Mailjet

Mailjet meters emails sent rather than contacts held, and its free tier carries six thousand a month, which is enough to run a small list indefinitely. Marketing campaigns and transactional sending share one account and one sending reputation. Contacts are uncapped on every plan including the free one, so a large dormant list costs nothing. Editing is collaborative, which is unusual here and is the reason teams pick it over a cheaper single-seat tool.

Free covers 6,000 emails a month with unlimited contacts. Essential is $9 a month for 8,000 emails, Premium is $17 for 15,000 with 500 email previews, and the tier above is $27 for 15,000 with 2,000 previews. Annual billing is offered at a 10 percent discount, and the page carries a currency selector already set to US dollars.

A small team that wants a permanent free tier and expects more than one person to touch a campaign, which is the feature most tools at this price do not have. Send-based pricing suits a large list mailed occasionally. Anybody who needs deep behavioural automation will find the flow tools here thinner than Encharge or ActiveCampaign, and should price those instead.