The best free emailwarmup tools in 2026.

The closest thing to free standalone warmup, and the only one you can run without ever paying.

Where it wins. The free tier never expires: one connected account, 10 warmup emails a day, on a network of real accounts. If you want to watch warmup work before you spend anything, this is where to start. Pricing is also flat by daily volume, so the paid tiers from $22 a month do not charge per inbox, though that volume is shared across every account you connect, so it suits light warmup more than a big roster. It is the warmup engine Saleshandy resells, so plenty of teams are already running it without knowing the name.

Where it falls short. Ten a day is barely a trickle. It is enough to see the dashboard move, not enough to warm a mailbox you are about to send real volume from, so most people outgrow the free tier inside a week. The pool mixes Gmail, Outlook and other providers rather than being Google and Microsoft only.

Warmup included free and unlimited on every paid plan, alongside a big all-in-one toolkit.

Where it wins. There is no separate warmup charge at any tier, and the warmup itself is unlimited, which is rare. If you are already paying for Instantly to send and find leads, the warmup is effectively a feature you have already bought rather than a line item.

Where it falls short. It is only free in the sense that it comes with a paid platform from $47 a month. The warmup pool size is quoted inconsistently across its own pages, and reviewers say the heat scores do not always match real inbox placement.

A 7-day trial with no card, sitting in front of the lowest standalone entry price.

Where it wins. You get a week to try it without handing over a card, and the paid plan that follows starts at $15 an inbox a year, the cheapest standalone warmup here. The pool is real accounts from Google and Microsoft among others, and there is language and ESP warmup on the higher tiers.

Where it falls short. The trial is seven days, not a permanent free tier, so this is a test drive rather than a free tool. Per-inbox pricing climbs fast once you are warming more than a couple of mailboxes, and the network is smaller than some rivals.

A 7-day trial of warmup priced by volume with unlimited mailboxes.

Where it wins. The trial lets you test the flat model before paying, and from $29 a month you get unlimited mailboxes on a daily-volume plan, which suits agencies warming many accounts. It is the warmup engine behind Woodpecker, and it ships a warmup API.

Where it falls short. No free-forever tier, just the trial. The shared daily volume gets thin once you are past five or six inboxes, and the headline pool size is vendor-stated and disputed. Providers are mixed rather than Google and Microsoft only.

A 7-day no-card trial of the deepest standalone warmup and deliverability suite here.

Where it wins. The trial is the cheap way to test the most capable standalone tool: AI-written warmup across topics and 30-plus languages, seed-list placement testing and a Google Postmaster integration. It warms providers a Google and Microsoft pool will not touch, like Yahoo, Amazon SES and Zoho.

Where it falls short. After the trial there is no public price at all. Warmy pulled its prices in 2026, so you book a demo to learn the cost, and per-inbox pricing scales painfully past a handful of mailboxes. There are recurring reports of weak Microsoft results.