WarmupHero
WarmupHero gradually increases an email address’s sending volume to build its reputation and reduce spam risk.
What WarmupHero is
WarmupHero gradually increases an email address’s sending volume to build its reputation and reduce spam risk. It says it works with all email service providers, takes one minute to set up, and runs automatically. Warm-up messages are exchanged with real people and sent sequentially with personalized content. The service keeps messages in conversation threads, automates replies to messages sent from the user’s account, and opens warm-up emails, marks them important, and returns them to the inbox if they land in spam. Analytics show whether messages reach the inbox, spam, Promotions, or Updates. Users can customize messages and add signatures with images or links. Connections include Office365 API and an SMTP/IMAP option for other business accounts; SmartReach.io users connect with a generated API key before adding an email account. WarmupHero is available on the web and as an extension. Its listed free plan is for use with SmartReach.io plans. The privacy policy says it does not access, read, or delete users’ emails, though it may process information provided about recipients and customers.
Good
- Warm-up emails exchange with real people
- Analytics distinguish inbox, spam, and category folders
- Users can customize content and signatures
- Office365 API and SMTP/IMAP connection options
- Privacy policy says it does not read users’ emails
Watch out
- Listed free plan is for use with SmartReach.io plans
- May process information provided about recipients and customers
Who it suits
WarmupHero suits people working on email campaign deliverability, including those who cold email and want to warm up an inbox. SmartReach.io users can access the listed free plan with SmartReach plans.
Verdict
WarmupHero combines automated warm-up activity with folder-level analytics and customizable messages. Check the plan condition and email connection method that fit your account.
Plans and prices
From WarmupHero's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| WarmupHero with SmartReach.io | Free | Use with SmartReach.io · Free with all SmartReach plans |
The facts
Each one read from WarmupHero's own pages, with the date it was checked.
What it does
- Analytics
- Its analytics show how many emails reach the inbox, spam, or category folders such as Promotions and Updates.checked 7 Oct 2026
- Automated setup
- The site says WarmupHero works with all email service providers, takes one minute to set up, and runs on autopilot.checked 7 Oct 2026
- Conversation threads
- WarmupHero says it keeps warm-up emails in the same thread and automates replies to messages sent from the user’s account.checked 7 Oct 2026
- Customization
- Users can customize warm-up emails and include a personalized signature with images or links.checked 7 Oct 2026
- Data handling
- WarmupHero’s privacy policy says it does not access, read, or delete users’ emails, while it may process information users provide about email recipients and customers.checked 7 Oct 2026
- Email connections
- WarmupHero documents Office365 API connection and an “Other” method for business email accounts using SMTP and IMAP details.checked 7 Oct 2026
- Intended users
- The FAQ includes questions about cold emailing and who should warm up an inbox, and the homepage describes improving email campaign deliverability.checked 7 Oct 2026
- Purpose
- WarmupHero describes email warmup as gradually increasing sending volume to build an email address’s reputation and reduce spam risk.checked 7 Oct 2026
- Security and hosting
- The privacy policy says personal data is stored and processed on servers exclusively in the European Union and names Google Cloud, Crisp.im, Google Analytics, and Mailgun as service providers.checked 7 Oct 2026
- Sending pattern
- WarmupHero says it sends personalized emails sequentially to mimic human-like sending and incrementally increase volume.checked 7 Oct 2026
- SmartReach integration
- The SmartReach.io integration uses a generated SmartReach API key, after which the user connects an email account.checked 7 Oct 2026
- Spam handling
- The site says WarmupHero opens warm-up emails, marks them important, and moves warm-up messages back to the inbox if they land in spam.checked 7 Oct 2026
- Support
- The site lists [email protected] as a support contact.checked 7 Oct 2026
- Warmup network
- WarmupHero says users exchange warm-up emails with real people rather than fake email addresses.checked 7 Oct 2026
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