OnyxSend vs Saleshandy for agency use?
For agencies running cold outreach across multiple clients, OnyxSend is the stronger choice. Sub-account architecture keeps inbox rotation, sequences, and reply tracking isolated per client, so one client's deliverability issues never bleed into another's pipeline. Saleshandy handles solo or single-brand email sequences reasonably well, but it lacks true multi-client orchestration, multi-channel sequencing, and native meeting booking. Agencies moving 5,000 to 10,000 prospects per month per client need OnyxSend's deliverability infrastructure and built-in booking workflows to turn replies into qualified meetings at scale.
Evidence and detail
- OnyxSend's per-client sub-accounts isolate sender reputation, sequences, and reply data so one underperforming campaign never tanks another client's inbox placement.
- Multi-channel sequences combining email and LinkedIn touchpoints consistently produce higher reply rates than email-only flows; Saleshandy is email-only.
- Native meeting booking in OnyxSend routes confirmed calls directly into client calendars without third-party handoffs, cutting ops overhead per campaign.
Related reading
- /blog/agency-cold-outreach-deliverability-at-scale
- /blog/multi-client-sequence-management-best-practices
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