Category
Cold Email Software
Key features
AI agents that find and email leads
Unlimited mailboxes with rotation
21 day mailbox warm up
01 — Overview
What is
FirstSales
FirstSales is a cold email platform where AI agents find leads, write a personal email to each prospect, send from many warmed mailboxes and follow up until they reply. Every connected mailbox gets a 21 day warm up, SPF, DKIM and DMARC checks, list cleaning and health monitoring, with sending rotated across inboxes. Teams can also run their own templates in manual mode, work replies in one inbox and turn LinkedIn post engagement into leads with Signals.
02 — Who it’s for
Ideal Customer Profile
Founders, sales teams and agencies running outbound email at volume, mostly startups and small to mid sized companies.
03 — Capabilities
Key Features
AI agents that find and email leads
Unlimited mailboxes with rotation
21 day mailbox warm up
Pre send list cleaning
Unified reply inbox
LinkedIn engagement Signals
API, CLI and AI agent skills
05 — Similar tools
Alternatives
06 — FAQ
Frequently Asked Questions
What is FirstSales used for?
FirstSales is used to run cold email outbound end to end: finding leads, writing personal emails with AI, warming and rotating mailboxes, and following up until prospects reply.
Can I write my own sequences instead of using AI?
Yes. Manual mode, called Template mode in the app, sends your own sequences without AI writing.
How does FirstSales protect deliverability?
Each mailbox warms up over 21 days, authentication records are checked with plain instructions to fix them, addresses are cleaned before sending, and sending moves to healthy inboxes if one has trouble.
Does FirstSales have an API?
Yes. It has developer docs and an API, a command line tool on npm, and skills so coding agents like Claude Code can set up and run campaigns.