
Just met with Envision Health — she started the call by saying, “I wanted to compliment you on your email because I never open those kinds of emails.”
From domain setup to reply management, we manage your entire cold email operation on an infrastructure built to maximize deliverability, response rates, and the booking of highly-qualified meetings.
Outbound email campaigns sent directly to your ideal prospects, done for you.

Our enhanced email warming system improves deliverability to ensure that your emails land in prospects' inboxes and not their spam folder

Campaigns are distributed across various sending accounts, domains, and servers to reduce the risk of being flagged as spam and to provide better performance and reliability

Between our optimized sending systems and expert email copywriting, we can consistently launch campaigns with high open and reply rates (5x higher industry average)
We handle everything from copywriting and lead verification to domain and even reply management.
Powered by Parakeet, our email infrastructure is built to maximize inbox placement, protect domain health, and drive higher positive reply rates.
All outreach is done through premium Google Workspace accounts, warmed and configured specifically for cold email. Sending accounts are paired with domains and are complete with full security authentication (SPF, DKIM, DMARC).
Hear it from our customers!
G2 Rated 5.0 on G2 — read verified reviews ★ ★ ★ ★ ★

Just met with Envision Health — she started the call by saying, “I wanted to compliment you on your email because I never open those kinds of emails.”

I’ll talk to anyone considering partnering with OSP. You guys are the best.

We engaged OSP to reach new clients as well as secure current renewals. Campaigns generated new revenue and reduced our customer churn rate.
Partner with an outbound sales team that can deliver more qualified demos and appointments directly to your calendar, at a price that’s less than a full-time sales development representative.