Smartlead
Free tierCold email software for sales teams that run outbound at scale
Free tier available·All audiences·API available
Key strengths
Unlimited mailboxes and lead storage with no storage feesAI-powered SmartAgents automate full-cycle prospecting and outreachBuilt-in deliverability infrastructure with dedicated IPs and auto warm-upUnified Master Inbox consolidates replies from all campaigns and clients3x verified leads earned automatically as you send — pipeline scales with usage
Free tier + paid plans
United States
Founded 2022
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- CRM-integrated outbound automation: Developers use Smartlead's REST API and webhooks to push new leads from a CRM into active campaigns and sync reply status back in real time.
- AI agent-driven SDR workflows: Engineers configure SmartAgents to autonomously research leads, generate hyper-personalized email copy, and update CRM fields — replacing manual SDR tasks end-to-end.
- High-volume cold email infrastructure (1M+ emails/month): Technical teams managing 1,000+ mailboxes use SmartInfra's dedicated IPs and sender rotation to sustain deliverability at massive scale.
- Custom deliverability monitoring pipelines: Via API, teams pull bounce rates, spam flags, and reputation signals into internal dashboards or data warehouses for custom reporting and alerting.
- White-label agency platforms: Agencies build branded outbound tools on top of Smartlead's API, provisioning client accounts, campaigns, and inboxes programmatically.
- Multi-step sequence A/B testing: Developers use the API to programmatically create and iterate on sequence variants, measuring reply rates and positive intent rates across cohorts.