without writing code. Meli, described as an AI Chief of Staff, supplies agents with context about a team’s clients, history, and priorities. Gmelius also provides shared Gmail inboxes and labels, shared drafts, email notes and mentions, delegation, templates, analytics, calendar tools, and scheduled sending. Listed integrations include Google Groups, Google Workspace Admin, Meet, Calendar, Salesforce, HubSpot, Slack, Trello, Nicereply, Zapier, Make, and Relay.app. The Gmail extension supports Chrome, Microsoft Edge, Brave, and Opera; listed platforms also include Android, iOS, API, and web. There is no free plan, but a seven-day trial gives access to Growth; afterward, users must choose a paid plan or the account is suspended. Prices start at $19/user/mo (annual).
Mailspring
Mailspring is a desktop email client for Linux, macOS, and Windows, with support for multiple accounts in one inbox. It connects to Gmail, iCloud, Office 365, Fastmail, Outlook.com, Yahoo!, and IMAP/SMTP providers, and indexes email for advanced Gmail-style searches across connected accounts. The client works offline and supports scheduled sending. Its free features include undo send, spell and grammar checking, custom themes, dark mode, and localization. Pro adds read receipts, link tracking, send later, follow-up reminders, templates, contact profiles, snoozing, and mailbox insights. Mailspring connects to mail providers through IMAP and to calendars and contacts through CalDAV and CardDAV, though calendar tools are not included in the app. It can translate drafts into Spanish, Russian, simplified Chinese, French, and German, and offer to translate incoming messages. Mailspring says credentials are kept in the system keychain and email is not processed in the cloud. The free plan is available; Pro costs $8 a month, billed monthly.