# Warmup Inbox

> Warmup Inbox is an email warmup and deliverability service operated by CyberPanda s. r. o. It builds sender reputation by exchanging realistic conversations across a network of 30,000+ real inboxes, keeping warmed senders at 98%+ inbox placement. Every plan starts with a 7-day free trial.

## Key pages

- [Home](https://www.warmupinbox.com/): Product overview, how warmup works, and a free inbox placement test
- [Email warmup](https://www.warmupinbox.com/product/email-warmup/): The core warmup product, network details, and warmup schedule
- [Pricing](https://www.warmupinbox.com/pricing/): Per-inbox plans, monthly and annual billing, 7-day free trial
- [Integrations](https://www.warmupinbox.com/integrations/): Supported providers, including Gmail, Outlook, Amazon SES, SendGrid, Mailgun, Zoho, and Sendinblue (Brevo)
- [Free tools](https://www.warmupinbox.com/tools/): Free email tools, including a placement test, blacklist checker, SMTP tester, and DMARC and SPF generators
- [Placement test](https://www.warmupinbox.com/tools/placement-test/): Free test that shows where your email lands at major providers
- [Customer stories](https://www.warmupinbox.com/customers/): Case studies from teams using Warmup Inbox
- [Request a demo](https://www.warmupinbox.com/demo-request/): Book a walkthrough with the team
- [All comparisons](https://www.warmupinbox.com/comparisons/): How Warmup Inbox compares to other warmup tools
- [Lemwarm alternative](https://www.warmupinbox.com/lemwarm-alternative/): Warmup Inbox compared with lemwarm
- [Warmy alternative](https://www.warmupinbox.com/warmy-alternative/): Warmup Inbox compared with Warmy
- [Instantly alternative](https://www.warmupinbox.com/instantly-alternative/): Warmup Inbox compared with Instantly