Best free email warmup tool: TrulyInbox’s free plan and the free trials from six vendors

Best free email warmup tool: the short answer

The best free email warmup tool is TrulyInbox's free plan, which warms one account at 10 warm-up emails a day. For more volume the choice is a trial: Warmy and Warmup Inbox give 7 days, InboxAlly 10 days and lemlist 14 days, with lemwarm inside. Smartlead gives a trial with no length stated.

Warm-up means raising the volume sent from a new mailbox step by step, so providers see steady engagement. Paid prices, as read on October 23, 2026: Warmy's plans start from $49 a month and TrulyInbox Starter is $29 a month, both billed monthly.

TrulyInbox's free plan

TrulyInbox's pricing page lists a free plan, "free forever", for 1 account at 10 warm-up emails a day, with no credit card in its words. The next step is Starter at $29 a month billed monthly, or $22 a month billed annually ($264 a year), for unlimited accounts at 200 warm-up emails a day. TrulyInbox also lists a 7-day trial on paid plans and a 14-day money-back guarantee. Cheapest email warmup tool compares paid prices.

Free trials: Warmy, Warmup Inbox, InboxAlly, lemlist and Smartlead

Warmy has no free plan. Its pages describe a 7-day free trial for one mailbox and one user, at 15 to 50 emails a day. Its pricing page says no credit card is required, while its Terms say the trial converts to a paid subscription and charges your payment method unless you cancel before it ends. Warmy's free tools and a free 30-minute deliverability review are not a warm-up plan.

Warmup Inbox says its 7 days of full access to the chosen plan are free if you cancel during the trial. InboxAlly gives 10 days, then Starter is $149 a month billed monthly. lemlist gives 14 days free, with lemwarm in every plan. Smartlead says every plan comes with a free trial. Warmy free trial sets out the terms.

• TrulyInbox for its free plan.
• Warmy to try its warm-up and deliverability test on one mailbox for 7 days.
• Warmup Inbox for a 7-day trial of a paid plan.
• InboxAlly for a 10-day trial of a seed-profile service.

What a free trial can and cannot show

A trial shows how a tool connects, what its dashboard reports and whether its volume limits fit. It cannot show a finished warm-up. InboxAlly's FAQ says full reputation repair typically takes 4 to 8 weeks and describes its trial as a way to evaluate fit. Warmy's own pages put the time a new domain needs between one week and twelve weeks, so its 7-day trial judges fit, not the finished result.

Free fixes that need no tool

Google's sender guidelines, read October 23, 2026, ask every sender to set up SPF or DKIM, to start with a low volume to engaged users and raise it slowly, and to keep the spam rate in Postmaster Tools below 0.3%. Google's FAQ sets the target lower, below 0.1%. Those steps need no paid tool. MailReach's blog calls manual warm-up workable at 10 to 20 emails a day, which is a warm-up vendor's view.

Warmy lists free SPF, DKIM and DMARC checkers and generators and a free email deliverability test; how to set up SPF, DKIM and DMARC walks through the records. Start the 7-day Warmy trial once the domain passes SPF, DKIM and DMARC, so the seven days count, and cancel before it ends if you do not want the paid plan.