WarmupHero
WarmupHero: A free, Microsoft-focused warmup tool with useful analytics and narrow ecosystem coverage. Ranked #24 of 24 in Email Warmup Software by our editors (6.6/10); pricing: Free plan; best for users wanting completely free Microsoft-focused warmup.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forUsers wanting completely free Microsoft-focused warmup
- Free planYes
- Paid fromFree
- Warmup networkShared
- Facts checked20 Sep 2026
Where it wins
- Progressively increases sending volume with human-like sequential emails
- Tracks inbox, spam, and category-folder placement
- Supports Office 365 API connections and spam-folder recovery
Where it doesn't
- The warmup network is shared rather than dedicated
- Integration coverage centers on SmartReach.io
- The Free plan is bundled with SmartReach plans
Our verdict on WarmupHero
WarmupHero is an email warmup service for users improving the deliverability of outbound campaigns. It progressively increases sending volume, exchanges warmup emails with real people, maintains conversation threads, and shows whether messages reach inboxes, spam, or category folders such as Promotions and Updates. It is especially suited to Microsoft-focused workflows through its Office 365 API connection, while other business email accounts can connect through SMTP and IMAP details.
Pricing is straightforward: the Free plan is included with all SmartReach plans. The published offer combines progressive email warmup automation with inbox, spam, and category-folder analytics, sequential sending, threaded replies, spam-folder recovery, and important marking. Custom warmup signatures, images, and links provide control over the messages used in the warmup process. WarmupHero is available through the web and a Chrome extension.
Its main strength is the depth of its warmup workflow: conversation-thread maintenance, replies, human exchanges, and folder-level reporting go beyond simple volume increases. Office 365 API support also gives Microsoft users a direct connection option. The tradeoff is a narrow ecosystem, with SmartReach.io listed as the integration and a shared warmup network rather than a dedicated one. Users seeking Microsoft-focused warmup with no separate WarmupHero charge should consider it; teams needing broader platform coverage or a standalone paid plan should look elsewhere.
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WarmupHero pricing
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WarmupHero fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Warmup network | Shared |
| Daily email limit | Not verified |
| Mailbox providers | Not verified |
| Custom warmup schedule | Not verified |
| Spam monitoring | Yes |
| Multiple mailboxes | Not verified |
| Deployment | Cloud, Browser extension |
| Platforms | Web, Chrome extension |
| Support | Email, Docs |
| Built for | Small business, Mid-market (editorial estimate) |
| Integrations | 1 integrations: SmartReach.io |
| Pricing | Free plan (source) |
| Website | warmuphero.com |
| Facts checked | 20 Sep 2026 |
WarmupHero integrations
WarmupHero lists 1 integrations on its own site.
- SmartReach.io
Alternatives to WarmupHero
- TrulyInboxBroad mailbox coverage, configurable warmup, and deliverability monitoring with a free plan.9.4
- WarmyA broad deliverability suite for teams managing warm-up, placement, reputation, and authentication.9.2
- WarmerlyA private-network warmup platform with a useful free tier and broad mailbox support.9.0
See all WarmupHero alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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