Alternatives · Cold Outreach
Warmbox alternatives
As of Nov 13, 2026, the best Warmbox alternative for most people is Saleshandy (2.8 GPA), second in our ranking of cold outreach tools. The best free one is Folderly (2.0 GPA).
Warmbox compared with 9 alternatives: Mailivery, Folderly, Instantly, Smartlead, Saleshandy and 4 more.
Warmbox is a paid product, starting at $15 per month for 1 inbox (the page's other billing toggle shows $19). 2 of the 9 alternatives are free or have a free plan. 4 more offer a free trial.
Listings checked up to Nov 12, 2026 · Where the facts come from
Black Friday: is there a Warmbox sale?
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| WarmboxThis tool | From $15/mo | No | Web |
| Mailivery | Free trial · from $21.75/mo | Trial only | Web |
| Folderly | Free plan · from $79/mo | Yes | Web |
| Instantly | Free trial · from $37.6/mo | Trial only | Web |
| Smartlead | Free trial · from $32/mo | Trial only | Web, iOS, Android |
| Saleshandy | Free trial · from $34/mo | Trial only | Web |
| EmailGuard | Free plan · from $49/mo | Yes | Web |
| Infraforge | From $4/mo | No | Web |
| Mailforge | From $3/mo | No | Web |
| Zapmail | From $39/mo | No | Web |
Price against what you get
Warmbox starts at $15 a month and scores 2.0 out of 4 on features, ease of use and platforms. None of the 9 alternatives on this chart both scores higher and starts lower.
Mailivery, Folderly, Instantly, Smartlead and Saleshandy score higher without starting lower. Infraforge and Mailforge start lower without scoring higher.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
How each one differs from Warmbox
Mailivery
Email warm-up priced by daily volume, with unlimited mailboxes
- Mailivery starts at $21.75 per month, billed yearly ($29 billed monthly).
- Mailivery also covers email verification.
- Mailivery does not cover reports, which Warmbox does.
Suits: Agencies warming many mailboxes under one volume cap
Folderly
Email deliverability tools: placement tests, fixes and monitoring
- Folderly starts at $79 per month (Inbox Insights); $96 per mailbox / month, billed yearly (Folderly).
- Folderly has a free plan, which Warmbox lacks.
- Folderly also covers dMARC.
- Folderly does not cover inbox warm-up, which Warmbox does.
Suits: Teams sending cold email from many mailboxes who need to diagnose spam placement
Instantly
Cold email from unlimited inboxes, priced by emails and contacts
- Instantly starts at $37.6 per month for 5,000 emails, billed yearly ($47 monthly).
- Instantly also covers workflow automation, AI agents and email campaigns.
- Instantly does not cover reports and inbox warm-up, which Warmbox does.
Suits: Agencies and teams spreading volume across many mailboxes
Smartlead
High-volume cold email with unlimited mailboxes and client workspaces
- Smartlead starts at $32 per month for 6,000 emails, billed yearly ($39 monthly).
- Smartlead also lists iOS and Android apps.
- Smartlead also covers sales pipeline, AI agents and email campaigns.
- Smartlead does not cover reports and inbox warm-up, which Warmbox does.
Suits: Lead generation agencies running outreach for several clients
Saleshandy
Cold email sequences with a B2B lead database in every plan
- Saleshandy starts at $34 per month for 6,000 emails, billed yearly ($41 monthly).
- Saleshandy also covers shared inbox and email campaigns.
- Saleshandy does not cover reports and inbox warm-up, which Warmbox does.
Suits: Small teams that want lead data and sending on one bill
EmailGuard
Email deliverability monitoring and domain masking for cold email
- EmailGuard starts at $49 per month.
- EmailGuard has a free plan, which Warmbox lacks.
- EmailGuard also covers email verification and dMARC.
- EmailGuard does not cover reports and inbox warm-up, which Warmbox does.
Suits: Cold email agencies running many secondary domains
Infraforge
Private cold email infrastructure on dedicated IPs
- Infraforge starts at $4 per mailbox slot / month, billed quarterly, with a 10-slot minimum.
- Infraforge also covers dMARC.
- Infraforge does not cover reports, which Warmbox does.
Suits: Senders who want dedicated IPs for cold email
Mailforge
Shared-IP domains and mailboxes built for cold email sending
- Mailforge starts at $3 per mailbox slot / month, billed monthly, with a 10-slot minimum.
- Mailforge also covers dMARC.
- Mailforge does not cover reports, which Warmbox does.
Suits: Cold email senders who run many domains and mailboxes
Zapmail
Google Workspace mailboxes and domains for cold email
- Zapmail starts at $39 per month for 10 Google Workspace mailboxes, billed monthly.
- Zapmail does not cover reports, which Warmbox does.
Suits: Agencies and teams running cold email from many Google Workspace mailboxes
Limits worth knowing in Warmbox
- The pricing page does not state which billing period each of its two price sets applies to; the default view shows $15 for Solo and the other toggle shows $19.
- Plans are sized by the number of inboxes (1, 3 or 6) and by emails a day, so larger setups need a custom plan.
- The vendor says warm-up usually takes 15 to 30 days of uninterrupted warming before results show.
- It warms mailboxes only; it does not send campaigns or find leads.
Common questions
What are the alternatives to Warmbox?
The alternatives to Warmbox in this directory are Mailivery, Folderly, Instantly, Smartlead, Saleshandy, EmailGuard, Infraforge, Mailforge and Zapmail. Each one has a side-by-side comparison with Warmbox.
Is there a free alternative to Warmbox?
Yes. Folderly and EmailGuard have a free plan alongside paid ones.
Which Warmbox alternatives work on Android?
The Warmbox listing does not include an Android app. Smartlead lists one.
Which Warmbox alternatives work on iOS?
The Warmbox listing does not include an iOS app. Smartlead lists one.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 17, 2026 to Nov 12, 2026. Vendors change prices without notice, so confirm on their site before you buy.