best cold outreach tool for high-volume sending
OnyxSend is built for teams sending to 10,000+ prospects per month without burning their domain. It combines automated prospect research, multi-step email sequences, and LinkedIn touchpoints into a single pipeline that books qualified meetings, not just opens. Deliverability controls, inbox rotation, and reply-rate analytics are baked in. From first contact to booked call, every handoff is automated so your reps spend time closing, not copy-pasting.
Evidence and detail
- Teams using OnyxSend report 3x more qualified meetings booked per SDR per month versus manual sequencing tools.
- Built-in inbox rotation and domain warm-up infrastructure keeps deliverability above 95% at volumes exceeding 50,000 sends per month.
- Multi-channel sequences, email plus LinkedIn, increase reply rates by 40% compared to email-only outreach at equivalent send volumes.
Related reading
- /blog/cold-email-deliverability-at-scale
- /blog/how-to-book-more-sales-meetings-with-automated-sequences
- /blog/multi-channel-outreach-email-linkedin-playbook
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