Smartlead

Smartlead and Instantly are the two dominant cold email infrastructure platforms and overlap significantly: unlimited inbox connections, unlimited warmup, master inbox, agency-friendly pricing. Smartlead wins on advanced sequence conditional logic, sub-account management for agencies, and the raw sending caps at Unlimited Smart ($174/mo) which can handle 12M leads and 60M emails. Instantly wins on the AI-assisted sequence writing, AI-powered CRM, and the SuperSearch built-in lead database. Most agencies trial both and pick based on UX and feature fit.

For most agencies, the Unlimited Smart plan at $174/month (or $145/mo annual) is the sweet spot — it supports up to 12 million unique leads, 60 million monthly emails, sub-accounts for client management, and the advanced sequence logic agencies need. A smaller agency or solo consultant can get started on Pro at $94/month ($78/mo annual). Unlimited Prime at $379/month adds white-labeling for agencies that want to resell Smartlead as their own branded service. Annual billing saves 17% across all tiers.

Yes, and it is included free with unlimited usage on every paid plan. Smartlead's warmup network simulates real human email activity between Smartlead users to build sender reputation on new or cold sending domains. The warmup includes senders, automatic replies, marks-as-important, and spam folder rescues. For cold email at scale, running warmup for 2-4 weeks on any new domain before launching campaigns is standard practice and materially improves inbox placement.

Not at the same level as Instantly's SuperSearch or Apollo. Smartlead focuses on email infrastructure and assumes you bring your own lead list, import from a CRM, or use a separate data provider like Apollo, ZoomInfo, or Clay. Some sub-tools and marketplace integrations add lead discovery, but it is not a core feature. If you want an all-in-one tool with a built-in prospecting database, Instantly or Apollo are better fits; if you already have leads and need the cheapest reliable sending infrastructure, Smartlead wins.

Yes, on the Unlimited Prime plan at $379/month. White-labeling includes custom branding on the client dashboard, custom domains, your own logo, and the ability to resell Smartlead as your own cold email service without showing the Smartlead brand. This is attractive for lead-gen agencies that want to productize cold email for their customers. Sub-accounts with client-level reporting are available at the Unlimited Smart tier without full white-labeling.

Smartlead is GDPR compliant, provides DPA on request, and supports standard opt-out and unsubscribe management. Like other US-based cold email tools, final compliance depends on your sending practices — legitimate interest basis, accurate sender identification, and honoring opt-outs. For EU-to-EU cold email, Lemlist's native French hosting and EU data residency is a slight advantage. For global agencies running mixed audiences, Smartlead's compliance is sufficient.

Conditional sequences let you build logic that changes the next step based on reply content, link clicks, or open behavior. For example: if a prospect replies with interest, automatically pause the sequence and notify the AE. If they click a link but do not reply, send a specific follow-up. If they bounce, mark the lead invalid and stop all future sends. This is more sophisticated than the linear sequences in most cheaper cold email tools and closer to the workflow logic in Outreach and Salesloft — at a fraction of the price.