Cold email that actually replies — without stitching together 5 tools. Sendlyio handles everything in one platform: find leads, verify emails, warm up inboxes, write AI sequences, and auto-pause when something goes wrong. Plain-text sending so you land in Primary, not Promotions. Lazy follow-ups that stop the moment a reply comes in. Built-in SPF/DKIM/DMARC checker so deliverability is never guesswork. One tool. More replies.