Mailspring
An open-source, lightweight email application for Windows, Mac, and Linux with a focus on efficiency and local processing
- Also known as
- mailspring
Available worldwide
What is Mailspring?
Mailspring is a desktop email client built as open source that runs your sync engine locally without sending credentials to remote servers. It includes core features like unified inbox, snooze, scheduled sending, and mail rules, with optional premium capabilities available through a paid subscription.
Mailspring pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free open source core + monthly paid Pro tier
Free
FreeOpen source version with core email features
- Unified Inbox
- Snooze
- Send Later
- Mail Rules
- Templates
Mailspring Pro
Premium subscription unlocking additional features
- Link tracking
- Read receipts
- Mailbox analytics
- Contact profiles
- Company profiles
What Mailspring does
The capabilities that matter for email clients, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Local direct imap client
- Universal imap smtp exchange support
- ✓
- Keyboard shortcut only navigation speed
- -
- Split inbox AI auto categorization
- -
- Read receipts and open tracking
- ✓
- Snooze and scheduled send later
- ✓
- Generative AI LLM email drafting
- -
- Conversational chat layout view
- -
- Unified multi account inbox view
- ✓
- Pgp end to end encryption support
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- Freemium
Platform & deployment
Independently observed- macOS
- Linux
- Windows
- Self-hosted
Integrations (8)
Independently observed- Gmail
- iCloud
- Office 365
- FastMail
- Outlook.com
- Yahoo!
- IMAP
- SMTP
Mailspring FAQ
Common questions about Mailspring, answered from independent, dated evidence.
What is Mailspring?
A lightweight desktop application for Mac, Windows, and Linux that brings together multiple email accounts from different providers into one unified inbox. Core features run locally on your computer, with optional paid features for message tracking, scheduling, and productivity analytics. It is indexed under Email Clients.
Source: https://getmailspring.com
Is Mailspring free to use?
Mailspring is open source, so it can be self-hosted and used at no licence cost. It is released under the GPL-3.0 licence. A commercial or hosted edition starts at $8 per month. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.
Source: https://getmailspring.com
What platforms does Mailspring support?
Mailspring supports Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://getmailspring.com
What does Mailspring integrate with?
We have confirmed 8 integrations for Mailspring, including Gmail, iCloud, Office 365, FastMail, Outlook.com, Yahoo!, IMAP and SMTP. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://getmailspring.com
Is Mailspring open source?
Yes. Mailspring is published under the GPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Mailspring alternatives
Other email clients we track, ranked by the same independent score.
- Proton MailEmail service with end-to-end encryption that protects privacy by preventing message scanning and advertising usemedium · 72%
- SuperhumanAn integrated suite combining email, writing assistance, document collaboration, and AI agents that work across your existing applicationsmedium · 73%
- Canary MailAn email client that adds end-to-end encryption, phishing protection, and tracker blocking to your existing email accountshigh · 75%
- SpikeUnified email and messaging platform for team collaborationlow · 49%
- MimestreammacOS email application for managing multiple Google accounts across devicesmedium · 54%
- Spark MailAn intelligent email client that filters distractions so you can focus on priority messagesmedium · 74%
Compare Mailspring
Side by side against other email clients, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Mailspring, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 67 | 0.09 | 6.2 | ✓ |
| Development activity | 63 | 0.09 | 5.9 | ✓ |
| Release cadence | 93 | 0.05 | 4.9 | ✓ |
| Price level | 80 | 0.05 | 4.2 | ✓ |
| Pricing transparency | 45 | 0.08 | 3.8 | ✓ |
| Integrations | 26 | 0.09 | 2.4 | ✓ |
| Stars | 80 | 0.03 | 2.1 | ✓ |
| Reliability | 0 | 0.06 | 0.0 | - |
| Dependent projects | 0 | 0.06 | 0.0 | - |
| Security posture | 0 | 0.06 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Security score | 0 | 0.04 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-10-05 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 17,885 | highsource · 2026-10-05 · 90% |
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Pricing model: freemium · Deployment model: local_direct_imap_client · Read receipts and open tracking: Yes · Snooze and scheduled send later: Yes · Unified multi account inbox view: Yes · Universal imap smtp exchange support: Yes | mediumsource · 2026-10-05 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 7 | mediumsource · 2026-08-21 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-10-05 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | GPL-3.0 | highsource · 2026-10-05 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-21 · 75% |
Pricing
Release
Is Mailspring the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Mailspring against the rest of the email clients we index, using the same dated evidence weighted your way.
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