Mailwell vs spFlat!
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Mailwell compared with spFlat!
| Detail | 
Mailwell | S
spFlat! |
|---|
| What it does | A calm, fast mail app for Mac
| Automated SPF flattening service that prevents email delivery failures by managing SPF records within DNS lookup limits
|
|---|
| Stage | Startup
| Not given
|
|---|
| Founded | 2026
| Not given
|
|---|
| Based in | US
| NL
|
|---|
| Pricing model | Free trial
| Freemium
|
|---|
| Pricing | Monthly: $5 USD; Yearly: $49 USD; Founder Lifetime (first 50): $59 USD (valid until December 31, 2026); then $129 USD
| Free 14-day trial. After trial: €10 per domain per month. No setup fees, cancel anytime.
|
|---|
| Key features | - Unified inbox for multiple accounts
- Multiple reading pane options (Slide In, Side by Side, Full Window)
- Inbox tabs for every account (Primary, Social, Promos, Updates)
- Keyboard shortcuts and command palette
- Saved replies and snippets
- Snooze and quick actions
- Rules for sorting mail
- Send and Archive in one step
- Undo Send and Send Later
- Optional AI with Apple Intelligence or custom API key
| - Automatic SPF record flattening
- DNS lookup limit prevention
- Real-time SPF monitoring
- 24/7 IP range monitoring
- 1-click DNS updates
- Free SPF lookup audit
- 99.9% uptime SLA
|
|---|
| What makes it different | - Mail stays on your Mac with no Mailwell servers in between
- No tracking or analytics, private by design
- Support for JMAP protocol with native integration
- Works with any IMAP or JMAP account, not just popular providers
- Lifetime license option for early adopters
| - Automatically converts complex SPF include chains into flat records using only 1 DNS lookup instead of many
- Continuously monitors email provider IP changes and updates your SPF record 24/7 automatically
- Improves email deliverability by up to 15% through proper SPF record management
- ISO 27001 and NEN 7510 certified hosting with GDPR compliance
|
|---|
| Community votes | 0 | 0 |
|---|
| DR (Domain Rating by Ahrefs) | 3 ▼ −1 (down) since last check | Not checked yet ● no change since last check |
|---|
| Trust Flow (Majestic) | 5 | 3 |
|---|
| Citation Flow (Majestic) | 18 | 11 |
|---|
| Referring domains (Majestic) | 12 | 4 |
|---|
6 details filled in for both companies.
More alternatives to Mailwell More alternatives to spFlat!