Cold email that SDR teams can trust to land in primary
Equip your SDR team with dedicated IPs, sequences that optimize themselves, a built-in dialer, and one unified inbox. No shared infrastructure, no gambling on deliverability, every rep sends from IPs that answer to your team alone.
Lambda Group
More pipeline, fewer deliverability fires to put out
Your whole team runs on a single plan, so adding SDRs doesn't add to your bill.
Your team sends from IPs that belong to your organization alone, with no shared pool touching other companies.
Call leads without ever leaving the platform. Call recording, health scores, and analytics all come standard.
Replies get sorted by intent automatically, routing hot leads to the right rep without anyone doing it by hand.
The way SDR teams put Sendbox to work
Add as many Gmail, Outlook, or IMAP accounts as your team needs, with no per-seat charges attached. Warmup kicks off automatically in the background while DNS health checks confirm your SPF, DKIM, and DMARC records are in order.
Build multi-step sequences with conditional logic, spintax, and A/B variants at every step. Smart optimization automatically pauses whatever isn't working, so your team's attention stays on what is.
Every reply funnels into one unified inbox. AI tagging sorts responses by intent automatically (interested, not interested, out of office, and so on), and the built-in dialer lets you call warm leads without leaving the platform.
Teams pushing 50K-500K emails a month need infrastructure built to handle that load. Dedicated IPs paired with sender rotation across unlimited mailboxes let you scale up without torching your domains along the way.
Because there's no per-seat pricing, bringing on another SDR adds nothing to your bill on Sendbox. Compare that to Lemlist at $109/user/mo or Apollo at $79/user/mo, where every new hire is a new line item. Your whole team shares a single plan instead.
Run your email sequences and place calls through the built-in dialer without switching platforms. Call recordings and health scores keep track of how each rep is actually performing.
What pulls SDR teams over to Sendbox
Your SDR team deserves infrastructure built to scale with them
Most cold email tools bill per seat and put everyone on shared IPs, so growing from 3 SDRs to 10 multiplies your costs right along with your headcount. Sendbox bills per plan instead of per seat, and every rep still gets their own dedicated IP.
No per-seat pricing
Sendbox bills per plan, not per user, so a five-person SDR team costs the same as a solo one. That same five-person team on Lemlist's Multichannel Expert runs $545/mo (at $109/user), and on Apollo Professional it's $395/mo (at $79/user). The gap only grows as your headcount does.
Built-in dialer for warm follow-ups
The moment a lead replies with interest, your SDR can call them straight from Sendbox, no jumping to a separate dialer tool. Call recording, health scores, and analytics all come built in. Most competitors either skip a dialer entirely (Instantly, Woodpecker) or charge extra to unlock one.
Got questions? We've got answers.
Still stuck? Talk to us →The Plus plan covers your entire team, 250,000 emails, 100,000 leads, and dedicated IPs, with no per-seat charges added on. For comparison, Lemlist at $109/user/mo runs $545/mo for a team of 5 SDRs.
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