Mailshake

Mailshake is cold email outreach software for sales teams and agencies, with sequences, unlimited warmup on every plan and a power dialer on the top tier.

Mailshake sends personalized cold email in automated sequences and keeps following up until a prospect answers. It is built for teams that win business by writing to people first. Mailshake, LLC makes it and runs the company from offices in Austin, Texas. In March 2026 the company acquired Warm Up Your Email, and its warmup now comes with every account. Campaigns are built as sequences of emails, and follow-ups stop on their own once a recipient replies. Mail merge tags personalize each message, and A/B testing compares versions of a step across the list. SHAKEspeare, the built-in AI writer, drafts a whole email sequence. Email Rotation spreads sending across several connected addresses, while warmup and email verification protect each sender's reputation. On the Sales Engagement plan, the Mailshake Dialer places calls from the browser, and tasks put phone and LinkedIn steps beside email. Lead temperature, a unified inbox and engagement reports show which prospects are responding. The core buyers are sales development reps, founders and small sales teams who run outbound email themselves. Agencies managing campaigns for several clients have an Agency plan with unlimited sending addresses. Marketers use it for link building and PR outreach as well as sales. It is sold per account, in plans that grow with the number of sending addresses and the channels included, billed monthly or annually. Data Finder, a searchable prospect database, and Ready to Use Mailboxes are bought as add-ons. A campaign usually starts with a list pulled from Data Finder or imported from a CRM, enrolled into a sequence that then runs unattended. Replies from every connected mailbox land in one inbox, and the rep takes the conversation from there. For teams working in HubSpot, Salesforce or Pipedrive, campaign activity is written back to the contact record, and HubSpot prospects can join a campaign automatically. Managers turn a campaign that works into a Team Playbook, so every rep sends the sequence that earned replies.