WarmySender — cold email, email warmup, LinkedIn outreach, and multichannel outreach in one platform
WarmySender combines four outreach pillars in a single tool: cold email campaigns, peer-to-peer email warmup, LinkedIn outreach automation, and multichannel sequences that mix email and LinkedIn touches. It is built for sales teams, lead-gen agencies, recruiters, and founders who want to book meetings without paying per-user pricing for every channel.
The four pillars
Cold emailing — multi-step cold email campaigns with follow-ups, A-Z subject testing, conditional branching, spintax, and merge tags. Bounce protection runs before send to keep sender reputation clean.
Email warmup — a peer-to-peer warmup network where real mailboxes exchange real conversations. Multi-turn threads, automatic spam-folder rescue, and per-mailbox health monitoring train inbox placement on Gmail, Microsoft 365, Outlook.com, Yahoo, and any IMAP/SMTP provider.
LinkedIn outreach — automated connection requests, messages, and InMails through Unipile OAuth (no password sharing). A multi-week warmup ramp, conservative per-account daily limits, and a dedicated proxy per account keep profiles inside LinkedIn's safety thresholds.
Multichannel — sequences that combine email and LinkedIn steps with conditional branching. Replies from both channels arrive in a unified inbox so reps work one queue, not two.
Why teams pick WarmySender
One subscription instead of separate tools for email, warmup, and LinkedIn.
Per-platform pricing instead of per-seat — agencies and SDR teams scale without paying for every rep on every channel.
Built-in B2B lead database covering verified contacts across the US and Canada, searchable by industry, location, company size, and job title.
Account-safety guardrails on every channel: warmup health gates for email, ramp schedules and dedicated proxies for LinkedIn, and per-domain throttling for cold campaigns.
Public REST API and a Model Context Protocol (MCP) server so cold email, warmup, LinkedIn, and multichannel sequences are reachable from Claude Desktop, Claude Code, Cursor, Windsurf, Zed, and any MCP-compatible AI assistant.
How email warmup works
Mailboxes connected to WarmySender exchange messages with other verified mailboxes in the network. Each warmup email pulls from a large pool of subject and body variations so spam filters cannot pattern-match on repeated content. Threads run multi-turn — replies, forwards, and follow-ups — and the system automatically rescues messages that land in spam to train providers to trust the sender. Mailboxes whose spam rate climbs are paused and excluded from the pool to protect everyone else.
How LinkedIn outreach works
LinkedIn accounts connect via Unipile OAuth — no credentials are stored. New accounts start on a multi-week ramp with low daily invite and message limits, then graduate to safe maximums. Each account is paired with a dedicated proxy located near the user's real IP, drawn from a pool spanning many countries. Real-time health monitoring auto-pauses an account before LinkedIn can issue a restriction.
Pricing
Plans are tiered by sending volume rather than seat count. A LinkedIn add-on is sold per seat and works alongside any plan. See the pricing page for current tier details and annual discounts.
Who uses WarmySender
Lead-gen agencies running multi-channel campaigns for clients, SDR teams that need email and LinkedIn from day one, recruiters sourcing candidates through both channels, and founders or consultants booking meetings without juggling separate tool stacks.