| What it does | Email warmup service that improves deliverability and sender reputation
| SMS API and CPaaS platform for OTPs and alerts
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| Stage | Not given
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| Founded | Not given
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| Based in | SK
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| Pricing model | Freemium
| Paid
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| Pricing | Not given
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| Key features | - Sync inbox to network of 30,000+ real inboxes
- Automated interactions: replies, marking as important, removing from spam
- Email health monitoring and reports
- Spam filter monitoring
- Email reputation check
- Outreach sequences
- Custom warm up settings (Pro plan)
- Scheduled warm up (Pro plan)
| - REST API and SMPP 3.4 protocol support
- Routes tested on real phones
- Campaign management with CSV import
- OTP by SMS and Telegram
- Fraud protection with spending and OTP limits
- Real-time delivery analytics
- Mobile apps for iOS and Android
- Public pricing by country
- Message price shown before sending
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| What makes it different | - 30,000+ real inboxes used by real people in the network
- One of the first companies to offer email warmup services
- Simple and straightforward platform and pricing
- Can help resurrect domains with poor reputation
| - Every route tested on real phones to verify delivery receipts
- No monthly fee, no minimum contract required
- Fraud protection stops invalid sends before charging
- Message price and part count visible before sending
- One platform across REST API, SMPP, web app and campaigns
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 62 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 29 | 0 |
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| Citation Flow (Majestic) | 46 | 0 |
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| Referring domains (Majestic) | 1824 | 0 |
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Warmup Inbox
Siel