Smartlead

Smartlead is a cold email platform for agencies and outbound sales teams, with warmup, sequences and lead data on flat plans with unlimited mailboxes.

Smartlead runs outbound email at volume, from buying and warming the sending mailboxes to sorting the replies that come back. The platform belongs to 521 Products Pty Ltd, an Australian registered business that trades under the Smartlead and SmartProspect names. Its focus is deliverability. Mailboxes are warmed, rotated and held to daily limits, so a campaign spreads across many senders instead of wearing out one domain. Campaigns are sequences of email steps with wait times, Manual Task steps and Call steps, and each lead leaves the sequence once it replies. Steps carry variants for A/B testing, Write with AI drafts copy from a prompt, and AI Spintax varies the wording between sends. Replies from every connected mailbox land in the Master Inbox, where AI categorization files them into lead categories and the Reply Agent can answer. SmartProspect supplies verified business contacts with email and phone enrichment, and the Global Block List keeps unsubscribed people and blocked domains out of every campaign. SmartSenders, SmartServers, SmartDelivery and SmartDialer extend this with purchased mailboxes, dedicated servers, inbox placement tests and browser calling. Agencies running outreach for clients are the core audience, alongside sales teams and the GTM engineers who connect outreach to other systems. Agencies get client workspaces that can carry their own branding, and engineers get an API and webhooks on every plan above Base. Subscriptions are flat monthly plans sized by stored contacts, monthly sends and verified lead allowance, with no charge per seat or per mailbox. Sending infrastructure, calling and placement testing are bought as add-ons, and every plan bills monthly or yearly. An agency usually opens one workspace per client, builds a list in SmartProspect or pulls one from Clay, and launches it through mailboxes that SmartSenders supplied and warmup has prepared. Leads can also arrive through Zapier or a webhook whenever another system flags someone worth contacting. Interested replies surface in the Master Inbox for a rep to pick up, and a Call step hands warm leads to SmartDialer when a phone call will move faster than another email. That loop of sourcing, sending and answering suits agencies and outbound teams whose pipeline depends on cold email reaching the primary inbox.